Effects of piscivory on the fatty acid profiles and antioxidants of avian yolk: studies on eggs of the gannet, skua, pelican and cormorant

PF Surai, GR Bortolotti, AL Fidgett, JD Blount, BK Speake

Research output: Contribution to journalArticle

38 Citations (Scopus)

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).
Original languageEnglish
Pages (from-to)305 - 312
Number of pages8
JournalJournal of Zoology
Volume255
Publication statusPrint publication - 10 Oct 2001

Fingerprint

fish roe
Pelecanus
Phalacrocorax
arachidonic acid
Phalacrocorax auritus
fatty acid composition
antioxidants
omega-3 fatty acids
phospholipids
docosapentaenoic acid
eicosapentaenoic acid
docosahexaenoic acid
tocopherols
freshwater fish
diet
marine fish
vitamin E
polyunsaturated fatty acids
carotenoids
embryogenesis

Bibliographical note

643029

Keywords

  • Studies
  • Acid
  • Study
  • Antioxidants
  • Antioxidant
  • Yolk
  • Fatty Acid
  • Fatty
  • Egg
  • Effects
  • Effect
  • Avian

Cite this

Surai, PF ; Bortolotti, GR ; Fidgett, AL ; Blount, JD ; Speake, BK. / Effects of piscivory on the fatty acid profiles and antioxidants of avian yolk: studies on eggs of the gannet, skua, pelican and cormorant. In: Journal of Zoology. 2001 ; Vol. 255. pp. 305 - 312.
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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).",
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Effects of piscivory on the fatty acid profiles and antioxidants of avian yolk: studies on eggs of the gannet, skua, pelican and cormorant. / Surai, PF; Bortolotti, GR; Fidgett, AL; Blount, JD; Speake, BK.

In: Journal of Zoology, Vol. 255, 10.10.2001, p. 305 - 312.

Research output: Contribution to journalArticle

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