Effect of methyltestosterone on physiological state and rheoreaction of rainbow trout Parasalmo mykiss (=Oncorhynchus mykiss) under unfavorable keeping conditions
- Authors: 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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Affiliations:
- Institute of Ecology and Evolution
- Russia–Vietnam Tropical Research and Technology Center
- Issue: Vol 56, No 6 (2016)
- Pages: 904-915
- Section: Article
- URL: https://journal-vniispk.ru/0032-9452/article/view/166744
- DOI: https://doi.org/10.1134/S0032945216060072
- ID: 166744
Cite item
Abstract
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.
About the authors
E. D. Pavlov
Institute of Ecology and Evolution
Author for correspondence.
Email: p-a-v@nxt.ru
Russian Federation, Moscow, 119071
E. V. Ganzha
Institute of Ecology and Evolution
Email: p-a-v@nxt.ru
Russian Federation, Moscow, 119071
V. Yu. Ponomareva
Institute of Ecology and Evolution
Email: p-a-v@nxt.ru
Russian Federation, Moscow, 119071
V. V. Kostin
Institute of Ecology and Evolution
Email: p-a-v@nxt.ru
Russian Federation, Moscow, 119071
D. S. Pavlov
Institute of Ecology and Evolution
Email: p-a-v@nxt.ru
Russian Federation, Moscow, 119071
Vo Thi Ha
Russia–Vietnam Tropical Research and Technology Center
Email: p-a-v@nxt.ru
Viet Nam, Ho Shi Minh
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