摘要
以酪蛋白、明胶、糊精和去维生素E的鱼油为原料,配制成等氮等能的半纯化基础饲料,每100g基础饲料中分别添加VE0,10,20,40,60,80mg制成试验饲料,对淡化5d的河蟹大眼幼体和后继仔蟹进行了为期25d的饲养试验,探讨了VE 对大眼幼体和仔蟹生长、存活、蜕皮的影响和适宜需求量。结果表明,每100g饲料中分别添加20mg和40mgVE 时,Ⅲ期仔蟹的增重率、存活率和蜕皮频率均较高,分别为436.06 %,51.17 %和2.54及487.61 %,61.50 %和2.58;而VE 缺乏组,同期仔蟹的增重率、存活率和蜕皮频率最低,仅分别是264.94 %,26.17 %和2.21,但是当每100g饲料中VE 的添加量提高到80mg时,仔蟹的上述三项指标,不但没有随之升高,反而明显下降,并与VE 缺乏的对照组相接近,表明VE 添加过量,也会抑制仔蟹的正常生长、存活和蜕皮。VE 对仔蟹的正常生长发育、存活和蜕皮是必需的,其适宜添加量为每100g饲料中添加20～40mg。
A 25-day feeding trial was conducted to determine the optimum dietary vitamin E level for the Juvenile crab, Eriocheir sinensis from Megalopas to juvenile crabs at stage Ⅲ. Vitamin-free casein, gelatin, dextrin and fish oil were used as primary feedstuffs, and six isonitrogen and isocalrio purified experiment diets (E0, E1, E2, E3, E4 or E5) were formulated to supply different levels of dietary vitamin E (0, 10, 20, 40, 60, 80 mg/100 g diet respectively). The result showed that the weight growth rate, survival rate and ecdysis frequency of the juvenile crabs at stageⅢ fed with 20 mg/100 g diet and 40 mg/100 g diet were 436.06%, 51.17%, 2.54 and 487.61%, 61.50%, 2.58 respectively, significantly higher than those of other groups (P<0.05). and the weight growth rate, survival rate and ecdysis frequency of the juvenile crabs at stage Ⅲ were significantly reduced by feeding VE- deficient diets , such as E0 were 264.94%, 26.17% and 2.21 respectively. However these same criterions of the juvenile crab at stage Ⅲ fed with 80 mg/100 g diet lowered, similar to control group,Which were 253.31%, 29.83%, and 2.28 respectively. This indicated that excessive VE could reduce normal growth, survival and esdysis. Vitamin E is one of the essential nutrient for maintaining juvenile crab's normal development, survival, and ecdysis. The optimal vitamin E levels for juvenile crabs were 20～40 mg in 100 g diet.
出处
《海洋科学》
CAS
CSCD
北大核心
2002年第11期1-5,共5页
Marine Sciences
基金
高等学校博士点专项基金项目2000026903号
教育部回国留学人员科研启动基金项目部分资助。
关键词
中华绒螯蟹
仔蟹
维生素E
营养需求
Juvenile crab, Eriocheir sinensis, Vitamin E, Nutritional requirement
