Evidence map›Paper›PMID 34938490›Full record

ArticleEcology and evolution2021

Kinship, dear enemies, and costly combat: The effects of relatedness on territorial overlap and aggression in a cooperative breeder.

David J Humphries, Martha J Nelson-Flower, Matthew B V Bell, Fiona M Finch, Amanda R Ridley

Abstract read
In one paragraph

Article in Ecology and evolution, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.

0numbers the graph read from it
0cells of the map it votes in
10citing 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

10 citing papers in PubMed.

  1. Review
  2. Non-breeding social behaviour as an investment in reducing future territoriality costs.Biological reviews of the Cambridge Philosophical Society · 2025
    Review
  3. Article
  4. Article
  5. Article
  6. Article
  7. Kidnapping intergroup young: an alternative strategy to maintain group size in the group-living pied babbler (Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022
    Article
  8. Variation between species, populations, groups and individuals in the fitness consequences of out-group conflict.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2022
    Review
  9. Article
  10. Aggression and spatial positioning of kin and non-kin fish in social groups.Behavioral ecology : official journal of the International Society for Behavioral Ecology
    Article
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

5 authors.

David J HumphriesDepartment of Biological Sciences Macquarie University Sydney New South Wales Australia.
Martha J Nelson-FlowerPied Babbler Research Project University of Cape Town Rondebosch Western Cape South Africa.ORCID https://orcid.org/0000-0001-6753-9252
Matthew B V BellPied Babbler Research Project University of Cape Town Rondebosch Western Cape South Africa.
Fiona M FinchPied Babbler Research Project University of Cape Town Rondebosch Western Cape South Africa.
Amanda R RidleyPied Babbler Research Project University of Cape Town Rondebosch Western Cape South Africa.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Many species maintain territories, but the degree of overlap between territories and the level of aggression displayed in territorial conflicts can vary widely, even within species. Greater territorial overlap may occur when neighboring territory holders are close relatives. Animals may also differentiate neighbors from strangers, with more familiar neighbors eliciting less-aggressive responses during territorial conflicts (the "dear enemy" effect). However, research is lacking in how both kinship and overlap affect territorial conflicts, especially in group-living species. Here, we investigate kinship, territorial overlap, and territorial conflict in a habituated wild population of group-living cooperatively breeding birds, the southern pied babbler

Indexed as

cooperationdear enemyinter‐group interactionkin‐biased overlapkin selectionterritorial overlap

Identifiers

PMID34938490
PMCPMC8668771

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.