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首页> 外文期刊>Aquaculture Research >Relative efficacy of dietary administration of 3,5,3 '-triiodothyronine(T-3) to different stages of an Indian major carp, Cirrhina mrigala(Hamilton): Growth and economics
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Relative efficacy of dietary administration of 3,5,3 '-triiodothyronine(T-3) to different stages of an Indian major carp, Cirrhina mrigala(Hamilton): Growth and economics

机译：饮食管理3,5,3'-triiodothyronine（T-3）对印度大鲤鱼Cirrhina mrigala（Hamilton）不同阶段的相对功效：增长和经济学

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摘要

Different stages of an Indian major carp, Cirrhina mrigala (Hamilton), i.e. hatchling, fry and fingerling, were fed diets supplemented with 3,5,3'-triiodothyronine (T-3) at doses of 0, 1, 5 and 10 mg kg(-1) diet for 60 days, and then reared on a hormone-free diet for 120 days to study the growth performance of fish during the treatment period (TP) and post-treatment period (PTP). Oral administration of T-3 at all the stages resulted in a significantly higher specific growth rate (SGR) and better food conversion ratio (FCR) in comparison to the control group (P < 0.05). However, the growth response of C. mrigala towards T-3 administration appeared to be stage-specific. At the end of the experimental period of 180 days (60 days TP + 120 days PTP), the optimum dosage of T3 appeared to be 5.0 mg kg(-1) diet for both hatchlings and fry, and 1.0 mg kg(-1) diet for fingerlings, resulting in 62.08%, 30.22% and 13.33% higher weights than in the control group, respectively. The cost of hormone for production of 1 kg of fish was lowest in the case of hatchlings (Rs 0.54), followed by fry (Rs 7.00) and fingerlings (Rs 16.07). Hence, based on the degree of growth response of the fish towards T-3 administration in addition to its economics, only incorporation of T-3 in the diet of hatchlings appeared to be economical.
机译：分别给印度大鲤鱼的不同阶段（即汉密尔顿幼鱼），幼鱼，鱼苗和鱼种喂食添加了3、5、3'-三碘甲腺氨酸（T-3）的饲料，剂量分别为0、1、5和10 mg kg（-1）饮食60天，然后饲养无激素饮食120天，以研究鱼在治疗期（TP）和治疗后期（PTP）的生长性能。与对照组相比，在所有阶段通过口服T-3可以显着提高比生长率（SGR）和更好的食物转化率（FCR）（P <0.05）。但是，C。mrigala对T-3的生长反应似乎是阶段特异性的。在180天（60天TP + 120天PTP）的实验期结束时，对于幼鱼和鱼苗，T3的最佳剂量似乎分别为5.0 mg kg（-1）日粮和1.0 mg kg（-1）鱼种的饮食，分别比对照组高62.08％，30.22％和13.33％。孵化1公斤鱼的荷尔蒙成本最低（0.54卢比），其次是鱼苗（7.00卢比）和鱼种（16.07卢比）。因此，除了对鱼类的经济性以外，基于对T-3施用的鱼类生长反应程度，仅将T-3掺入孵化饲料中似乎是经济的。

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