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在水温(26±2)℃、自然光照条件下,以长吻(Leiocassis longirostris)、异育银鲫(Carassius auratus gibelio)和草鱼(Ctenopharyngodon idellus)为研究对象,设定3种投喂方式。实验饵料为水蚯蚓(Limnodrilus hoffmeisteri)。第1种方式为连续投喂,整个实验期间不间断;第2种连续投喂4 d后饥饿1 d;第3种连续投喂2 d后饥饿1 d。3种方式分别以S0(对照组)、S1/4和S1/2表示。实验周期均为30 d。结果显示,长吻和异育银鲫在3种处理条件下的终体重无显著差异,草鱼在S0组(对照组)和S1/4组的终体重无显著差异,S1/2组的终体重显著降低。这表明,长吻和异育银鲫在S1/4和S1/2组时具有完全补偿生长现象,而草鱼只在S1/4组具有完全补偿生长现象,在S1/2组则发生部分补偿生长。结论认为,长吻和异育银鲫的补偿生长能力要强于草鱼。3种鱼在不同处理条件下的饲料转化效率和蛋白质效率比都没有显著差异,补偿生长是通过提高实际摄食率实现的。
Three feeding methods were set up under the condition of water temperature (26 ± 2) ℃, natural lighting conditions, including Leiocassis longirostris, Carassius auratus gibelio and grass carp Ctenopharyngodon idellus. Experimental diets were water earthworms (Limnodrilus hoffmeisteri). The first way was continuous feeding, uninterrupted throughout the experiment; the second one starved for 1 day after 4 days of continuous feeding; the third starved for 1 day after 2 days of continuous feeding. The three ways were S0 (control group), S1 / 4 and S1 / 2 respectively. The experimental period is 30 d. The results showed that there was no significant difference in final body weight of long-necked and allogynogenetic crucian carp (Carassius auratus gibelio) under the three treatment conditions. The final body weight of grass carp did not differ significantly between S0 group and S1 / 4 group. The final weight of S1 / 2 group Significantly lower. The results showed that the long-kiss and allogynogenetic crucian carp (Carassius auratus gibelio) fully compensated for growth in the S1 / 4 and S1 / 2 groups, while the grass carp only completely compensated for growth in the S1 / 4 group and partially compensated for growth in the S1 / 2 group . The conclusion is that the compensatory growth ability of long-necked and allogynogenetic crucian carp is stronger than that of grass carp. There was no significant difference in feed conversion efficiency and protein efficiency between the three species of fish under different treatment conditions, and compensatory growth was achieved by increasing the actual feeding rate.