ArticleScientific reports2022
Female bonobos show social swelling by synchronizing their maximum swelling and increasing bonding.
Article in Scientific reports, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed.
- A lethal incident during an intergroup encounter in bonobos.Scientific reports · 2026Article
- Bonobos and chimpanzees overlap in sexual behaviour patterns during social tension.Royal Society open science · 2025Article
- Love songs and serenades: a theoretical review of music and romantic relationships.Frontiers in psychology · 2024Article
- Same-sex sexual behaviour among mammals is widely observed, yet seldomly reported: Evidence from an online expert survey.PloS one · 2024Article
- More Than Just Kibbles: Keeper Familiarity and Food Can Affect Bonobo Behavior.Animals : an open access journal from MDPI · 2023Article
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6 authors.
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Abstract
Different Old World primates show conspicuous anogenital swelling, with the Maximum Swelling Phase (MSP) signaling the ovulatory phase. MSP synchronization between females has been linked to social dynamics. In bonobos, characterized by female dominance, MSP is not a fully reliable signal of fertility because it may cover anovulatory periods. We investigated whether bonobo females synchronized their MSP and whether this phenomenon was modulated by social factors. Data were collected at La Vallée des Singes (France). In the period 2009-2022, swelling cycles data were collected daily on bonobo females (N = 9). In the period 2018-2022, ethological data (aggression/affiliation/socio-sexual behaviors) were also collected. We found that: (i) females synchronized their MSP and most likely experienced MSP onset following the MSP onset in other females; (ii) synchronization increased as the years spent together by females increased; (iii) synchronization preferentially occurred between females that affiliated less; (iv) synchronization on the MSP was linked to increased female-female socio-sexual contacts, which probably favored MSP synchronization maintenance. Hence, in bonobos MSP can be modulated by social factors and its synchronization, possibly underlying autonomic contagion, might have been positively selected during evolution in relation to the benefits females obtain in terms of intra-group cohesion.
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