Effects of cycle of starvation-refeeding on the compensatory growth performance of Cyprinus carpio haematopterus new strain juveniles

Abstract:

In order to explore characteristics of compensatory growth of juvenile Cyprinus carpio haematopterus new strain in cycle of starvation-feeding, we chose 360 juveniles with the initial mean weight of (23.44±3.21) g, and divided them into 4 groups randomly, each group was set to 3 repeats containing 30 individuals. Fish were fed in four feeding schedules as follows: Starvation A:5 days starvation (S)-20 days feeding (F)-5 S-20 F-5 S-20 F; Starvation B: 7 S-28 F-7 S-33 F; Starvation C: 15 S-60 F; Control group Con: 75 F. The experiment lasted 75 days. The results show that: (1) In the recovery of satiation period after starvation, the specific growth rate (SGR) of the A group was 1.70%, significantly higher than that of the group B of 1.08%, group C of 0.87% and Con of 0.60%; (2) During the starvation period, the specific growth rate of body length (SGR_L) of three treatment groups was significantly lower than that of the Con, but significantly higher than Con after refeeding. (3) At the starvation period, the specific growth rate of condition factor K (SGR_K) of group A was significantly lower than those in the group B, C and Con, but significantly higher after the satiation period. (4) the feed rate of A in the treatment group was 8.7%, higher than the other two groups. Based on the SGR as the main evaluation index, the results indicated that the way 5 days starvation (S)-20 days feeding (F) can arouse juvenile Cyprinus carpio new strain to have partially compensatory growth effect and save 8.7% of the feed consumption.