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Leydig cells in Myleus ternetzi testes

Published online by Cambridge University Press:  15 January 1989

Maurice Loir ,
Anne Margeridon  and
Chantal Cauty
Maurice Loir
Affiliation:
INRA, Physiologie des Poissons, Campus de Beaulieu, 35042 Rennes Cedex, France
Anne Margeridon
Affiliation:
INRA, Physiologie des Poissons, Campus de Beaulieu, 35042 Rennes Cedex, France
Chantal Cauty
Affiliation:
INRA, Physiologie des Poissons, Campus de Beaulieu, 35042 Rennes Cedex, France
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Abstract

Males of Myleus ternetzi, at various maturation stages were netted in a French Guyana river. Testes were histologically and ultrastructurally analysed. Leydig cells were always present in large numbers. In mature or almost mature testes, they were characterized by a large spherical nucleus and an extensively developed smooth endoplasmic reticulum (SER) composed of very narrow tightly packed tubules. In regressed testes, most of the Leydig cells had a smaller nucleus with an irregular shape, a disorganized SER and the fine structure of the mitochondria was greatly affected. These changes would reflect different phases throughout a metabolic cycle in relation to spermatogenesis.

Keywords

FishSouth AmericatestisLeydig cellultrastructurePoissonAmérique du Sudtesticulecellule de Leydigultrastructure
Type
Research Article
Information
Aquatic Living Resources , Volume 2 , Issue 1 , January 1989 , pp. 57 - 61
Copyright
© IFREMER-Gauthier-Villars, 1989

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