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- Title
Effect of orally-administered 17α-methyltestosterone on spermatogenesis in immature milkfish, Chanos chanos Forsskal.
- Authors
Lee, C. S.; Weber, G. M.; Tamaru, C. S.
- Abstract
Diets containing 17α-methyltestosterone (17α-MT) were fed to milkfish, Chanos chanos, both during the spawning season (experiment 1) and after (experiment 2). The daily dosage of 17α-MT per kg of body weight was either 25 mg or 12.5 mg in experiment 1, and either 12.5 mg or 6.25 mg in experiment 2. The fish in both experiments were smaller than the minimum mature size previously reported. After 12 weeks of treatment, the treated fish had GSIs that were four times higher than the control fish in both experiments. Histologically, the testes of the control fish had only spermatogonia, in contrast to spermatozoa in the treated fish. However, no male possessed running milt. So 17α-MT induced spermatogenesis but not spermiation in the immature-sized milkfish.
- Publication
Journal of Fish Biology, 1986, Vol 29, Issue 5, p567
- ISSN
0022-1112
- Publication type
Article
- DOI
10.1111/j.1095-8649.1986.tb04973.x