ArticleBehavioral ecology : official journal of the International Society for Behavioral Ecology
Not leaving home: grandmothers and male dispersal in a duolocal human society.
Article in Behavioral ecology : official journal of the International Society for Behavioral Ecology. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed, 25 citations in OpenAlex.
- Jeans and language: kin networks and reproductive success are associated with the adoption of outgroup norms.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2024Article
- Sibling competition, dispersal and fitness outcomes in humans.Scientific reports · 2023Article
- Post-marital residence patterns and the timing of reproduction: evidence from a matrilineal society.Proceedings. Biological sciences · 2023Article
- Sex, age, and family structure influence dispersal behaviour after a forced migration.Evolutionary human sciences · 2023Article
- Communal breeding by women is associated with lower investment from husbands.Evolutionary human sciences · 2022Article
- Current ecology, not ancestral dispersal patterns, influences menopause symptom severity.Ecology and evolution · 2019Article
- The expendable male hypothesis.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2019Article
- Fathers favour sons, mothers don't discriminate: Sex-biased parental care in northwestern Tanzania.Evolutionary human sciences · 2019Article
- Kinship underlies costly cooperation in Mosuo villages.Royal Society open science · 2018Article
- Cooperation and the evolution of hunter-gatherer storytelling.Nature communications · 2017Article
- Parental investment in Tibetan populations does not reflect stated cultural norms.Behavioral ecology : official journal of the International Society for Behavioral EcologyArticle
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Authors and funding
5 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Models suggest that dispersal patterns will influence age- and sex-dependent helping behavior in social species. Duolocal social systems (where neither sex disperses and mating is outside the group) are predicted to be associated with mothers favoring sons over daughters (because the latter are in reproductive competition with each other). Other models predict daughter-biased investment when benefits of wealth to sons are less than daughters. Here, we test whether sex-biased investment is occurring in the duolocal Mosuo of southwestern China. Using demographic and observational data from Mosuo, we show support for both hypotheses, in that 1) males are more likely to disperse from their natal household if their mother dies, but females are not; 2) a large number of brothers increases the likelihood that both females and males disperse, whereas a large number of sisters only increases female dispersal; 3) mothers help daughters reproduce earlier and reduce death risk of daughter's children, but not sons or sons' children; 4) data on multiple paternity show that female reproductive success does not suffer from multiple partners, and in males multiple mates are associated with higher reproductive success, indicating that mothers can benefit from investing in their sons' mating effort; and 5) gift decisions reveal similar kin effects to those shown in the demographic data, with mothers helping adult daughters and adult sons equally, but helping only her daughter's children, not her son's children. Mosuo mothers may invest resources for parental investment in their daughters and their offspring, while investing in their sons mating effort.
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