期刊
BIOLOGY LETTERS
卷 7, 期 1, 页码 101-104出版社
ROYAL SOC
DOI: 10.1098/rsbl.2010.0531
关键词
bird song; plumage; resource allocation
Empirical evidence is mixed for interspecific trade-offs in investment among sexually selected traits. One important reason may be the way resources are allocated among species. Consider a set of species that obtains the same fitness pay-off for investment in song or plumage. Simulations where resources were normally distributed among species revealed significant trade-offs between song and plumage ((x) over bar +/- s.d. of r = -0.54 +/- 0.06). However, simulations where resources were distributed in a negative binomial fashion usually produced positive correlations (r = 0.11 +/- 0.09). Repeating simulations on three published studies that concomitantly quantified elaboration of song and plumage indicated that trade-offs are likely, although these analyses make assumptions that require further evaluation. Moreover, there are currently too few empirical distributions to make generalizations about the likelihood of interspecific trade-offs in sexually selected traits.
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