Environmental Biology of Fishes

, Volume 82, Issue 1, pp 23–33 | Cite as

Evidence of gonochorism in a grouper, Mycteroperca rosacea, from the Gulf of California, Mexico

  • Brad E. Erisman
  • Jorge A. Rosales-Casián
  • Philip A. Hastings
Full Paper


The sexual pattern and sexual development of the leopard grouper, Mycteroperca rosacea, were investigated from 483 specimens collected from the Gulf of California, Mexico. Histological and population data indicated a gonochoric sexual pattern. Some juveniles passed through an immature bisexual phase of gonadal development, but no evidence of post-maturational sex change was found. The immature bisexual phase is believed to be associated only with male development. The size distribution and size at sexual maturity were similar for both males and females. In accordance with predictions of the size-advantage model, the gonochoric sexual pattern of M. rosacea is likely influenced by its group-spawning mating system.


Mycteroperca rosacea; Groupers Sexual pattern Gonochorism 


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Copyright information

© Springer Science+Business Media, Inc. 2007

Authors and Affiliations

  • Brad E. Erisman
    • 1
  • Jorge A. Rosales-Casián
    • 2
  • Philip A. Hastings
    • 1
  1. 1.Marine Biology Research Division, Scripps Institution of OceanographyUniversity of California San DiegoLa JollaUSA
  2. 2.Departamento de EcologiaCentro de Investigación Científica y de Educación Superior de EnsenadaEnsenadaMéxico

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