A novel mode of reproduction (radial gemmipary from a flat disk followed by linear fissipary) of Polychaeta (Annelida) sea worms of the Errantia group revealed by polarization and stereoscopic microscopy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F20%3A00534590" target="_blank" >RIV/61388971:_____/20:00534590 - isvavai.cz</a>

Výsledek na webu

<a href="https://jmo.fzu.cz/sites/jmo.fzu.cz/files/oldweb/2020/2020-09/JMO_20_09_obsah.pdf" target="_blank" >https://jmo.fzu.cz/sites/jmo.fzu.cz/files/oldweb/2020/2020-09/JMO_20_09_obsah.pdf</a>

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

A novel mode of reproduction (radial gemmipary from a flat disk followed by linear fissipary) of Polychaeta (Annelida) sea worms of the Errantia group revealed by polarization and stereoscopic microscopy

Popis výsledku v původním jazyce

The Polychaeta worms (Annelida) of the Errantia group are very important seabed animals that maintain the ecological balance of this habitat. Therefore, it is necessary to study their life cycles, especially the ways of reproduction, whether sexual or asexual. We study here a special mode of reproduction of marine Polychaeta of the Errantia group, see budding (radial gemmipary from a flat disc) followed by linear fissipary. The Carl Zeiss Jena stereoscopic microscope of the Technival type was used for morphological study of worm budding and their further division at a lower magnification, the Meopta Prague BC 28 SV polarizing microscope being employed for their more detailed study at a higher magnification including polarized light (polarizer, analyzer and a first order quartz compensator, LOMO Sankt Petersburg) to determine the birefringence of some structures. The material was collected during the trip to Croatia (June 2019) off the island of Ugljan in the Adriatic Sea (Mala Lamjana Bay, Kali village). The basis for the reproduction of these Polychaeta is a flat disc-shaped formation, from which five worms (radial gemmipary) sprout radially, these are further divided by linear fissipary into individual worms. Separate worms then grow their prostomium and pygidium. Five yellow protrusions were found in the disk, connected to budding worms and showing a medium birefringence. The largest birefringence was found in very large claws and barbed bristles (chaetae, setae), which were characterized by interference colors when using a quartz compensator. In contrast, the gill protrusions showed no or only a very weak birefringence. On comparing our results with the observations of other authors, we should note that none of previous studies has described the radial budding (gemmipary) of individuals from a flat disk and their subsequent division (fissipary) into more individuals.

Název v anglickém jazyce

A novel mode of reproduction (radial gemmipary from a flat disk followed by linear fissipary) of Polychaeta (Annelida) sea worms of the Errantia group revealed by polarization and stereoscopic microscopy

Popis výsledku anglicky

The Polychaeta worms (Annelida) of the Errantia group are very important seabed animals that maintain the ecological balance of this habitat. Therefore, it is necessary to study their life cycles, especially the ways of reproduction, whether sexual or asexual. We study here a special mode of reproduction of marine Polychaeta of the Errantia group, see budding (radial gemmipary from a flat disc) followed by linear fissipary. The Carl Zeiss Jena stereoscopic microscope of the Technival type was used for morphological study of worm budding and their further division at a lower magnification, the Meopta Prague BC 28 SV polarizing microscope being employed for their more detailed study at a higher magnification including polarized light (polarizer, analyzer and a first order quartz compensator, LOMO Sankt Petersburg) to determine the birefringence of some structures. The material was collected during the trip to Croatia (June 2019) off the island of Ugljan in the Adriatic Sea (Mala Lamjana Bay, Kali village). The basis for the reproduction of these Polychaeta is a flat disc-shaped formation, from which five worms (radial gemmipary) sprout radially, these are further divided by linear fissipary into individual worms. Separate worms then grow their prostomium and pygidium. Five yellow protrusions were found in the disk, connected to budding worms and showing a medium birefringence. The largest birefringence was found in very large claws and barbed bristles (chaetae, setae), which were characterized by interference colors when using a quartz compensator. In contrast, the gill protrusions showed no or only a very weak birefringence. On comparing our results with the observations of other authors, we should note that none of previous studies has described the radial budding (gemmipary) of individuals from a flat disk and their subsequent division (fissipary) into more individuals.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

—

OECD FORD obor

10606 - Microbiology

Projekt

<a href="/cs/project/LO1509" target="_blank" >LO1509: Pražská infrastruktura pro strukturní biologii a metabolomiku II</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Jemná mechanika a optika

ISSN

0447-6441

e-ISSN

—

Svazek periodika

65

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

5

Strana od-do

226-230

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—