Abstract
A triennial performance test of five groups of tench, Tinca tinca (L.): Vodnany induced triploid V3n, Vodnany meiotic gynogenic Vgyn, diploid Vodnany V2n, Hungarian H2n and German G2n) in pond monoculture was carried out with diploid golden tench as control (C) to compute corrected weight of the groups tested. Survival rate ranged from 11.6% (V2n) to 30.6% (Vgyn) in yearlings, from 71.2% (V2n) to 91.5% (H2n) in 2 year-olds, from 60.0% (Vgyn) to 75.7% (V2n) in 3 year-olds while that of the control group was 8.5, 38.3 and 40.2% in the respective seasons. After three growing seasons the corrected weight of the fish in the groups H2n (254.6bg), V3n (257.0cg) and G2n (371.4cg) was higher (P < 0.05, Tukey HSD test) than that from the C (183.3ag) and V2n(205.6abg) groups. Among the chromosomally manipulated groups, ANCOVA test found the least slaughtering value for Vgyn (84.3%); among the purebreds the highest value was found for H2n (87.32%), significantly differing from V2n and G2n strains. A high gonadosomatic index in females (2.94 vs. 0.44% in males) resulted in inferior slaughtering values.
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This research was supported by the USB RIFCH project No. MSM6007665809 and GA523/08/0824.
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Gela, D., Kocour, M., Flajšhans, M. et al. Comparison of performance of genome manipulated and standard tench, Tinca tinca (L.), groups under pond management conditions. Rev Fish Biol Fisheries 20, 301–306 (2010). https://doi.org/10.1007/s11160-009-9142-1
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DOI: https://doi.org/10.1007/s11160-009-9142-1