Seasonal Variations in Deposition of Fat in the Body of Rainbow Trout Oncorhynchus Mykiss (Walbaum 1792) and Its Effect on Yield and Quality of Meat in Cages at Commercial Breeding Farm

The aim of the experiment was to determine the effects of seasonal changes in the degree of fat deposition in various parts of the body and its impact on yield VSI (Viscero Somatic Index) of rainbow trout Oncorhynchus mykiss (Walbaum 1792), under the same conditions of feeding in cage farming systems of commercial fish farms. The task was to identify what is and what impact seasonal variation and environment on yield and quality of the meat of rainbow trout, which is fed with same nutrients to achieve a certain weight. As a basic experimental material has been used rainbow trout produced for the Bosnian and foreign markets of varying body weight: First group of fish between 150 ± 5 g, group II 200 ± 5 g and III group 250 ± 5 g. The same is provided from the local fish farm Salakovac on the Neretva River. A total of 180 fish samples were analyzed.