Fatty acid composition of the adipose tissue of polar bears and of their prey: ringed seals, bearded seals and harp seals
Polar bears Ursus maritimus are predators of phocid seals, but they also forage opportunistically on a variety of other species. In the Barents Sea—Svalbard area, their diet is thought to consist almost exclusively of ringed seals Phoca hispida, bearded seals Erignathus barbatus and harp seals P. gr...
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2003
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fttriple:oai:gotriple.eu:10670/1.10402/era.25592 2023-05-15T15:39:05+02:00 Fatty acid composition of the adipose tissue of polar bears and of their prey: ringed seals, bearded seals and harp seals Grahl-Nielsen, O. Lydersen, C. Wiig, Ø. Kovacs, K. Derocher, A.E. Andersen, M. 2003-01-01 https://doi.org/10.7939/R3SF2MF2G https://era.library.ualberta.ca/items/9c2a15a0-cb30-4943-a60c-80b4b66f9c43 en eng doi:10.7939/R3SF2MF2G 10670/1.10402/era.25592 https://era.library.ualberta.ca/items/9c2a15a0-cb30-4943-a60c-80b4b66f9c43 undefined ERA : Education and Research Archive envir geo Other https://vocabularies.coar-repositories.org/resource_types/c_1843/ 2003 fttriple https://doi.org/10.7939/R3SF2MF2G 2023-01-22T18:26:14Z Polar bears Ursus maritimus are predators of phocid seals, but they also forage opportunistically on a variety of other species. In the Barents Sea—Svalbard area, their diet is thought to consist almost exclusively of ringed seals Phoca hispida, bearded seals Erignathus barbatus and harp seals P. groenlandica. When a seal is killed, polar bears preferentially consume the blubber. The fatty acid (FA) compositions of the outer, middle and inner adipose layer of 18 polar bears were compared to each other and also with the FA composition of the blubber of their prey, represented by 10 ringed seals, 10 harp seals and 9 bearded seals. The composition of the FAs in the inner layer of the bear adipose tissue differed from the composition of the outer layer, and was also distinctly different from the composition of the blubber from the prey. Fifteen of the 28 FAs analysed were found in lower relative amounts in the polar bears than in any of the 3 seal species. Eight of the FAs were found in higher relative amounts in polar bears when compared to the 3 prey species. Only 5 of the FAs in polar bears were within the range of relative values found in the prey. This strongly suggests that polar bear adipose tissue has a unique FA composition that is not a straightforward mixture of what they consume, but rather is the result of selective processes prior to and during deposition of lipids in the tissue. Other/Unknown Material Barents Sea Erignathus barbatus Phoca hispida Svalbard Ursus maritimus Unknown Barents Sea Svalbard |
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Open Polar |
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English |
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envir geo Grahl-Nielsen, O. Lydersen, C. Wiig, Ø. Kovacs, K. Derocher, A.E. Andersen, M. Fatty acid composition of the adipose tissue of polar bears and of their prey: ringed seals, bearded seals and harp seals |
topic_facet |
envir geo |
description |
Polar bears Ursus maritimus are predators of phocid seals, but they also forage opportunistically on a variety of other species. In the Barents Sea—Svalbard area, their diet is thought to consist almost exclusively of ringed seals Phoca hispida, bearded seals Erignathus barbatus and harp seals P. groenlandica. When a seal is killed, polar bears preferentially consume the blubber. The fatty acid (FA) compositions of the outer, middle and inner adipose layer of 18 polar bears were compared to each other and also with the FA composition of the blubber of their prey, represented by 10 ringed seals, 10 harp seals and 9 bearded seals. The composition of the FAs in the inner layer of the bear adipose tissue differed from the composition of the outer layer, and was also distinctly different from the composition of the blubber from the prey. Fifteen of the 28 FAs analysed were found in lower relative amounts in the polar bears than in any of the 3 seal species. Eight of the FAs were found in higher relative amounts in polar bears when compared to the 3 prey species. Only 5 of the FAs in polar bears were within the range of relative values found in the prey. This strongly suggests that polar bear adipose tissue has a unique FA composition that is not a straightforward mixture of what they consume, but rather is the result of selective processes prior to and during deposition of lipids in the tissue. |
format |
Other/Unknown Material |
author |
Grahl-Nielsen, O. Lydersen, C. Wiig, Ø. Kovacs, K. Derocher, A.E. Andersen, M. |
author_facet |
Grahl-Nielsen, O. Lydersen, C. Wiig, Ø. Kovacs, K. Derocher, A.E. Andersen, M. |
author_sort |
Grahl-Nielsen, O. |
title |
Fatty acid composition of the adipose tissue of polar bears and of their prey: ringed seals, bearded seals and harp seals |
title_short |
Fatty acid composition of the adipose tissue of polar bears and of their prey: ringed seals, bearded seals and harp seals |
title_full |
Fatty acid composition of the adipose tissue of polar bears and of their prey: ringed seals, bearded seals and harp seals |
title_fullStr |
Fatty acid composition of the adipose tissue of polar bears and of their prey: ringed seals, bearded seals and harp seals |
title_full_unstemmed |
Fatty acid composition of the adipose tissue of polar bears and of their prey: ringed seals, bearded seals and harp seals |
title_sort |
fatty acid composition of the adipose tissue of polar bears and of their prey: ringed seals, bearded seals and harp seals |
publishDate |
2003 |
url |
https://doi.org/10.7939/R3SF2MF2G https://era.library.ualberta.ca/items/9c2a15a0-cb30-4943-a60c-80b4b66f9c43 |
geographic |
Barents Sea Svalbard |
geographic_facet |
Barents Sea Svalbard |
genre |
Barents Sea Erignathus barbatus Phoca hispida Svalbard Ursus maritimus |
genre_facet |
Barents Sea Erignathus barbatus Phoca hispida Svalbard Ursus maritimus |
op_source |
ERA : Education and Research Archive |
op_relation |
doi:10.7939/R3SF2MF2G 10670/1.10402/era.25592 https://era.library.ualberta.ca/items/9c2a15a0-cb30-4943-a60c-80b4b66f9c43 |
op_rights |
undefined |
op_doi |
https://doi.org/10.7939/R3SF2MF2G |
_version_ |
1766370519282614272 |