Palatability and chemical defenses of sponges from the western Antarctic Peninsula
The present study surveyed the palatability of all sponge species that could be collected in sufficient quantities in a shallow-water area along the western Antarctic Peninsula. Of 27 species assayed, 78% had outermost tissues that were significantly unpalatable to the sympatric, omnivorous sea star...
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ftunivamstpubl:oai:uvapub:307348 2023-05-15T13:57:17+02:00 Palatability and chemical defenses of sponges from the western Antarctic Peninsula K.J. Peters C.D. Amsler J.B. McClintock R.W.M. van Soest B.J. Baker 2009 http://hdl.handle.net/11245/1.307348 unknown 10.3354/meps08026 It is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content licence (like Creative Commons). Marine Ecology - Progress Series (01718630) vol.385 (2009) p.77-85 article 2009 ftunivamstpubl 2015-11-19T11:15:15Z The present study surveyed the palatability of all sponge species that could be collected in sufficient quantities in a shallow-water area along the western Antarctic Peninsula. Of 27 species assayed, 78% had outermost tissues that were significantly unpalatable to the sympatric, omnivorous sea star Odontaster validus. Of those species with unpalatable outer tissues, 62% had inner tissues that were also unpalatable to the sea stars. Sea stars have often been considered as the primary predators of sponges in other regions of Antarctica, and their extra-oral mode of feeding threatens only the outermost sponge tissues. The observation that many of the sponges allocate defenses to inner tissues suggests the possibility that biting predators such as mesograzers, which could access inner sponge layers, may also be important in communities along the Antarctic Peninsula. In feeding bioassays with extracts from 12 of the unpalatable species in artificial foods, either lipophilic or hydrophilic extracts were deterrent in each species. These data indicate an overall level of chemical defenses in these Antarctic sponges that is comparable to, and slightly greater than, that found in a previous survey of tropical species. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Universiteit van Amsterdam: Digital Academic Repository (UvA DARE) Antarctic Antarctic Peninsula The Antarctic |
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collection |
Universiteit van Amsterdam: Digital Academic Repository (UvA DARE) |
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ftunivamstpubl |
language |
unknown |
description |
The present study surveyed the palatability of all sponge species that could be collected in sufficient quantities in a shallow-water area along the western Antarctic Peninsula. Of 27 species assayed, 78% had outermost tissues that were significantly unpalatable to the sympatric, omnivorous sea star Odontaster validus. Of those species with unpalatable outer tissues, 62% had inner tissues that were also unpalatable to the sea stars. Sea stars have often been considered as the primary predators of sponges in other regions of Antarctica, and their extra-oral mode of feeding threatens only the outermost sponge tissues. The observation that many of the sponges allocate defenses to inner tissues suggests the possibility that biting predators such as mesograzers, which could access inner sponge layers, may also be important in communities along the Antarctic Peninsula. In feeding bioassays with extracts from 12 of the unpalatable species in artificial foods, either lipophilic or hydrophilic extracts were deterrent in each species. These data indicate an overall level of chemical defenses in these Antarctic sponges that is comparable to, and slightly greater than, that found in a previous survey of tropical species. |
format |
Article in Journal/Newspaper |
author |
K.J. Peters C.D. Amsler J.B. McClintock R.W.M. van Soest B.J. Baker |
spellingShingle |
K.J. Peters C.D. Amsler J.B. McClintock R.W.M. van Soest B.J. Baker Palatability and chemical defenses of sponges from the western Antarctic Peninsula |
author_facet |
K.J. Peters C.D. Amsler J.B. McClintock R.W.M. van Soest B.J. Baker |
author_sort |
K.J. Peters |
title |
Palatability and chemical defenses of sponges from the western Antarctic Peninsula |
title_short |
Palatability and chemical defenses of sponges from the western Antarctic Peninsula |
title_full |
Palatability and chemical defenses of sponges from the western Antarctic Peninsula |
title_fullStr |
Palatability and chemical defenses of sponges from the western Antarctic Peninsula |
title_full_unstemmed |
Palatability and chemical defenses of sponges from the western Antarctic Peninsula |
title_sort |
palatability and chemical defenses of sponges from the western antarctic peninsula |
publishDate |
2009 |
url |
http://hdl.handle.net/11245/1.307348 |
geographic |
Antarctic Antarctic Peninsula The Antarctic |
geographic_facet |
Antarctic Antarctic Peninsula The Antarctic |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica |
op_source |
Marine Ecology - Progress Series (01718630) vol.385 (2009) p.77-85 |
op_relation |
10.3354/meps08026 |
op_rights |
It is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content licence (like Creative Commons). |
_version_ |
1766264882996445184 |