Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/129962
Title: Insights into the reproduction of some Antarctic dendroceratid, poecilosclerid, and haplosclerid demosponges
Author: Vasiliki Koutsouveli
Sergi Taboada
Juan Moles
Javier Cristobo
Pilar Ríos
Andrea Bertran
Joan Solà
Conxita Avila
Ana Riesgo
Keywords: Antàrtida
Esponges
Reproducció
Fisiologia comparada
Antarctica
Sponges
Reproduction
Comparative physiology
Issue Date: 8-Feb-2018
Publisher: Public Library of Science (PLoS)
Abstract: Sponges are a dominant element of the Antarctic benthic communities, posing both high species richness and large population densities. Despite their importance in Antarctic ecosystems, very little is known about their reproductive patterns and strategies. In our study, we surveyed the tissue of six different species for reproductive elements, namely, Dendrilla antarctica Topsent, 1905 (order Dendroceratida), Phorbas areolatus (Thiele, 1905), Kirkpatrickia variolosa (Kirkpatrick, 1907), and Isodictya kerguelenensis (Ridley & Dendy, 1886) (order Poecilosclerida), and Hemigellius pilosus (Kirkpatrick, 1907) and Haliclona penicillata (Topsent, 1908) (Haplosclerida). Samples of these six species containing various reproductive elements were collected in Deception Island and were processed for both light and transmission electron microscopy (TEM). Even though we were not able to monitor the entire reproductive cycle, due to time and meteorological conditions, we report important aspects of the reproduction of these species. This includes oocyte and embryo morphology and cell ultrastructure, follicular structures and nurse cell activity, as well as vitellogenesis. All species were brooding their embryos within their mesohyl. Both oocytes and embryos were registered in the majority of the studied species, and a single sperm cell being carried to an egg for fertilization was observed in H. penicillata. While the reproductive periods of all species coincided temporally, some of them seemed to rely on a single spawning event, this being suggested by the synchronic oogenesis and embryogenesis occurrence of D. antarctica, P. areolatus and I. kerguelenensis. In contrast, K. variolosa had an asynchronous embryo development, which suggests several larval release events. Our results suggest that differences in the reproductive strategies and morphological traits might succeed in the coexistence of these species at the same habitat avoiding the direct competition between them.
Note: Reproducció del document publicat a: https://doi.org/10.1371/journal.pone.0192267
It is part of: PLoS One, 2018, vol. 13, num. 2, p. e0192267
URI: http://hdl.handle.net/2445/129962
Related resource: https://doi.org/10.1371/journal.pone.0192267
ISSN: 1932-6203
Appears in Collections:Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
Articles publicats en revistes (Institut de Recerca de la Biodiversitat (IRBio))

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