Effect of methyltestosterone on physiological state and rheoreaction of rainbow trout Parasalmo mykiss (=Oncorhynchus mykiss) under unfavorable keeping conditions
- Авторлар: Pavlov E.D.1, Ganzha E.V.1, Ponomareva V.Y.1, Kostin V.V.1, Pavlov D.S.1, Ha V.T.2
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Мекемелер:
- Institute of Ecology and Evolution
- Russia–Vietnam Tropical Research and Technology Center
- Шығарылым: Том 56, № 6 (2016)
- Беттер: 904-915
- Бөлім: Article
- URL: https://journals.rcsi.science/0032-9452/article/view/166744
- DOI: https://doi.org/10.1134/S0032945216060072
- ID: 166744
Дәйексөз келтіру
Аннотация
The effect of methyltestosterone given with feed during one and two months on the state of gonads, the level of thyroid, and sex steroid hormones in blood and on rheoreaction is studied in juvenile rainbow trout Parasalmo mykiss (=Oncorhynchus mykiss) raised under unfavorable conditions (tropics, Vietnam). In comparison with the control, in the experimental group, the part of sterile specimens was higher (83 vs. 35%), the part of males was lower (17 vs. 40%), while females and hermaphrodites were absent. At prolonged starvation (12 days), the experimental specimens demonstrated lower increase of the level of thyroid and sex steroid hormones in blood than that in the control specimens. Methyltestosterone modified the behavior of rainbow trout in water flow: delivery of the hormone in food during 1 month increased the part of fish moving against the flow and suppressed movement both upstream and downstream during 2 months. Thus, methyltestosterone negatively influences the physiological condition and adaptation capacity of rainbow trout.
Авторлар туралы
E. Pavlov
Institute of Ecology and Evolution
Хат алмасуға жауапты Автор.
Email: p-a-v@nxt.ru
Ресей, Moscow, 119071
E. Ganzha
Institute of Ecology and Evolution
Email: p-a-v@nxt.ru
Ресей, Moscow, 119071
V. Ponomareva
Institute of Ecology and Evolution
Email: p-a-v@nxt.ru
Ресей, Moscow, 119071
V. Kostin
Institute of Ecology and Evolution
Email: p-a-v@nxt.ru
Ресей, Moscow, 119071
D. Pavlov
Institute of Ecology and Evolution
Email: p-a-v@nxt.ru
Ресей, Moscow, 119071
Vo Ha
Russia–Vietnam Tropical Research and Technology Center
Email: p-a-v@nxt.ru
Вьетнам, Ho Shi Minh
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