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Morphology of the ovotestis of Serranus atricauda (Teleostei, Serranidae)

Morphology of the ovotestis of Serranus atricauda (Teleostei, Serranidae) Analysis of gonad organization and development revealed that Serranus atricauda is a functional simultaneous hermaphrodite. The ovary is classified as asynchronous. Oocyte growth is divided into five stages: stage I (primary growth stage), stage II (yolk vesicle formation), stage III (vitellogenesis), stage IV (oocyte maturation) and stage V (mature egg). The testis is of the unrestricted or lobular spermatogonial type. Spermatogenic cells include spermatogonia, primary and secondary spermatocytes, spermatids (which form cysts in the seminiferous tubules) and spermatozoa (free in the lumen). The histological structure of the gonad and sperm morphology would seem to indicate that this species is an externally fertilizing teleost. The observation of several spermatozoa on a hydrated oocyte within the ovarian lumen suggests, for the first time in this genus, that 'internal gametic association' may occur. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Aquatic Sciences Springer Journals

Morphology of the ovotestis of Serranus atricauda (Teleostei, Serranidae)

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References (55)

Publisher
Springer Journals
Copyright
Copyright © 2002 by Birkhäuser Verlag,
Subject
Life Sciences; Freshwater & Marine Ecology; Marine & Freshwater Sciences; Oceanography; Ecology; Life Sciences, general
ISSN
1015-1621
eISSN
1420-9055
DOI
10.1007/s00027-002-8057-x
Publisher site
See Article on Publisher Site

Abstract

Analysis of gonad organization and development revealed that Serranus atricauda is a functional simultaneous hermaphrodite. The ovary is classified as asynchronous. Oocyte growth is divided into five stages: stage I (primary growth stage), stage II (yolk vesicle formation), stage III (vitellogenesis), stage IV (oocyte maturation) and stage V (mature egg). The testis is of the unrestricted or lobular spermatogonial type. Spermatogenic cells include spermatogonia, primary and secondary spermatocytes, spermatids (which form cysts in the seminiferous tubules) and spermatozoa (free in the lumen). The histological structure of the gonad and sperm morphology would seem to indicate that this species is an externally fertilizing teleost. The observation of several spermatozoa on a hydrated oocyte within the ovarian lumen suggests, for the first time in this genus, that 'internal gametic association' may occur.

Journal

Aquatic SciencesSpringer Journals

Published: Apr 1, 2002

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