Growth effects in Arctic charr reared in cold water: Feed frequency, access to bottom feeding and stocking density |
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| Authors: | Eva Brännäs Johan Linnér |
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| Institution: | (1) Department of Aquaculture, Swedish University of Agricultural Sciences, S-901 83 Umeå, Sweden;(2) Rural Economy and Agricultural Society of Norrbotten, Köpmangatan 2, S-972 38 Luleå, Sweden |
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| Abstract: | The effects of time restricted feeding, possibility of bottomfeeding and stocking density on the growth of Arctic charr(Salvelinus alpinus L.) were examined in fish held at lowtemperature (<2 °C). Fish fed for a restricted time (1 h) hadsignificantly (p < 0.05) lower specific growth rate (0.15 vs0.32% per day) than those fed the same ration over an extendedtime period (12 h). Increasing stocking densities had a positive andsignificant effect (p < 0.05) on growth with SGR increasing from 0.27to 0.52% per day at 2–30 kg m-3. Fish withaccess to feed on the tank floor had a significantly higher (p <0.05) growth rate (0.3 vs 0.13% per day) than those without thepossibility to feed from the bottom. When fish were held underconditions without access to the bottom a doubling of the feed rationdid not result in a significant (p > 0.05) increase in growth rate(0.13 vs 0.12%percnt; per day). |
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| Keywords: | Arctic charr (Salvelinus alpinus) growth low temperature stocking density time restricted feeding /kwd> |
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