The varied diet of the sea slug Doris kerguelenensis in Deception Island (South Shetland Is., Antarctica)
VII International Symposium on Marine Sciences (ISMS 2020), 1-3 July 2020 (Barcelona).-- 1 page Doris kerguelenensisis an Antarctic heterobranch molluscf eeding on several demosponges and hexactinellid sponges. To assess the contribution of several sponge species to its diet at Deception Island we u...
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ftcsic:oai:digital.csic.es:10261/228708 2024-02-11T09:58:30+01:00 The varied diet of the sea slug Doris kerguelenensis in Deception Island (South Shetland Is., Antarctica) De Castro-Fernández, Paula Giménez, Joan Àvila, Conxita Cardona, Luis 2020-07 http://hdl.handle.net/10261/228708 en eng https://isms.cat/wp-content/uploads/2020/09/libro-ISMS-2020.pdf Sí Abstracts volume VII International Symposium on Marine Sciences: 259 (2020) 978-84-120734-7-8 http://hdl.handle.net/10261/228708 none Stable isotopes Fatty acids Gastropod molluscs Porifera Southern Ocean comunicación de congreso http://purl.org/coar/resource_type/c_5794 2020 ftcsic 2024-01-16T11:02:21Z VII International Symposium on Marine Sciences (ISMS 2020), 1-3 July 2020 (Barcelona).-- 1 page Doris kerguelenensisis an Antarctic heterobranch molluscf eeding on several demosponges and hexactinellid sponges. To assess the contribution of several sponge species to its diet at Deception Island we used stable isotopes of C and N, as well as fatty acids. We examined the demosponges Axinella crinita, Dendrilla antarctica, Hemigellius pilosus, Kirkpatrickia variolosa, Mycale acerata, Sphaerotylus antarcticus, and Haliclona sp. We also analyzed the macroalgae Desmarestia anceps and Himantothallus grandifolius, and phytoplankton. D. anceps was the most 13C depleted one and phytoplankton the most enriched. The δ13C values of sponges and D. kerguelenensis laid in between. The δ15N values of A. crinita, D. antarctica, M. acerata and Haliclona sp.suggested a trophic position between 2-3, and for H. pilosus and S. antarcticus between 3-4. Kirkpatrickia variolosa was in between the two groups. The δ15N values of D. kerguelenensis revealed a trophic position from 3-4. All sponges and D. kerguelenensis had high levels of 15:0 and EPA and low levels of arachidonic acid, largely differing from macroalgae. Fatty acid profiles of A. crinita, D. antarctica, K. variolosa, M. acerata, S. antarcticus, and Haliclona sp. were similar to phytoplankton, but D. kerguelenensis and H. pilosuswere enriched in 17:0, 20:1n9 and 20:2. D. kerguelenensis, A. crinita, D. antarctica, K. variolosa, Haliclona sp. and S. antarcticus shared a long chain fatty acid absent in phytoplankton and macroalgae.The overall evidence suggests that A. crinita, D. antarctica, K.v ariolosa and Haliclona sp. are the most likely prey of D. kerguelenensis at Deception Island Peer reviewed Conference Object Antarc* Antarctic Antarctica antarcticus Deception Island Southern Ocean Digital.CSIC (Spanish National Research Council) Antarctic Deception Island ENVELOPE(-60.633,-60.633,-62.950,-62.950) Southern Ocean |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
topic |
Stable isotopes Fatty acids Gastropod molluscs Porifera Southern Ocean |
spellingShingle |
Stable isotopes Fatty acids Gastropod molluscs Porifera Southern Ocean De Castro-Fernández, Paula Giménez, Joan Àvila, Conxita Cardona, Luis The varied diet of the sea slug Doris kerguelenensis in Deception Island (South Shetland Is., Antarctica) |
topic_facet |
Stable isotopes Fatty acids Gastropod molluscs Porifera Southern Ocean |
description |
VII International Symposium on Marine Sciences (ISMS 2020), 1-3 July 2020 (Barcelona).-- 1 page Doris kerguelenensisis an Antarctic heterobranch molluscf eeding on several demosponges and hexactinellid sponges. To assess the contribution of several sponge species to its diet at Deception Island we used stable isotopes of C and N, as well as fatty acids. We examined the demosponges Axinella crinita, Dendrilla antarctica, Hemigellius pilosus, Kirkpatrickia variolosa, Mycale acerata, Sphaerotylus antarcticus, and Haliclona sp. We also analyzed the macroalgae Desmarestia anceps and Himantothallus grandifolius, and phytoplankton. D. anceps was the most 13C depleted one and phytoplankton the most enriched. The δ13C values of sponges and D. kerguelenensis laid in between. The δ15N values of A. crinita, D. antarctica, M. acerata and Haliclona sp.suggested a trophic position between 2-3, and for H. pilosus and S. antarcticus between 3-4. Kirkpatrickia variolosa was in between the two groups. The δ15N values of D. kerguelenensis revealed a trophic position from 3-4. All sponges and D. kerguelenensis had high levels of 15:0 and EPA and low levels of arachidonic acid, largely differing from macroalgae. Fatty acid profiles of A. crinita, D. antarctica, K. variolosa, M. acerata, S. antarcticus, and Haliclona sp. were similar to phytoplankton, but D. kerguelenensis and H. pilosuswere enriched in 17:0, 20:1n9 and 20:2. D. kerguelenensis, A. crinita, D. antarctica, K. variolosa, Haliclona sp. and S. antarcticus shared a long chain fatty acid absent in phytoplankton and macroalgae.The overall evidence suggests that A. crinita, D. antarctica, K.v ariolosa and Haliclona sp. are the most likely prey of D. kerguelenensis at Deception Island Peer reviewed |
format |
Conference Object |
author |
De Castro-Fernández, Paula Giménez, Joan Àvila, Conxita Cardona, Luis |
author_facet |
De Castro-Fernández, Paula Giménez, Joan Àvila, Conxita Cardona, Luis |
author_sort |
De Castro-Fernández, Paula |
title |
The varied diet of the sea slug Doris kerguelenensis in Deception Island (South Shetland Is., Antarctica) |
title_short |
The varied diet of the sea slug Doris kerguelenensis in Deception Island (South Shetland Is., Antarctica) |
title_full |
The varied diet of the sea slug Doris kerguelenensis in Deception Island (South Shetland Is., Antarctica) |
title_fullStr |
The varied diet of the sea slug Doris kerguelenensis in Deception Island (South Shetland Is., Antarctica) |
title_full_unstemmed |
The varied diet of the sea slug Doris kerguelenensis in Deception Island (South Shetland Is., Antarctica) |
title_sort |
varied diet of the sea slug doris kerguelenensis in deception island (south shetland is., antarctica) |
publishDate |
2020 |
url |
http://hdl.handle.net/10261/228708 |
long_lat |
ENVELOPE(-60.633,-60.633,-62.950,-62.950) |
geographic |
Antarctic Deception Island Southern Ocean |
geographic_facet |
Antarctic Deception Island Southern Ocean |
genre |
Antarc* Antarctic Antarctica antarcticus Deception Island Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica antarcticus Deception Island Southern Ocean |
op_relation |
https://isms.cat/wp-content/uploads/2020/09/libro-ISMS-2020.pdf Sí Abstracts volume VII International Symposium on Marine Sciences: 259 (2020) 978-84-120734-7-8 http://hdl.handle.net/10261/228708 |
op_rights |
none |
_version_ |
1790594166790553600 |