Heterospecific harassment of native endangered goodeids by invasive guppies in Mexico.

A Valero, C Macias Garcia, Anne Elizabeth Magurran

Research output: Contribution to journalArticlepeer-review

55 Citations (Scopus)

Abstract

Persistent courtship by male Trinidadian guppies (Poecilia reticulata) is costly for conspecific females. Since male guppies are known to attempt matings with other poeciliid females, we asked whether persistent courtship is also directed towards morphologically similar but phylogenetically distant females encountered following invasion. Skiffia bilineata is one of several endangered viviparous goodeids from Central Mexico, whose remaining habitats are increasingly shared with invasive guppies. Experiments in which guppy sex ratios were manipulated to vary the proportion of heterospecific to conspecific females showed that male guppies courted and attempted forced copulations with S. bilineata females even when females of their own species were in excess. This behaviour places an additional, and previously unrecognized, burden on a group of endemic Mexican fishes already in risk of extinction.

Original languageEnglish
Pages (from-to)149-152
Number of pages4
JournalBiology Letters
Volume4
DOIs
Publication statusPublished - 23 Apr 2008

Keywords

  • sexual harassment
  • intersexual conflict
  • invasive species
  • courtship interference
  • heterospecific interactions
  • endangered fishes
  • POECILIA-RETICULATA
  • SEXUAL-HARASSMENT
  • PREDATION RISK
  • FEMALES
  • MALES
  • COST
  • COMPETITION
  • COERCION

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