Two trials of the performance (growth, survival, dress out) of a number of different tench breeds/groups were conducted to elucidate the implications for the establishment of a coordinated breeding program. The first trial with a top-crossing scheme had to be concluded after 1st wintering. Age 1 + hybrids of Romanian-R breed with Tabor-T, Vodnany-V and Hungarian-H breeds displayed significantly better performance in weight and/or survival when compared to pure Romanian population (e.g., weight in R × T = 27.7 ± 11.1 g vs. R × R = 21.9 ± 8.6 g; or survival in R × V = 92.3% vs. R × R = 47.7%). The second trial with Czech breeds (Vodnany-V; Hluboka-HL; Velke Mezirici-VM and Tabor-T) revealed a very good growth in Hluboka breed. Weight of HL breed compared to Vodnany breed, representing the lowest growth, was 95.7, 103.3, and 40.5% higher after the 2nd growing season, the 2nd wintering and the 3rd growing season, respectively. Performance in survival and dress out at market size differed significantly between breeds as well, even if not corresponding always with growth performance. In conclusion the establishment of a coordinated breeding program, taking into account the origin of tench, might be useful tool for the improvement of tench production.
Reviews in Fish Biology and Fisheries – Springer Journals
Published: Nov 15, 2009
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