Effect of Illumination on the Movement of Rainbow Trout Oncorhynchus (Parasalmo) mykiss (Salmonidae) Juveniles in Water Flow and the Level of Thyroid Hormones and Cortisol in Their Blood.

Autor: Kostin, V. V., Pavlov, E. D., Ganzha, E. V., Pavlov, D. S.
Zdroj: Journal of Ichthyology; Aug2024, Vol. 64 Issue 4, p663-668, 6p
Abstrakt: Long-term influence (53 days) of long-term constant illumination (100 and 1000 lux illuminance) on the behavior of rainbow trout (Oncorhynchus mykiss) juveniles and the level of thyroid hormones and cortisol in their blood has been experimentally recorded. At 100 lux illuminance, the fish moved equally upstream and downstream; i.e., their behavior was to stay in the current habitat. At 1000 lux illuminance, the fish more often moved upstream; i.e., their behavior was to leave the current habitat. The experimental illumination regimes did not affect the thyroid hormones and cortisol levels in the fish blood. [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index
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