Effect of Chorionic Gonadotrophin on Testicular Histology and Testosterone Production inTilapia leucosticta(Teleostei: Cichlidae)
- 1 October 1970
- journal article
- other
- Published by The Endocrine Society in Endocrinology
- Vol. 87 (4) , 819-822
- https://doi.org/10.1210/endo-87-4-819
Abstract
Eight adult male T. leucosticta were given daily injections of 500 IU human chorionic gonadotrophin (Pregnyl, Organon) intraperitoneally for 1 week. These fish showed marked increases in testicular size, gonosomatic index, interstitial cell and nuclear sizes, and spermatogenesis when compared to a similar control group injected with deionized water. The testosterone content of the testes and blood of CG-treated fish rises sharply, and parallelsthe histological parameters. These data indicate that in Tilapia, as in higher vertebrates, iterstitialtissue is stimulated by gonadotrophin to produce testosterone. Interstitial cell activityis a good index of androgen production. (Endocrinology87: 819, 1970)Keywords
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