کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2416920 1104302 2011 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Social niches and sex assortment: uncovering the developmental ecology of brown-headed cowbirds, Molothrus ater
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک علوم دامی و جانورشناسی
پیش نمایش صفحه اول مقاله
Social niches and sex assortment: uncovering the developmental ecology of brown-headed cowbirds, Molothrus ater
چکیده انگلیسی

Variation in individual interaction patterns creates different social niches. Social niches afford differential exposure to social information that individuals utilize to develop species-typical behaviours. Brown-headed cowbirds depend on social interaction to develop competent reproductive behaviour. We used a fission–fusion paradigm to perturb two flocks of birds: one adult flock (N = 38) and one juvenile flock (N = 24). We split the two flocks, then recombined them while recording the frequency of individual approaches. Both adult and juvenile females maintained stable social niches, but males did not. Females maintained equivalent levels of gregariousness and attractiveness across perturbations. Juvenile females maintained the highest levels of sex assortment. The consistency of female niche construction may be explained by females’ reliance on interaction with other females to assess males. Early sex assortment may also foster the development of social preferences and influence reproductive choices.


► Juvenile and adult flocks of brown-headed cowbirds were perturbed using a fission–fusion procedure.
► Females showed high repeatability in gregariousness and attractiveness.
► Adult female gregariousness was correlated with their attractiveness.
► Juvenile females maintained higher levels of sex assortment than adult females.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Animal Behaviour - Volume 82, Issue 5, November 2011, Pages 1015–1022
نویسندگان
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