Published in Scientific Papers. Series D. Animal Science, Vol. LXV, Issue 2
Written by Cristian RÎMNICEANU, Mirela CREȚU, Marian Tiberiu COADĂ, Angelica DOCAN, Lorena DEDIU
Growth performance and survival rates of backcrossed hybrids of bester females × beluga males were assessed after 28 days of rearing. Hybrid larvae were obtained in the conditions of the reproduction station from the Horia branch of Danube Research Consulting SRL. Three experimental groups were created, corresponding to three classes of sizes: V1- the initial weight of 3.2-5.2 g, V2-initial weight of 1.4-2.5 g, and V3- the initial weight of 0.7-1.4 g. To minimize the effects induced by the increase of the degree of heterogeneity among the fish, after 20 days the fish biomass was divided into two classes of sizes: VA: 25.8 - 32.8 g, respectively VB: 7.3 - 16.8 g. The obtained results showed better values of the individual weight gain in V1 compared to V2 and V3, while at the second stage of the experimental period, the values of the individual growth gain for each of the two experimental variants (VA, VB) were almost similar. Due to the high growth performance, as well as the good survival rate obtained in the two stages of the hybrid rearing, the crossing of these two species can be recommended for commercial fish producers for maximum yield and higher profit.
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