Effects of the androgen preparation 'Testoenatum' on reproductive function in males of Atlantic salmon and several species of whitefish
| Autor: | Irene G. Murza, Oleg L. Christoforov |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Testosterone propionate
medicine.medical_specialty Gonad Coregonus peled medicine.drug_class Aquatic Science Biology Androgen biology.organism_classification chemistry.chemical_compound medicine.anatomical_structure Endocrinology chemistry Internal medicine Seasonal breeder medicine Sexual maturity Coregonus Testosterone |
| Zdroj: | Aquatic Living Resources. 9:31-41 |
| ISSN: | 0990-7440 |
| Popis: | Resume Atlantic salmon, Salrno salar, and several species of whitefish, Coregonus nasus, C. peled, C. luvaretus baeri, males were treated with a long-acting medical androgen preparation - "Testoenatum". This preparation contains 24 mg of testosterone enanthate and 111 mg of testosterone propionate in 1 ml peach oil solution. Multiple (2-5) or single intraperitoneal injections of a standard dose (0.1 mVkg fish body weight) were used. Treatment performed shortly before the beginning or within the breeding season resulted in a signiticant stimulation of spermiation, improvement of sperm parameters and extention of the gonad functional maturity period for 1-4 months. Low water temperatures (0.5-l.O°C) seem to be essential to obtain a long-lasting effect after one injection. The histology of the pituitary gland suggests that the gonadotropic cells were activated through a positive feedback mechanism. Testoenatum suppressed Sertoli cells' phagocytary activity. |
| Databáze: | OpenAIRE |
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