Research

The temporal selfish herd: predation risk while aggregations form


Reference:

Morrell, L. J., Ruxton, G. D. and James, R., 2011. The temporal selfish herd: predation risk while aggregations form. Proceedings of the Royal Society B: Biological Sciences, 278 (1705), pp. 605-612.

Related documents:

This repository does not currently have the full-text of this item.
You may be able to access a copy if URLs are provided below. (Contact Author)

Official URL:

http://dx.doi.org/10.1098/rspb.2010.1605

Abstract

The hypothesis of the selfish herd has been highly influential to our understanding of animal aggregation. Various movement strategies have been proposed by which individuals might aggregate to form a selfish herd as a defence against predation, but although the spatial benefits of these strategies have been extensively studied, little attention has been paid to the importance of predator attacks that occur while the aggregation is forming. We investigate the success of mutant aggregation strategies invading populations of individuals using alternative strategies and find that the invasion dynamics depend critically on the time scale of movement. If predation occurs early in the movement sequence, simpler strategies are likely to prevail. If predators attack later, more complex strategies invade. If there is variation in the timing of predator attacks (through variation within or between individual predators), we hypothesize that groups will consist of a mixture of strategies, dependent upon the distribution of predator attack times. Thus, behavioural diversity can evolve and be maintained in populations of animals experiencing a diverse range of predators differing solely in their attack behaviour. This has implications for our understanding of predator-prey dynamics, as the timing of predator attacks will exert selection pressure on prey behavioural responses, to which predators must respond.

Details

Item Type Articles
CreatorsMorrell, L. J., Ruxton, G. D. and James, R.
DOI10.1098/rspb.2010.1605
Uncontrolled Keywordsanti-predator behaviour, aggregation, selfish herd, group living
DepartmentsFaculty of Humanities & Social Sciences > Psychology
Faculty of Science > Physics
Research CentresCentre for Mathematical Biology
RefereedYes
StatusPublished
ID Code23099

Export

Actions (login required)

View Item