Effects of Feeding Frequencies on Growth and Body Composition of Juvenile Common Carp (Cyprinus carpio) and Their Compensation Growth

Abstract

Effects of feeding frequencies on growth and body composition of juvenile common carp (Cyprinus carpio) were tested. Two separate experiments were done for this purpose. The first experiment (Exp. 1) was conducted with 1 (1-1), 2(1-2), 3 (1-3), 4 (1-4), 5 (1-5), and 6 times (1-6) of daily feeding frequencies for 40 feeding days and the second experiment (Exp. 2) was done with 1 (2-1), 3 (2-3), 5 (2-5), 6 (2-6), 7 (2-7) and 8 times (2-8) of daily feeding frequencies for 60 feeding days. In the Exp. 1, the fish grew from 2.0 g of initial body weight to 4.4 g (1-1), 6.1 g (1-2), 7.5 g (1-3), 9.1 g (1-4), 9.8 g (1-5), and 10.8 g (1-6) in average weight for 40 days. The 1-6 groups grew highest during this period. The highest crude ash contents (2.4%) were achieved in the group of 1-1 while the highest crude lipid content (7.9~8.0%) was achieved from the groups of 1-5~6 in Exp. 1. The highest crude protein contents (15.0~15.5%) was achieved from the group of 1-3~6 in Exp. 1. In Exp. 2, fish grew from the initial body weight of 2.4 g up to 15.2 g (2-1), 37.5 g (2-3), 50.4 g (2-5), 53.6 g (2-6), 55.4 g (2-7), and 51.1 g (2-8) for 60 days and there were significantly higher in body weight of the groups of 2-6 and 2~7 compared to the groups of 2-3 and 2-1. The moisture and crude ash contents of the group of 2-1 was significantly higher than other groups. The lipid contents of the group of 2-1 was lowest followed by 2-3 and all rest groups, 2-5~8. According to the result of this experiment, 6 times of feeding frequencies are proper for juvenile common carp. Compensation growth of juvenile common carp during feed deprivation for 40 days and after refeeding for 140 days was investigated. Six daily feeding frequencies were prepared (3？1~6). Fish was fed once to six times a day during feed deprivation phase. All groups were fed ad libitum six times a day during refeeding phase. Full compensation growth was achieved in 3-(4)-6 and 3-(5)-6 after refeeding for 140 days. Fish in the groups 3-(1)-6~3-(3)-6 achieved partial compensation growth.