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Unifying quantitative life-history theory and field endocrinology to assess prudent parenthood in a long-lived seabird

Evolutionary Ecology Research

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Abstract

Question: Can field measurements of stress hormones help us to assess the prudent parent hypothesis in a long-lived seabird? Organism: Black-legged kittiwake, Rissa tridactyla. Location: Duck and Gull Islands, Cook Inlet, Alaska, Methods: We examined the statistical relationship between the stress hormone corticosterone and mortality in black-legged kittiwakes. We built a demographic model of the kittiwake life cycle to determine whether the mortality rates associated with persisting in a breeding attempt despite high corticosterone caused the birds to sacrifice more lifetime reproductive output than they gain from one year's breeding. Results: The probability of apparent mortality increased with corticosterone, suggesting some birds incurred increased mortality risk for the sake of breeding. For Duck Island (low reproductive success), it appears birds sacrificed more lifetime reproductive success than a prudent parent would. On Gull Island, it appears most but possibly not all birds were behaving in ways consistent with theory, although definitive statements require larger samples of highly stressed birds. ?? 2010 William H. Satterthwaite.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Unifying quantitative life-history theory and field endocrinology to assess prudent parenthood in a long-lived seabird
Series title:
Evolutionary Ecology Research
Volume
12
Issue:
6
Year Published:
2010
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Evolutionary Ecology Research
First page:
779
Last page:
792
Number of Pages:
14