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Stressed mothers lay eggs with high corticosterone levels which produce low-quality offspring.
Organisms frequently encounter stressful ecological conditions. In vertebrates, a major mechanism of physiological response to stress is mediated by the hypothalamic-pituitary-adrenal axis andExpand
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Immunocompetence of nestling barn swallows in relation to brood size and parental effort
1. Intra-brood competition and parental feeding effort are considered important determinants of survival of offspring in altricial bird species because they affect accumulation of fat reserves byExpand
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Immunocompetence, ornamentation, and viability of male barn swallows (Hirundo rustica).
Immunocompetence (i.e., the ability to produce an immune response to pathogens) can be predicted to influence the chances that organisms have to survive and reproduce. In this study we simulated aExpand
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Habitat structure and the evolution of bird song: a meta-analysis of the evidence for the acoustic adaptation hypothesis
Summary 1Habitat structure has been considered as a main factor shaping the evolution of bird song acoustics. 2Based on expected differential patterns of sound degradation in different habitats,Expand
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Challenging claims in the study of migratory birds and climate change
Recent shifts in phenology in response to climate change are well established but often poorly understood. Many animals integrate climate change across a spatially and temporally dispersed annualExpand
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Effects of elevated egg corticosterone levels on behavior, growth, and immunity of yellow-legged gull (Larus michahellis) chicks
Eggs of vertebrates contain steroid hormones of maternal origin that may influence offspring performance. Recently, it has been shown that glucocorticoids, which are the main hormones mediating theExpand
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Previous studies of the socially monogamous barn swallow (Hirundo rustica) have shown that males that most frequently engage in extrapair copulations and whose partners are least involved inExpand
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Song correlates with social context, testosterone and body condition in male barn swallows
Bird song, like many other male secondary sexual characters, may have evolved as intra- or inter-sexual signals of male phenotypic quality. The hypotheses that song rate and song features reflectExpand
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Better red than dead: carotenoid-based mouth coloration reveals infection in barn swallow nestlings
Nestling birds solicit food from their parents by displaying their open brightly coloured gapes. Carotenoids affect gape colour, but also play a central role in immunostimulation. Therefore, weExpand
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