Evolution of Mating Systems and Sexual Size Dimorphism in North American cyprinids

M. Pyron, T. E. Pitcher, S. J. Jacquemin

Research output: Contribution to journalArticlepeer-review

Abstract

<p> <dl id="x-x-citationFields"> <dt> </dt> <dd> Mating systems evolve with sexual size dimorphism (SSD) in many animals. Mating systems with males larger than females occur when males compete for female access or guard territories, while mating systems with group mating tend to occur in species where females are the same size or larger than males. In addition to variation in SSD with mating system, sperm competition varies among mating systems in predictable patterns. We examined the evolution of mating systems with SSD and testes mass in 111 North American Cyprinidae fishes using phylogenetic comparative methods. Our results demonstrate that the evolution of mating systems in Cyprinidae fishes is from ancestral taxa that are group spawners with females the same size or larger than males to pair spawning systems where males tend to be larger than females. We used an additive model to predict male and female body size from testes mass and mating system. Only mating system varied predictably with SSD. Our results for analyses of hyperallometry (Rensch's rule) were that individual species of Cyprinidae can have hyperallometry for SSD, but the pattern is not present across all taxa. </dd> </dl></p>
Original languageEnglish
Pages (from-to)747-756
Number of pages10
JournalBehavioral Ecology and Sociobiology
Volume67
Issue number5
DOIs
StatePublished - May 2013
Externally publishedYes

ASJC Scopus Subject Areas

  • Ecology, Evolution, Behavior and Systematics
  • Animal Science and Zoology

Keywords

  • Comparative phylogenetic analyses
  • Rensch's rule
  • Sexual selection
  • Sexual size dimorphism

Disciplines

  • Biology
  • Medical Sciences
  • Systems Biology

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