The Study of Embryos Survival Rate after Eggs Triploidy Treatment in Rainbow Trout (Oncorhynchus mykiss Walbaum )

Abstract

The aim of the paper was the study of embryos survival rate after eggs triploidy treatment in rainbow trout (Oncorhynchus mykiss Walbaum). The triploidy induction was preformed during the cold period of January when the water temperature reached 8-10°C and the environmental conditions inducted the natural reproduction of rainbow trout. The reproducers used for the experiments were between 3-5 years old. The spawn fertilization was made by the wet method. For each experimental lot higher losses have been observed at the end of the first, second, third and the middle of the fourth decade. The T1 experimental lot has registered the highest losses in the first decade while the T2 lot in the last decade. The losses registered for the T1 and T2 experimental lots during the spawn incubation were significant higher comparing to the control lot M as resulted by the statistical interpretation of data’s.

Keywords

• embryos survival
• rainbow trout
• triploids