Common carp reproduction in winter using heated water in temporal climate of Uzbekistan

¹ Samarkand State University, 1, University Boulevard, Samarkand, 130100, Uzbekistan
² Tashkent State Agrarian University, 2, University street, Tashkent, 100140, Uzbekistan

^* Corresponding author: tuxtamishevmansur@bk.ru

Abstract

In December 2022, 10 females and 2 males of common carp (Common carp) from ponds (water temperature 10°C) were placed in RAS pools and 2 females and 2 males (control group) were placed in an open pond in Uzbeki-stan. In January, the water temperature was increased by 1°C in two days in the RAS for two weeks. Since January 20, the water temperature was 22-24°C for two weeks. The fish had weigh 2950 – 3980 (average 3235) g. From February 3th, 4 females and 2 males were injected with the pituitary gland according to the routine methods and ripe eggs and milt were obtained, ripe eggs (920 g) were incubated in Zuger apparatus. Fertility was 90%, Feb-ruary 7th, the beginning of hatching of the larvae was determined. The yield of larvae from eggs was 64%. Injected at the same time, 2 females and 2 males from the control group of carp did not produce ripe eggs and milt at all.