The effect of water temperature on growth parameters of intensively reared juvenile peled Coregonus peled |
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| Authors: | Jan Matousek Vlastimil Stejskal Marketa Prokesova Jan Kouril |
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| Affiliation: | University of South Bohemia in Ceske Budejovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Center of Aquaculture and Biodiversity of Hydrocenoses and Institute of Aquaculture, Ceske Budejovice, Czech Republic |
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| Abstract: | The effect of water temperature on growth and food intake of juvenile peled Coregonus peled was tested with specimens of initial age 75 days and 230 days posthatching (dph). The 75‐day group (initial body weight 0.6 ± 0.04 g) were reared for 63 days and 230‐day group (initial body weight 13.75 ± 2.93 g) for 42 days at temperatures of 13, 16, 19, 22 and 25°C under 12:12 L:D photoperiod. The optimal temperature range for the 75 dph fish was found to be 19–22°C. The fish reached final mean weight of 9.7 ± 2.5 g at 19°C and 9.0 ± 2.7 g at 22°C. Final mean weight of 230 dph fish did not differ significantly among temperature groups. Mortality increased at higher temperatures, with the critical temperature of 25°C for both age groups. Maximum food intake (19.0 ± 4.7, 18.8 ± 5.2, 18.6 ± 4.6 g kg?1biomass) was observed in groups reared at temperatures of 19, 22 and 25°C with no significant differences among groups. |
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| Keywords: | recirculating aquaculture systems coregonidae survival growth food intake abiotic factors |
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