| 摘要: |
| 采用单因子实验设计方法, 进行了饲料中添加维生素C对美国红鱼生长(平均增重率、存活率、特定生长率、饲料效率)和免疫反应[血清中溶菌酶活性、血清总补体活性和超氧化物岐化酶(SOD)活性]影响的研究。结果表明: 随着饲料中维生素C添加水平由0提高到100mg/kg时, 美国红鱼的增重率和特定生长率显著提高。以特定生长率为指标, 美国红鱼最佳生长性能的饲料维生素C添加量为104.5mg/kg左右; 饲料中维生素C水平在0—98.9mg/kg时, 美国红鱼肌肉和肝脏中维生素C的积累量随饲料中维生素C的增加而显著增加(P<0.05); 美国红鱼获得最大肝脏和肌肉中维生素C的积累量时饲料中维生素C最低添加量为128.1和104.0mg/kg; 美国红鱼血清溶菌酶和血清总补体活性在维生素C添加水平分别为98.9和198.7mg/kg时达到最高值, 随后变化不明显; 美国红鱼血清SOD活性随维生素C添加水平的增加而显著升高, 并且活性在198.7mg/kg达到最高值, 随后显著下降。综上所述, 美国红鱼维生素C生长和免疫的维生素C适宜添加水平为200mg/kg左右。 |
| 关键词: 美国红鱼 维生素C 生长 免疫力 |
| DOI：10.11693/hyhz201304040040 |
| 分类号: |
| 基金项目:广东省海洋生物技术重点实验室开发基金, GPKLMB201202号; 广东省自然科学基金项目, S2011010005079号; 惠州市科技计划项目, 2011B040010003号; 惠州学院自然科学基金重点项目, C503.0202号。 |
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| EFFECTS OF DIETARY VITAMIN C ON GROWTH AND IMMUNE RESPONSE OF RED DRUM SCIAENOPS OCELLATUS |
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WANG Jian-Gang
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Key Laboratory of East China Sea & Oceanic Fishery Resources Exploitation and Utilization, Ministry of Agriculture, East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences
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| Abstract: |
| An experiment was conducted to study the effects of dietary vitamin C on growth (weigh rate, feed efficiency ratio, specific growth rate and survival rate) and immune response (lysozyme activity, total complement activity, and SOD activity) of red drum Sciaenops ocellatus L. Results indicate that after 8 weeks of the feeding trial, the weight rate, feed efficiency ratio, and specific growth rate of red drum increased significantly with increasing dietary vitamin C from 0 to 98.9mg/kg (P<0.05). However, for those that did not increase significantly with increasing dietary vitamin C from 98.9 to 1987.4mg/kg (P>0.05), the optimal dietary vitamin C level for maximum growth is about 106mg/kg of dietary vitamin C; tissue vitamin C concentrations of this fish fed with the control diet were significantly lower than those with vitamin C enriched diets (P<0.05), the vitamin C concentration in liver and muscle increased significantly with increasing dietary vitamin A from 0 to 98.9mg/kg (P<0.05), but no significant differences were observed among fish fed the diets with equal to or higher than 98.9mg/kg of vitamin C (P>0.05). red drum maintained the greatest vitamin C concentration in liver and the lowest vitamin C demand level when fed 128.1mg/kg of dietary vitamin C, red drum maintained greatest vitamin C concentration in muscle and lowest vitamin C demand level when fed 104.0mg/kg of dietary vitamin C; the lysozyme activity, SOD activity and total complement activity of the fish fed with the control diet were significantly lower than those with vitamin C enriched diets. Red drum had the maximal level of lysozyme activity when fed 98.9mg/kg of dietary vitamin C, and no significant differences were observed among fish fed the diets with equal to or higher than 98.9mg/kg of vitamin C (P>0.05). Red drum had the maximal level of total complement activity when fed 98.9 and 198.7mg/kg, and no significant differences were observed among fish fed the diets with equal to or higher than 198.7mg/kg of vitamin C (P>0.05). Red drum had the maximal level of SOD activity when fed 198.7mg/kg of dietary vitamin C, then decreased significantly. Based on the information above, the optimal dietary vitamin C level for optimum growth performance and immune response in red drum is about 200mg/kg. |
| Key words: red drum Sciaenops ocellatus Vitamin C growth immunity response tissue concentration |
