15 N/ 14 N and 13 C/ 12 C in Weddell Sea Birds, Seals, and Fish: Implications for Diet and Trophic Structure
delta-C-13, delta-N-15, and C/N were measured for each of 247 muscle tissue samples from 12 bird, 4 seal, and 4 fish species collected in the Weddell Sea primarily during March 1986. delta-C-13 values ranged from -31.3 to -22.0 parts per thousand and, in the case of fish and seal samples, varied inv...
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1992
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ftunisfloridatam:oai:digitalcommons.usf.edu:msc_facpub-1038 2024-09-15T17:48:45+00:00 15 N/ 14 N and 13 C/ 12 C in Weddell Sea Birds, Seals, and Fish: Implications for Diet and Trophic Structure Rau, Greg H. Ainley, David G. Bengston, John L. Torres, Joseph J. Hopkins, Thomas L. 1992-07-01T07:00:00Z application/pdf https://digitalcommons.usf.edu/msc_facpub/39 https://digitalcommons.usf.edu/context/msc_facpub/article/1038/viewcontent/m084p001.pdf unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/msc_facpub/39 https://digitalcommons.usf.edu/context/msc_facpub/article/1038/viewcontent/m084p001.pdf http://creativecommons.org/licenses/by/3.0/ Marine Science Faculty Publications Life Sciences Marine Biology article 1992 ftunisfloridatam 2024-08-23T08:09:14Z delta-C-13, delta-N-15, and C/N were measured for each of 247 muscle tissue samples from 12 bird, 4 seal, and 4 fish species collected in the Weddell Sea primarily during March 1986. delta-C-13 values ranged from -31.3 to -22.0 parts per thousand and, in the case of fish and seal samples, varied inversely with C/N. This implied that lipid concentration significantly influenced these vertebrate delta-C-13 measurements. No such relationship was found between C/N and delta-N-15, where the latter values ranged from +4.4 to +11.2 parts per thousand. with considerable overlap among many of the taxonomic groups measured. Notable exceptions to this were found in the Wilson's storm-petrel and the Kerguelan petrel, among which elevated delta-N-15 values of some individuals probably reflected feeding outside of the Weddell Sea. Significant feeding on vertebrate biomass was indicated by the N-15 enrichment of the southern giant fulmar and several snow petrel individuals. Some diet separation among crabeater, Antarctic fur, leopard, and Ross seals was also evident. Nevertheless, the overlap in delta-N-15 among most Weddell Sea vertebrates, coupled with an observed range of vertebrate values that was considerably narrower than that of their potential prey, supports the hypothesis that many of these higher consumers share a small number of common food resources and trophic levels. Article in Journal/Newspaper Antarc* Antarctic Snow Petrel Weddell Sea Digital Commons University of South Florida (USF) |
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Digital Commons University of South Florida (USF) |
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ftunisfloridatam |
language |
unknown |
topic |
Life Sciences Marine Biology |
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Life Sciences Marine Biology Rau, Greg H. Ainley, David G. Bengston, John L. Torres, Joseph J. Hopkins, Thomas L. 15 N/ 14 N and 13 C/ 12 C in Weddell Sea Birds, Seals, and Fish: Implications for Diet and Trophic Structure |
topic_facet |
Life Sciences Marine Biology |
description |
delta-C-13, delta-N-15, and C/N were measured for each of 247 muscle tissue samples from 12 bird, 4 seal, and 4 fish species collected in the Weddell Sea primarily during March 1986. delta-C-13 values ranged from -31.3 to -22.0 parts per thousand and, in the case of fish and seal samples, varied inversely with C/N. This implied that lipid concentration significantly influenced these vertebrate delta-C-13 measurements. No such relationship was found between C/N and delta-N-15, where the latter values ranged from +4.4 to +11.2 parts per thousand. with considerable overlap among many of the taxonomic groups measured. Notable exceptions to this were found in the Wilson's storm-petrel and the Kerguelan petrel, among which elevated delta-N-15 values of some individuals probably reflected feeding outside of the Weddell Sea. Significant feeding on vertebrate biomass was indicated by the N-15 enrichment of the southern giant fulmar and several snow petrel individuals. Some diet separation among crabeater, Antarctic fur, leopard, and Ross seals was also evident. Nevertheless, the overlap in delta-N-15 among most Weddell Sea vertebrates, coupled with an observed range of vertebrate values that was considerably narrower than that of their potential prey, supports the hypothesis that many of these higher consumers share a small number of common food resources and trophic levels. |
format |
Article in Journal/Newspaper |
author |
Rau, Greg H. Ainley, David G. Bengston, John L. Torres, Joseph J. Hopkins, Thomas L. |
author_facet |
Rau, Greg H. Ainley, David G. Bengston, John L. Torres, Joseph J. Hopkins, Thomas L. |
author_sort |
Rau, Greg H. |
title |
15 N/ 14 N and 13 C/ 12 C in Weddell Sea Birds, Seals, and Fish: Implications for Diet and Trophic Structure |
title_short |
15 N/ 14 N and 13 C/ 12 C in Weddell Sea Birds, Seals, and Fish: Implications for Diet and Trophic Structure |
title_full |
15 N/ 14 N and 13 C/ 12 C in Weddell Sea Birds, Seals, and Fish: Implications for Diet and Trophic Structure |
title_fullStr |
15 N/ 14 N and 13 C/ 12 C in Weddell Sea Birds, Seals, and Fish: Implications for Diet and Trophic Structure |
title_full_unstemmed |
15 N/ 14 N and 13 C/ 12 C in Weddell Sea Birds, Seals, and Fish: Implications for Diet and Trophic Structure |
title_sort |
15 n/ 14 n and 13 c/ 12 c in weddell sea birds, seals, and fish: implications for diet and trophic structure |
publisher |
Digital Commons @ University of South Florida |
publishDate |
1992 |
url |
https://digitalcommons.usf.edu/msc_facpub/39 https://digitalcommons.usf.edu/context/msc_facpub/article/1038/viewcontent/m084p001.pdf |
genre |
Antarc* Antarctic Snow Petrel Weddell Sea |
genre_facet |
Antarc* Antarctic Snow Petrel Weddell Sea |
op_source |
Marine Science Faculty Publications |
op_relation |
https://digitalcommons.usf.edu/msc_facpub/39 https://digitalcommons.usf.edu/context/msc_facpub/article/1038/viewcontent/m084p001.pdf |
op_rights |
http://creativecommons.org/licenses/by/3.0/ |
_version_ |
1810290267566112768 |