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

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 i...

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Bibliographic Details
Published in:Environmental Biology of Fishes
Main Authors: Andrew, TG, Buxton, CD, Hecht, T
Format: Article in Journal/Newspaper
Language:English
Published: Kluwer Academic Publishers 1996
Subjects:
Agricultural and Veterinary Sciences
Fisheries Sciences
Fisheries Sciences not elsewhere classified
Tristan
South Atlantic Ocean
Online Access:http://www.springerlink.com
https://doi.org/10.1007/BF00005215
http://ecite.utas.edu.au/48464
Description
Summary: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.

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