首页> 外文期刊>Turkish Journal of Fisheries & Aquatic Sciences >Effect of Diet Regimes on Growth, Trypsin Activity and RNA: DNA Ratio in Fenneropenaeus indicus Postlarvae
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Effect of Diet Regimes on Growth, Trypsin Activity and RNA: DNA Ratio in Fenneropenaeus indicus Postlarvae

机译:饮食制度对印度对虾(Fenneropenaeus indicus)幼虫生长,胰蛋白酶活性和RNA:DNA比的影响

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摘要

In an effort to evaluate the usage of natural diets in nursery feeding of Fenneropenaeus indicus (H. Mihie Edwards) postlarvae, different feeding regimes that included commercial diet, natural diets and microalgae were tried out. After 10 days feeding, growth rate, survival, protein content, muscle RNA and RNA: DNA ratio of postlarvae fed mixed diet were significantly higher (P<0.05). Artificial diet alone fed postlarvae registered lowest values and were significantly poorer than rest of the treatments (P<0.05). No significant difference among treatments could be detected in trypsin activity (P=0.388). Correlation analysis confirmed significant relationship between growth rate and RNA: DNA ratio of postlarvae (r=0.90, P<0.001). Two weeks long pond experiment exhibited strong relationship between RNA: DNA ratio of postlarvae prior to stocking and post-stocking survival (r=0.78, P<0.001). Results from study confirm that supplementation of natural diets in artificial diet regime with or without inclusion of microalgae will enhance growth. But, presence of microalgae further improved the results by offering nutrition and stability. Pond experiments suggest possible use of RNA: DNA ratio as 'survival probability indicator' in commercial shrimp culture
机译:为了评估天然饮食在印度对虾(Fenneropenaeus indicus(H. Mihie Edwards))幼体的苗圃喂养中的使用,尝试了不同的喂养方式,包括商业饮食,自然饮食和微藻。喂食10天后,喂食混合饲料的幼虫的生长速度,存活率,蛋白质含量,肌肉RNA和RNA:DNA比率均显着较高(P <0.05)。单独饲喂幼虫后的人工饮食记录最低值,并且显着低于其余治疗(P <0.05)。胰蛋白酶活性之间没有发现显着差异(P = 0.388)。相关分析证实了幼虫的生长速度与RNA:DNA比率之间存在显着的相关性(r = 0.90,P <0.001)。在为期两周的池塘实验中,放养前幼体的RNA:DNA比与放养后存活率之间存在密切关系(r = 0.78,P <0.001)。研究结果证实,在人工饮食中添加或不包含微藻类的自然饮食将促进生长。但是,微藻的存在通过提供营养和稳定性进一步改善了结果。池塘实验表明在商业虾类养殖中可能使用RNA:DNA比率作为“存活概率指标”

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