Effects of feed supplementing with Spirulina meal (Spirulina platensis) and recombinant insulin-like growth factorⅠ on growth performance of Kikuchi minnow (Aphyocypris kikuchii)
Date Issued
2014
Date
2014
Author(s)
Chen, Hsin-Fu
Abstract
The first part of this study evaluate the effects of diets containing 20% of corn gluten meal, and substituting 0, 25, 50, 75 and 100% Spirulina platensis for that, i.e. Spirulina platensis accounts for 0, 5, 10, 15, 20% of the feed formula respectively, on growth performance of kikuchii minnow (Aphyocypris kikuchii). A completely randomized experimental design is developed with the abovementioned five treatments and three replicates. 225 kikuchii minnow with average initial weight of 0.60 ± 0.09g are assigned to 5 experimental tanks. The experiment lasts for 9 weeks. Kikuchii minnows fed with 15% S. platensis show a significantly higher weight gain﹑feed efficiency﹑protein efficiency ratio and daily N increase than those which are fed with 0% S. platensis (p<0.05).
According to previous studies, kikuchii minnow often has a relatively lower growth rate. That further leads to the second part of this study, which not only contains the same 5 groups of feed formula as the first one, but supplements each one with 0.5% recombinant insulin-like growth factor Ⅰ(IGF-Ⅰ). The average initial weight of 150 kikuchii minnow is 0.78±0.04g. The group fed with 15% S. platensis also shows significantly higher performances in all parameters than those which are fed with 0% S. platensis (p<0.05). Both parts of the study show no casualty.
The present results demonstrate that S. platensis could be introduced as a substitute in kikuchii minnow diets without compromising their growth and might even be a booster. The improved growth and feed utilization are probably due to enhancement of protein assimilation. As the results indicate, the proper dietary Spirulina meal level is 15%. In addition, supplementing with 0.5% IGF-Ⅰwill cast a positive effect on their growth performance.
Subjects
菊池氏細鯽
螺旋藻粉
玉米筋質粉
重組類胰島素成長因子I
蛋白質效率
每日氮增量
成長
Type
thesis
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