Predicting the direction of sexual selection

摘要: Our current understanding of the operation sexual selection is predicated on a sex difference in parental investment, which favours one becoming limiting and choosy over mates, other competitive nonchoosy. This reflected operational ratio (OSR), sexually receptive males to females, considered be fundamental importance predicting direction selection. Difficulties measuring OSR directly have led use potential reproductive rates (PRR) as measure level investment offspring females. Several recent studies emphasized that factors, such variation mate quality differences mortality patterns, also influence However, yet there has been no attempt form comprehensive theory roles. Here we show neither nor PRR most fundamentally important determinant roles, they are not interchangeable. Instead, cost single breeding strong direct effect competition choosiness well consistent relationships both PRR. life history based approach choice yields simple, testable predictions lack either mutual choice.