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Dynamics of food availability, body condition and physiological stress response in breeding Black‐legged Kittiwakes
1. The seasonal dynamics of body condition (BC), circulating corticosterone levels (baseline, BL) and the adrenocortical response to acute stress (SR) were examined in long-lived Black-leggedExpand
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Corticosterone facilitates begging and affects resource allocation in the black-legged kittiwake
Parent black-legged kittiwakes (Rissa tridactyla) and their dependent chicks respond to food shortages by increasing circulating levels of corticosterone. To examine the behavioral significance ofExpand
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Dietary restriction causes chronic elevation of corticosterone and enhances stress response in red-legged kittiwake chicks
Abstract. Release of corticosterone in hungry kittiwake chicks facilitates begging and allows them to restore depleted energy reserves by increasing parental food provisioning. However, in order toExpand
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Endocrine Responses to Unpredictable Environmental Events: Stress or Anti-Stress Hormones?1
Abstract In addition to seasonal changes in morphology, physiology and behavior that occur in predictable annual cycles, there are facultative responses to unpredictable events known as labile (i.e.,Expand
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Benefits and costs of increased levels of corticosterone in seabird chicks
Seabird chicks respond to food shortages by increasing corticosterone (cort) secretion, which is probably associated with fitness benefits and costs. To examine this, we experimentally increasedExpand
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A supergene determines highly divergent male reproductive morphs in the ruff
Three strikingly different alternative male mating morphs (aggressive 'independents', semicooperative 'satellites' and female-mimic 'faeders') coexist as a balanced polymorphism in the ruff,Expand
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Food availability and population processes: severity of nutritional stress during reproduction predicts survival of long‐lived seabirds
Summary 1. Life-history theory predicts a trade-off between costs of current reproduction and future survival of individuals. Studies of short-lived animals in general support this prediction.Expand
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Stress hormones link food availability and population processes in seabirds
Catastrophic population declines in marine top predators in the northern Pacific have been hypothesized to result from nutritional stress affecting reproduction and survival of individuals. However,Expand
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Resource allocation in breeding seabirds: responses to fluctuations in their food supply
In the vicinity of the Pribilof Islands in the Bering Sea, abundance of food available to surface-foraging seabirds was greater during the chick-rearing period in 1988 than in 1987, whereas abundanceExpand
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Seabirds as indicators of food web structure and ecosystem variability: qualitative and quantitative diet analyses using fatty acids
The dynamics of predator-prey relationships, the structure of food webs, and the forag- ing behavior of individuals are critical to understanding animal ecology, interactions of predators with theirExpand
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