Feb 23, 2015

Fecundity selection theory: concepts and evidence

BioRxiv : the Preprint Server for Biology
Daniel Pincheira-Donoso, John Hunt

Abstract

Fitness results from the optimal balance between survival, mating success and fecundity. The interactions between these three components of fitness vary importantly depending on the selective context, from positive covariation between them, to antagonistic pleiotropic relationships when fitness increases in one reduce fitness of others. Therefore, elucidating the routes through which selection shapes life history and phenotypic adaptations via these fitness components is of primary significance to understand ecological and evolutionary dynamics. However, while the fitness components mediated by natural (survival) and sexual (mating success) selection have extensively been debated from most possible perspectives, fecundity selection remains considerably less studied. Here, we review the theory, evidence and implications of fecundity selection as a driver of sex-specific adaptive evolution. Based on accumulating literature on the life-history, phenotypic and ecological aspects of fecundity, we ( i ) suggest that ‘fecundity’ is restricted to refer to brood size per reproductive episode, while ‘annual’ and ‘lifetime fecundity’ should not be used interchangeably with ‘fecundity’ as they represent different life history parameters; (...Continue Reading

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Mentioned in this Paper

Fertility
Synapsin I
Calcium
Acclimatization
Spatial Distribution
Protein iii
Sexual Dimorphism
Adaptation
Literature
Aves

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