Sexual size dimorphism and reproductive investment by female spiders: A comparative analysis

John Prenter, Robert Elwood, Ian Montgomery

Research output: Contribution to journalArticlepeer-review

96 Citations (Scopus)

Abstract

We investigate the association between female reproductive investment, absolute size, and sexual size dimorphism in spiders to test the predictions of the fecundity-advantage hypothesis. The relationships between absolute size and sexual size dimorphism and aspects of female reproductive output are examined in comparative analyses using phylogenetically independent contrasts. We provide support for the idea that allometry for sexual dimorphism is the result of variation in female size more so than male size. Regression analyses suggest selection for increased fecundity in females. We argue that fecundity selection provides the only general explanation for the evolution of sexual size dimorphism in spiders.
Original languageEnglish
Pages (from-to)1987-1994
Number of pages8
JournalEvolution
Volume53
Issue number6
Publication statusPublished - Dec 1999

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Agricultural and Biological Sciences (miscellaneous)
  • Ecology, Evolution, Behavior and Systematics
  • Genetics
  • Ecology
  • Genetics(clinical)

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