The effect of low intensity optical radiation on embryos and larvae of rainbow trout

Traditionally, the most difficult step of the reproduction technology and cultivation of fish is the step of stocking material cultivation. The incubation period requires correction of the embryonic development with the use of different factors. One such factor is a low-intensity optical radiation. The aim of our study was to determine the most optimal modes of the low-intensity optical radiation and the effect of the optimal mode on fish breeding and biological indicators of larvae and juvenile rainbow trout. The results of the study revealed that, within five days for 20 minutes a day with the power density of 3,0 mW/cm2, the low-intensity optical radiation (red region, X = 630 nm) can exert a stimulating effect on the size and weight of the rainbow trout stocking material. Juvenile fish from the experimental group was characterized by higher values of vitality and survival rate, higher adaptability to changing physiological parameters. Haematological and biochemical parameters of blood were within the physiological norm.