Physiological evidence for two sturgeon gonadotrophins in Acipenser transmontanus
Identifieur interne : 001B29 ( Main/Merge ); précédent : 001B28; suivant : 001B30Physiological evidence for two sturgeon gonadotrophins in Acipenser transmontanus
Auteurs : Gary P. Moberg [États-Unis] ; Jack G. Watson [États-Unis] ; Serge Doroshov [États-Unis] ; Harold Papkoff [États-Unis] ; Raymond J. Pavlick Jr. [États-Unis]Source :
- Aquaculture [ 0044-8486 ] ; 1995.
Abstract
Physiological evidence in white sturgeon Acipenser transmontanus suggests that two gonadotrophins, termed sturgeon gonadotropin I (stGTH I) and sturgeon gonadotropin II (stGTH II), are involved in regulating reproduction. Pituitary and plasma concentrations of stGTH I were found to be higher than concentrations of stGTH II during vitellogenesis and the early stages of spermatogenesis. Conversely, pituitary and plasma concentrations of stGTH II were greater compared with stGTH I during ovulation and spermiation. The gonadotropin releasing hormone analog D-Ala6-des-Gly10-GnRH ethylamide (GnRHa) was effective in stimulating the release of both gonadotrophins in mature males and preovulatory females, with a maximal response occurring in the spring. Collectively, the data supports our view that sturgeon possess a dual gonadotropin system controlling reproduction.
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DOI: 10.1016/0044-8486(95)01004-1
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Pituitary and plasma concentrations of stGTH I were found to be higher than concentrations of stGTH II during vitellogenesis and the early stages of spermatogenesis. Conversely, pituitary and plasma concentrations of stGTH II were greater compared with stGTH I during ovulation and spermiation. The gonadotropin releasing hormone analog D-Ala6-des-Gly10-GnRH ethylamide (GnRHa) was effective in stimulating the release of both gonadotrophins in mature males and preovulatory females, with a maximal response occurring in the spring. Collectively, the data supports our view that sturgeon possess a dual gonadotropin system controlling reproduction.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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