Influence of supplementary enzymes Avizyme on fish meal replacement by soy bean meal and its effects on growth performance and survival rate of rainbow trout (Oncorhynchus mykiss)
Subject Areas : New Technologies in Aquaculture Development
Keywords: growth performance, Survival rate, Rainbow trout (Oncorhynchus mykiss), Keywords: Soybean meal, Enzyme (Avizyme),
Abstract :
Abstract[1] This study was carried out to evaluate the influence of Avizyme multi enzyme and replacement of fish meal protein by soy bean meal protein on growth performance and survival rate of rainbow trout (Oncorhynchus mykiss). Experimental diets containing four levels of replacement (25, 50, 75 and 100%) and three levels of Avizyme multi enzyme (0, 500, 1000 units/kg) were formulated and prepared. By the means a diet with fish meal as the only source of protein was used as the control. Thirteen treatments and three replicates were used in this study. Specimens in 89.40±4.01gr mean weight were stocked in aboundance of 30 fish per each tank and fed experimental diets during the 8 weeks period of study. The results showed that supplementary multi enzyme (Avizyme) caused an increase in growth and survival rate. Effects of enzyme were positive and 1000 ppm showed the best results with at least 39% replacement of fish meal by soy bean meal as a suitable formula for rainbow trout. *- Corresponding Author; E-mail: shgh_science@yahoo.com
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