What question did this study set out to answer?

The study aims to examine how parental investment in offspring sex ratio varies with parental condition across different kinship systems.

May 25, 2026Behavioral Ecology

Testing the Trivers-Willard hypothesis among groups of contrasting kinship systems

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Authors

QHQiao-Qiao HeShenyang Normal University BZBaisensen ZhangShenyang Normal University CFChang FuChinese Academy of Medical Sciences & Peking Union Medical College

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Implication

Randomized trial tests offspring sex ratio influence by parental condition in contrasting kinship systems, suggesting varying effects across ecological contexts.

Key Points

The study aims to examine how parental investment in offspring sex ratio varies with parental condition across different kinship systems.
Analyzed data from 2,684 adults regarding offspring information, income, occupation, and education.
Utilized Generalized Linear Models (GLMs) with a binomial distribution and logit link function.
Exploited contrasting kinship systems of the Pumi and Han in western China.
Partial support for the Trivers-Willard hypothesis observed in the Han kinship system.
Evidence that kinship systems may complicate or obscure Trivers-Willard effects noted in the Pumi.
Variability in the importance of parental condition measures identified across different ecological settings.

Cite This Study

He et al. (2026) studied this question.

synapsesocial.com/papers/6a13e8520e02ee3982d33137 https://doi.org/10.1093/beheco/arag056

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Implication

Randomized trial tests offspring sex ratio influence by parental condition in contrasting kinship systems, suggesting varying effects across ecological contexts.

Testing the Trivers-Willard hypothesis among groups of contrasting kinship systems

Discussion

Member takes

Implication

Key Points

Cite This Study

Testing the Trivers-Willard hypothesis among groups of contrasting kinship systems

Discussion

Member takes

Implication

Key Points

Cite This Study

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