uk: Комп'ютерні науки

description: Eric will discuss different ways of using SQL data within Plone, primarily focusing on a methodology using SQLAlchemy and collective.trajectory that makes external data act as if it were Plone content.

uk: вхід без авторизації

name: Integrating SQL Data into your Plone Site


Keynote: Python Web Technologies

Brandon Rhodes

type: Person

cs: Informatika

de: Informatik

fi: tietojenkäsittelytiede

uk: Комп'ютерні науки

en: Computer Science

fr: Informatique

da: Datalogi

es: Ciencias de la Computación

nl: Informatica

cs: Technické vědy

de: Ingenieurwissenschaften

fi: tekniikka

uk: Інженерія

en: Engineering Sciences

fr: Ingénierie

da: Ingeniørvidenskab

es: Ingeniería

nl: Engineering

description: Brandon, who has been using Python since 1997 or 1998 (the exact year has been lost to history), will share his perspective on the past, present, and future of Python for the Web.

TIB AV-Portal

type: Service

type: WebContent

type: MediaObject

@language: en

cs: přihlášení není vyžadováno

de: keine Anmeldung erforderlich

uk: вхід без авторизації

en: no login required

nl: geen login vereist

Plone Foundation

type: Organization

cs: Video

de: Video

fi: Video

uk: Відео

en: Video

fr: Vidéo

da: Video

nl: Video

es: Video


uk: Комп'ютерні науки

description: A series of short talks on diverse topics

uk: вхід без авторизації

name: Plone Conf 2016 - Day 3: Lightning Talks


Making Workflows Work for You

uk: Комп'ютерні науки

description: Stephan will describe the Zope-based workflow technologies he is currently working on. The Zope/Plone community has tried multiple times to make use of formal workflow standards to drive online workflow processes and UIs, without much success. In this talk Stephan will analyze the situation and try to identify why not. His current company, Shoobx, has finally been successful in creating BPMN-based workflows using Python- and Zope-based technologies, which they extended and which are available for everyone to use. Some of the hard problems that were solved: fully automated UI generation, wizard generation, ability to revert to any point, exception handling, simulations and QA testing. He'll also provide a quick update on what he has been up to for the last 10 years since he presented at PloneConf 2006 Seattle!

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Manabu will introduce two open source Plone add-ons that he and his colleagues have created.

uk: вхід без авторизації

name: Managing Video and VR Content with Plone


Plone Security in Context

uk: Комп'ютерні науки

description: Plone is one of the most reliable content management systems and it has a very impressive security track record compared to other relevant commercial and open source CMSes. Alexander will provide insights into the security concepts of Plone and other systems. He will also explain why Plone is a good choice for security-critical portals and websites, referencing several security studies and techniques that analyze various security concerns. In addition to a general overview of security concepts and how Plone utilizes them, Alexander will also describe how the security teams of different CMSes work, making this talk interesting to decision makers as well as system administrators, integrators and developers.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: A clever content and digital experience management solution based on open source software can boost the reception of your customer's brands. See how Plone and Plone-based application solutions like the Quaive social collaboration suite can connect to services using the Python standard library's native connections and protocols. The internet of things - IoT - is reachable by a twist of the hand.

uk: вхід без авторизації

name: Using Intranets to Manage Location Experience: Multi-device experience is crucial when you visit a venue for an event or a business meeting.


uk: Комп'ютерні науки

description: As open source is produced by people, it is made of feelings. This talk aims to explore different questions about the complex relationships between the developer, the software and the community. Why do we feel committed to our community? Why is it so fun to work for free for Plone (and not that fun to work for customers who pay us)? Why do we want Plone to be always better? What makes "us", the Plone community, a real thing?

uk: вхід без авторизації

name: "We, Plone": Psychoanalysis of a community. Psychology of developers. What motivates "us", the Plone community?


Web Development with Vim

uk: Комп'ютерні науки

description: Vim is everywhere. But out of the box, it is tedious to use and doesn't aid you much with your programming tasks. Due to its flexibility, it can be extended and configured to perfectly suit your needs. This demo shows you what is possible with vim, how it can be configured to efficiently support your workflow and help you writing better code with auto completion, code analysis and auto formating.

uk: вхід без авторизації


uk: Комп'ютерні науки

description: Websauna is a Pyramid and SQLAlchemy-based high level web framework with a lot of Plone influence. It is aimed at building customer-facing web applications. Think of it as Django without too much Django in it. Core features include automatic admin interface, Bootstrap theming, sign in and sign up, social media integration, Deform-based forms, Jinja templating, traversing and ACL. Plus of course all the Pyramid goodness.

uk: вхід без авторизації

name: Websauna: A High Level Python Web Framework


uk: Комп'ютерні науки

description: This talk will present several examples where complex Plone web sites have been created by non-developers using through the web Plone tools: Rapido, Dexterity, and Diazo. Eric will answer the following questions. - Why is Plone a good back end if you are a front end developer? - What are the best practices? - How do you move from TTW to file-system based coding? - How do you manage deployment? - How do you integrate your usual front end stack?

uk: вхід без авторизації

name: Why would they need a CMS?: A demo of Plone's through the web customization tool.


keywords:
Qualitätsmanagement
Qualitätssicherung
Qualitätskonzepte
Bildungsorganisation
PDCA-Zyklus
kontinuierlicher Verbesserungsprozess
KVP
TQM
Qualitätsprüfung
Qualitätsmerkmal
QM-System
ISO 9000
Akkeditierung
Quality Audits
Befragung
Evaluation
Akkreditierungsrat
Akkreditierungsagentur
Programmakkreditierung
Systemakkreditierung
Studiengänge
Peer-Review
Auditierung

de: Wirtschaftswissenschaften

uk: Бізнес та економіка

en: Business and Economics

de: Erziehungswissenschaften

uk: Педагогічні науки

en: Educational Sciences

de: Rechts-, Wirtschafts- und Sozialwissenschaften

uk: Право, економіка та суспільні науки

en: Law, Economics and Social Sciences

description: Das Video gibt Einblicke in das Thema Externes Qualitätsmanagement in Bildungsorganisationen. Es wird u.a. auf Akkreditierungen und Quality Audits eingegangen.

@language: de

uk: вхід без авторизації

name: Qualitätsmanagement an Bildungseinrichtungen: Externes Qualitätsmanagement

name: Carl von Ossietzky Universität Oldenburg

addressCountry: DE

addressLocality: Oldenburg

addressRegion: Lower Saxony


Wasserstoff-Knalldose

keywords:
Wasserstoff
chemische Reaktion
Knallgas
Explosion
Demonstrationsexperiment
fachfremd Unterrichten
Chemie
Experiment

de: Chemie

fi: kemia

uk: Хімія

en: Chemistry

fr: Chimie

da: Kemi

es: Química

nl: Scheikunde

de: Mathematik, Naturwissenschaften

uk: Математика, природничі науки

en: Mathematics, Natural Sciences

uk: вхід без авторизації

Europa-Universität Flensburg (EUF)

addressLocality: Flensburg

addressRegion: Schleswig-Holstein

name: Institut für mathematische, naturwissenschaftliche und technische Bildung


Verdünnungsreihe mit Natronlauge

keywords:
fachfremd Unterrichten
Chemie
chemische Reaktion
Säure-Base-Reaktion
Experiment
pH-Wert
Indikator
Schüler:innenversuch

uk: Математика, природничі науки

uk: вхід без авторизації


Reaktion von Aktivkohle und Kupferoxid

keywords:
fachfremd Unterrichten
Chemie
Experiment
Schüler:innenversuch
chemische Reaktion
Redoxreaktion
Kalkwasser

uk: Математика, природничі науки

uk: вхід без авторизації


Kaltes Licht

keywords:
fachfremd Unterrichten
Chemie
Experiment
Luminol
kaltes Licht
Chemolumineszenz
chemische Reaktion
Energieformen
Demonstrationsexperiment

uk: Математика, природничі науки

uk: вхід без авторизації


Geheimtinten

keywords:
fachfremd Unterrichten
Chemie
Experiment
Schüler:innenversuch
Redoxreaktion

uk: Математика, природничі науки

uk: вхід без авторизації


Pipettieren mit Messpipetten

keywords:
fachfremd Unterrichten
Chemie
Pipette
Laborwissen

uk: Математика, природничі науки

uk: вхід без авторизації


keywords:
fachfremd Unterrichten
Chemie
Experiment
digitale Messsensoren
Kerze
Verbrennungsreaktion
chemische Reaktion
Schüler:innenversuch
Demonstrationsexperiment
digitale Medien

uk: Математика, природничі науки

uk: вхід без авторизації

name: Kerzenfahrstuhl mit digitalen Messsensoren


Säuren lösen Kalk

keywords:
fachfremd Unterrichten
Chemie
Experiment
Schüler:innenversuch
Säure-Base-Reaktion
Verdrängungsreaktion
Säurestärke

uk: Математика, природничі науки

uk: вхід без авторизації


Gummibären-Hölle

keywords:
fachfremd Unterrichten
Chemie
chemische Reaktion
Demonstrationsexperiment
Experiment
exotherm

uk: Математика, природничі науки

uk: вхід без авторизації


keywords:
fachfremd Unterrichten
Chemie
Explosion

uk: Математика, природничі науки

uk: вхід без авторизації

name: Nicht nachmachen!: Beispiel einer Redoxreaktion, die nicht für den Unterricht geeignet ist!


keywords:
fachfremd Unterrichten
Chemie
Experiment
Verbrennungsreaktion
Aggregatzustände
Anfangsunterricht
Schüler:innenversuch
Demonstrationsexperiment
chemische Reaktion

uk: Математика, природничі науки

uk: вхід без авторизації

name: Untersuchung des Gases aus Kartuschenbrennern


keywords:
fachfremd Unterrichten
Chemie
Experiment
chemisches Gleichgewicht
Temperaturabhängigkeit

uk: Математика, природничі науки

uk: вхід без авторизації

name: Das chemische Gleichgewicht am Beispiel von Stickstoffdioxid und Distickstofftetroxid


keywords:
Qualitätsmanagement
Evaluationsforschung
Indikatoren
Datenerhebung
Maßnahmen
Analyse
Evaluationsverfahren
Kompetenzbasierte Evaluation
Evaluationsbogen
formative Evaluation
kontinuierlicher Verbesserungsprozess
Zufriedenheit
PDCA-Zyklus
Lernerfolg
Verbesserung
summative Evaluation
Bildungsprozesse
Mikroebene
Qualitätssicherung
Bildungsorganisation
Evaluation
Instrument
DIN EN ISO 9001
QM
Optimierung
Kontrolle
Steuerung
Reflexion

uk: Педагогічні науки

uk: Право, економіка та суспільні науки

description: Das Video gibt Einblicke in das Thema Evaluation und Qualitätsmanagement in Bildungsorganisationen. Es werden u.a. Funktion und Ablauf von Evaluationen erläutert.

uk: вхід без авторизації

name: Qualitätsmanagement in Bildungsorganisationen: Evaluation


keywords:
Mollusca
undetermined larva
Helgoland 2011

de: Biologie

uk: Біологія

en: Biology

uk: Математика, природничі науки

description: Undetermined molluscan larva, length 350 mm, Helgoland 2011. 0:33 min. This larva was only observed once and probably belongs to the molluscs. Video can be used for teaching.

uk: вхід без авторизації

name: Mollusca larva undetermined Helgoland 2011

Technische Universität Braunschweig

addressLocality: Braunschweig


Obelia sp. Helgoland 2011

keywords:
Cnidaria
Hydrozoa
Leptomedusae
Campanulariidae
Obelia sp.
medusa
Helgoland 2011

uk: Математика, природничі науки

description: Obelia sp. (Cnidaria, Hydrozoa, Leptomedusae, Campanulariidae), diameter 1.7 mm, Helgoland 08.2011. 1:04 min. Medusae of Obelia are common in samples taken near the shore. They hatch from a gonangium with a diameter (with tentacles) of about 600 µm. In this specimen the gonads are developing. Video can be used for teaching.

uk: вхід без авторизації


Oikopleura dioica Helgoland 2011

keywords:
Tunicata
Appendicularia
Oikopleuridae
Oikopleura dioica
habitus
Helgoland 2011

uk: Математика, природничі науки

description: Oikopleura dioica (Tunicata, Appendicularia, Oikopleuridae), habitus, early specimen, length of "head" 250 µm, Helgoland 08.2011. 0:51 min. These tiny animals are special in their “larval” organization and unique filter feeding structure, which they shed easily. Though mainly only the body with trunk and tail is found in plankton samples. Video can be used for teaching.

uk: вхід без авторизації


Ophiura albida pluteus Helgoland 2011

keywords:
Echinodermata
Ophiuroida
Ophiuroidae
Ophiura albida
late pluteus larva
Helgoland 2011

uk: Математика, природничі науки

description: Ophiura albida (Echinodermata, Ophiuroida, Ophiuroidae), early pluteus larva, width 1.7 mm, Helgoland 08.2011. 0:51 min. Development of Ophiuroida is characterized by the ophiopluteus larva with mainly four and up to six pairs of arms, stabilized by delicate calcite rods. Anchoring body rods and additional transvers rods of a species-specific arrangement connect these skeletal elements. Ciliary bands around the mouth and on the arms propel the plutei through the water. Video can be used for teaching.

