Absence of status signalling by structurally based ultraviolet plumage in wintering blue tits (Cyanistes caeruleus)
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چکیده
منابع مشابه
Heterozygosity-based assortative mating in blue tits (Cyanistes caeruleus): implications for the evolution of mate choice.
The general hypothesis of mate choice based on non-additive genetic traits suggests that individuals would gain important benefits by choosing genetically dissimilar mates (compatible mate hypothesis) and/or more heterozygous mates (heterozygous mate hypothesis). In this study, we test these hypotheses in a socially monogamous bird, the blue tit (Cyanistes caeruleus). We found no evidence for a...
متن کاملWithin-population variation in prevalence and lineage distribution of avian malaria in blue tits, Cyanistes caeruleus.
The development of molecular genetic screening techniques for avian blood parasites has revealed many novel aspects of their ecology, including greatly elevated diversity and complex host-parasite relationships. Many previous studies of malaria in birds have treated single study populations as spatially homogeneous with respect to the likelihood of transmission of malaria to hosts, and we have ...
متن کاملPlumage yellowness predicts foraging ability in the blue tit Cyanistes caeruleus
Carotenoid-based coloration in adult birds has been often regarded as an honest signal of individual quality. However, few studies have demonstrated a link between carotenoid display and the quantity or quality of resources provided to the offspring. The present study investigated the expression of a carotenoid-based ornament, the breast plumage yellowness of the blue tit Cyanistes caeruleus, i...
متن کاملBreeding performance of blue tits (Cyanistes caeruleus) and great tits (Parus major) in a heavy metal polluted area.
We compared heavy metal levels, calcium levels, breeding parameters and condition of nestling and adult Cyanistes caeruleus and Parus major along a heavy metal pollution gradient. Both species started laying earlier and showed inferior nestling growth and smaller fledging probability in the polluted areas, which are phenologically advanced in spring due to sparse forests. The major inter-specif...
متن کاملLow Cross-Sex Genetic Correlation in Carotenoid-Based Plumage Traits in the Blue Tit Nestlings (Cyanistes caeruleus)
In some bird species, both adult and juvenile individuals are often brightly coloured. It has been commonly assumed that identical plumage colouration present in both sexes results from strong intersexual genetic correlations in colour-related traits. Here, we aimed at testing this hypothesis in juvenile individuals and looked at genetic parameters describing carotenoid-based colouration of blu...
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ژورنال
عنوان ژورنال: Behavioral Ecology and Sociobiology
سال: 2007
ISSN: 0340-5443,1432-0762
DOI: 10.1007/s00265-007-0433-z