Effects of Natuzyme multi enzyme in the diet on growth factors, survival rate and reproductive performance of gold fish )Carassius auratus gibelio)

Adding various enzymes compounds to the diet is a potential way to improve the nutritional value of nutrients. Natuzyme multi-enzyme contains protease, lipase, phytase, alpha-amylase, cellulase, amyloglucosidase, beta-glucanase, pentosonase, hemicellulase, xylanase, pectinase, acid phosphatase and phytase acid. Therefore, it seems Natuzyme multi-enzyme can be used to increase digestibility, eliminating anti-nutritional agents and improve the growth indices and reproductive performance of gold fish (Carassius auratus gibelio), and generally improve nutritional status.The purpose of this experiment is to use multi-enzyme Natuzyme in the Gold Fish diet (Carassius auratus</em>) and to investigate its effects on growth, survival and reproductive performance. For this experiment, the fishes with the average weight of 5.56 ± 0.03 grams were used, and Natuzyme multi enzyme Plus® (Bioproton, Australia) in 5 treatments of 0, 250, 500, 750 and 1000 mg / kg food was added to the supplementary diet. The multi enzyme at enzyme level of 1 (250 mg / kg diet) established the best weight gain, specific growth rate, feed conversion ratio, body weight gain percentage and protein efficiency which was significantly different with the control group (P <0.05) but did not affect the survival rate (P> 0.05). The Natuzyme multi enzyme at enzyme level of 2 (500 mg / kg diet) produced the highest gonadosomatic index, fecundity, fertilization rate and larval survival rate (P <0.05). However, this multi enzyme at none of the experimental groups had any effect on hatchability and sperm motility (P> 0.05). It is suggested using this multi-enzyme in fish diets with high economic value and improve the growth and reproductive performance of fish.