uk: вхід без авторизації


Pectinaria koreni larva Helgoland 2011

keywords:
“Polychaeta”
Terebellida
Pectinariidae
Pectinaria koreni
metatrochophora
Helgoland 2011

uk: Математика, природничі науки

description: Pectinaria koreni (“Polychaeta”, Terebellida, Pectinariidae), metatrochophora, length 650 µm, Helgoland 08.2011. 0:57 min. This larva is characterized by a strong proto- and telotroch and numerous chromatophores, partly in segmental arrangement. Video can be used for teaching.

uk: вхід без авторизації


Phoronis muelleri 1 Helgoland 2011

keywords:
Phoronida
Phoronis muelleri
actinotrocha larva
Hufeisenwurm
Helgoland 2011

uk: Математика, природничі науки

description: Phoronis muelleri (Phoronida), actinotrocha larva, Helgoland 2011. 0:55 min. The phoronids larvae start with tiny forms about 50 µm in length which soon develops first tentacles becoming more numerous up to 48 in some species. Old larvae reach a length up to 1 mm. The mouth is hidden under a pre-oral lobe. Cilia on the tentacles and a heavily ciliated telotroch around the anus propel the larvae through the water. Video can be used for teaching.

uk: вхід без авторизації


Phoronis muelleri 2 Helgoland 2011

uk: Математика, природничі науки

description: Phoronis muelleri (Phoronida), actinotrocha larva, Helgoland 08.2011. 0:37 min. The phoronids larvae start with tiny forms about 50 µm in length which soon develops first tentacles becoming more numerous up to 48 in some species. Old larvae reach a length up to 1 mm. The mouth is hidden under a pre-oral lobe. Cilia on the tentacles and a heavily ciliated telotroch around the anus propel the larvae through the water. Video can be used for teaching.

uk: вхід без авторизації


Phoronis muelleri 3 Helgoland 2011

uk: Математика, природничі науки

description: Phoronis muelleri (Phoronida), actinotrocha larva, Helgoland 08.2011. 0:42 min. The phoronids larvae start with tiny forms about 50 µm in length which soon develops first tentacles becoming more numerous up to 48 in some species. Old larvae reach a length up to 1 mm. The mouth is hidden under a pre-oral lobe. Cilia on the tentacles and a heavily ciliated telotroch around the anus propel the larvae through the water. Video can be used for teaching.

uk: вхід без авторизації


Phoronis muelleri 4 Helgoland 2011

uk: Математика, природничі науки

description: Phoronis muelleri (Phoronida), actinotrocha larva, Helgoland 08.2011. 0:35 min. The phoronids larvae start with tiny forms about 50 µm in length which soon develops first tentacles becoming more numerous up to 48 in some species. Old larvae reach a length up to 1 mm. The mouth is hidden under a pre-oral lobe. Cilia on the tentacles and a heavily ciliated telotroch around the anus propel the larvae through the water. Video can be used for teaching.

uk: вхід без авторизації


Pleurobrachia pileus Helgoland 2011

keywords:
Ctenophora
Tentaculifera
Cydippida
Pleurobrachiidae
Pleurobrachia pileus
Helgoland 2011

uk: Математика, природничі науки

description: Pleurobrachia pileus (Ctenophora, Tentaculifera, Cydippida, Pleurobrachiidae), diameter 600 µm, Helgoland 08.2011. 0:43 min. Pleurobrachia pileus may be abundant in the North Sea and the early stages as well. Under the microscope the whole body plan is visible. Video can be used for teaching.

uk: вхід без авторизації


Podon leuckarti Helgoland 2011

keywords:
Podon leuckarti
Helgoland 2011

uk: Математика, природничі науки

description: Podon leuckarti (Crustacea, Branchiopoda, Onychopoda, Cladocera, Podonidae), length 850 µm, Helgoland 08.2011. 0:20 min. There are only a few species in n the marine environment, main genera are Evadne and Podon, the latter has a dorsal depression between head and thorax and a rounded carapace, in females bearing the eggs. Video can be used for teaching.

uk: вхід без авторизації


Polydora sp. 2 Helgoland 2011

keywords:
"Polychaeta"
Spionida
Spionidae
Polydora sp.
late larva
Helgoland 2011

uk: Математика, природничі науки

description: Polydora sp. 2 ("Polychaeta", Spionida, Spionidae), late larva, length 900 µm, Helgoland 08.2011. 0:25 min. Spionid larvae can be found in the plankton during the whole year and in different stages. Early stages are very vivid. They are propelled by the prototroch and telotroch. The nectochaetes, starting with three-chaetiger larvae, may develop up to 20 chaetiger segments before settle down at the bottom. Video can be used for teaching.

uk: вхід без авторизації


Polydora sp. 1 Helgoland 2011

uk: Математика, природничі науки

description: Polydora sp. 1 ("Polychaeta", Spionida, Spionidae), late larva, length 300 µm, Helgoland 08.2011. 0:37 min. Spionid larvae can be found in the plankton during the whole year and in different stages. Early stages are very vivid. They are propelled by the prototroch and telotroch. The nectochaetes, starting with three-chaetiger larvae may develop up to 20 chaetiger segments. Video can be used for teaching.

uk: вхід без авторизації


Anthozoa planula larva Helgoland 2011

keywords:
nidaria
Anthozoa
planula larva
Helgoland 2011

uk: Математика, природничі науки

description: Planula larva (Cnidaria, Anthozoa), length 350 mm, Helgoland 08.2011. 0:19 min. The planula is the typical larva of Cnidaria. In Anthozoa it is often without open gastric space. Video can be used for teaching.

uk: вхід без авторизації


keywords:
nidariaBalanus crenatus
Crustacea
Cirripedia
Balanidae
nauplius larva
Helgoland 2011
Anthozoa
planula larva

uk: Математика, природничі науки

description: Balanus crenatus (Crustacea, Cirripedia, Balanidae), nauplius larva, lateral view, length 240 µm, Helgoland 08.2011. 0:38 min. Nauplius larvae (six stages) have a triangular carapace with two characteristic fronto-lateral horns and a caudal spine, mainly visible in lateral view. Video can be used for teaching.

uk: вхід без авторизації

name: Balanus crenatus, nauplius larva, Helgoland 2011


Centropages typicus Helgoland 2011

keywords:
Crustacea
Copepoda
Calanoida
Centropagidae
Centropages typicus
Helgoland 2011

uk: Математика, природничі науки

description: Centropages typicus (Crustacea, Copepoda, Calanoida, Centropagidae), length of antennae 400 µm, Helgoland 08.2011. 0:50 min. The fifth pedigerous somite (PD5) (= sixth thoracic somite) with characteristic asymmetrical spiniform posterior corner. Video can be used for teaching.

uk: вхід без авторизації


Cerastoderma sp. Veliger Helgoland 2011

keywords:
Mollusca
Bivalvia
Heterodonta
Veneroida
Cardiidae
Cerastoderma sp.
veliger larva

uk: Математика, природничі науки

description: Cerastoderma sp. (Mollusca, Bivalvia, Heterodonta, Veneroida, Cardiidae) veliger larva, diameter 350 µm, Helgoland 08.2011. 0:44 min. The body is enclosed between the two shells, velum with strong cilia, can be retracted. Velum up they swim through the water. Video can be used for teaching

uk: вхід без авторизації


Crangon crangon Helgoland 2011

keywords:
Crustacea
Malacostraca
Decapoda
Pleocyemata
Caridea
Crangonidae
Crangon crangon
zoea larva II
Helgoland 2011

uk: Математика, природничі науки

description: Crangon crangon (Crustacea, Malacostraca, Decapoda, Pleocyemata; Crangonidae), zoea larva II, width of eyes 680 µm, Helgoland 08.2011. 0:35 min. Characteristic larva of Decapoda is the zoea, shrimp-like forms with elongated abdomen consisting of 5 segments and telson. The latter is of specific shape, bearing a characteristic pattern of chaeta. Without pleopods, first stage(s) without uropods, which later form the lateral tail fin. Video can be used for teaching.

uk: вхід без авторизації


Cyphonautes larva Helgoland 2011

keywords:
Bryozoa
Ectoprocta
Cheilostomata
Membraniporidae
Membranipora sp.
cyphonautes larva
Helgoland 2011

uk: Математика, природничі науки

description: Membranipoda sp., cyphonautes larva (Bryozoa (=Ectoprocta, Cheilostoma-ta, Membraniporidae), hight 350 µm, Helgoland 08.2011. 0:35 min. Only a few Bryozoa develop planktonic cyphonautes larvae. They are laterally compressed between two chitinous triangular shells. The multiciliate corona is used for locomotion. Video can be used for teaching.

uk: вхід без авторизації


Lineus sp. pilidium Helgoland 2014

keywords:
Nemertea
Nemertini
Heteronemertea
Lineidae
Lineus sp.
pilidium larva
Helgoland 2014

uk: Математика, природничі науки

description: Lineus sp. (Nemertea, Nemertini, Heteronemertea, Lineidae), pilidium larva, diameter 450 µm, Helgoland 08.2014. The taxon Heteronemertea in the taxon Nemertea or Nemertini develops characteristic planktonic pilidium larve (pilidium: form of roman helmet) with fore-lobe like a baseball-cap and hind lobe, at each side lateral lobes, all equipped with ciliary bands. The mouth is located between these lobes. An apical plate near the top bears a tuft of long stiff cilia. Video can be used for teaching.

uk: вхід без авторизації


Hubrechtella sp. Helgoland 2011

keywords:
Nemertea
Heteronemertea
Hubrechtiae
Hubrechtella sp.
pilidium larva
Helgoland 2011

uk: Математика, природничі науки

description: Hubrechtella sp. (Nemertea, Heteronemertea, Hubrechtidae), pilidium larva, width 650 µm, Helgoland 08.2011. 0:35 min. The taxon Heteronemertea in the taxon Nemertea or Nemertini develops characteristic planktonic pilidium larva (pilidum: form of roman helmet) with fore-lobe like a baseball-cap and hind lobe, at each side lateral lobes, all equipped with ciliary bands. The mouth is located between these lobes. An apical plate near the top bears a tuft of long stiff cilia. Video can be used for teaching.

uk: вхід без авторизації


Lanice conchilega larva Helgoland 2011

keywords:
“Polychaeta”
Terebellida
Terebellidae
Lanice conchilega
Helgoland 2011

uk: Математика, природничі науки

description: Lanice conchilega (“Polychaeta”, Terebellida, Terebellidae), early aulophora larva I, length of tube 480 µm, Helgoland 08.2011. 0:38 min. The unique development of Lanice conchilega leads to an early larva, which settles for shortly at the bottom, then forming a tube and starting a second planktonic life as aulophora with 3 stages. The transparent tube, open at both ends, is often covered by mud and small particles. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Nemertea
Heteronemertea
Lineidae
Lineus albocinctus
pilidium larva
Helgoland 2011

uk: Математика, природничі науки

description: Lineus albocinctus (Nemertea, Heteronemertea, Lineidae), pilidium larva, length 390 to 550 µm, Helgoland 08.2011. 1:06 min. The taxon Heteronemertea in the taxon Nemertea or Nemertini develops characteristic planktonic pilidium larva (pilidum: form of roman helmet) with fore-lobe like a baseball-cap and hind lobe, at each side lateral lobes, all equipped with ciliary bands. The mouth is located between these lobes. An apical plate near the top bears a tuft of long stiff cilia. Video can be used for teaching.

uk: вхід без авторизації


keywords: Coscinodiscus wailesii with Lagenisma coscinodisci

uk: Математика, природничі науки

description: Coscinodiscus wailesii (Bacillariophyceae, Coscinodiscaceae) with Lagenisma coscinodisci (Oomycota), diameter ca. 350 µm, Helgoland 07.2012. 0:25 min. Coscinodiscus species can be affected by parasitic organisms, e.g. oomycetes. Lagenisma coscinodisci was recently described. Video can be used for teaching.

uk: вхід без авторизації

name: Coscinodiscus and Lagenisma Helgoland 2012


Ditrichocorycaeus sp. Helgoland 2012

keywords:
Crustacea
Copepoda
Cyclopoida
Corycaeidae
Ditrichocorycaeus sp.
Helgoland 2012

uk: Математика, природничі науки

description: Ditrichocorycaeus sp. (Copepoda, Cyclopoida, Corycaeidae), male, length of eye 400 µm, Helgoland 07.2012. 0:42 min. Corycaeidae are unspecialized raptorial carnivores. They belong to the different copepods with extremely big eyes, function still not clear. Video can be used for teaching.

