蝇蛆粉替代鱼粉对杂交黄颡鱼生长性能、体组成和抗氧化能力的影响

研究旨在评估蝇蛆粉(MGM)替代鱼粉(FM)对杂交黄颡鱼(Pelteobagrus fulvidraco)"黄优1号"幼鱼生长、体组成和抗氧化能力的影响。实验设计6组等氮(粗蛋白42%)饲料,分别使用蝇蛆粉替代0、20%、40%、60%、80%和100%的鱼粉蛋白,分别记为G0、G20、G40、G60、G80和G100。将初始体重为(0.62±0.01) g的杂交黄颡鱼幼鱼随机分为6组,进行为期8周的投喂实验。实验结束时测定其生长性能、全鱼体组成和肝组织与血清中的抗氧化酶活性(SOD、CAT、GR和T-AOC)。结果显示:(1)与G0相比, G20与G40组杂交黄颡鱼幼鱼的特定生长率并未出现显著性差异(P>0.05), G60、G80与G100组的幼鱼的特定生长率表现出显著的负面影响(P<0.05)。与G0相比, G20与G40组的饲料系数并未出现显著性差异(P>0.05),G60、G80与G100的饲料系数显著性升高(P<0.05)。不同替代组杂交黄颡鱼幼鱼的存活率没有显著差异(P>0.05)。(2)各替代组杂交黄颡鱼幼鱼的全鱼体组成与形体指标没有显著差...

EFFECTS OF SUBSTITUTION OF FISH MEAL WITH MAGGOT MEAL ON GROWTH PERFORMANCE,BODY COMPOSITION AND ANTIOXIDANT CAPACITY OF HYBRID YELLOW CATFISH

This study evaluated the effects of diets containing maggot meal (MGM) in substitution of fishmeal (FM) on growth performance and antioxidant capacity of hybrid yellow catfish. Six isonitrogenous (crude protein content was 42%) experimental diets were formulated by replacing 0 (G0 as control diet), 20% (G20), 40% (G40), 60% (G60), 80% (G80), and 100% (G100) of FM with MGM. Each diet was fed to triplicate groups of fish for 8 weeks with the initial fish weight of (0.62±0.01) g. Growth performance and antioxidant enzyme activity (SOD, CAT, GR, T-AOC) in liver tissue and serum were determined at the end of the trial. The results showed that: (1) Compared with the control diet, FM had no significant effect on growth performance in G20 and G40 (P>0.05), and significant negative effect on G60, G80 and G100 group effect (P<0.05). Compared with the G0 diet, FM had no significant effect on feed conversion ratio (FCR) in G20 and G40 (P>0.05) and a significant negative effect on G60, G80 and G100 group (P<0.05). FM had no significant effect on survival ratio. (2) Body composition and physical indexes between hybrid yellow catfish are similar among groups (P>0.05). (3) The activities of superoxide dismutase (SOD), catalase (CAT), and glutathione reductase (GR) in the serum and liver of hybrid yellow carp in the G20 group were slightly higher than those in the G0 group but without significant difference (P>0.05). Liver CAT activity and total antioxidant capacity (T-AOC) increased significantly in G40 (P<0.05) compared with control group. GR and SOD activities in liver, SOD activity and T-AOC in serum decreased significantly in the G80 group (P<0.05) compared with control group. In summary, the fly pupae protein can replace 40% of fish meal without significantly negatively affecting the growth performance, body composition and antioxidant capacity of hybrid yellow catfish.