Male reproductive system in the South American catfish Conorhynchus conirostris

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Abstract:

The testes of the catfish Conorhynchus conirostris(n = 67) from the São Francisco River, Minas Gerais, Brazil were of the fringed type, similar to those of some Pimelodidae. The germ, Sertoli and Leydig cells showed characteristics which are general for all vertebrates although the spermatozoa had a peculiar morphology, with an ovoid head without an acrosome, inverted U‐shaped nucleus, a short midpiece and a long tail, typical of teleosts showing external fertilization. The spermatic duct and genital papilla performed a secretory function.

Document Type: Research Article

DOI: http://dx.doi.org/10.1111/j.0022-1112.2004.00377.x

Publication date: May 1, 2004

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