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Evadne nordmanni Helgoland 2012

keywords:
Crustacea
Branchiopoda
Onychopoda
Cladocera
Podonidae
Evadne nordmanni
Helgoland 2013

uk: Математика, природничі науки

description: Evadne nordmanni (Crustacea, Branchiopoda, Onychopoda, Cladocera, Podonidae), length 900 µm, Helgoland 07.2012. 0:23 min. There are only a few species of Cladocera in the marine environment, main genera are Podon and Evadne, the female of the latter have a pointed wide carapace, forming the brood chamber for the eggs which often becomes cumbersome. Video can be used for teaching.

uk: вхід без авторизації


Galathea sp. zoea larva Helgoland 2012

keywords:
Crustacea
Malacostraca
Decapoda
Pleocyemata
Anomura
Galatheidae
Galathea sp.
zoea larva
Helgoland 07.2012

uk: Математика, природничі науки

description: Galathea sp. (Crustacea, Malacostraca, Decapoda, Pleocyemata, Anomura, Galatheidae), zoea larva, length 1.7 mm, Helgoland 07.2012. 0:32 min. Larvae of the anamure crab Galathea show big, wide eyes, a distinct carapax and a broad telson with characteristic bristles. Video can be used for teaching.

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keywords:
Mollusca
Gastropoda
Caenogastropoda
Littorinidae
Littorina littorea
veliger larva
Helgoland 2012

uk: Математика, природничі науки

description: Littorina littorea (Mollusca, Gastropoda, Caenogastropoda, Littorinidae), diameter 400 µm, Helgoland 07.2012. 1:44 min. The characteristic veliger larva of marine prosobranch gastropods resembles a small snail with coiled shell bearing the body and the velum with two or four lappets. The rim of the velum shows strong cilia of different length which propel the small animals through the water. Video can be used for teaching.

uk: вхід без авторизації

name: Littorina littorea, veliger larva Helgoland 2012


Noctiluca scintillans Helgoland 2012

keywords:
Dinoflagellata
Dinophyceae
Noctilucales
Noctilucaceae
Noctiluca scintillans
Helgoland 2012

uk: Математика, природничі науки

description: Noctiluca scintillans (Dinoflagellata, Dinophyceae, Noctilucales, Noctilucaceae), diameter 450 µm, Helgoland 07.2012. 0:42 min. Popular plankton organisms with bladder-shaped, naked cells, 400–800 µm in diameter and transparent. The ingested food often can be determined, e.g. diatoms. Video can be used for teaching.

uk: вхід без авторизації


Oikopleura dioica Helgoland 2012

keywords:
Tunicata
Appendicularia
Oikopleuridae
Oikopleura dioica
habitus
Helgoland 2012

uk: Математика, природничі науки

description: Oikopleura dioica (Tunicata, Appendicularia, Oikopleuridae), habitus, early specimen, length of "head" 250 µm, Helgoland 07.2012. 1:00 min. These tiny animals are special in their “larval” organization and unique filter feeding structure, which they shed easily. Though mainly only the body with trunk and tail is found in plankton samples. Video can be used for teaching.

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Podon leuckarti Helgoland 2012

keywords:
Crustacea
Branchiopoda
Onychopoda
Cladocera
Podonidae
Podon leuckarti
Helgoland 2012

uk: Математика, природничі науки

description: Podon leuckarti (Crustacea, Branchiopoda, Onychopoda, Cladocera, Podonidae), length 1.05 mm, Helgoland 07.2012. 0:30 min. There are only a few species of Cladocera in the marine environment, main genera are Evadne and Podon, the latter has a dorsal depression between head and thorax and a rounded carapace, in females bearing the eggs. Video can be used for teaching

uk: вхід без авторизації


Upogebia sp. Helgoland 2012

keywords:
Crustacea
Malacostraca
Decapoda
Pleocyemata
Gebiidea
Upogebiidae
Upogebia sp.
zoea larva
Helgoland 2012

uk: Математика, природничі науки

description: Upogebia sp. (Crustacea, Malacostraca, Decapoda, Pleocyemata, Gebiidea, Upogebiidae), zoea larva, width of eyes 650 µm, Helgoland 07.2012. 0:29 min. Zoea larvae of Upogebia are often abundant around Helgoland. Big eyes and a broad telson with characteristic bristles are typical. Video can be used for teaching.

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keywords:
Crustacea
Cirripedia
Thoracica
Balanidae
Balanus sp.
cypris larva
Helgoland 2012

uk: Математика, природничі науки

description: Balanus sp. (Crustacea, Cirripedia, Thoracica, Balanidae), cypris larva, length 650 µm, Helgoland 07.2012. 0:40 min. The primary larva of Cirripedia is the nauplius larva. During the sixth moult the completely different cypris larva is formed. The body is enclosed between laterally shells, with one pair of antennae and six pairs of thoracopods. There is a nauplius eye and a pair of complex eyes. The cypris settles at the ground. Video can be used for teaching.

uk: вхід без авторизації

name: Balanus sp., cypris larva, Helgoland 2012


Bivalvia veliger larva 1 Helgoland 2012

keywords:
Mollusca
Bivalvia
Heterodonta
veliger
Helgoland 2012

uk: Математика, природничі науки

description: Undetermined veliger (Mollusca, Bivalvia, Heterodonta), diameter 250 mm, Helgoland 07.2012. 0:30 min. The body is enclosed between the two shells, velum with strong cilia, can be retracted. Velum up they swim through the water. Video can be used for teaching.

uk: вхід без авторизації


Bopyridae Helgoland 2012

keywords:
Crustacea
Malacostraca
Peracarida
Isopoda
Epicaridea
Bopyridae
Helgoland 2012

uk: Математика, природничі науки

description: The body is enclosed between the two shells, velum with strong cilia, can be retracted. Velum up they swim through the water. Video can be used for teaching.

uk: вхід без авторизації


Branchiostoma larva Helgoland 2012

keywords:
Acrania
Cephalochordata
Branchiostoma larva
Helgoland 2012

uk: Математика, природничі науки

description: Branchiostoma lanceolatum (Acrania, Cephalochordata), body length 4.2 mm, Helgoland 07.2012. 1:13 min. Branchiostoma (earlier Amphioxus) lives in special sandy sediments. Their eggs develop planktonic larvae, demonstrating the whole development of the body plan of this special taxon. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Echinodermata
Echinoida
Spatangoida
Loveniidae
Echinocardium cordatum
end of metamorphosis
Helgoland 2013

uk: Математика, природничі науки

description: Echinocardium cordatum (Echinodermata, Echinoida, Spatangoida, Loveniidae), end of metamorphosis, diameter 500 µm, Helgoland 07.2013. 1:26 min. The complex metamorphosis ends into a compact rounded body of the early sea urchin, still containing last remains of the larval skeleton and the first ambulacral feet. Video can be used for teaching.

uk: вхід без авторизації

name: Echinocardium cordatum, end of metamorphosis 1 Helgoland 2013


keywords:
Echinodermata
Echinoida
Spatangoida
Loveniidae
Echinocardium cordatum
pluteus larva
Helgoland 2013

uk: Математика, природничі науки

description: Echinocardium cordatum (Echinodermata, Echinoida, Spatangoida, Loveniidae), late pluteus larva, length 1.5 mm, Helgoland 07.2013. 1:01 min. Nearly fully developed pluteus with characteristic arrangement of arms, stabilized by skeletal rods, this species with unpaired posteriorly and paired horizontal projections. Video can be used for teaching.

uk: вхід без авторизації

name: Echinocardium cordatum, late pluteus 1.5 mm Helgoland 2013


uk: Математика, природничі науки

description: Echinocardium cordatum (Echinodermata, Echinoida, Spatangoida, Loveniidae), late pluteus larva, length 1.6 mm, Helgoland 07.2013. 0:29 min. Fully developed pluteus with characteristic arrangement of arms, stabilized by skeletal rods, this species with unpaired posteriorly and paired horizontal projections. Video can be used for teaching.

uk: вхід без авторизації

name: Echinocardium cordatum, late pluteus 1.6 mm Helgoland 2013


Evadne nordmanni Helgoland 2013

uk: Математика, природничі науки

description: Evadne nordmanni (Crustacea, Branchiopoda, Onychopoda, Cladocera, Podonidae), length 900 µm, Helgoland 07.2013. 0:33 min. There are only a few species of Cladocera in the marine environment, main genera are Podon and Evadne, the female of the latter have a pointed wide carapace, forming the brood chamber for the eggs which often becomes cumbersome. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Mollusca
Gastropoda
Lamellariidae
Lamellaria sp.
echinospira larva
Helgoland 2013

uk: Математика, природничі науки

description: Lamellaria sp. Mollusca, Gastropoda, Lamellariidae, echinospira larva, length 850 µm, Helgoland 07.2013. 1:34 min. The echinospira larva is rare among marine gastropods. The characteristic scaphoconch may reach 4 mm in diameter and is a transparent outer shell with distinct sculptures, formed by the mantle and composed of conchiolin. The entire body can be retracted into this shell. Video can be used for teaching

uk: вхід без авторизації

name: Lamellaria sp. echinospira larva 1 Helgoland 2013


Lanice very early larva Helgoland 2013

keywords:
“Polychaeta”
Terebellida
Terebellidae
Lanice conchilega
early aulophora larva I
Helgoland 2013

uk: Математика, природничі науки

description: Lanice conchilega (“Polychaeta”, Terebellida, Terebellidae), early aulophora larva I, length of tube 480 µm, Helgoland 07.2013. 1:24 min. The unique development of Lanice conchilega leads to an early larva, which settles for shortly at the bottom, then forming a tube and starting a second planktonic life as aulophora with 3 stages. The transparent tube, open at both ends, is often covered by mud and small particles. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Echinodermata
Ophiuroida
Ophiuroidae
Ophiura albida
early pluteus larva
Helgoland 2013

uk: Математика, природничі науки

description: Ophiura albida (Echinodermata, Ophiuroida, Ophiuroidae), early pluteus larva, width 550 µm, Helgoland 07.2013. 0:45 min. Small pluteus with only two pairs of arms, coelom not visible developed. Video can be used for teaching.

uk: вхід без авторизації

name: Ophiura albida early pluteus 550 µm Helgoland 2013


keywords:
Echinodermata
Ophiuroida
Ophiuroidae
Ophiura albida
late pluteus larva
Helgoland 2013

uk: Математика, природничі науки

description: Ophiura albida (Echinodermata, Ophiuroida, Ophiuroidae), late pluteus larva, width 700 µm, Helgoland 07.2013. 0:40 min. Development of Ophiuroida is characterized by the ophiopluteus larva with mainly four and up to six pairs of arms, stabilized by delicate calcite rods. Anchoring body rods and additional transvers rods of a species-specific arrangement connect these skeletal elements. From the coelomic cavities the five pouches of the hydrocoel on the left side are prominent. Ciliary bands around the mouth and on the arms propel the plutei through the water. Video can be used for teaching.

uk: вхід без авторизації

name: Ophiura albida late pluteus 700 µm Helgoland 2013


keywords:
Echinodermata
Ophiuroida
Ophiuroidae
Ophiura albida
end of metamorphosis
Helgoland 2013

uk: Математика, природничі науки

description: Ophiura albida (Echinodermata, Ophiuroida, Ophiuroidae), end of metamorphosis, diameter 900 µm, Helgoland 07.2013. 0:30 min. At the end of metamorphosis all remains of the pluteus had disappeared and a small brittle star with short arms has formed. Video can be used for teaching.

uk: вхід без авторизації

name: Ophiura albida metamorphosis 900 µm Helgoland 2013


keywords:
“Polychaeta”
Oweniidae
Owenia fusiformis
mitraria larva
Helgoland 2013

uk: Математика, природничі науки

description: Owenia fusiformis (“Polychaeta”, Oweniidae), mitraria larva, diameter 480 µm, Helgoland 07.2013. 1:11 min. Owenia fusiformis is a cosmopolitan polychaete developing a special trochophore, the mitraria with a helmet-like episphere and a prototroch folded into a sinuous band has developed. Video can be used for teaching.

uk: вхід без авторизації

name: Owenia fusiformis mitraria larve 1 Helgoland 2013


Bougainvillia sp. 1 Helgoland 2013

keywords:
Cnidaria
Hydrozoa
Hydroidomedusae
Anthomedusae
Bougainvillidae
Bougainvillea sp. medusa
Helgoland 2013

uk: Математика, природничі науки

description: Bougainvillea sp. (Cnidaria, Hydrozoa, Hydroidomedusae, Anthomedusae, Bougainvillidae), medusa, diameter 920 µm, Helgoland 07.2013. 0:32 min. Early stage of this hydromedusa, diameter 920 µm. Medusa can reach 1.5 mm in diameter. 4 clusters of marginal tentacles, short manubrium with 4 dichotomously branches tentacles. Video can be used for teaching.

