Gonadal Differentiation and the Mode of Sexuality in Cobitis taenia (Teleostei; Cobitidae)

Gonadal anatomy and development and patterns of development were studied to provide information about the mode of sexuality in Cobitis taenia (Teleostei: Cobitidae). Histological examination of gonads in developing fry showed that the two gonadal anlagen remain paired in males whereas in females the...

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Bibliographic Details
Published in:Copeia 1992-02, Vol.1992 (1), p.223-228
Main Author: Rasotto, Maria Berica
Format: Article
Language:English
Subjects:
Biological and medical sciences
Cobitis taenia
Female animals
Freshwater
Fundamental and applied biological sciences. Psychology
Gonads
Hermaphroditism
Histology
Male animals
Non mammalian vertebrate reproduction
Oocytes
Ovaries
Single status
Specimens
Teleostei
Testes
Vertebrates: reproduction
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Summary:Gonadal anatomy and development and patterns of development were studied to provide information about the mode of sexuality in Cobitis taenia (Teleostei: Cobitidae). Histological examination of gonads in developing fry showed that the two gonadal anlagen remain paired in males whereas in females they fused to form a single ovary. Few specimens of different ages and size were found with testes containing small numbers of small oocytes. Females grew faster than males; consequently, females were larger than males of the same age. Histological analysis and growth rates indicate that this is a gonochoristic species with a few males containing a few oocytes in their testes.
ISSN:0045-8511
1938-5110
DOI:10.2307/1446555