Indices Variants Control (9%) Experiment (18%) Initial mass, grams 243.59 ±4.4 242.44 ±4.35 Final mass, grams 288.04 ±2.87*** 260.35 ±4.16*** Pure gain, grams 45 18 Average daily gain, grams 1.5 0.6 Average daily gain, % 5.44 4.94 Survival rate, % 100 100 Feed expense 1.1 1.5 Breedingtime, days. 30 30

Note: differences are clean under *** - Р ≤ 0.001

Table 5: Pisciculture-biological indices of hybrid sterlet x beluga breeding on the forage with various fish oil contents