Pathways linking female personality with reproductive success are trait and year-specific

Bert Thys, Marcel Eens, Rianne Pinxten & Arne Iserbyt
Personality (i.e. among-individual variation in average behavior) often covaries with fitness, but how such personality-fitness relationships come about is poorly understood. Here, we explore potential mechanisms by which two female personality traits (female-female aggression and female nest defense as manifested by hissing behavior) were linked with annual reproductive success in a population of great tits (Parus major), a socially monogamous species with biparental care. We hypothesized that personality-related differences in reproductive success result from variation...
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