study on the Antarctic krill, Euphausia superba
The application of marker fatty acids to trace the feeding habits of Euphausia superba (krill) has produced contradictory results. We examined the effects of various diets on the fatty acid composition of larval, juvenile, and adult E. superba collected in April 1999 in the southwest Lazarev Sea and...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.419.7560 2023-05-15T13:34:16+02:00 study on the Antarctic krill, Euphausia superba Dorothea Stübing Wilhelm Hagen Katrin Schmidt The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.419.7560 http://www.aslo.org/lo/toc/vol_48/issue_4/1685.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.419.7560 http://www.aslo.org/lo/toc/vol_48/issue_4/1685.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.aslo.org/lo/toc/vol_48/issue_4/1685.pdf text ftciteseerx 2016-01-08T03:53:54Z The application of marker fatty acids to trace the feeding habits of Euphausia superba (krill) has produced contradictory results. We examined the effects of various diets on the fatty acid composition of larval, juvenile, and adult E. superba collected in April 1999 in the southwest Lazarev Sea and in April 2001 in the Bellingshausen Sea. Specimens were fed four different diets (mixed phytoplankton, mixed ice algae, the ice diatom Fragilariopsis cylindrus, and mixed copepod assemblages) or starved for up to 44 d. Total lipid content, lipid classes, and fatty acid composition showed very little variation in juvenile and adult krill with the different feeding regimes. Furcilia lipids were much more strongly influenced by the fatty acid signatures of their food. No stage-specific food preferences were detected in the larvae, and spatial patterns were mirrored by all furcilia stages. Comparison of the fatty acid profiles of the offered food with those of the subsequently excreted feces indicated preferential assimilation of polyunsaturated fatty acids by E. superba. The analysis of lipid compositions has been applied successfully to reveal food web relationships in marine ecosystems. This trophic biomarker concept is based on observations that specific dietary lipid components, particularly fatty Text Antarc* Antarctic Antarctic Krill Bellingshausen Sea Euphausia superba ice algae Lazarev Sea Unknown Antarctic Bellingshausen Sea Lazarev ENVELOPE(12.917,12.917,-69.967,-69.967) Lazarev Sea ENVELOPE(7.000,7.000,-68.000,-68.000) The Antarctic |
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Unknown |
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ftciteseerx |
language |
English |
description |
The application of marker fatty acids to trace the feeding habits of Euphausia superba (krill) has produced contradictory results. We examined the effects of various diets on the fatty acid composition of larval, juvenile, and adult E. superba collected in April 1999 in the southwest Lazarev Sea and in April 2001 in the Bellingshausen Sea. Specimens were fed four different diets (mixed phytoplankton, mixed ice algae, the ice diatom Fragilariopsis cylindrus, and mixed copepod assemblages) or starved for up to 44 d. Total lipid content, lipid classes, and fatty acid composition showed very little variation in juvenile and adult krill with the different feeding regimes. Furcilia lipids were much more strongly influenced by the fatty acid signatures of their food. No stage-specific food preferences were detected in the larvae, and spatial patterns were mirrored by all furcilia stages. Comparison of the fatty acid profiles of the offered food with those of the subsequently excreted feces indicated preferential assimilation of polyunsaturated fatty acids by E. superba. The analysis of lipid compositions has been applied successfully to reveal food web relationships in marine ecosystems. This trophic biomarker concept is based on observations that specific dietary lipid components, particularly fatty |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Dorothea Stübing Wilhelm Hagen Katrin Schmidt |
spellingShingle |
Dorothea Stübing Wilhelm Hagen Katrin Schmidt study on the Antarctic krill, Euphausia superba |
author_facet |
Dorothea Stübing Wilhelm Hagen Katrin Schmidt |
author_sort |
Dorothea Stübing |
title |
study on the Antarctic krill, Euphausia superba |
title_short |
study on the Antarctic krill, Euphausia superba |
title_full |
study on the Antarctic krill, Euphausia superba |
title_fullStr |
study on the Antarctic krill, Euphausia superba |
title_full_unstemmed |
study on the Antarctic krill, Euphausia superba |
title_sort |
study on the antarctic krill, euphausia superba |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.419.7560 http://www.aslo.org/lo/toc/vol_48/issue_4/1685.pdf |
long_lat |
ENVELOPE(12.917,12.917,-69.967,-69.967) ENVELOPE(7.000,7.000,-68.000,-68.000) |
geographic |
Antarctic Bellingshausen Sea Lazarev Lazarev Sea The Antarctic |
geographic_facet |
Antarctic Bellingshausen Sea Lazarev Lazarev Sea The Antarctic |
genre |
Antarc* Antarctic Antarctic Krill Bellingshausen Sea Euphausia superba ice algae Lazarev Sea |
genre_facet |
Antarc* Antarctic Antarctic Krill Bellingshausen Sea Euphausia superba ice algae Lazarev Sea |
op_source |
http://www.aslo.org/lo/toc/vol_48/issue_4/1685.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.419.7560 http://www.aslo.org/lo/toc/vol_48/issue_4/1685.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766051191681187840 |