Sexual selection and ecological generalism are correlated in antbirds

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Sexual selection and ecological generalism are correlated in antbirds.

Sexual selection is thought to counteract natural selection on the grounds that secondary sexual traits are inherently costly and evolve at the expense of naturally selected traits. It is therefore commonly predicted that increased sexual selection is associated with decreased physiological tolerance or ecological plasticity. Using phylogenetic comparative methods, we test this prediction by ex...

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Sexual selection is positively associated with ecological generalism among agamid lizards.

Natural and sexual selection shape the evolution of species but the interplay between them is poorly understood. Two phylogenetic studies on birds have suggested that species with greater sexual dichromatism have a broader habitat use. We show that in agamid lizards, species with more elaborate secondary sexual traits are also ecologically more opportunistic. Species with greater dimorphism in ...

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Sexual selection and conflict as engines of ecological diversification.

Ecological diversification presents an enduring puzzle: how do novel ecological strategies evolve in organisms that are already adapted to their ecological niche? Most attempts to answer this question posit a primary role for genetic drift, which could carry populations through or around fitness "valleys" representing maladaptive intermediate phenotypes between alternative niches. Sexual select...

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Sexual selection and the detection of ecological speciation

Context: Ecological speciation is commonly inferred with evidence of the parallel evolution of pre-mating isolation: individuals from populations in similar environments show higher mating success in laboratory experiments than do individuals from different environments. Critically, this should hold even for mating crosses among populations that are from different locations that represent indep...

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Ecological divergence and sexual selection drive sexual size dimorphism in New World pitvipers (Serpentes: Viperidae).

Hypotheses for the origin and maintenance of sexual size dimorphism (SSD) fall into three primary categories: (i) sexual selection on male size, (ii) fecundity selection on female size and (iii) ecological selection for gender-specific niche divergence. We investigate the impact of these forces on SSD evolution in New World pitvipers (Crotalinae). We constructed a phylogeny from up to eight gen...

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ژورنال

عنوان ژورنال: Journal of Evolutionary Biology

سال: 2009

ISSN: 1010-061X,1420-9101

DOI: 10.1111/j.1420-9101.2008.01678.x