sGnRH-A [(d-Arg6, Pro9, NEt-)LHRH] in combination with domperidone induces gonad reversal in a protogynous fish, the bluehead wrasse, Thalassoma bifasciatum

Autor:	C. R. Kramer, L. Bubenheimer-Livolsi, M. T. Caddell
Rok vydání:	1993
Předmět:	medicine.medical_specialty Gonad biology Ovary Aquatic Science Sex reversal biology.organism_classification Domperidone Thalassoma Bluehead wrasse medicine.anatomical_structure Endocrinology Wrasse Hypothalamus Internal medicine medicine Ecology Evolution Behavior and Systematics medicine.drug
Zdroj:	Journal of Fish Biology. 42:185-195
ISSN:	1095-8649 0022-1112
DOI:	10.1111/j.1095-8649.1993.tb00320.x
Popis:	The effects of thrice weekly injections of Ovaprim (sGnRH-A in combination with domperidone) on the ovary of Thalassoma bifasciatum, a protogynous marine fish, after 4 and 6 weeks are described. At the end of 4 weeks of treatment, 72% (n=13) of the original females showed signs of reversal. The majority of these were deemed early stage although mid- (n=2) and late (n=1) stage reversals were present. At 6 weeks, 92% of the females had ovaries that were undergoing transformation. None of these, however, progressed beyond the early stage. Only 3.8% of the control fish showed signs of reversal over the same periods. The blue head colour pattern, typical of the terminal phase, did not appear in any of the fish. To our knowledge, this is the first report investigating the hypothalamic influence on sex reversal in T. bifasciatum. These observations shed new light on the neuroendocrine control of reversal of gender in this species and hermaphroditic fishes in general.
Databáze:	OpenAIRE
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