投喂蝇蛆对中国明对虾生长及生化组成的影响

在试验生态水槽系统内,研究蝇蛆在日粮中不同配比对中国明对虾幼虾生长及生化组成的影响。以蝇蛆在日粮中的所占比例设计了5个梯度组合,经过35d投喂,对虾体长、体质量、特定生长率和成活率升高,对虾肌肉水解氨基酸的总量及其中的必需氨基酸、呈味氨基酸含量增加;在配合饲料中混合投喂3/8以上的蝇蛆可显著提高中国明对虾幼虾的生长速率(P0.05)。对虾肌肉中∑n-3HU-FA、∑n-6HUFA的相对含量随着蝇蛆投喂量的增加而增加,蝇蛆投喂组的必需脂肪酸相对含量均显著低于对照组,多不饱和脂肪酸显著高于对照组。C22∶6n-3/C18∶2n-6比值显著高于对照组,且随着蝇蛆投喂量的增加比值增加。

Effects of Dietary Fly Maggot Musca domestica on Growth and Body Compositions in Chinese Shrimp Fenneropenaeus chinensis Juveniles

Chinese shrimp Fenneropenaeus chinensis juveniles were cultured in experimental ecological tanks,and fed the diets containing different proportions of fly maggot Musca domestica to study the effects of dietary fly maggots on the growth performance and body compositions in the shrimp for 35 days. The results showed that there was enhancement in body length,body weight,specific growth rate and survival with increase in the dietary fly maggots. Similar cases were also found in the total quantity of hydrolytic amino acids as well as essential amino acids,and the taste amino acid content in the shrimpmuscles. The shrimp had significantly higher growth when they fed the diets containing 3/8 or more fly maggots (P<0.05). The contents of ∑n-3 HUFA and ∑n-6 HUFA in the shrimp muscles were found to increase with the increase in the proportion of the fly maggots in the diets. There were significantly lower contents of the essential fatty acids and higher polyunsaturated fatty acids in the muscles of the shrimp fed the fly maggots than those in the shrimp in the control group (P<0.05). Furthermore,the ratio of C22∶6n-3/C18∶2n-6 was found significantly higher in the muscles of the shrimp fed the fly maggots than that in the control group,the values being enhancement with increase in the contents of the fly maggots.