Growth parameters of huchen Hucho hucho (L.) in the wild and under culture conditions [RESEARCH ARTICLE]
The aim of this study was to determine the age and growth parameters of huchen, Hucho hucho (L.), individuals collected in the Dunajec River and from a fish farm in Príbovce. A total of 26 fish ranging in age from 5+ to 24+ were analyzed. Length-weight correlations were calculated with transformed regression equations and the von Bertalanffy growth model. The following equations were calculated for the fish from the Dunajec River – log W = –5.665392 + 3.256319 ´ log L; log L = 1.739815 + 0.307095 ´ log W; L(t) = 1451.4 ´[1 – exp–0.1093 ´ (t – 0.1251)], and for the fish from the Príbovce farm – log W = – 7.176307 + 3.773629 ´ log L; log L = 1.901699 + 0.264997 ´ log W; L(t) = 1394.1 ´[1 – exp–0. 0997 ´ (t – 0.1249)]. The values of Fulton’s condition coefficient for the fish from the Dunajec River and the Príbovce farm were 1.24 and 1.35, respectively. Back-calculated length-weight growth in subsequent years was higher in the fish from the Dunajec River, but both huchen groups generally exhibited positive allometric growth.
MJ. Andreji [+], I. Stráňai
Slovak University of Agriculture
Faculty of Agrobiology and Food Resources
Department of Poultry Science and Small Animal Husbandry
Tr. A. Hlinku 2, SK – 949 76 Nitra, Slovak Republic
Tel: +421 37 641 4700, e-mail: Jaroslav.Andreji@uniag.sk