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keywords:
Teleostei
Pleuronectiformes
Soleidae
Buglossidium luteum
larva before metamorphosis
Helgoland 2013

uk: Математика, природничі науки

description: Buglossidium luteum (Teleostei, Pleuronectiformes, Soleidae), larva before metamorphosis, length 9 mm, Helgoland 07.2013. 1:11 min. Postlarva, with distinct chromatophores in yellow (xanthophores) and black (melanophores), yolksac reduces, eyes and statocysts well developed. Video can be used for teaching.

uk: вхід без авторизації

name: Buglossidium luteum, larva 1 Helgoland 2013


Callionymus lyra egg 1 Helgoland 2013

keywords:
Teleostei
Syngnathiformes
Callionymidae
Callionymus lyra
developing egg
Helgoland 2013

uk: Математика, природничі науки

description: Callionymus lyra (Teleostei, Syngnathiformes, Callionymidae), developing egg, diameter 720 µm, Helgoland 07.2013. 0:33 min. Egg shell of Callionymus with a characteristic polygonal reticulated pattern. Yolksac still big after hatching. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Crustacea
Malacostraca
Pleocyemata
Decapoda
Brachyura
Portunidae
Carcinus maenas
zoea larva
Helgoland 2013

uk: Математика, природничі науки

description: Carcinus maenas (Crustacea, Malacostraca, Pleocyemata, Decapoda, Brachyura, Portunidae), zoea larva, length 1.4 mm, Helgoland 07.2013. 0:42 min. Zoea is the typical larva of Decapoda, in Brachyura they mostly possess a long anterior-ventral or frontal spine (rostrum) and dorsal one. The heart activity is obvious. Video can be used for teaching.

uk: вхід без авторизації

name: Carcinus maenas, zoea larva, Helgoland 2013


Corymorpha nutans 1 Helgoland 2013

keywords:
Cnidaria
Hydrozoa
Hydroidomedusae
Anthomedusae
Corymorphidae
Corymorpha nutans
Helgoland 2013

uk: Математика, природничі науки

description: Corymorpha nutans (Cnidaria, Hydrozoa, Hydroidomedusae, Anthomedusae, Corymorphidae), medusa, diameter 1.7 mm, Helgoland 07.2013. 0:34 min. Umbrella bell shaped, twice as high as wide, with apical process, with apical canal. 4 radial canals, gonads around manubrium. Characteristic: only one single tentacle on prominent bulb, the three other bulbs without tentacles. Max. hight 6 mm. Video can be used for teaching.

uk: вхід без авторизації


uk: Математика, природничі науки

description: Echinocardium cordatum (Echinodermata, Echinoida, Spatangoida, Loveniidae), medium pluteus larva, length 1.1 mm, Helgoland 07.2013. 1:12: min. Medium developed pluteus with arrangement of only 3 pairs arms and long unpaired terminal process, all stabilized by fenestrated skeletal rods. Pattern of chromatophores. Video can be used for teaching

uk: вхід без авторизації

name: Echinocardium cordatum, medium pluteus 1.1 mm Helgoland 2013


uk: Математика, природничі науки

description: Echinocardium cordatum (Echinodermata, Echinoida, Spatangoida, Loveniidae), early pluteus larva, length 0.9 mm, Helgoland 07.2013. 0:40 min. Early pluteus with only 2 pairs of arms and long unpaired terminal process, all stabilized by fenestrated skeletal rods. Video can be used for teaching.

uk: вхід без авторизації

name: Echinocardium cordatum, early pluteus 0.9 mm Helgoland 2013


Lanice conchilega Helgoland 2014

keywords:
"Polychaeta"
Terebellida
Terebellidae
Lanice conchilega
aulophora II
Helgoland 2014

uk: Математика, природничі науки

description: Lanice conchilega ("Polychaeta", Terebellida, Terebellidae), early aulophora II, length 350 µm, Helgoland 08.2014. 1:01 min. The unique development of Lanice conchilega leads to an early larva, which settles for shortly at the bottom, then forming a tube and starting a second planktonic life as aulophora with three stages. The transparent tube, open at both ends, is often covered by mud and small particles. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Cnidaria
Hydrozoa
Hydroidomedusae
Pandeidae
Leuckartiara octona
Helgoland 2014

uk: Математика, природничі науки

description: Leuckartiara octona (1) (Cnidaria, Hydrozoa, Hydroidomedusae, Pandeidae), diameter 1.2 mm, Helgoland 08.2014. 0:42 min. The bell of this species shows a apical projection. A square manubrium with horseshoe shaped gonads. Mouth with crenulated margin. Eight tentacles. Video can be used for teaching.

uk: вхід без авторизації

name: Leuckartiara octona 1.2 mm Helgoland 2014


uk: Математика, природничі науки

description: Leuckartiara octona (2) (Cnidaria, Hydrozoa, Hydroidomedusae, Pandeidae), diameter 2.2 mm, Helgoland 08.2014. 0:35 min. The bell of this species shows a apical projection. A square manubrium with horseshoe shaped gonads. Mouth with crenulated margin. Eight tentacles. Video can be used for teaching.

uk: вхід без авторизації

name: Leuckartiara octona 2.2 mm Helgoland 2014


keywords:
Nemertea
Nemertini
Heteronemertea
Lineidae
Lineus sp.
pilidium larva
Helgoland 2014

uk: Математика, природничі науки

description: Lineus albocinctus (Nemertea, Heteronemertea, Lineidae), pilidium larva, length 550 µm, Helgoland 08.2014. 1:10 min. The taxon Heteronemertea in the taxon Nemertea or Nemertini develops characteristic planktonic pilidium larve (pilidium: form of roman helmet) with fore-lobe like a baseball-cap and hind lobe, at each side lateral lobes, all equipped with ciliary bands. The mouth is located between these lobes. An apical plate near the top bears a tuft of long stiff cilia. Video can be used for teaching.

uk: вхід без авторизації

name: Lineus albocinctus pilidium Helgoland 2014


Magelona filiformis 1 Helgoland 2014

keywords:
"Polychaeta"
Spionida
Magelonidae
Magelona filiformis
Helgoland 2014

uk: Математика, природничі науки

description: Magelona filiformis (1) ("Polychaeta", Spionida, Magelonidae), length 1.1 mm, Helgoland 08.2014. 0:46 min. Magelona larvae are characterized by the pair of palps (length in correspondence to the age), provided with adhesive papillae and a bundle of very long chaeta at the first two segments. They feed especially on bivalve veliger. Video can be used for teaching.

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Magelona filiformis 2 Helgoland 2014

uk: Математика, природничі науки

description: Magelona filiformis (2) ("Polychaeta", Spionida, Magelonidae), length 1.1 mm, Helgoland 08.2014. 0:24 min. Magelona larvae are characterized by the pair of palps (length in correspondence to the age), provided with adhesive papillae and a bundle of very long chaeta at the first two segments. They feed especially on bivalve veliger. Video can be used for teaching.

uk: вхід без авторизації


keywords:
"Polychaeta"
Phyllodocida
Syllidae
Myrianida (Autolytus) prolifer
female with eggs
Helgoland 2014

uk: Математика, природничі науки

description: Myrianida (Autolytus) prolifer ("Polychaeta", Phyllodocida, Sylliidae), female with eggs, length 2.4 mm, Helgoland 08.2014. 1:00 min. The epithokous reproduction of Syllidae is famous. The female stolo releases fertilized eggs into a brood-pouch while drifting through the water. Video can be used for teaching.

uk: вхід без авторизації

name: Myrianida (Autolytus) prolifera Helgoland 2014


keywords:
Echinodermata
Ophiuroida
Ophiruridae
Ophiura albida
metamorphosis
Helgoland 2014

uk: Математика, природничі науки

description: Ophiura albida (Echinodermata, Ophiuroida, Ophiruridae), metamorphosis, diameter 300 µm, Helgoland 08.2014. 0:40 min. At the end of the pluteus stage the metamorphosis starts. The body of the brittle star is formed with a central part and five arms. The larval arms and other larval parts are resorbed. Video can be used for teaching.

uk: вхід без авторизації

name: Ophiura albida Metamorphosis Helgoland 2014


Penilia avirostris Helgoland 2014

keywords:
Crustacea
Ctenopoda
Sidiidae
Penilia avirostris
Helgoland 2014

uk: Математика, природничі науки

description: Penilia avirostris (Crustacea, Branchiopoda, Ctenopoda, Sidiidae), length 1.1 mm, Helgoland 08.2014. 0:49 min. There are only a few species of Cladocera in the marine environment, the Ctenopoda are mainly represented by Penilia avirostris. The carapace covers the body without the head which bears a pair of strong 2. antennae. The carpax is translucent and shows the sic pairs of limps. DIK illumination demonstrates the muscles. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Phoronida
Phoronis muelleri
actinotrocha larva
Hufeisenwurm
Helgoland 2014

uk: Математика, природничі науки

description: Phoronis muelleri (Phoronida), actinotrocha larva, Helgoland 08.2014. 1:00 min. The actinotrocha start with tiny forms about 50 µm in length which soon develop first tentacles becoming more numerous up to 48 in some species. Old larvae reach a length up to 1 mm. The mouth is hidden under a pre-oral lobe. Cilia on the tentacles and a heavily ciliated telotroch around the anus propel the larvae through the water. Different video-clips show different stages of development. Video can be used for teaching.

uk: вхід без авторизації

name: Phoronis muelleri, actinotrocha larva, Helgoland 2014


Pleurobrachia pileus Helgoland 2014

keywords:
Ctenophora
Tentaculifera
Cydippida
Pleurobrachiidae
Pleurobrachia pileus
Helgoland 2014

uk: Математика, природничі науки

description: Pleurobrachia pileus (Ctenophora, Tentaculifera, Cydippida, Pleurobrachiidae), diameter 8 mm, Helgoland 08.2014. 1:36 min. Pleurobrachia pileus may be abundant in the North Sea and the early stages as well. Under the microscope the entire body plan is visible. Video can be used for teaching.

uk: вхід без авторизації


Poecilochaetus sp. Helgoland 2014

keywords:
"Polychaeta"
Spionida
Poecilochaetidae
Poecilochaetus sp.
Helgoland 2014

uk: Математика, природничі науки

description: Poecilochaetus sp ("Polychaeta", Spionida, Poecilochaetidae), length 1.4 mm, Helgoland 08.2014. 0:13 min. Spionida with long planktonic period until more than 35 segments are developed. Stages with less segments swim by prototroch, telotroch ans gastrotrichs. Later with a length of up to 4.5 mm they swim by undulating the whole body. Lateral yellow (dark in transparent light) chromatophores are distinct. Video can be used for teaching.

uk: вхід без авторизації


Polygordius sp. Helgoland 2014

keywords:
"Polychaeta"
Polygordiida
Polygordiidae
Polygordius sp.
endo-larva
Helgoland 2014

uk: Математика, природничі науки

description: Polygordius sp. (“Polychaeta", Polygordiida, Polygordiidae), endo-larva, diameter 720 µm, Helgoland 08.2014. 1:15 min. Polygordiidae belong to the formerly called “archiannelida” with a very special larval development. One possibility is the endolarva, where the developing segments are folded inside the larval body. At metamorphosis they are everted. Video can be used for teaching.

uk: вхід без авторизації


keywords:
"Polychaeta"
Phyllodocida
Tomopteridae
Tomopteris septentrionalis
juvenile worm
Helgoland 08.2014

uk: Математика, природничі науки

description: Tomopteris septentrionalis ("Polychaeta", Phyllodocida, Tomopteridae), juvenile worm, length 1.3 mm, Helgoland 2014. 1:13 min. Tomopteridae belong to the holoplanctic polchaetes. They are completely transparent. Parapodia without chaeta. Video can be used for teaching.

uk: вхід без авторизації

name: Tomopteris septentrionalis Helgoland 2014


Anthozoa planula Helgoland 2014

keywords:
Cnidaria
Anthozoa
planula larva
Helgoland 2014

uk: Математика, природничі науки

description: Planula larva (Cnidaria, Anthozoa), length 520 µm, Helgoland 08.2014. 0:34 min. The planula is the typical larva of Cnidaria. In this specimen the pharynx and eight mesentheria are developed, the future mouth shows the beginning of tentacle formation. Video can be used for teaching.

uk: вхід без авторизації


Beroe cucumis Helgoland 2014

keywords:
Ctenophora
Atentaculata
Beroidae
Beroe cucumis
Helgoland 2014

uk: Математика, природничі науки

description: Beroe cucumis (Ctenophora, Atentaculata, Beroidae), early stage, length 13 mm, Helgoland 08.2014. 0:37 min. This early stage of demonstrates the eight comb rows. The aboral pole shows the statocyst surrounded by small lappets. Video can be used for teaching.

uk: вхід без авторизації


keywords:
"Polychaeta"
Chaetopteridae
Chaetopterus variopedatus
early larva
Helgoland 2014

uk: Математика, природничі науки

description: Chaetopterus variopedatus ("Polychaeta", Chaetopteridae), early larva, length 550 µm, Helgoland 08.2014. 0:30 min. This early larva of Chaetopterus variopedatus is very broad, with a big broad mouth with a lot of cilia and a round stomach. Video can be used for teaching.

