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Habitat partitioning during character displacement between the sexes

De Lisle, Stephen P. LU ; Paiva, Samuel and Rowe, Locke (2018) In Biology letters 14(6).
Abstract

Ecological differences between the sexes are often interpreted as evidence of within-species ecological character displacement (ECD), a hypothesis with almost no direct tests. Here, we experimentally test two predictions that are direct corollaries of ECD between the sexes, in a salamander. First, we find support for the prediction that each sex has a growth rate advantage in the aquatic microhabitat where it is most commonly found. Second, we test the prediction that selection for ECD in the breeding environment may affect partial migration out of this environment. We found that phenotype-dependent migration resulted in a shift in the phenotypic distribution across treatments, with the highest sexual dimorphism occurring among... (More)

Ecological differences between the sexes are often interpreted as evidence of within-species ecological character displacement (ECD), a hypothesis with almost no direct tests. Here, we experimentally test two predictions that are direct corollaries of ECD between the sexes, in a salamander. First, we find support for the prediction that each sex has a growth rate advantage in the aquatic microhabitat where it is most commonly found. Second, we test the prediction that selection for ECD in the breeding environment may affect partial migration out of this environment. We found that phenotype-dependent migration resulted in a shift in the phenotypic distribution across treatments, with the highest sexual dimorphism occurring among residents at high founding density, suggesting that migration and ECD can both be driven by competition. Our work illustrates how complex patterns of habitat partitioning evolve during ECD between the sexes and suggest ECD and partial migration can interact to effect both ecological dynamics and evolution of sexual dimorphism.

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author
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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Partial migration, Phenotypic plasticity, Resource competition, Sexual dimorphism
in
Biology letters
volume
14
issue
6
article number
20180124
publisher
Royal Society Publishing
external identifiers
  • pmid:29925563
  • scopus:85049655230
ISSN
1744-9561
DOI
10.1098/rsbl.2018.0124
language
English
LU publication?
yes
id
5d0cffbb-ee40-4987-b991-c404a276dae5
date added to LUP
2018-07-26 11:20:34
date last changed
2021-09-22 03:56:22
@article{5d0cffbb-ee40-4987-b991-c404a276dae5,
  abstract     = {<p>Ecological differences between the sexes are often interpreted as evidence of within-species ecological character displacement (ECD), a hypothesis with almost no direct tests. Here, we experimentally test two predictions that are direct corollaries of ECD between the sexes, in a salamander. First, we find support for the prediction that each sex has a growth rate advantage in the aquatic microhabitat where it is most commonly found. Second, we test the prediction that selection for ECD in the breeding environment may affect partial migration out of this environment. We found that phenotype-dependent migration resulted in a shift in the phenotypic distribution across treatments, with the highest sexual dimorphism occurring among residents at high founding density, suggesting that migration and ECD can both be driven by competition. Our work illustrates how complex patterns of habitat partitioning evolve during ECD between the sexes and suggest ECD and partial migration can interact to effect both ecological dynamics and evolution of sexual dimorphism.</p>},
  author       = {De Lisle, Stephen P. and Paiva, Samuel and Rowe, Locke},
  issn         = {1744-9561},
  language     = {eng},
  month        = {01},
  number       = {6},
  publisher    = {Royal Society Publishing},
  series       = {Biology letters},
  title        = {Habitat partitioning during character displacement between the sexes},
  url          = {http://dx.doi.org/10.1098/rsbl.2018.0124},
  doi          = {10.1098/rsbl.2018.0124},
  volume       = {14},
  year         = {2018},
}