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...
Published in: | Environmental Biology of Fishes |
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Main Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Kluwer Academic Publishers
1996
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Subjects: | |
Online Access: | http://www.springerlink.com https://doi.org/10.1007/BF00005215 http://ecite.utas.edu.au/48464 |
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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