This experiment aims to explore the impact of substituting maggot meal for fish meal on growth performance, body composition, body color and some serum immune indicates. 360 Cyprinus carpio L., with an original weight of (120.24±4.36) g apiece, were selected and divided at random into three parallel groups. The control group fed on basal feed. six types of experimental feed (G0, G20, G40, G60, G80 and G100) were compounded over the course of 60 days by substituting maggot meal for 0%,20%, 40%, 60%, 80% and 100% of fish meal in basal feed respectively. The results showed that substitution of maggot meal for any amount of fish meal did not make any significant difference for experimental fish in terms of survival rate, muscular water, crude ash, carbon, total phosphorus and AKP (P>0.05). For G20 and G60, such substitution did not show any significant difference in terms of final weight, WGR and sGR of the experimental fish(P>0.05) and for G80 and G100, it decreased significantly (P<0.05). For G20 and G40, FCR of the experimental fish did not show any significant difference with that of the control group (P>0.05). For G60 and G100, FCR of the experimental fish rose significantly (P<0.05). Muscular crude protein content of the experimental fish rose proportionately with the addition of the substitution level. For G20 and G60, there was no significant difference compared with the control group, and it was much higher in G80 and G100 than in the control group (P<0.05). Crude fat and sOD in substitution groups fell significantly with the addition of the substitution (P<0.05). As for the impact of the substitution on body color, the chromatic values increased significantly in all experimental groups (P<0.05)except in G20 (P>0.05). To sum up, the ratio of substitution of maggot meal for fish meal may not preferably exceed 60% with assessment indicates of growth performance, muscle composition, body-surface chromatic values and some serum non-specific immunity.

为研究几种鱼类常用催产剂对锦鲤的催产效果,分别给性腺发育成熟的锦鲤亲鱼注射HCG+LHRH-A2(A组)、PG+ HCG+ LHRH-A2(B组)、DOM+ LHRH-A2(C组)、复方促性腺激素释放激素类似物(D组)和“双生”牌注射用高效鱼用催产剂(E组)进行人工催产,比较不同外源催产激素对锦鲤亲鱼产卵和排精效果的影响.试验结果表明,各组催产剂均能在水温20 ～ 22℃下诱导亲鱼排卵、排精.其中,注射两种复合催产剂的D组、E组催产效果最佳,雌鱼效应时间为11 ～18 h,催产率均为100％,平均产卵量分别为(23.93 ±2.31)粒/g、(22.62 ±2.81)粒/g,受精率分别为(86.44±2.9)％、(85.28±3.2)％,孵化率为(79.44±2.70)％、(78.65±3.10)％;雄鱼24 h内的采精量分别为1461、1 456 mL,精子的寿命分别为(125.34±8.70)s、(125.26±9.40)s,精子的活动强度分别为(48.31 ±8.90)s、(47.89 ±8.40)s,且采精率分别为(69.57±5.25)％、(68.74±4.32)％,产后亲鱼的死亡率均为0.各组精子的寿命、采精率均显著高于对照组(P＜0.05),但A、B、C组精子的活动强度与对照组相比无显著性差异(P＞0.05).