Sex-biased movement in the guppy (Poecilia reticulata)

  • Croft D
  • Albanese B
  • Arrowsmith B
 et al. 
  • 137

    Readers

    Mendeley users who have this article in their library.
  • 100

    Citations

    Citations of this article.

Abstract

The movement strategies of birds and mammals are often closely linked to their mating system, but few studies have examined the relationship between mating systems and movement in fishes. We examined the movement patterns of the guppy ( Poecilia reticulata) in the Arima river of Trinidad and predicted that sexual asymmetry in reproductive investment would result in male-biased movement. Since male guppies maximize their reproductive success by mating with as many different females as possible, there should be strong selection for males to move in search of mates. In agreement with our prediction, the percentage of fish that emigrated from release pools was higher for males than females (27.3% vs. 6.9%, respectively). Sex ratio was highly variable among pools and may influence a male's decision to emigrate or continue moving. We also detected a positive relationship between body length and the probability of emigration for males and a significant bias for upstream movement by males. Among the few females that did emigrate, a positive correlation was observed between body length and distance moved. Sex-biased movement appears to be related to mating systems in fishes, but the evidence is very limited. Given the implications for ecology, evolution, and conservation, future studies should explicitly address the influence of sex and mating systems on movement patterns.

Author-supplied keywords

  • Dispersal
  • Emigration
  • Mating systems
  • Population structure
  • Total length

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Authors

  • Darren P. Croft

  • Brett Albanese

  • Bethany J. Arrowsmith

  • Marc Botham

  • Michael Webster

  • Jens Krause

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free