Comparative characteristics of age-3–4 rainbow trout females reared in the conditions of the industrial fish farm «Sloboda-Banyliv»


  • P. D. Mendryhsora Institute of Fisheries of the National Academy of Sciences of Ukraine
  • G. A. Kurynenko Institute of Fisheries of the National Academy of Sciences of Ukraine
  • A. I. Mruk Institute of Fisheries of the National Academy of Sciences of Ukraine
Keywords: rainbow trout, body weight, body length, productive and reproductive features, selective-breeding works, trout culture.

Abstract

Rational management of the trout economy requires the creation of high-quality productive uterine herds, which should maximally meet the requirements of farms in healthy life-sustaining landing material. However, numerous factors (high level of inbreeding, uncontrolled interbreeding of various tribal groups of fish, etc.) lead to a gradual decrease in reproductive parameters, degradation of breeding qualities and a decrease in the resistance of fish to diseases or adverse external factors of the environment. Therefore, the combination of research on phenotypic and productive features with genetic control at present is an advanced and necessary direction in domestic trout managementSelective-breeding works on the formation of rainbow trout brood stocks have been performed. It was found that the brood fish reared in the conditions of the industrial fish farm «Sloboda-Banyliv» despite instable rearing conditions were characterized by moderate growth rate and had high values of productive and reproductive features. The mean weight of age-3 rainbow trout females 1282.5 g. This parameter in age-4 fish was higher by 39.8%. Working fecundity of age-3 females 3.48 thousand eggs, in age-4 fish it was higher by 1.09 thousand eggs. Mean weights of eggs were 239.7 and 340.8 g, respectively; individual parameter of eggs increased with age by 6.7% in weight and by 1.9% by diameter.

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Published
2017-10-30
How to Cite
Mendryhsora, P., Kurynenko, G., & Mruk, A. (2017). Comparative characteristics of age-3–4 rainbow trout females reared in the conditions of the industrial fish farm «Sloboda-Banyliv». Scientific Messenger of LNU of Veterinary Medicine and Biotechnologies. Series: Agricultural Sciences, 19(79), 117–121. https://doi.org/10.15421/nvlvet7923