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Changes in behavioural trait integration following rapid ecotype divergence in an aquatic isopod.

Harris, Sanna LU ; Eroukhmanoff, F; Green, K K; Svensson, Erik LU and Pettersson, Lars LU (2011) In Journal of Evolutionary Biology 24. p.1887-1896
Abstract
Colonization of new habitats can relax selection pressures, and traits or trait combinations no longer selected for might become reduced or lost. We investigated behavioural differentiation and behavioural trait integration in the freshwater isopod Asellus aquaticus. This isopod has recently colonized a novel habitat and diverged into two ecotypes which encounter different predator faunas. We investigated sex-specific behavioural differences and phenotypic integration in three behavioural assays: (i) time to emerge (TE) from a shelter, (ii) activity and (iii) escape behaviour. General activity and escape behaviour differed between ecotypes. Furthermore, general activity and TE differed between sexes. Behavioural traits were more frequently... (More)
Colonization of new habitats can relax selection pressures, and traits or trait combinations no longer selected for might become reduced or lost. We investigated behavioural differentiation and behavioural trait integration in the freshwater isopod Asellus aquaticus. This isopod has recently colonized a novel habitat and diverged into two ecotypes which encounter different predator faunas. We investigated sex-specific behavioural differences and phenotypic integration in three behavioural assays: (i) time to emerge (TE) from a shelter, (ii) activity and (iii) escape behaviour. General activity and escape behaviour differed between ecotypes. Furthermore, general activity and TE differed between sexes. Behavioural traits were more frequently correlated in the ancestral habitat, and phenotypic integration tended to be higher in this habitat as well. Our study suggests that different predator types, but also other ecological factors such as habitat matrices and population densities, might explain the differences in behavioural integration in these ecotypes. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
antipredator behaviour, Asellus aquaticus, behavioural correlation, behavioural syndrome, phenotypic integration, predation, rapid divergence
in
Journal of Evolutionary Biology
volume
24
pages
1887 - 1896
publisher
John Wiley & Sons
external identifiers
  • wos:000293910500005
  • pmid:21658187
  • scopus:80051669968
ISSN
1420-9101
DOI
10.1111/j.1420-9101.2011.02322.x
language
English
LU publication?
yes
id
ab5566f9-c708-41a9-962f-31f17269744a (old id 2008272)
date added to LUP
2011-08-19 13:29:58
date last changed
2017-10-22 03:16:39
@article{ab5566f9-c708-41a9-962f-31f17269744a,
  abstract     = {Colonization of new habitats can relax selection pressures, and traits or trait combinations no longer selected for might become reduced or lost. We investigated behavioural differentiation and behavioural trait integration in the freshwater isopod Asellus aquaticus. This isopod has recently colonized a novel habitat and diverged into two ecotypes which encounter different predator faunas. We investigated sex-specific behavioural differences and phenotypic integration in three behavioural assays: (i) time to emerge (TE) from a shelter, (ii) activity and (iii) escape behaviour. General activity and escape behaviour differed between ecotypes. Furthermore, general activity and TE differed between sexes. Behavioural traits were more frequently correlated in the ancestral habitat, and phenotypic integration tended to be higher in this habitat as well. Our study suggests that different predator types, but also other ecological factors such as habitat matrices and population densities, might explain the differences in behavioural integration in these ecotypes.},
  author       = {Harris, Sanna and Eroukhmanoff, F and Green, K K and Svensson, Erik and Pettersson, Lars},
  issn         = {1420-9101},
  keyword      = {antipredator behaviour,Asellus aquaticus,behavioural correlation,behavioural syndrome,phenotypic integration,predation,rapid divergence},
  language     = {eng},
  pages        = {1887--1896},
  publisher    = {John Wiley & Sons},
  series       = {Journal of Evolutionary Biology},
  title        = {Changes in behavioural trait integration following rapid ecotype divergence in an aquatic isopod.},
  url          = {http://dx.doi.org/10.1111/j.1420-9101.2011.02322.x},
  volume       = {24},
  year         = {2011},
}