Do male two-spotted gobies prefer large fecund females?

Christophe Pélabon*, Åsa A. Borg, Jens Bjelvenmark, Elisabet Forsgren, Iain Barber, Trond Amundsen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

45 Citations (SciVal)

Abstract

A male mating preference for large females may be expected when female size is correlated with fecundity. We tested for such a preference in a fish, the two-spotted goby (Gobiusculus flavescens, Gobiidae), for which a male preference for colorful females has been demonstrated. We offered males a choice between two stimulus females of different size, controlling for female color and stage of egg maturation. We also analyzed the relationship between size and fecundity (total number of eggs in the clutch) by allowing females of different size to spawn in a controlled environment. Female length explained 37% of the variation in fecundity, but males showed only a weak preference for large females. We compared the coefficient of variation (CV) in fecundity between female two-spotted gobies and other fish species for which male preferences for large females have been reported. The CV in fecundity in the two-spotted goby was among the lowest. We suggest that the low variation limits the potential fecundity benefit to be gained by a male selecting females on the basis of size alone. Our study emphasizes the importance of the variation in partner quality for the direction and the strength of mate preferences, as suggested by theoretical models.

Original languageEnglish
Pages (from-to)787-792
Number of pages6
JournalBehavioral Ecology
Volume14
Issue number6
DOIs
Publication statusPublished - Nov 2003

Keywords

  • Coefficient of variation
  • Fecundity
  • Mate choice
  • Size
  • Two-spotted goby

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