From Chris Whitfield
The article implies that the sexual selection theory is wrong. But broad adaptive behaviour and sexual selection are not mutually exclusive.
A peacock grows a large tail, that could be the admission price to the big boys’ club: adaptive behaviour. And a peahen selects him because his tail is bigger: sexual selection. An oestrous baboon scatters her favours among the lower-ranking males during early oestrus: socially adaptive. And narrows her search at the time of highest fertility to the alpha males: sexual selection.
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