ArticleProceedings. Biological sciences2013
Genetic relatedness to sisters' children has been underestimated.
Article in Proceedings. Biological sciences, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
What it found
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Who cites it
8 citing papers in PubMed.
- Evidence for dynastic succession among early Celtic elites in Central Europe.Nature human behaviour · 2024Article
- The expendable male hypothesis.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2019Article
- A worldwide view of matriliny: using cross-cultural analyses to shed light on human kinship systems.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2019Article
- Lineal kinship organization in cross-specific perspective.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2019Article
- One piece of the matrilineal puzzle: the socioecology of maternal uncle investment.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2019Article
- Inclusive fitness for in-laws.Biology letters · 2018Article
- Communal breeding promotes a matrilineal social system where husband and wife live apart.Proceedings. Biological sciences · 2013Article
- Not leaving home: grandmothers and male dispersal in a duolocal human society.Behavioral ecology : official journal of the International Society for Behavioral EcologyArticle
Corrections and comments
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Authors and funding
1 author.
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No grant is acknowledged in the PubMed record.
Abstract
Males of many species help in the care and provisioning of offspring, and these investments often correlate with genetic relatedness. For example, many human males invest in the children of sisters, and this is especially so where men are less likely to share genes with children of wives. Although this makes qualitative sense, it has been difficult to support quantitatively. The prevailing model predicts investment in children of sisters only when paternity confidence falls below 0.268. This value is often seen as too low to be credible; so investment in sisters' children represents an unsolved problem. I show here that the prevailing model rests on a series of restrictive assumptions that underestimate relatedness to sisters' children. For this reason, it understates the fitness payoff to men who invest in these children. This effect can be substantial, especially in societies with low confidence in paternity. But this effect cannot be estimated solely from confidence in paternity. One must also estimate the probability that two siblings share the same father.
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