Optimization of Feeding Rate of Juvenile Common Carp, (Cyprinus Carpio L.), During Short Intensive Rearing Under Controlled Conditions

The aim of this experiment was to determine the optimum feeding dose for juvenile common carp (Cyprinus carpio L.) with the average initial body weight of 0.88g (WB) and the total length of 37.9 mm (TL). The rearing was conducted for 10 days at the temperature of 27°C under controlled conditions. The fish were divided into 6 feeding groups (in triplicate), for which the doses of feed were established at 6, 9, 12, 15, 18and 21% of the biomass per day.The biomass for each group was established every day before the first feeding.Fish were fed three times daily in equal portions, with granulate (1.5 mm granulation, Skretting, Norway: protein content 52%, fat – 20%, carbohydrates – 1.4%). After the experiment was completed, the following were determined for each feeding variant: average length (TL), average body weight (BW), Fulton’s condition coefficient (K), specific growth rate (SGR), feed conversion rate (FCR), individual
body mass gain (IBMG) and growth rate (GR). The dose of 12% of daily biomass should be regarded as the most suitable for juvenile common carp with the body weight ranging from 0.9 to 2.1 g, reared at the temperature of 27oC, under controlled conditions. Higher doses of feed did not increase the values of the rearing parameters. Present research showed that it is necessary to estimate the optimal feeding rates for common carp originated juveniles reared under controlled conditions.