Characteristic of exterior indicators of male of Amur wild carp (Cyprinus carpio haematopterus) of different genesis

Purpose. Analyze the results of rearing and provide a comprehensive assessment of the productive indicators of male Amur carp of various genesis. Methodology. The cultivation was carried out in the pond conditions of the Lviv Experimental Station of the Institute of Fisheries of the UAAS. The material for the research was 8- and 9-year-old Amur carp males obtained by the factory method from local females, whose eggs were fertilized with the sperm of local males (local) and defrost sperm of Far Eastern males from the Amur River (cryo). The stocking density of carp breeders in summer was 96-105 ind./ha in winter - 1.0 thousand ind./ha. The maintenance of the producers and the spawning were carried out according to generally accepted instructions. The material was statistically processed in Microsoft Office Excel (2016). The analysis of values is carried out in the system of absolute values. The criteria for analyzing the indicators were their mean value and mean deviation (M ± m), the indicator of variability (Cv). The fish were fed with the specialized food of the firm "Aller Aqua" and sprouted wheat. Findings. According to the selection and breeding work on the formation of the Amur carp broodstock, it was revealed that the producers raised from the obtained defrosted sperm were characterized by a moderate growth rate and exceeded in terms of the main exterior characteristics of males of the same age of local origin. The average body mass of cryomales aged 8-9 years was 2416.5±295.59 and 2698.0±284.05 g, respectively. In males of local origin of the same age: 2015.0±244.53 and 2277.5±373.09 g, respectively. For the rest of the exterior indicators, the advantage of males obtained using cryotechnology was also recorded. Originality. A comparative analysis of productive parameters of sexually mature males of Amur wild carp of different geneses was performed for the first time in Ukraine Practical value. The results of this work will make it possible to carry out a comparative analysis of the complex of productive indicators of sexually mature males of the Amur carp obtained from defrosted and native sperm and to substantiate the expediency of using them in breeding work in order to obtain industrial hybrids.