Is there a Trivers–Willard effect for parental investment? Modelling evolutionarily stable strategies using a matrix population model with nonlinear mating

Matthias Borgstede

Theoretical Population Biology, 2019, vol. 130, issue C, 74-82

Abstract: The Trivers–Willard hypothesis (TWH) states that parents in good condition preferentially produce the sex with a higher variation in reproductive success, whereas parents in bad condition favour the opposite sex. Theorists distinguish two variants of the TWH: (a) a biased sex-ratio at birth and (b) biased parental investment after birth. It has been argued before that the conditions stated by Trivers and Willard (good condition is inherited and affects reproductive success more strongly for one of the sexes) are sufficient for the sex-ratio version but insufficient for the investment version of the TWH. However, it has not yet been investigated how these conditions affect parental investment in high and low quality parents, depending on the life-cycle of a species.

Keywords: Trivers–Willard hypothesis; Parental investment; Evolutionary invasion analysis; Adaptive dynamics; Matrix population models (search for similar items in EconPapers)
Date: 2019
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Persistent link: https://EconPapers.repec.org/RePEc:eee:thpobi:v:130:y:2019:i:c:p:74-82

DOI: 10.1016/j.tpb.2019.10.001

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