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- W1488646150 abstract "Early male arrival at breeding sites, or protandry, is thought to have evolved from intrasexual competition among males for access to mates or breeding resources. Males of polygynous species tend to be larger than females and have exaggerated secondary sexual traits. Additionally, such species show a high degree of protandry, suggesting that timing of arrival is sexually selected. Species showing limited sexual dimorphism and showing sexual monochromatism may be expected to show limited early male arrival. However, there are very few studies of migration timing of the sexes in such species because individuals cannot be readily identified to sex in the hand. In this study, we genetically sexed birds and found no evidence for early male arrival, for a population of migratory Song Sparrows Melospiza melodia. For our study population, males and females display limited sexual size dimorphism and are sexually monochromatic which is characteristic of the species. Fat scores for males were inversely associated with timing of arrival, whereas for females, larger-winged birds arrived sooner – suggesting that early migration timing may be selected for in both sexes." @default.
- W1488646150 created "2016-06-24" @default.
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- W1488646150 date "2007-04-30" @default.
- W1488646150 modified "2023-09-23" @default.
- W1488646150 title "Absence of protandry in the spring migration of a population of Song Sparrows Melospiza melodia" @default.
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- W1488646150 doi "https://doi.org/10.1111/j.1474-919x.2007.00692.x" @default.
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