uk: вхід без авторизації

name: Chaetopterus variopedatus Helgoland 2014


Coscinodiscus wailesi Helgoland 2014

keywords:
Bacillariophyceae
Coscinodicales
Coscinodiscaceae
Coscinodiscus wailesi
Helgoland 2014

uk: Математика, природничі науки

description: Coscinodiscus wailesi (Bacillariophyceae, Coscinodiscales, Coscinodis-caseae), diameter 380 µm, Helgoland 08.2014. 0:42 min C. wailesi is introduced from the Pacific since 1970. Cells may as high as wide. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Bacillariophyceae
Centrales
Coscinodiscophycidae
Coscinodicales
Coscinodiscaceae Coscinodiscus wailesi
Oomycota
Oomycete
Lagenisma coscinodisci
Helgoland 2014

uk: Математика, природничі науки

description: Coscinodiscus wailesi, (Bacillariophyceae, Centrales, Coscinodis- cophycidae, Coscinodiscales, Coscinodiscaceae), with the oomycete Lagenisma coscinodisci, diameter 380 µm, Helgoland 08.2014. 0:57 min. Coscinodiscus species can be affected by parasitic organisms, e.g. oomycetes. Lagenisma coscinodisci was recently described. Video can be used for teaching.

uk: вхід без авторизації

name: Coscinodiscus with Lagenisma 3 Helgoland 2014


keywords:
Echinodermata
Echinoida
Spatangoida
Loveniidae
Echinocardium cordatum
late pluteus
Helgoland 2014

uk: Математика, природничі науки

description: Echinocardium cordatum, (Echinodermata, Echinoida, Spatangoida, Loveniidae), late pluteus, width 1.55 mm, Helgoland 08.2014. 0:22 min. Nearly fully developed pluteus with characteristic arrangement of arms, stabilized by skeletal rods, this species with unpaired posteriorly and paired horizontal projections. Video can be used for teaching.

uk: вхід без авторизації

name: Echinocardium cordatum late pluteus 1,55 mm Helgoland 2014


Eutima gracilis Helgoland 2014

keywords:
Cnidaria
Hydrozoa
Leptomedusae
Eirenidae
Eutima gracilis
Helgoland 2014

uk: Математика, природничі науки

description: Eutima gracilis, (Cnidaria, Hydrozoa, Leptomedusae, Eirenidae), diameter 7 mm, Helgoland 2014. 0:26 min. This species is characterized by the long manubrium, jut out of the flat umbrella. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Bacillariophyceae
Coscinodiscophycidae
Coscinodiscales
Coscinodiscaceae
Coscinodiscus concinnus
Thalsiiosirales
Thalssiosiraceae
Thalassiosira sp.
Helgoland 2015

uk: Математика, природничі науки

description: Coscinodiscus concinnus (Bacillariophyceae, Coscinodiscophycidae, Coscinodiscales, Coscinodiscaceae), empty frustule, diameter 230 µm, inside Thalassiosira sp., 80 µm in diameter, Helgoland 04.2015. 0:36 min. Empty frustule of C. concinnus. Inside some Thalassiosira sp. cells. Video can be used for teaching.

uk: вхід без авторизації

name: Coscinodiscus concinnus frustule Helgoland 2015


Coscinodiscus concinnus Helgoland 2015

keywords:
Bacillariophyceae
Coscinodiscophycidae
Coscinodiscales
Coscinodiscaceae
Coscinodiscus concinnus
Helgoland 2015

uk: Математика, природничі науки

description: Coscinodiscus concinnus (Bacillariophyceae, Coscinodiscophycidae, Coscinodiscales, Coscinodiscaceae), diameter 230 µm, Helgoland 04.2015. 0:37 min. C. concinnus cells are often drum shaped, in the girdle view rounded. They may reach 500 µm in diameter. Video can be used for teaching.

uk: вхід без авторизації


Coscinodiscus wailesii Helgoland 2015

keywords:
Bacillariophyceae
Coscinodiscophycidae
Coscinodiscales
Coscinodiscaceae
Coscinodiscus wailesii
Helgoland 2015

uk: Математика, природничі науки

description: Coscinodiscus wailesii (Bacillariophyceae, Coscinodiscophycidae, Coscinodiscales, Coscinodiscaceae), diameter 370 and 240 µm, Helgoland 04.2015. 0:17 min. In. C. wailesii cells are often as wide as high. They originate from the Pacific and occur around Helgoland since the 1970th. Video can be used for teaching.

uk: вхід без авторизації


Ditylum brightwelli Helgoland 2015

keywords:
Bacillariophyceae
Coscinodiscophycidae
Lithodesmiales
Lithodesmiaceae
Ditylum brightwelli
Helgoland 2015

uk: Математика, природничі науки

description: Ditylum brightwelli (Bacillariophyceae, Coscinodiscophycidae, Lithodesmiales, Lithodesmiaceae), diameter 26 µm, Helgoland 04.2015. 0:21 min. The solitary cylindrical cells (frustules) of this species reach 100 µm in length. With long hollow processes in each half of the valves, surrounded by delicate spines at the rim. Numerous small chloroplasts. Video can be used for teaching.

uk: вхід без авторизації


Mediopyxis helysia Helgoland 2015

keywords:
Bacillariophyceae
incerta sedis
Mediopyxis helysia
Helgoland 2015

uk: Математика, природничі науки

description: Mediopyxis helysia (Bacillariophyceae, incerta sedis), width of cells 110 µm, Helgoland 04.2015. 0:15 min. This species was recorded near Helgoland the first time in 2003, now sometimes abundant. Solitary or short chains, with gaps between adjacent cells. Morphologically variable. Video can be used for teaching.

uk: вхід без авторизації


Odontella sinensis Helgoland 2015

keywords:
Bacillariophyceae
Mediophyceae
Eupodiscales
Odontellaceae
Odontella sinensis
Helgoland 2015

uk: Математика, природничі науки

description: Odontella sinensis (Bacillariophyceae, Mediophyceae, Eupodiscales, Odontellaceae), after cell division, width 45 µm, Helgoland 04.2015. 0:13 min. The cushion-like cells, up to 400 µm in length, form chains. At each corner of these cells a blunt process and a long spine is situated. The blunt processes of two cells touch each other, and the spines cross each other, stabilizing the chain. The species may occur in dense blooms. Video can be used for teaching.

uk: вхід без авторизації


Phyllodocidae larva Helgoland 2015

keywords:
"Polychaeta"
Phyllodocidae
larva
Helgoland 2015.

uk: Математика, природничі науки

description: "Polychaeta", Phyllodocidae, undetermined species, larva, length 820 µm, Helgoland 04.2015. 0:20 min. Phyllodocid polychaetes belong to a taxon with numerous homonomously segmented species. Embryonic development ends with a compact trochophora larva, soon developing numerous segments. A strong prototroch propels the larva through the water. Video can be used for teaching.

uk: вхід без авторизації


Synchaeta sp. Helgoland 2015

keywords:
“Rotifera“
Rotatoria
Synchaetidae
Synchaeta sp.
Helgoland 2015

uk: Математика, природничі науки

description: Synchaeta sp. (“Rotifera“, Rotatoria, Synchaetidae), length 400 µm, Helgoland 04.2015. 0:35 min. Though Rotatoria are mostly limnetic, several occur in the marine environment, Synchaeta being a common genus. They are a very motile part of the plankton community and sometimes numerous. The transparent body shows most of the internal organs, e.g. the big eggs. The naming ciliary organ forms ear shaped lobes, four stiff sensory structures are positioned on the apical field. Video can be used for teaching.

uk: вхід без авторизації


Teleostei egg Helgoland 2015

keywords:
Teleostei
undetermined species
developing egg
Helgoland 2015

uk: Математика, природничі науки

description: Teleostei, undetermined species, developing egg, diameter 830 µm, Helgoland 04.2015. 1:16 min. Typical teleost egg with embryo, first forming a germ band which differentiates into the parts of the head with prominent eyes etc. and somites in the trunk region. Video can be used for teaching.

uk: вхід без авторизації


Antipatula Helgoland 2015

keywords:
Cnidaria
Anthozoa
antipathula larva
Helgoland 2015

uk: Математика, природничі науки

description: Cnidaria, Anthozoa, antipathula larva, width 2.8 mm, Helgoland 04.2015. 0:20 min. Antipathula is a specialized larva of the tube anemones, developing from the planula. Inside three pairs of septae develop and four tentacles surrounding the mouth. Later on more septae and tentacles develop to form the so-called cerinula. This larva settle on the ground, forming a tube in which the sea anemone can be retracted. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Echinodermata
Asteroida
Forcipulatida
Asteridae
Asterias rubens
bipinnaria
brachiolaria
Helgoland 2015

uk: Математика, природничі науки

description: Asterias rubens (Echinodermata, Asteroida, Forcipulatida, Asteridae), bipinnaria and brachiolaria larva, length up to 2 mm, Helgoland 04.2015. 1:04 min. The late bipinnaria changes successive into the brachiolaria which undergoes metamorphosis in the future starfish. The formation of the future body starts at the right side of the brachiolaria, influenced by the developing coeloms. First ossicles differentiate in the body wall. Video can be used for teaching.

uk: вхід без авторизації

name: Asterias rubens, brachiolaria, metamorphosis 1 Helgoland 2015


keywords:
Echinodermata
Asteroida
Forcipulatida
Asteridae
Asterias rubens
dipleurula larva
Helgoland 2015

uk: Математика, природничі науки

description: Asterias rubens (Echinodermata, Asteroida, Forcipulatida, Asteridae), dipleurula larva, hight 360 µm, Helgoland 04.2015. 1:26 min. Asteroida pass dipleurula, bipinnaria and brachiolaria stages before they change their whole construction during metamorphosis. Before the dipleurula is formed gastrulation takes place. In this coelogastrula an invagination of the vegetative pole forms the gut which develops a pair of coelomic cavities from which pairs of axo-, hydro, and somatocoels differentiate. The bipinnaria develops continuously from the dipleurula and the appearance of gut and coelomic structures can be observed in the complete transparent larvae. Video can be used for teaching.

uk: вхід без авторизації

name: Asterias rubens, dipleurula Helgoland 2015


Balanus balanus Helgoland 2015

keywords:
Crustacea
Cirripedia
Thoracica
Balanomorpha
Balanidae
Balanus balanus
Helgoland 2015

uk: Математика, природничі науки

description: Balanus balanus (Crustacea, Cirripedia, Thoracica, Balanomorpha, Balanidae), diameter ca. 1 cm, Helgoland 04.2015. 0:17 min. Balanus balanus is one species of barnacles, sessile crustaceans with planktonic larvae. They are hidden inside a calcareous shell of different plates. Specialized arms can filter planktonic food. Video can be used for teaching.

uk: вхід без авторизації


Calanidae nauplius 1 Helgoland 2015

keywords:
Crustacea
Copepoda
Calanidae
nauplius larva
Helgoland 2015

uk: Математика, природничі науки

description: Nauplius larva (Crustacea, Copepoda, Calanidae), length of body 240 µm, Helgoland 04.2015. 0:25 min. Most Copepoda begin their life with a nauplius larva. There are six naupliar stages. The first stage possesses three pairs of limps: first (uniramous) and second antenna and mandible (both biramous). Characteristic is the medial unpaired nauplius eye. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Nemertea
Nemertini
Palaeonemertea
Cephalothricidae
Cephalothrix sp.
pilidium larva
Helgoland 2015

uk: Математика, природничі науки

description: Cephalothrix sp. (Nemertea, Palaeonemertea, Cephalothricidae), pilidium larva, hight 400 µm, Helgoland 04.2015. 0:31 min. The taxon Heteronemertea in the taxon Nemertea or Nemertini develops characteristic planktonic pilidium larva (pilidium: form of roman helmet) with fore-lobe like a baseball-cap and hind-lobe, at each side lateral lobes, all equipped with ciliary bands. The mouth is located between these lobes. An apical plate near the top bears a tuft of long stiff cilia. Video can be used for teaching.

