Histological and ultrastructural studies on the effects of hCG on sex inversion in the protogynous teleost Coris julis |
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| Authors: | R. Reinboth, S. Bnrusle-Sicard,&dagger |
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| Affiliation: | Institut für Zoologie, Universität, 55099 Main, Germany;†Laboratoire de Biologie Marine, Université, 66680 Perpignan, France |
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| Abstract: | In the protogynous diandric teleost Coris julis , sex inversion can be induced by injection of human chorionic gonadotropin (hCG). The histological changes of the gonad are accompanied by a transformation of the female livery to that of secondary males. At the ultrastructural level, the presence of intragonadal primordial germ cells in spermatogonial nests and within the newly forming seminiferous lobules is shown. Leydig cells and granulocytes appear in the inverting gonads. The results support the assumption that gonadotropic hormone has a key role in protogynous sex change. |
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| Keywords: | sex change gonadotropic hormone germ cells Leydig cells |
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