L-肉碱强化卤虫对草鱼开口苗生长、生命力及其RNA/DNA比率的影响  

Effects of L-carnitine enriched artemia on growth,vitality and RNA/DNA ratio in first feeding larvae of grass carp(Ctenopharyngodon idella)

作　　者：陈玉珂[1] 徐静[1] 蔺丽丽[1] 宋丹[1] 董婧[1,2] 吴莉芳[1] 周敏 张东鸣[1] 

机构地区：[1]吉林农业大学动物科技学院,吉林长春130118 [2]沈阳农业大学畜牧兽医学院,辽宁沈阳110866 [3]吉林省扶余县水产技术推广站,吉林扶余131200

出　　处：《西北农林科技大学学报（自然科学版）》2010年第12期57-62,共6页Journal of Northwest A&F University(Natural Science Edition)

基　　金：国家自然科学基金项目(30671621)

摘　　要：【目的】研究L-肉碱强化卤虫对草鱼开口苗生长性能的影响,为草鱼开口苗培育技术的完善提供参考。【方法】用0(对照),1,100,1000mg/L的L-肉碱强化卤虫无节幼体(Artemia sp.)12h,投喂给草鱼(Ctenopha-ryngodon idella)开口苗,分别于7,14,21d取样测定鱼苗的体长、体质量,21d时取样测定生命力及鱼体RNA/DNA比率的变化。【结果】1mg/LL-肉碱强化卤虫处理组草鱼开口苗的体长、体质量、体长日增长率和特定生长率均显著高于其他3组(P<0.05);100mg/LL-肉碱强化卤虫处理组开口苗的生命力较其他3组有升高趋势(P>0.05);100,1000mg/LL-肉碱强化卤虫处理组开口苗的RNA/DNA比率显著高于对照组(P<0.05),1mg/LL-肉碱强化卤虫处理组开口苗的RNA/DNA比率与对照组之间差异不显著(P>0.05)。【结论】以1mg/LL-肉碱强化卤虫投喂草鱼开口苗,可明显提高草鱼开口苗的生长性能;过高质量浓度L-肉碱强化卤虫对草鱼开口苗生长没有影响,但能提高其体内的RNA/DNA比率。[Objective] Effects of L-carnitine enriched artemia on growth,vitality and RNA/DNA ratio in the first feeding larvae of freshwater grass carp（Ctenopharyngodon idella） were studied to offer basis to improve the culturing technology of larvae.[Method] The newly hatched artemia nauplii,enriched with 4 levels（0,1,100,1 000 mg/L） of L-carnitine for 12 h,were used as starter food for rearing larvae.[Result] Results indicated that the growth of larvae was significantly（P〈0.05） improved by feeding 1 mg/L L-carnitine enriched nauplii;Vitality of larvae was improved by feeding 100 mg/L L-carnitine enriched nauplii,but statistics did not show significant differences（P〈0.05）;There was significantly（P〈0.05） higher RNA/DNA ratio for larvae in 100 and 1 000 mg/L L-carnitine enriching groups than in the control,no significant differences（P〈0.05） were observed on RNA/DNA ratio for larvae between 1 mg/L L-carnitine enriching group and the control.Results suggest that growth performances and survival of freshwater larvae might be improved by L-carnitine supplementation.[Conclusion] Therefore,the 1 mg/L L-carnitine enriched nauplii could remarkably enhance the growth performance of the first feeding larvae of grass carp.The higher concentrate L-carnitine enriched nauplii could not affect the growth performance of the first feeding larvae of grass carp,but could increase RNA/DNA ratio.

关 键 词：L-肉碱 强化卤虫 草鱼 开口苗 生长性能 RNA/DNA比率 

分 类 号：S963.16[农业科学—水产养殖]