Condition-dependent genetic benefits of extrapair fertilization in female blue titsCyanistes caeruleus
نویسندگان
چکیده
منابع مشابه
Male infertility, female fertility and extrapair copulations.
Females that are socially bonded to a single male, either in a social monogamy or in a social polygyny, are often sexually polyandrous. Extrapair copulations (EPC) have often been suggested or rejected, on both empirical and theoretical grounds, as an important mechanism that enables females to avoid fertility risks in case their socially bonded male is infertile. Here, we explore this possibil...
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Females of a number of bird species occasionally have been recorded exchanging copulations directly for food or for access to food resources (Lack 1940, Brown 1967). For example, Wolf (1975) found that male Purple-throated Caribs (Eulampis jugularis) defend groups of flowers from conspecifics but allow females access in exchange for copulations. Similarly, in monogamous Red-billed Gulls (Larus ...
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Michael K. Schwartz, Daryl J. Boness, Catherine M. Schaeff, Patricia Majluf, Elizabeth A. Perry, and Robert C. Fleischer ^Department of Zoological Research, National Zoological Park, Smithsonian Institution, Washington, DC 20008, USA, ^Department of Biology, American University, 4400 Massachusetts Avenue, Washington, DC 20016, USA, and Wildlife Conservation Society, Paul de Beaudiez 520, Lima 2...
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In several studies of natural populations of birds, the heritability of body size estimated by parent-offspring regression has been lower when offspring have developed in poor feeding regimens than when they developed in good feeding regimens. This has led to the suggestion that adaptation under poor regimens may be constrained by lack of genetic variation. We examined the influence of environm...
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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: Journal of Evolutionary Biology
سال: 2008
ISSN: 1010-061X,1420-9101
DOI: 10.1111/j.1420-9101.2008.01578.x