Evidence map›Paper›PMID 27853570›Full record

ArticleRoyal Society open science2016

Mothers may shape the variations in social organization among gorillas.

Andrew M Robbins, Maryke Gray, Thomas Breuer, Marie Manguette, Emma J Stokes, Prosper Uwingeli, Innocent Mburanumwe, Edwin Kagoda, Martha M Robbins

Abstract read
In one paragraph

Article in Royal Society open science, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing 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

5 citing papers in PubMed.

  1. Post-reproductive lifespan in wild mountain gorillas.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
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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

9 authors.

Andrew M RobbinsMax Planck Institute for Evolutionary Anthropology , Deutscher Platz 6, 04103 Leipzig , Germany.ORCID 0000-0001-8913-3536
Maryke GrayFormerly with the International Gorilla Conservation Programme , PO Box 931, Kigali , Rwanda.
Thomas BreuerWildlife Conservation Society, Global Conservation Program, 2300 Southern Boulevard, Bronx, NY 10460, USA; Mbeli Bai Study, Wildlife Conservation Society-Congo Program, BP 14537 Brazzaville, Republic of Congo.
Marie ManguetteMax Planck Institute for Evolutionary Anthropology, Deutscher Platz 6, 04103 Leipzig, Germany; Mbeli Bai Study, Wildlife Conservation Society-Congo Program, BP 14537 Brazzaville, Republic of Congo.
Emma J StokesWildlife Conservation Society , Global Conservation Program , 2300 Southern Boulevard, Bronx, NY 10460 , USA.
Prosper UwingeliVolcanoes National Park , Rwanda Development Board , PO Box 6239, Gishushu, Kigali , Rwanda.
Innocent MburanumweParc National des Virunga-sud , Institut Congolais pour la Conservation de la Nature , c/o IGCP-DRC, B.P. 137 Gisenyi , Rwanda.
Edwin KagodaFormerly with the Mgahinga Gorilla National Park , Uganda Wildlife Authority , PO Box 3530, Kampala , Uganda.
Martha M RobbinsMax Planck Institute for Evolutionary Anthropology , Deutscher Platz 6, 04103 Leipzig , Germany.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

When mothers continue to support their offspring beyond infancy, they can influence the fitness of those offspring, the strength of social relationships within their groups, and the life-history traits of their species. Using up to 30 years of demographic data from 58 groups of gorillas in two study sites, this study extends such findings by showing that mothers may also contribute to differences in social organization between closely related species. Female mountain gorillas remained with their sons for significantly longer than western gorillas, which may explain why male philopatry and multimale groups are more common among mountain gorillas. The presence of the putative father and other familiar males did not vary significantly between species, and we found only limited support for the socio-ecological theory that the distribution of adult males is influenced by the distribution of females. Within each gorilla species, variations in those distributions may also reflect the different stages in the typical life cycle of a group. Collectively, our results highlight the potentially far-reaching consequences of maternal support that extends beyond infancy, and they illustrate the opportunity to incorporate additional factors into phylogenetic analyses of variations in social organization, including studies of human evolution.

Indexed as

dispersalhuman evolutionlife historymaternal investmentmultimale groupsphilopatry

Identifiers

PMID27853570
PMCPMC5098995

What OpenQuestion holds

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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.