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

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  • Borgstede, Matthias

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.

Suggested Citation

  • Borgstede, Matthias, 2019. "Is there a Trivers–Willard effect for parental investment? Modelling evolutionarily stable strategies using a matrix population model with nonlinear mating," Theoretical Population Biology, Elsevier, vol. 130(C), pages 74-82.
    • Handle: RePEc:eee:thpobi:v:130:y:2019:i:c:p:74-82
    DOI: 10.1016/j.tpb.2019.10.001
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    References listed on IDEAS

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    1. Pavard, Samuel & Branger, Frédéric, 2012. "Effect of maternal and grandmaternal care on population dynamics and human life-history evolution: A matrix projection model," Theoretical Population Biology, Elsevier, vol. 82(4), pages 364-376.
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