uk: вхід без авторизації


Chaetoceros socialis Helgoland 2015

keywords:
Bacillariophyceae
Chaetocerotaceae
Chaetoceros socialis
Helgoland 2015

uk: Математика, природничі науки

description: Chaetoceros socialis (Bacillariophyceae, Chaetocerotaceae), diameter 600 µm, Helgoland 04.2015. 0:30 min. Chaetoceros is a genus with more than 400 species inside the Bacillaryophyceae, which form chains of cells, called frustules, equipped with two or more long and thin setae. Frustules form long chains. In Chaetoceros socialis frustules are comparatively small (large diameter 2-15 µm, small diameter 2-10 µm) and the short chains are embedded in in a gelatinous mass, reaching more than 1 mm in diameter. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Cnidaria
Hydrozoa
Anthoathecata (= Anthomedusa)
Tubulariidae
Ectopleura sp.
proactinula larva
Helgoland 2011

uk: Математика, природничі науки

description: Ectopleura sp. (Cnidaria, Hydrozoa, Anthoathecata (= Anthomedusa), Tubulariidae), proactinula larva, diameter with tentacles 800 µm, Helgoland 08.2011. 0:46 min. Many cnidarian show a larval development by planula larvae. Besides these special larvae occur like the shown proactinula, which possess two rings of tentacles and develop to thy polyp generation. They live only for a short period as plankton organisms. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Qualitätsmanagement
Metaebene
Qualitätssicherung
Bildungsorganisation
Instrument
Optimierung
Kontrolle
Steuerung
Bildungsprozesse
Erfolgsfaktoren
Zufriedenheit
Verbesserung
PDCA-Zyklus
kontinuierlicher Verbesserungsprozess
Analyse

uk: Бізнес та економіка

uk: Педагогічні науки

uk: Право, економіка та суспільні науки

description: Das Video gibt Einblicke in die Besonderheiten von Bildungsorganisationen und erläutert die Funktionen von Qualitätsmanagement.

uk: вхід без авторизації

name: Qualitätsmanagement in Bildungsorganisationen: Eine organisationstheoretische Perspektive

name: Carl von Ossietzky Universität Oldenburg


Copepod egg Helgoland 2018

keywords:
Crustacea
Copepoda
Calanoida
Centropagidae egg
Helgoland 2018

uk: Математика, природничі науки

description: Crustacea, Copepoda, Calanoida, Centropagidae, egg, diameter 90 µm, Helgoland 06.2018. 0:17 min. Many copepods have eggsacs, other leave their eggs into the water column. Centropagidae eggs possess typical spines on the surface. Video can be used for teaching.

uk: вхід без авторизації


Coscinodiscus wailesi Helgoland 2018

keywords:
Bacillariophyceae
Coscinodiscophycidae
Coscinodiscales
Coscinodiscaceae
Coscinodiscus wailesi
Helgoland 2018

uk: Математика, природничі науки

description: Coscinodiscus wailesi (Bacillariophyceae, Coscinodiscophycidae, Coscinodiscales, Coscinodiscaceae), diameter 90 mm, Helgoland 06.2018. 0:21 min. In C. wailesii cells are often as wide as high. They originate from the Pacific and occur around Helgoland since the 1970th. Video can be used for teaching.

uk: вхід без авторизації


Noctiluca miliaris Helgoland 2018

keywords:
Dinoflagellata
Dinophyceae
Noctilucales
Noctilucaceae
Noctiluca scintillans
Helgoland 2018

uk: Математика, природничі науки

description: Noctiluca scintillans (Dinoflagellata, Dinophyceae, Noctilucales, Noctilucaceae), diameter 450 µm, Helgoland 06.2018. 0:38 min. Popular plankton organisms with bladder-shaped, naked cells, 400 – 800 µm in diameter and transparent. The ingested food often can be determined, e.g. diatoms. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Echinodermata
Ophiuroida
Ophiuridae
Ophiura albida
pluteus larva
width 800 µm
Helgoland 2018

uk: Математика, природничі науки

description: Ophiura albida (Echinodermata, Ophiuroida, Ophiuridae), late pluteus larva, width 800 µm and metamorphosis, Helgoland 06.2018. 0:53 min. A late pluteus of Ophiura albida demonstrates the arrangement of arms and the start of coelomic development. Remains of the pluteus on a young brittle star and a separate one are shown. Video can be used for teaching.

uk: вхід без авторизації

name: Ophiura albida late pluteus Helgoland 2018


keywords:
Phoronida
Phoronis muelleri
actinotrocha larva
Hufeisenwurm
Helgoland 2019

uk: Математика, природничі науки

description: Phoronis muelleri (Phoronida), actinotrocha larva, telotroch and tentacles, Helgoland 06.2019. 0:48 min. Phoronis sp. starts planktonic life with tiny forms about 50 µm in length which soon develops first tentacles becoming more numerous up to 48 in some species. Old larvae reach a length of more than 1 mm. The mouth is hidden under a pre-oral lobe. Cilia on the tentacles and a heavily ciliated telotroch around the anus propel the larvae through the water. Different video-clips show different stages of development. Video can be used for teaching.

uk: вхід без авторизації

name: Phoronis muelleri, actinotrocha larva, Helgoland 2019


keywords:
Dinoflagellata
Peridiniales
Protoperidiniaceae
Protperidinium sp.
Helgoland 2018

uk: Математика, природничі науки

description: Protoperidinium sp. (Dinoflagellata, Peridiniales, Protoperidiniaceae), diameter 60 µm, Helgoland 06.2018. 0:19 min. Protoperidinium is a big genus with variable species. This species shows rich red chromatophores. The surface is covered by a complex pattern of plates (tabulation). This is not easy to recognize under the light microscope. Video can be used for teaching.

uk: вхід без авторизації

name: Protoperidinium depressum Helgoland 2018


keywords:
Phoronida
Phoronis muelleri
actinotrocha larva
Hufeisenwurm
Helgoland 2012

uk: Математика, природничі науки

description: Phoronis muelleri, actinotrocha larva, Helgoland 07.2012. 1:09 min. The phoronids larvae start with tiny forms about 50 µm in length which soon develops first tentacles becoming more numerous up to 48 in some species. Old larvae reach a length up to 1 mm. The mouth is hidden under a pre-oral lobe. Cilia on the tentacles and a heavily ciliated telotroch around the anus propel the larvae through the water. Video can be used for teaching

uk: вхід без авторизації

name: Phoronis muelleri, actinotrocha larva, Helgoland 2012


Gastropoda Veliger Helgoland 2016

keywords:
Mollusca
Gastropoda
veliger larva
Helgoland 2016

uk: Математика, природничі науки

description: Mollusca, Gastropoda, undetermined species, veliger larva, length 180 µm, Helgoland 03.2016. 0:20 min. The veliger larva resembles a small snail with the velum as a special organ for swimming through the water. Statocysts are well developed in this early stage. Video can be used for teaching.

uk: вхід без авторизації


Magelona filiformis Helgoland 2016

keywords:
"Polychaeta"
Spionida
Magelonidae
Magelona filiformis
Helgoland 2016

uk: Математика, природничі науки

description: Magelona filiformis ("Polychaeta", Spionida, Magelonidae), length 1.8 mm, Helgoland 03.2016. 2:34 min. The Magelonidae in the taxon Spionida contain bentic surface feeders, using a pair of prominent palps to collect the food. During their planktonic larval period the larval palps are also characteristic, reaching more than body length of up to 4 mm. They prey especially on bivalve veligers. Video can be used for teaching.

uk: вхід без авторизації


Ophiura albida pluteus Helgoland 2016

keywords:
Echinodermata
Ophiuroid
Ophiuroidae
Ophiura albida
pluteus larva
Helgoland 2016

uk: Математика, природничі науки

description: Ophiura albida (Echinodermata, Ophiuroid, Ophiuroidae), pluteus larva, width 1.05 mm, Helgoland 03.2016. 0:50 min. Development of Ophiuroida is characterized by the ophiopluteus larva with mainly four and up to six pairs of arms, stabilized by delicate calcite rods. Anchoring body rods and additional transvers rods of a species-specific arrangement connect these skeletal elements. From the coelomic cavities the five pouches of the hydrocoel on the left side are prominent. Ciliary bands around the mouth and on the arms propel the plutei through the water. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Echinodermata
Ophiuroida
Ophiuridae
Ophiura texturata
pluteus larva
Helgoland 2016

uk: Математика, природничі науки

description: Ophiura texturata (Echinodermata, Ophiuroida, Ophiuridae), pluteus larva, width 730 µm, Helgoland 03.2016. 1:17 min. Development of Ophiuroida is characterized by the ophiopluteus larva with mainly four and up to six pairs of arms, stabilized by delicate calcite rods. Anchoring body rods and additional transvers rods of a species-specific arrangement connect these skeletal elements. Ciliary bands around the mouth and on the arms propel the plutei through the water. Video can be used for teaching.

uk: вхід без авторизації

name: Ophiura texturata pluteus Helgoland 2016


Pagurus bernhardus zoea Helgoland 2016

keywords:
Crustacea
Malacostraca
Decapoda
Pleocyemata
Anomura
Paguridae
Pagurus bernhardus
zoea larva
Helgoland 2016

uk: Математика, природничі науки

description: Pagurus bernhardus (Crustacea, Malacostraca, Decapoda, Pleocyemata, Anomura, Paguridae), zoea larva, length 2.8 mm, Helgoland 03.2016. 0:24 min. Pagurus bernhardus has a slender zoea larva, here seen from the lateral side, demonstrating the carapax spines. The lack of legs is obvious as well as the big complex eyes and the beating heart. Video can be used for teaching.

uk: вхід без авторизації


keywords:
"Polychaeta"
Phyllodocida
meta-trochophora
Helgoland 2016

uk: Математика, природничі науки

description: "Polychaeta", Phyllodocida, undetermined species, meta-trochophora, frontal view, length 750 µm, Helgoland 03.2016. 0:23 min. Phyllodocid polychetes belong to a taxon with numerous homonomously segmented species. Embryonic development ends with a compact trochophora larva, soon developing numerous segments. A strong prototroch and a telotroch propels the larva through the water. The mouth is very broad, in the cells you observe a lot of oil droplets. Video can be used for teaching.

uk: вхід без авторизації

name: Phyllodocidae meta-trochophora Helgoland 2016


Pleurobrachia pileus Helgoland 2016

keywords:
Ctenophora
Tentaculifera
Cydippida
Pleurobrachiidae
Pleurobrachia pileus
Helgoland 2016

uk: Математика, природничі науки

description: Pleurobrachia pileus (Ctenophora, Tentaculifera, Cydippida, Pleurobrachiidae), diameter 3.2 mm, Helgoland 03.2016. 0:28 min. Pleurobrachia pileus may be abundant in the North Sea and the early stages as well. Under the microscope the whole body plan is visible. Video can be used for teaching.

uk: вхід без авторизації


Podocoryne carnea Helgoland 2016

keywords:
Cnidaria
Hydrozoa
Hydroidomedusa
Anthomedusae
Hydractiniidae
Podocoryne carnea
Helgoland 2016

uk: Математика, природничі науки

description: Podocoryne carnea (Cnidaria, Hydrozoa, Hydroidomedusa, Anthomedusae, Hydractiniidae), diameter 1.5 mm, Helgoland 03.2016. 0:20 min. Larval spionids can be observed all year round. The agile larvae move by their prototroch and telotroch. They often spread their segmental chaetae. Paired eyes on the prostomium and specific pattern of chromatophores on the segments distinguish the species. Video can be used for teaching.

uk: вхід без авторизації


Polydora sp. Helgoland 2016

keywords:
"Polychaeta"
Spionida
Spionidae
Polydora sp.
Helgoland 2016

uk: Математика, природничі науки

description: Polydora sp. ("Polychaeta", Spionida, Spionidae), length 530 µm, Helgoland 03.2016. 0:29 min. Larval spionids can be observed all year round. The agile larvae move by their prototroch and telotroch. They often spread their segmental chaetae. Paired eyes on the prostomium and specific pattern of chromatophores on the segments distinguish the species. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Echinodermata
Asteroida
Forcipulatida
Asteridae
Asterias rubens
early starfish
Helgoland 2018

uk: Математика, природничі науки

description: Asterias rubens (Echinodermata, Asteroida, Forcipulatida, Asteridae), early starfish, diameter 750 µm, Helgoland 06.2018. 0:54 min. Starfish after metamorphosis are no true planktonic organisms, but taking samples near the shore they are not rare. They are very compact in respect to brittle stars of the same total diameter. Video can be used for teaching.

uk: вхід без авторизації

name: Asterias rubens, early starfish Helgoland 2018


Buglossidium luteum Helgoland 2016

keywords:
Teleostei
Acanthopterygiim
Pleuronectiformes
Soleidae
Buglossidium luteum
larva
Helgoland 2016

uk: Математика, природничі науки

description: Buglossidium luteum (Teleostei, Acanthopterygii, Pleuronectiformes, Soleidae), larva, length 5.5 mm, Helgoland 03.2016. 0:52 min. Many of the marine fishes produce transparent pelagic eggs, often about 1 mm in diameter. This enables observation of developmental processes in living specimen. They hatch as still transparent larvae which often show colourful pattern of chromatophores. This still bilaterally symmetric Buglossidium luteum soon undergoes strong metamorphosis as a flatfish. Video can be used for teaching.

