Stabilizing natural selection on the early expression of a secondary sexual trait in a passerine bird - Archive ouverte HAL
Article Dans Une Revue Journal of Evolutionary Biology Année : 2004

Stabilizing natural selection on the early expression of a secondary sexual trait in a passerine bird

Résumé

Natural selection is a central tenet of evolutionary theory, yet the estimation of the direction and intensity of selection remains problematic. Here, we assess the strength of selection on the early expression of a secondary sexual ornament, bill colour, in male European blackbirds (Turdus merula) using 5 years of capture‐mark‐recapture (CMR) data. The best‐fitting model consisted of a quadratic relationship between survival rate and bill colour, indicating stabilizing natural selection on the early expression of a secondary sexual trait. There was no evidence for sexual selection acting on bill colour in the first year. We suggest that the consideration of early selection and the adoption of refined statistical methods may reveal patterns of selection in the wild that have, as yet, remained undetected.
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Dates et versions

hal-02126368 , version 1 (01-01-2025)

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Arnaud Grégoire, Marina Préault, Frank Cézilly, M. J Wood, Roger Pradel, et al.. Stabilizing natural selection on the early expression of a secondary sexual trait in a passerine bird. Journal of Evolutionary Biology, 2004, 17 (5), pp.1152-1156. ⟨10.1111/j.1420-9101.2004.00756.x⟩. ⟨hal-02126368⟩
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