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	Author	Angelier Frédéric, Wingfield John C, Weimerskirch Henri, Chastel Olivier,
	Title	Hormonal correlates of individual quality in a long-lived bird: a test of the 'corticosterone-fitness hypothesis'.			Type	Journal Article
	Year	2010	Publication	Biology letters	Abbreviated Journal
	Volume	6	Issue	6	Pages	846 -9
	Keywords	Animals, Birds, Birds: blood, Birds: physiology, Breeding, Corticosterone, Corticosterone: blood, Female, Genetic Fitness, Male, Models, Biological, Reproduction, Reproduction: physiology, Seasons,
	Abstract	Measuring individual quality in vertebrates is difficult. Focusing on allostasis mechanisms may be useful because they are functionally involved in the ability of an individual to survive and reproduce in its environment. Thus, a rise in stress hormones levels (corticosterone) occurs when an organism has to cope with challenging environmental conditions. This has recently led to the proposal of the 'cort-fitness hypothesis', which suggests that elevated baseline corticosterone levels should be found in individuals of poor quality that have difficulty coping with their environment. We tested this hypothesis by comparing an integrative measure of individual quality to baseline corticosterone in black-browed albatrosses (Thalassarche melanophrys). We found that individual baseline corticosterone levels were related to individual quality and highly repeatable from one breeding season to the next. Importantly, this relationship was found in males, but not in females. Therefore, we suggest that the relationship between quality and baseline corticosterone levels may depend on the environmental and energetic constraints that individuals have to cope with.
	Programme	109
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	Publisher		Place of Publication		Editor
	Language		Summary Language		Original Title
	Series Editor		Series Title		Abbreviated Series Title
	Series Volume		Series Issue		Edition
	ISSN	1644-7700	ISBN		Medium
	Area		Expedition		Conference
	Notes				Approved	yes
	Call Number				Serial	445
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