Silver carp has a huge range that distributed in Eurasia and America. Interest was aroused by the use in fish farming, high taste qualities in particular. In this research, the material was collected in October - December 2021 in the ponds of the fish hatchery of the Research Institute of Fisheries of Uzbekistan. During the experiments, the measured traits were calculated in the form of indices, showing them as a percentage of the standard body length for each individual. The results showed that the minimum and maximum body weight was 13 and 88, respectively. However, the average was 32.8 mm. It was observed that average hard rays in the dorsal fin was 2, but this was 4.5 in the case branched rays in the anal fin. Noteworthy, a comparison of the data shows that the index variability with the “truss-protocol” is significantly lower.

This article provides information on the growth of pike perch (Sander lucioperca) of Lake Tuzkon, which is part of the Aydar-Arnasay system of lakes. As a result of the research carried out, the age composition of the catches was determined: at the age of 1+ - 16.5%; 2+ - 38.5%; 3+ - 17.5%; 4+ - 12%; 5+ - 7.6% and 6+ - 8.0%. It was determined that pike perch in the first year of life grows to an average of 26.40 cm, in the second year - up to 44.45 cm, in the third - up to 53.35 cm, in the fourth - up to 67.37 cm, in the fifth and sixth years, respectively - up to 70.39 and 76.20 cm.