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Environmental Biology of Fishes

, Volume 46, Issue 2, pp 139–149 | Cite as

Aspects of the reproductive biology of the concha wrasse, Nelabrichthys ornatus, at Tristan da Cunha

  • Timothy G. Andrew
  • Colin D. Buxton
  • Thomas Hecht
Full Paper

Synopsis

The reproductive biology of the concha wrasse, Nelabrichthys ornatus, at Tristan da Cunha in the South Atlantic Ocean is described. Histological evidence shows that the species is a monandric protogynous hermaphrodite. N. ornatus displays full permanent sexual dichromatism with all males occurring in the upper size classes of the population. Size specific habitat preference is described. Aspects of the mating system of the species resemble a lek although the possibility of mating site selection by females is not discounted. Spawning groups have a sex ratio of between 4 and 7 females per male.

Key words

Labrid Protogynous hermaphroditism Reproductive season Courtship Social structure 

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Copyright information

© Kluwer Academic Publishers 1996

Authors and Affiliations

  • Timothy G. Andrew
    • 1
  • Colin D. Buxton
    • 1
  • Thomas Hecht
    • 1
  1. 1.Department of Ichthyology and Fisheries ScienceRhodes UniversityGrahamstownSouth Africa

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