Effects of piscivory on the fatty acid profiles and antioxidants of avian yolk: studies on eggs of the gannet, skua, pelican and cormorant
Abstract Piscivorous birds consume diets which are rich in highly‐polyunsaturated n‐3 fatty acids; these play vital roles in embryonic development but are very susceptible to oxidative damage. The effects of such diets on the fatty acid composition and antioxidant content of the yolk were investigat...
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crwiley:10.1017/s0952836901001406 2024-06-02T08:05:16+00:00 Effects of piscivory on the fatty acid profiles and antioxidants of avian yolk: studies on eggs of the gannet, skua, pelican and cormorant Surai, Peter F. Bortolotti, Gary R. Fidgett, Andrea L. Blount, Jonathan D. Speake, Brian K. 2001 http://dx.doi.org/10.1017/s0952836901001406 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1017%2FS0952836901001406 https://onlinelibrary.wiley.com/doi/pdf/10.1017/S0952836901001406 https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1017/S0952836901001406 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Zoology volume 255, issue 3, page 305-312 ISSN 0952-8369 1469-7998 journal-article 2001 crwiley https://doi.org/10.1017/s0952836901001406 2024-05-03T12:06:05Z Abstract Piscivorous birds consume diets which are rich in highly‐polyunsaturated n‐3 fatty acids; these play vital roles in embryonic development but are very susceptible to oxidative damage. The effects of such diets on the fatty acid composition and antioxidant content of the yolk were investigated in the northern gannet Morus bassanus , the great skua Catharacta skua , the American white pelican Pelecanus erythrorhynchos and the double‐crested cormorant Phalacrocorax auritus . The phospholipid fraction of the eggs of these four species contained high proportions of the n‐3 fatty acid, docosahexaenoic acid, which formed 7.5–11.3% (w/w) of the fatty acids of this fraction. The presence of eicosapentaenoic and docosapentaenoic acids also contributed to the total n‐3 content of the phospholipid. The n‐6 polyunsaturate, arachidonic acid, formed between 8% and 19% (w/w) of the phospholipid fatty acids. For the pelican and cormorant, this is consistent with the consumption of freshwater fishes in which arachidonic acid may be a significant acyl constituent. This finding is, however, more difficult to explain for the gannet and skua which largely consume marine fish with a low arachidonic acid content. The yolks of all four species contained relatively high concentrations of vitamin E (90.2–302.3 μg g −1 wet yolk) which was mainly present as α‐tocopherol. The eggs of the pelican and cormorant were especially enriched in carotenoids (150.9 and 115.7 μg g −1 wet yolk, respectively). Article in Journal/Newspaper Catharacta skua Great skua Wiley Online Library Journal of Zoology 255 3 305 312 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Piscivorous birds consume diets which are rich in highly‐polyunsaturated n‐3 fatty acids; these play vital roles in embryonic development but are very susceptible to oxidative damage. The effects of such diets on the fatty acid composition and antioxidant content of the yolk were investigated in the northern gannet Morus bassanus , the great skua Catharacta skua , the American white pelican Pelecanus erythrorhynchos and the double‐crested cormorant Phalacrocorax auritus . The phospholipid fraction of the eggs of these four species contained high proportions of the n‐3 fatty acid, docosahexaenoic acid, which formed 7.5–11.3% (w/w) of the fatty acids of this fraction. The presence of eicosapentaenoic and docosapentaenoic acids also contributed to the total n‐3 content of the phospholipid. The n‐6 polyunsaturate, arachidonic acid, formed between 8% and 19% (w/w) of the phospholipid fatty acids. For the pelican and cormorant, this is consistent with the consumption of freshwater fishes in which arachidonic acid may be a significant acyl constituent. This finding is, however, more difficult to explain for the gannet and skua which largely consume marine fish with a low arachidonic acid content. The yolks of all four species contained relatively high concentrations of vitamin E (90.2–302.3 μg g −1 wet yolk) which was mainly present as α‐tocopherol. The eggs of the pelican and cormorant were especially enriched in carotenoids (150.9 and 115.7 μg g −1 wet yolk, respectively). |
format |
Article in Journal/Newspaper |
author |
Surai, Peter F. Bortolotti, Gary R. Fidgett, Andrea L. Blount, Jonathan D. Speake, Brian K. |
spellingShingle |
Surai, Peter F. Bortolotti, Gary R. Fidgett, Andrea L. Blount, Jonathan D. Speake, Brian K. Effects of piscivory on the fatty acid profiles and antioxidants of avian yolk: studies on eggs of the gannet, skua, pelican and cormorant |
author_facet |
Surai, Peter F. Bortolotti, Gary R. Fidgett, Andrea L. Blount, Jonathan D. Speake, Brian K. |
author_sort |
Surai, Peter F. |
title |
Effects of piscivory on the fatty acid profiles and antioxidants of avian yolk: studies on eggs of the gannet, skua, pelican and cormorant |
title_short |
Effects of piscivory on the fatty acid profiles and antioxidants of avian yolk: studies on eggs of the gannet, skua, pelican and cormorant |
title_full |
Effects of piscivory on the fatty acid profiles and antioxidants of avian yolk: studies on eggs of the gannet, skua, pelican and cormorant |
title_fullStr |
Effects of piscivory on the fatty acid profiles and antioxidants of avian yolk: studies on eggs of the gannet, skua, pelican and cormorant |
title_full_unstemmed |
Effects of piscivory on the fatty acid profiles and antioxidants of avian yolk: studies on eggs of the gannet, skua, pelican and cormorant |
title_sort |
effects of piscivory on the fatty acid profiles and antioxidants of avian yolk: studies on eggs of the gannet, skua, pelican and cormorant |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.1017/s0952836901001406 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1017%2FS0952836901001406 https://onlinelibrary.wiley.com/doi/pdf/10.1017/S0952836901001406 https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1017/S0952836901001406 |
genre |
Catharacta skua Great skua |
genre_facet |
Catharacta skua Great skua |
op_source |
Journal of Zoology volume 255, issue 3, page 305-312 ISSN 0952-8369 1469-7998 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1017/s0952836901001406 |
container_title |
Journal of Zoology |
container_volume |
255 |
container_issue |
3 |
container_start_page |
305 |
op_container_end_page |
312 |
_version_ |
1800750067289686016 |