Published in Scientific Works. Series C. Veterinary Medicine, Vol. LXV, Issue 1
Written by Andrei MARMANDIU, Andreea TRONARU, Ion CUSTURĂ, Ion RĂDUCUŢĂ, Ileana PĂUNESCU
In the present study, the productive performance of the rainbow trout for consumption (one year and a summer trout – P1+, two-year trout –P2, two-year and one summer trout –P2+) was analyzed, grew up in a fishing unit in south-eastern part of country. At the control fishing made bi-monthly, by weighing 100 fish of each pond and age category, the body weight was assessed, and based on it, the total and daily average gain in growth was established. Also, by sampling, the main body measurements were made and the body indices were calculated for the two summer trout. The primary somatometric data were processed statistically. The one year and a summer trout (P1+) registered a good growth dynamic, resulting in a total average gain in growth of 150 g / fish starting from pond population to the autumn inventory and an average daily gain of 0.83 g / fish. In spring-autumn growth, body weight grew by about 4.33 times (from 45 g / fish in July to 195 g / fish on autumn stock). In the October-March growth period, the two-year rainbow trout (P2) recorded a total average gain of 138 g / fish and a daily average gain of 0.92 g / fish, and the two-year and one summer trout (P2+) achieved a total average gain of 102 g / fish and a daily average gain of 0.85 g / fish. The economicity of body mass accumulation was good (specific consumption of 1.18-1.20 kg of combined fodder). The main somatometric characteristics of two-year rainbow trout (P2), demonstrates the proper body development and correctness of the body conformation of this age group, and the low variability coefficients (below 10%) highlight the high homogeneity of trout in pond. The two-summer rainbow trout showed optimal body indices values: fattening index = 1.67%, profile index = 3.61, quality index = 1.63, thickness index = 20.07%, carnosity index = 18.81%.
[Read full article] [Citation]
