ArticleAmerican journal of biological anthropology2023
Ecology and age, but not genetic ancestry, predict fetal loss in a wild baboon hybrid zone.
Article in American journal of biological anthropology, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Understanding Climate Change Threats to Vertebrate Wildlife by Studying Ecoimmunology Across Biological Scales.Integrative and comparative biology · 2025Review
- Testing early life effects frameworks: developmental constraints and adaptive response hypotheses do not explain fertility outcomes in wild female baboons.Proceedings. Biological sciences · 2025Article
- Validating enzyme immunoassays for non-invasive reproductive hormone monitoring in Temminck's pangolin.Conservation physiology · 2024Article
- Investigating the unaccounted ones: insights on age-dependent reproductive loss in a viviparous fly.Frontiers in ecology and evolution · 2023Article
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Authors and funding
7 authors.
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Abstract
objectivesPregnancy failure represents a major fitness cost for any mammal, particularly those with slow life histories such as primates. Here, we quantified the risk of fetal loss in wild hybrid baboons, including genetic, ecological, and demographic sources of variance. We were particularly interested in testing the hypothesis that hybridization increases fetal loss rates. Such an effect would help explain how baboons may maintain genetic and phenotypic integrity despite interspecific gene flow. MATERIALS AND
methodsWe analyzed outcomes for 1020 pregnancies observed over 46 years in a natural yellow baboon-anubis baboon hybrid zone. Fetal losses and live births were scored based on records of female reproductive state and the appearance of live neonates. We modeled the probability of fetal loss as a function of a female's genetic ancestry (the proportion of her genome estimated to be descended from anubis [vs. yellow] ancestors), age, number of previous fetal losses, dominance rank, group size, climate, and habitat quality using binomial mixed effects models.
resultsFemale genetic ancestry did not predict fetal loss. Instead, the risk of fetal loss is elevated for very young and very old females. Fetal loss is most robustly predicted by ecological factors, including poor habitat quality prior to a home range shift and extreme heat during pregnancy. DISCUSSION: Our results suggest that gene flow between yellow and anubis baboons is not impeded by an increased risk of fetal loss for hybrid females. Instead, ecological conditions and female age are key determinants of this component of female reproductive success.
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