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Density fluctuations represent a key process maintaining personality variation in a wild passerine bird [Ecology Letters]

Keywords : competition, coping styles, density-dependent selection, fluctuating selection, great tit, Parus major, personality, selection gradient, temperament

par Frédéric Magné - publié le

Heritable personality variation is subject to fluctuating selection in many animal taxa ; a major unresolved question is why this is the case. A parsimonious explanation must involve a general ecological process : a likely candidate is the omnipresent spatiotemporal variation in conspecific density. We tested whether spatiotemporal variation in density within and among nest box plots of great tits (Parus major) predicted variation in selection acting on exploratory behaviour (n = 48 episodes of selection).(...)

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