Facial reconstruction

Search LJMU Research Online

Browse Repository | Browse E-Theses

Reproductive competition triggers mass eviction in cooperative banded mongooses

Thompson, FJ and Marshall, HH and Sanderson, JL and Vitikainen, EIK and Nichols, HJ and Gilchrist, JS and Young, AJ and Hodge, SJ and Cant, MA (2016) Reproductive competition triggers mass eviction in cooperative banded mongooses. PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES. ISSN 0962-8452

[img] Text
Thompson et al Reproductive competition triggers mass eviction.pdf - Accepted Version
Available under License Creative Commons Attribution.

Download (431kB)
[img] Video (Banded mongoose eviction)
Banded mongoose eviction video.mp4 - Accepted Version
Available under License Creative Commons Attribution.

Download (14MB)
[img] Text (Supplementary material)
Thompson et al Electronic Supplementary Material[1].pdf - Accepted Version
Available under License Creative Commons Attribution.

Download (1MB)

Abstract

In many vertebrate societies, forced eviction of group members is an important determinant of population structure, but little is known about what triggers eviction. Three main explanations are (1) the reproductive competition hypothesis; (2) the coercion of cooperation hypothesis; and (3) the adaptive forced dispersal hypothesis. The last hypothesis proposes that dominant individuals use eviction as an adaptive strategy to propagate copies of their alleles through a highly structured population. We tested these hypotheses as explanations for eviction in cooperatively breeding banded mongooses (Mungos mungo), using a 16-year dataset on life history, behaviour and relatedness. In this species, groups of females, or mixed-sex groups, are periodically evicted en masse. Our evidence suggests that reproductive competition is the main ultimate trigger for eviction for both sexes. We find little evidence that mass eviction is used to coerce helping, or as a mechanism to force dispersal of relatives into the population. Eviction of females changes the landscape of reproductive competition for remaining males, which may explain why males are evicted alongside females. Our results show that the consequences of resolving within-group conflict resonate through groups and populations to affect population structure, with important implications for social evolution.

Item Type: Article
Uncontrolled Keywords: 06 Biological Sciences, 11 Medical And Health Sciences, 07 Agricultural And Veterinary Sciences
Subjects: Q Science > QH Natural history
Q Science > QL Zoology
Divisions: Natural Sciences and Psychology
Publisher: Royal Society
Date Deposited: 22 Feb 2016 15:05
Last Modified: 31 Mar 2016 11:08
URI: http://researchonline.ljmu.ac.uk/id/eprint/2940

Actions (login required)

View Item View Item