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Temporally fluctuating prey and interfering predators: a positive feedback

Nilsson, Anders LU and Ruxton, G D (2004) In Animal Behaviour 68(1). p.159-165
Abstract
Prey densities often show fluctuating patterns over various timescales. Focusing on short-term, within-generation fluctuating patterns of local prey availability, we suggest that prey that show synchronized and high-amplitude fluctuations in availability experience decreased risks of predation, but also enhance the maintenance of predator interference hierarchies by affecting the relative foraging success of unequal conspecific interferers. When predators interfere with each other, they forage less intensely on prey, which benefits prey in terms of decreased predation risk. The system hence involves a positive feedback. We thus argue that short-term temporal fluctuations in local prey availability could be an important mechanism behind how... (More)
Prey densities often show fluctuating patterns over various timescales. Focusing on short-term, within-generation fluctuating patterns of local prey availability, we suggest that prey that show synchronized and high-amplitude fluctuations in availability experience decreased risks of predation, but also enhance the maintenance of predator interference hierarchies by affecting the relative foraging success of unequal conspecific interferers. When predators interfere with each other, they forage less intensely on prey, which benefits prey in terms of decreased predation risk. The system hence involves a positive feedback. We thus argue that short-term temporal fluctuations in local prey availability could be an important mechanism behind how interference-structured social predator systems are developed and sustained. The temporal fluctuations also have implications for the phenotypic diversity of predators, and may be involved in speciation processes. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Animal Behaviour
volume
68
issue
1
pages
159 - 165
publisher
Elsevier
external identifiers
  • wos:000222993000019
  • scopus:3042698765
ISSN
1095-8282
DOI
10.1016/j.anbehav.2003.10.015
language
English
LU publication?
yes
id
c4a949d4-d45f-4248-97df-011e66cb1d25 (old id 153184)
date added to LUP
2007-06-28 15:40:43
date last changed
2017-03-26 03:36:30
@article{c4a949d4-d45f-4248-97df-011e66cb1d25,
  abstract     = {Prey densities often show fluctuating patterns over various timescales. Focusing on short-term, within-generation fluctuating patterns of local prey availability, we suggest that prey that show synchronized and high-amplitude fluctuations in availability experience decreased risks of predation, but also enhance the maintenance of predator interference hierarchies by affecting the relative foraging success of unequal conspecific interferers. When predators interfere with each other, they forage less intensely on prey, which benefits prey in terms of decreased predation risk. The system hence involves a positive feedback. We thus argue that short-term temporal fluctuations in local prey availability could be an important mechanism behind how interference-structured social predator systems are developed and sustained. The temporal fluctuations also have implications for the phenotypic diversity of predators, and may be involved in speciation processes.},
  author       = {Nilsson, Anders and Ruxton, G D},
  issn         = {1095-8282},
  language     = {eng},
  number       = {1},
  pages        = {159--165},
  publisher    = {Elsevier},
  series       = {Animal Behaviour},
  title        = {Temporally fluctuating prey and interfering predators: a positive feedback},
  url          = {http://dx.doi.org/10.1016/j.anbehav.2003.10.015},
  volume       = {68},
  year         = {2004},
}