摘要
从雨生红球藻中提取虾青素,以不同质量浓度(0、20、40、60、80、100 mg/kg)添加到凡纳滨对虾的饲料中投喂7周,研究虾青素对凡纳滨对虾生长、存活和抗氧化能力的影响。结果显示,虾青素可提高凡纳滨对虾的存活率和特定生长率,其中添加量80 mg/kg组最高,80 mg/kg组特定生长率和对照组间差异显著(P<0.05),但试验组和对照组间存活率无显著差异(P>0.05)。各试验组的总抗氧化能力与对照组相比显著升高(P<0.05),至第4周后逐步稳定;超氧化物歧化酶活力和过氧化氢酶活力与对照组相比均显著降低,且均表现出先降后升的变化趋势,第4周酶活力降至最低。以生长、存活和抗氧化能力为指标,虾青素的最适添加量为80 mg/kg,最佳投喂时间为4周。
Abstract： The astaxanthin extracted from alga Haematococcus pluvialis was added to the feedstuff of Pacific White Shrimp Litopenaeus vannarnei with different supplementation levels（0, 20, 40, 60, 80 and 100 mg/kg diet）for 7 weeks, which aimeds to determine the effects of astaxanthin on growth, survival and antioxidant capability. The results showed that astaxanthin increased the survival rate and the specific growth rate（SGR）, which were higher in the supplementation level of 80 mg/kg group than other groups. The specific growth rate in 80 mg/kg group was improved significantly（P〈0.05）. There was no significant differences（P〉0.05） in the survival rate between experimental and control groups. Antioxidant capability of experimental group shrimps was significantly increased（P〈0.05） and the trend was increased after 4 weeks. Superoxide dismutase （SOD） activity and catalase（CAT）activity of experimental group shrimps were significantly lower（P〈0.05）than those in the control groups, which decreased with increasing feeding days, and the trend was changed to gradually increasing 4 or 5 weeks later. Based on survival rate, specific growth rate and antioxidant capability, supplementation of 80 mg/kg astaxanthin was most effective and the optimal feeding time was 4 weeks.
出处
《水产科学》
CAS
北大核心
2009年第3期126-129,共4页
Fisheries Science
基金
河北省自然科学基金资助项目(C2007000193)
关键词
虾青素
凡纳滨对虾
存活率
特定生长率
抗氧化能力
astaxanthin
Litopenaeus vannamei
survival rate
specific growth rate
antioxidant capability
