GROWTH OF THE MOTHERBED BOLT IN PONDS OF THE MIDDLE CURRENT OF ZARAFSHAN, UZBEKISTAN

Abstract

In 2018-2020, the scales of the silver carp were studied to determine the growth during the formation of broodstock in the conditions of ponds in the middle reaches of the Zarafshan River. The scales of the silver carp are cycloid, the edges of the scales are even. The silver carp is a small-scaled fish with 100-108 scales in the lateral line. In immature fish, the annual ring is laid in the first half of spring, in sexually mature fish it coincides with the breeding period - at the end of May - June. Indicators of length and body weight in silver carp are strongly and positively related to each other (W = 0.0171 * Sl 3.017; r = 0.95). The silver carp in the nursery has a fast growth, on average SL 1 - 16.6 cm; Sl 2 - 30.4 cm; SL 3 - 48.2 cm; SL 4- 66.7 cm; SL 5 - 80.0 cm.