uk: вхід без авторизації


Ditylum brightwelli Helgoland 2016

keywords:
Bacillariophyceae
Coscinodiscophycidae
Lithodesmiales
Lithodesmiaceae
Ditylum brightwelli
Helgoland 2016

uk: Математика, природничі науки

description: Ditylum brightwelli (Bacillariophyceae, Coscinodiscophycidae, Lithodesmiales, Lithodesmiaceae), diameter 55 µm, Helgoland 03.2016. 0:31 min. The solitary cylindrical cells (frustules) of this species reach 100 µm in length. With long hollow processes in each half of the valves, surrounded by delicate spines at the rim. Numerous small chloroplasts. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Echinodermata
Echinoida
Spatangoida
Loveniidae
Echinocardium cordatum
pluteus larva
Helgoland 2016

uk: Математика, природничі науки

description: Echinocardium cordatum (Echinodermata, Echinoida, Spatangoida, Loveniidae), pluteus larva, medium stage, length 820 µm, Helgoland 03.2016. 0,51 min. Medium developed pluteus with arrangement of only 3 pairs arms and long unpaired terminal process, all stabilized by fenestrated skeletal rods. Pattern of chromatophores. Video can be used for teaching.

uk: вхід без авторизації

name: Echinocardium cordatum medium pluteus Helgoland 2016


Gadus morrhua Helgoland 2017

keywords:
Teleostei
Gadiformes
Gadidae
Gadus morrhua
postlarva
Helgoland 2017

uk: Математика, природничі науки

description: Gadus morrhua (Teleostei, Gadiformes, Gadidae), postlarva, length 1.3 cm, Helgoland 06.2017. 0:28 min. Species with pelagial eggs. Here postlarval stage is shown. Video can be used for teaching.

uk: вхід без авторизації


Melicertum octocostatum Helgoland 2017

keywords:
Cnidaria
Hydrozoa
Leptolida
Conica
Melicertidae
Melicertum octocostatum
medusa
Helgoland 2017

uk: Математика, природничі науки

description: Melicertum octocostatum (Cnidaria, Hydrozoa, Leptolida, Conica, Melicertidae). Diameter of medusa 8 mm. Helgoland 06.2017. 0:45 min. Hydromedusa with eight radial canals with undulated gonads and a ring canal near the base of the manubrium. Many tentacles (up to 72) around the rim of the umbrella. No marginal sense organs. Video can be used for teaching.

uk: вхід без авторизації


uk: Математика, природничі науки

description: Ophiura albida (Echinodermata, Ophiuroid, Ophiuroidae) after metamorphosis, diameter 800 µm, Helgoland 06.2017. 0:33 min. Ophiuroida start their metamorphosis during planktonic life. So early brittle stars can be found in plankton samples. This specimen shows all elements of an adult including delicate skeletal elements, oral region and ambulacral feet. Video can be used for teaching.

uk: вхід без авторизації

name: Ophiura albida, after metamorphosis Helgoland 2017


keywords:
Phoronida
Phoronis muelleri
actinotrocha larva
Hufeisenwurm
Helgoland 2017

uk: Математика, природничі науки

description: Phoronis muelleri (Phoronida), actinotrocha larva, Helgoland 06.2017. 1:16 min. Actinotrocha larvae may be numerous in summer plankton, living there for some weeks. They start with tiny forms about 50 µm in length which soon develops first tentacles becoming more numerous up to 48 in some species. Old larvae reach a length up to 1 mm. The mouth is hidden under a pre-oral lobe. Cilia on the tentacles and a heavily ciliated telotroch around the anus propel the larvae through the water. Different video-clips show different stages of development. Video can be used for teaching.

uk: вхід без авторизації

name: Phoronis muelleri 1 actinotrocha Helgoland 2017


keywords:
Phoronida
Phoronis muelleri
actinotrocha larva
starting metamorphosis
Hufeisenwurm
Helgoland 2017

uk: Математика, природничі науки

description: Phoronis muelleri (Phoronida), actinotrocha larva, starting metamorphosis, length 1.5 mm, Helgoland 06.2017. 0:41 min. Late actinotrocha larvae reach a length up to 1 mm. The mouth is hidden under a pre-oral lobe. Cilia on the tentacles and a heavily ciliated telotroch around the anus propel the larvae through the water. This video shows a specimen in preparation for metamorphosis which is an unique process, taking place on the sediment in not more than 30 min. It starts with the eversion of the metasomal sac, visible in this video. Video can be used for teaching.

uk: вхід без авторизації

name: Phoronis muelleri 2 actinotrocha Helgoland 2017


Caligus sp. Helgoland 2019

keywords:
Crustacea
Copepoda
Siphonostomatoida
Caligidae
Caligus sp.
Helgoland 2019

uk: Математика, природничі науки

description: Caligus sp. (Crustacea, Copepoda, Siphonostomatoida, Caligidae), length 1.1 cm, Helgoland 06.2019. 1:28 min. This big ectoparasitic copepods have a large cephalothorax. The second antennae are modified into suckers as an attachment organ. Female deposit big ribbons of eggs. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Cnidaria
Anthozoa
Ceriantharia
Cerianthidae
Cerianthus sp.
antipathula larva
Helgoland 2016

uk: Математика, природничі науки

description: Cerianthus sp. (Cnidaria, Anthozoa, Ceriantharia, Cerianthidae), antipathula larva, width 750 µm, Helgoland 03.2016. 1:26 min. Antipathula is a specialized larva of the tube anemones, developing from the planula. Inside three pairs of septae develop and four tentacles surrounding the mouth. Later on more septae and tencales develop to form the so-called cerinula. This larva settle on the ground, forming a tube in which the sea anemone can be retracted. Video can be used for teaching.

uk: вхід без авторизації

name: Cerianthus sp. antipathula larva Helgoand 2016


Cyanea capillata Helgoland 2017

keywords:
Cnidaria
Scyphozoa
Semaeostomae
Cyanidae
Cyanea capillata
early medusa
Helgoland 2017

uk: Математика, природничі науки

description: Cyanea capillata (Cnidaria, Scyphozoa, Semaeostomae, Cyanidae), early medusa, diameter 2 cm, Helgoland 06.2017. 1:03 min This common member of Semaeostomae demonstrates the typical four folded mouth arms, eight groups of tentacles and eight deep incisions at the bell margin, each with a rhopalium at its base. Video can be used for teaching.

uk: вхід без авторизації


Cyclopterus lumpus Helgoland 2017

keywords:
Teleostei
Perciformes
Cottoidei
Cyclopteridae
Cyclopterus lumpus
Helgoland 2017

uk: Математика, природничі науки

description: Cyclopterus lumpus (Teleostei, Perciformes, Cottoidei, Cyclopteridae), length 5 mm, Helgoland 06.2017. 0:17 min. Eggs of Cyclopterus lumpus are deposited at the ground of tidal areas, e.g. at the rhizoids of Laminaria-species. The tadpole-like postlarvae possess a ventral sucker to fix themselves to rocks or algae. Video can be used for teaching.

uk: вхід без авторизації


Evadne nordmanni Helgoland 2017

keywords:
Crustacea
Branchiopoda
Cladocera
Podonidae
Evadne nordmanni
Helgoland 2017

uk: Математика, природничі науки

description: Evadne nordmanni (Crustacea, Branchiopoda, Cladocera, Podonidae), length 700 µm, Helgoland 06.2017. 1:22 min. Evadne nordmanni often is very numerous in the North Sea. Female produce parthenogenetic eggs which develop in the brood chambre formed by the carapax, which can be filled completely. The embryos can cause a deformation. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Dinoflagellata
Dinophyceae
Gonyaulacales
Ceratiaceae
Neoceratium cf. horridum 1
Helgoland 2019

uk: Математика, природничі науки

description: Neoceratium cf. horridum 1 (Dinoflagellata, Dinophyceae, Gonyaulacales, Ceratiaceae), width 210 µm, Helgoland 06.2019. 0:22 min. One strait apical and two curved antapical horns, the right almost parallel to the apical horn. Variable. Video can be used for teaching.

uk: вхід без авторизації


Sagitta sp. Helgoland 2020

keywords:
Chaetognatha
Sagittidae
Sagitta sp.
Helgoland 2020

uk: Математика, природничі науки

description: Sagitta sp. (Chaetognatha, Sagittidae), length 3.3 mm, Helgoland 08.2020. 0:52 min. Chaetognatha are important members of the plankton foodweb as predators and food in a similar manner. The slender streamlined body moves fast, propelled by four longitudinal muscle bands, the prey is caught with two rows of grasping spines (chaetae, hooks). Video can be used for teaching.

uk: вхід без авторизації


Sponge spicule Helgoland 2018

keywords:
Porifera
Calcarea
sponge spicule
Helgoland 2018

uk: Математика, природничі науки

description: Porifera, Calcarea, undetermined sponge spicule, max. width 900 µm, Helgoland 06.2018. 0:18 min. Spiculae of porifera often occur in coastal waters, though they do not belong to planktonic organisms. They appear in different shapes. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Echinodermata
Astroida
Forcipulatida
Asteridae
Asterias rubens
late metamorphosis
Helgoland 2018

uk: Математика, природничі науки

description: Asterias rubens (Echinodermata, Astroida, Forcipulatida, Asteridae), late metamorphosis, diameter 1.6 mm, Helgoland 06.2018. 0:28 min. During the late phase of metamorphosis the remains of the larva disappear more and more and the future starfish body dominates. In this late larva the adhesive arms are still well developed while the starfish body is not yet radial symmetric. Video can be used for teaching.

uk: вхід без авторизації

name: Asteria rubens late metamorphosis Helgoland 2018


Asterias rubens Helgoland 2018

keywords:
Echinodermata
Asteroida
Forcipulatida
Asteridae
Asterias rubens
adult starfish
diameter 8 cm
Helgoland 2018

uk: Математика, природничі науки

description: Asterias rubens (Echinodermata, Asteroida, Forcipulatida, Asteridae), adult starfish, diameter 8 cm, Helgoland 06.2018. 0:15 min. An adult starfish in its environment (to complete the whole developmental cycle). Video can be used for teaching.

uk: вхід без авторизації


Caligus sp. Helgoland 2017

keywords:
Crustacea
Copepoda
Siphonostomatoida
Caligidae
Caligus sp.
Helgoland 2017

uk: Математика, природничі науки

description: Caligus sp. (Crustacea, Copepoda, Siphonostomatoida, Caligidae), length 5.5 mm, Helgoland 06.2017. 1:08 min. This big ectoparasitic copepods have a large cephalothorax. The second antennae are modified into suckers as an attachment organ. Female deposit big ribbons of eggs. Video can be used for teaching.

uk: вхід без авторизації


Coscinodiscus radiatus Helgoland 2019

keywords:
Bacillariophyceae
Coscinodiscophycidae
Coscinodiscales
Coscinodiscaceae
Coscinodiscus radiatus
Helgoland 2019

uk: Математика, природничі науки

description: Coscinodiscus radiatus (Bacillariophyceae, Coscinodiscophycidae, Coscinodiscales, Coscinodiscaceae), diameter 180 µm, Helgoland 06.2019. 0:36 min. Valves wider than high, valve centre with rosette of larger areolae. Video can be used for teaching.

uk: вхід без авторизації


Cypris larva Helgoland 2019

keywords:
Crustacea
Cirripedia
Thoracica
Balanomorpha
Balanidae
cypris larva
Helgoland 2019

uk: Математика, природничі науки

description: Cypris larva (Crustacea, Cirripedia, Thoracica, Balanomorpha, Balanidae), length 560 µm, Helgoland 06.2019. 0:27 min. The primary larva of Cirripedia is the nauplius larva. During the sixth moult the completely different cypris larva is formed. The body is enclosed between laterally shells, with one pair of antennae and six pairs of thoracopods. There is a nauplius eye and a pair of complex eyes. The cypris settles at the ground. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Echinodermata
Echinoida
Spatangoida
Loveniidae
Echinocardium chordatum
early pluteus
Helgoland 2019

uk: Математика, природничі науки

description: Echinocardium chordatum (Echinodermata, Echinoida, Spatangoida, Loveniidae), very early pluteus, width 350 µm, Helgoland 06.2019. 0:33 min. Early pluteus with only two pairs of arms. Video can be used for teaching.

uk: вхід без авторизації

name: Echinocardium cordatum very early pluteus Helgoland 2019


Evadne nordmanni Helgoland 2019

keywords:
Crustacea
Branchiopoda
Cladocera
Podonidae
Evadne nordmanni
Helgoland 2019

uk: Математика, природничі науки

description: Evadne nordmanni (Crustacea, Branchiopoda, Cladocera, Podonidae), length 750 µm, Helgoland 06.2019. 1:00 min. Evadne nordmanni often is very numerous in the North Sea. Female produce parthenogenetic eggs which develop in the brood chambre formed by the carapax, which can be filled completely. The embryos can cause a deformation. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Nemertea
Nemertini
Heteronemertea
Lineidae
Lineus sp.
pilidium larva
Helgoland 2018

uk: Математика, природничі науки

description: Lineus sp. (Nemertea, Nemertini, Heteronemertea, Lineidae), pilidium larva, hight 430 µm, Helgoland 06.2018. 0:24 min. The taxon Heteronemertea in the taxon Nemertea or Nemertini develops characteristic planktonic pilidium larve (pilidum: form of roman helmet) with fore-lobe like a baseball-cap and hind lobe, at each side lateral lobes, all equipped with ciliary bands. The mouth is located between these lobes. An apical plate near the top bears a tuft of long stiff cilia. Video can be used for teaching.

