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Phenotypic plasticity in response to the social environment: effects of density and sex ratio on mating behaviour following ecotype divergence.

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  • المؤلفون: Karlsson K;Karlsson K; Eroukhmanoff F; Svensson EI
  • المصدر:
    PloS one [PLoS One] 2010 Sep 16; Vol. 5 (9). Date of Electronic Publication: 2010 Sep 16.
  • نوع النشر :
    Journal Article; Research Support, Non-U.S. Gov't
  • اللغة:
    English
  • معلومة اضافية
    • المصدر:
      Publisher: Public Library of Science Country of Publication: United States NLM ID: 101285081 Publication Model: Electronic Cited Medium: Internet ISSN: 1932-6203 (Electronic) Linking ISSN: 19326203 NLM ISO Abbreviation: PLoS One Subsets: MEDLINE
    • بيانات النشر:
      Original Publication: San Francisco, CA : Public Library of Science
    • الموضوع:
      Biological Evolution* ; Sex Ratio*; Isopoda/*physiology; Adaptation, Physiological ; Animals ; Ecosystem ; Female ; Isopoda/genetics ; Male ; Phenotype ; Population Dynamics ; Sexual Behavior, Animal
    • نبذة مختصرة :
      The ability to express phenotypically plastic responses to environmental cues might be adaptive in changing environments. We studied phenotypic plasticity in mating behaviour as a response to population density and adult sex ratio in a freshwater isopod (Asellus aquaticus). A. aquaticus has recently diverged into two distinct ecotypes, inhabiting different lake habitats (reed Phragmites australis and stonewort Chara tomentosa, respectively). In field surveys, we found that these habitats differ markedly in isopod population densities and adult sex ratios. These spatially and temporally demographic differences are likely to affect mating behaviour. We performed behavioural experiments using animals from both the ancestral ecotype ("reed" isopods) and from the novel ecotype ("stonewort" isopods) population. We found that neither ecotype adjusted their behaviour in response to population density. However, the reed ecotype had a higher intrinsic mating propensity across densities. In contrast to the effects of density, we found ecotype differences in plasticity in response to sex ratio. The stonewort ecotype show pronounced phenotypic plasticity in mating propensity to adult sex ratio, whereas the reed ecotype showed a more canalised behaviour with respect to this demographic factor. We suggest that the lower overall mating propensity and the phenotypic plasticity in response to sex ratio have evolved in the novel stonewort ecotype following invasion of the novel habitat. Plasticity in mating behaviour may in turn have effects on the direction and intensity of sexual selection in the stonewort habitat, which may fuel further ecotype divergence.
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    • الموضوع:
      Date Created: 20100924 Date Completed: 20110218 Latest Revision: 20241101
    • الموضوع:
      20250114
    • الرقم المعرف:
      PMC2940798
    • الرقم المعرف:
      10.1371/journal.pone.0012755
    • الرقم المعرف:
      20862332