Evidence map›Paper›PMID 31903634›Full record

ArticleAmerican journal of primatology2020

Adolescent male chimpanzees (Pan troglodytes) form social bonds with their brothers and others during the transition to adulthood.

Aaron A Sandel, Kevin E Langergraber, John C Mitani

Abstract read
In one paragraph

Article in American journal of primatology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

15 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors.

Aaron A SandelDepartment of Anthropology, University of Texas, Austin, Texas.ORCID 0000-0003-3060-5310
Kevin E LangergraberSchool of Human Evolution and Social Change, Arizona State University, Tempe, Arizona.
John C MitaniDepartment of Anthropology, University of Michigan, Ann Arbor, Michigan.ORCID 0000-0001-7042-5854

Funding

Cumulative Life Course Effects on Aging and Health in a Long-Lived Primate ModelR37AG049395 · NIA · UNIVERSITY OF NEW MEXICO · PI Elizabeth Vinson Lonsdorf, Melissa Emery Thompson · 2022 to 2026
$3.2M
Biodemography of Aging in Wild ChimpanzeesR01AG049395 · NIA · UNIVERSITY OF NEW MEXICO · PI MITANI, JOHN CARY, ROSATI, ALEXANDRA G · 2015 to 2019
$2.9M
Horace H. Rackham School of Graduate Studies, University of MichiganLeakey FoundationNacey-Maggioncalda FoundationNational Science Foundation, Directorate for Social, Behavioral and Economic Sciences 1540259National Science Foundation, Directorate for Social, Behavioral and Economic Sciences F031543NIA NIH HHS R01 AG049395NIA NIH HHS R37 AG049395
6 · The paper itself

Abstract

Social relationships play an important role in animal behavior. Bonds with kin provide indirect fitness benefits, and those with nonkin may furnish direct benefits. Adult male chimpanzees (Pan troglodytes) exhibit social bonds with maternal brothers as well as unrelated adult males, facilitating cooperative behavior, but it is unclear when these bonds develop. Prior studies suggest that social bonds emerge during adolescence. Alternatively, bonds may develop during adulthood when male chimpanzees can gain fitness benefits through alliances used to compete for dominance status. To investigate these possibilities and to determine who formed bonds, we studied the social relationships of adolescent and young adult male chimpanzees (N = 18) at Ngogo in Kibale National Park, Uganda. Adolescent male chimpanzees displayed social bonds with other males, and they did so as often as did young adult males. Adolescent and young adult males frequently joined subgroups with old males. They spent time in proximity to and grooming with old males, although they also did so with their age peers. Controlling for age and age difference, males formed strong association and proximity relationships with their maternal brothers and grooming relationships with their fathers. Grooming bonds between chimpanzee fathers and their adolescent and young adult sons have not been documented before and are unexpected because female chimpanzees mate with multiple males. How fathers recognize their sons and vice versa remains unclear but may be due to familiarity created by relationships earlier in development.

Indexed as

FathersSiblingsSocial BehaviorAge FactorsAnimalsBehavior, AnimalGroomingMalePan troglodytesUgandadevelopmentkinshippaternal relationshipssocial relationships

Identifiers

PMID31903634
PMCPMC7015449

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.