uk: вхід без авторизації

name: Lineus sp., pilidium larva Helgoland 2018


Lanice conchilega Helgoland 2019

keywords:
"Polychaeta"
Terebellida
Terebellidae
Lanice conchilega
larva aulophora III
Helgoland 2019

uk: Математика, природничі науки

description: Lanice conchilega ("Polychaeta", Terebellida, Terebellidae), larva aulophora III, length 1.8 mm, Helgoland 06.2019. 0:52 min. The unique development of Lanice conchilega leads to an early larva, which settles for shortly at the bottom, then forming a tube and starting a second planktonic life as aulophora with 3 stages. The transparent tube, open at both ends, is often covered by mud and small particles. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Nemertea
Heteronemertea
Lineidae
Lineus albocinctus
pilidium larva
Helgoland 2019

uk: Математика, природничі науки

description: Lineus albocinctus (Nemertea, Heteronemertea, Lineidae), pilidium larva, width 700 µm, Helgoland 06.2019. 0:43 min. The taxon Heteronemertea in the taxon Nemertea or Nemertini develops characteristic planktonic pilidium larve (pilidum: form of roman helmet) with fore-lobe like a baseball-cap and hind-lobe, at each side lateral lobes, all equipped with ciliary bands. The mouth is located between these lobes. An apical plate near the top bears a tuft of long stiff cilia. Video can be used for teaching.

uk: вхід без авторизації

name: Lineus albocinctus pilidium Helgoland 2019


keywords:
Crustacea
Malacostraca
Decapoda
Brachyura
Portunidae
Liocarcinus holsatus
frontal view
Helgoland 2019

uk: Математика, природничі науки

description: Liocarcinus holsatus Crustacea, Malacostraca, Decapoda, Brachyura, Portunidae), frontal view, width of lateral thorns 1.3 mm, Helgoland 06.2019. 0:32 min. The “blue crab” has a typical zoea larva which is equipped with a pair of lateral spines visible from the front or back side. The telson has a special arrangement of spines. Video can be used for teaching.

uk: вхід без авторизації

name: Liocarcinus holsatus zoea Helgoland 2019


Muggiaea atlantica Helgoland 2019

keywords:
Cnidaria
Hydrozoa
Siphonophorae
Diphyidae
Muggiaea atlantica
empty shell
Helgoland 2019

uk: Математика, природничі науки

description: Muggiaea atlantica (Cnidaria, Hydrozoa, Siphonophorae, Diphyidae), empty shell of nectophore, length 2.1 mm, Helgoland 06.2019. 0:40 min. Streamlined nectophore, apical pointed, with five longitudinal ridges, the empty shell is covered with different algae. Video can be used for teaching.

uk: вхід без авторизації


Myrianida prolifera Helgoland 2019

keywords:
"Polychaeta"
Phyllodocida
Syllidae
Myrianida (Autolytus) prolifera
Helgoland 2019

uk: Математика, природничі науки

description: Myrianida (Autolytus) prolifera ("Polychaeta", Phyllodocida, Syllidae), male, eye distance 300 µm, Helgoland 06.2019. 0:38 min. Males of Myrianida develop strong parapodia for swimming with natatory chaetae, a pair of bifid antennae, and a pair of big eyes. The gut is reduced. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Dinoflagellata
Dinophyceae
Gonyaulacales
Ceratiaceae
Neoceratium cf. horridum 2
Helgoland 2019

uk: Математика, природничі науки

description: Neoceratium cf. horridum 2 (Dinoflagellata, Dinophyceae, Gonyaulacales, Ceratiaceae), width 220 µm, Helgoland 2019. 0:25 min. One strait apical and two curved antapical horns, the right almost parallel to the apical horn. Variable. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Dinoflagellata
Dinophyceae
Gonyaulacales
Ceratiaceae
Neoceratium cf. horridum 3
Helgoland 2019

uk: Математика, природничі науки

description: Neoceratium cf. horridum 3 (Dinoflagellata, Dinophyceae, Gonyaulacales, Ceratiaceae), width 240 µm, Helgoland 06.2019. 0:25 min. One strait apical and two curved antapical horns, the right almost parallel to the apical horn. Variable. Video can be used for teaching.

uk: вхід без авторизації


keywords:
Phoronida
Phoronis muelleri
actinotrocha larva
Hufeisenwurm
Helgoland 2020

uk: Математика, природничі науки

description: Phoronis muelleri (Phoronida), actinotrocha larva, Helgoland 08.2020. 0:57 min. The actinotrocha is a vivid larva under the microscope. Old larvae reach a length up to 1 mm. The mouth is hidden under a pre-oral lobe. Cilia on the tentacles and a heavily ciliated telotroch around the anus propel the larvae through the water. Video can be used for teaching.

uk: вхід без авторизації

name: Phoronis muelleri, actinotrocha larva Helgoland 2020


Noctiluca scintillans Helgoland 2019

keywords:
Dinoflagellata
Dinophyceae
Noctilucales
Noctilucaceae
Noctiluca scintillans
Helgoland 2019

uk: Математика, природничі науки

description: Noctiluca scintillans (Dinoflagellata, Dinophyceae, Noctilucales, Noctilucaceae), diameter 450 µm, Helgoland 06.2019. 0:44 min. Popular plankton organisms with bladder-shaped, naked cells, 400–800 µm in diameter and transparent. The ingested food often can be determined, e.g. diatoms. Video can be used for teaching.

uk: вхід без авторизації


Oikopleura dioica Helgoland 2019

keywords:
Tunicata
Appendicularia
Oikopleuridae
Oikopleura dioica
habitus
Helgoland 2019

uk: Математика, природничі науки

description: Oikopleura dioica (Tunicata, Appendicularia, Oikopleuridae), habitus, early specimen, length of "head" 250 µm, Helgoland 06.2019. 0:44 min. These tiny animals are special in their “larval” organization and unique filter feeding structure, which they shed easily. Though mainly only the body with trunk and tail is found in plankton samples. Video can be used for teaching

uk: вхід без авторизації


keywords:
Echinodermata
Ophiuroida
Ophiuridae
Ophiura albida
end of metamorphosis
Helgoland 2019

uk: Математика, природничі науки

description: Ophiura albida (Echinodermata, Ophiuroida, Ophiuridae), end of metamorphosis, diameter 900 µm, Helgoland 06.2019. 0:50 min. At the end of metamorphosis all remains of the pluteus had disappeared and a small brittle star with short arms has formed. Video can be used for teaching.

uk: вхід без авторизації

name: Ophiura albida after metamorphosis Helgoland 2019


keywords:
"Polychaeta"
Terebellida
Pectinariidae
Pectinatria koreni
late larva
Helgoland 2019

uk: Математика, природничі науки

description: Pectinaria koreni (“Polychaeta”, Terebellida, Pectinariidae), metatrochophora, length 650 µm, Helgoland 06.2019. 0:46 min. This larva is characterized by a strong proto- and telotroch and numerous chromatophores, partly in segmental arrangement. Video can be used for teaching.

uk: вхід без авторизації

name: Pectinaria koreni late larva Helgoland 2019


Podon leuckarti Helgoland 2019

keywords:
Crustacea
Branchiopoda
Cladocera
Onychopoda
Podonidae
Podon leuckarti
lateral view
Helgoland 2019

uk: Математика, природничі науки

description: Podon leuckarti (Crustacea, Branchiopoda, Cladocera, Onychopoda, Podonidae), lateral view, length 730 µm, Helgoland 06.2019. 0:21 min. There are only a few species of Cladocera in the marine environment, main genera are Evadne and Podon, the latter has a dorsal depression between head and thorax and a rounded carapace, in females bearing the eggs. Video can be used for teaching.

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Protoperidinium sp. Helgoland 2018

keywords:
Dinoflagellata
Peridiniales
Protoperidiniaceae
Protperidinium sp.
Helgoland 2018

uk: Математика, природничі науки

description: Protoperidinium sp. (Dinoflagellata, Peridiniales, Protoperidiniaceae), diameter 60 µm, Helgoland 06.2018. 0:19 min. Protoperidinium is a big genus with variable species. This species shows rich red chromatophores. The surface is covered by a complex pattern of plates (tabulation). This is not easy to recognize under the light microscope. Video can be used for teaching.

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Tegastidae Helgoland 2019

keywords:
Cruastacea
Copepoda
Harpacticoidea
Tegastidae
Helgoland 2019

uk: Математика, природничі науки

description: Copepoda, Harpacticoidea, Tegastidae, undetermined species, length 350 µm, Helgoland 06.2019. 1:01 min. These copepods resemble amphipods, body compress, lateral view nearly circular, with big subchelae and big nauplius eye. First antenna relatively short, telson with a pair of long bristles. Video can be used for teaching.

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Acartia clausi, exuvia Helgoland 2019

keywords:
Crustacea
Copepoda
Calanoida
Acartiidae
Acartia clausi
exuvia
Helgoland 2019

uk: Математика, природничі науки

description: Acartia clausi (Crustacea, Copepoda, Calanoida, Acartiidae), exuvia, lateral view, body length 850 µm, Helgoland 06.2019. 0:40 min. These specimens come from a culture of the Biologische Anstalt Helgoland. They can be found in brackish waters of estuaries and lagoons, e. g. in the Mediterranean. Antennae 1 of the genus with characteristic pattern of setae. Urosome as in many copepods with a fan of plumose setae. Suspension feeders, maxilla 2 forms a feeding basket. Video can be used for teaching.

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keywords:
Echinodermata
Ophiuroida
Ophiuridae
Amphiura sp.
pluteus larva
Helgoland 2020

uk: Математика, природничі науки

description: Amphiura sp. (Echinodermata, Ophiuroida, Ophiuridae), pluteus larva, width 950 µm, Helgoland 08.2020. 0:33 min. This medium-aged ophiopluteus demonstrates the wide open lateral arms, typical for Ophiuroida. It´s a frontal view with the left hydrocoel on the right. Video can be used for teaching.

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Corystes sp., zoea Helgoland 2020

keywords:
Crustacea
Malacostraca
Decapoda
Pleocyemata
Brachyura
Corystidae
Corystes sp.
Helgoland 2020

uk: Математика, природничі науки

description: Corystes sp. (Crustacea, Malacostraca, Decapoda, Pleocyemata, Brachyura, Corystidae), Corystes sp., length 10 mm, Helgoland 08.2020. 0:30 min. Corystes develops a typical zoea larva with a comparatively long rostral spine and, as other Brachyura, one dorsal spine of about the same length. Video can be used for teaching.

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keywords:
Crustacea
Malacostraca
Decapoda
Pleocyemata
Nephropidae
Homarus gammarus
early larva
Helgoland 2018

uk: Математика, природничі науки

description: Homarus gammarus (Crustacea, Malacostraca, Decapoda, Pleocyemata, Nephropidae), early larva, length 8 mm, Helgoland 06.2018. 0:25 min. Larvae of decapods occur in different forms. In Homarus gammarus only the first (three) stages can be found in the plankton for some weeks. Video can be used for teaching.

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name: Homarus gammarus, early larva Helgoland 2018


Polydora sp. Helgoland 2019

keywords:
"Polychaeta"
Spionida
Spionidae
Polydora sp.
late larva
Helgoland 2019

uk: Математика, природничі науки

description: Polydora sp. ("Polychaeta", Spionida, Spionidae), late larva, length 800 µm, Helgoland 06.2019. 0:59 min. Larval spionids can be observed all year round. The agile larvae move by their prototroch and telotroch. They often spread their segmental chaetae. Paired eyes on the prostomium and specific pattern of chromatophores on the segments distinguish the species. Video can be used for teaching.

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keywords:
Phoronida
Phoronis muelleri
actinotrocha larva
Hufeisenwurm
Helgoland 2018

uk: Математика, природничі науки

description: Phoronis muelleri (Phoronida), late actinotrocha larva, length 700 µm, Helgoland 06.2018. 0:33 min. A late actinotrocha has numerous tentacles (up to 48) and a strong telotroch. In this specimen the gut contains some living Dinophyta. Video can be used for teaching.

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name: Phoronis muelleri, actinotrocha larva, Helgoland 2018


Upogebia sp. Helgoland 2019

keywords:
Crustacea
Decapoda
Malacostraca
Pleocyemata
Gebiidea
Upogebiidae
Upogebia sp.
zoea larva
Helgoland 2019

uk: Математика, природничі науки

description: Upogebia sp. (Crustacea, Decapoda, Malacostraca, Pleocyemata, Gebiidea, Upogebiidae), zoea larva, length 1.3 mm, Helgoland 06.2019. 0:17 min. Larvae of Upogebia are often abundant around Helgoland. Big eyes and a broad telson with characteristic bristles are typical. Video can be used for teaching.

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