Effects of dietary red koji rice on growth performance, body colour and some hematological and hepatopancreas biochemical indices of juvenile red-white koi carp Cyprinus carpio
CUI Pei, SHANG Dongwei, LIU Wenjun, SUN Jinhui
1.Tianjin Key Laboratory of Aqua-ecology and Aquaculture, Tianjin Agricultural University, Tianjin 300384, China; 2.Tianjin Goho Fish Breeding Company Limited, Tianjin 301811, China
Abstract: A feeding trial was conducted to evaluate the effects of dietary red koji rice on growth performance, body colour and some hematological and hepatopancreas biochemical indices of juvenile red-white koi carp Cyprinuscarpio.The red-white koi carp with body mass of(8.79±1.80)g were reared in a plastic tank and fed basic diet(control group)and supplemented with red koji rice at a dose of 0, 0.5, 1.0, 1.5, and 3.0 mg/kg diet for 56 days, and then fed the diet without red koji rice for 14 days at water temperature of(25.0±1.0)℃.Each diet was randomly assigned to triplicate groups of 30 juvenile koi carp.The results showed that the fish fed the diets supplemented with red koji rice had significantly higher weight gain(WG), specific growth rate(SGR), feed efficiency(FE)and lower glucose concentrations and aspartate transaminase(AST)activity(P<0.05).There was significantly higher glutathione peroxidase(GSH-PX)activity in the fish fed the diets containing red koji rice of 1.5 g/kg, and significantly higher malondialdehyde(MDA)concentration in the fish in the high dose red koji rice group(3.0 g/kg)(P<0.05).No significant influence of the dietary red koji rice levels on superoxide dismutase(SOD)and catalase(CAT)activities was observed in the hepatopancreas of the fish fed the diets containing red koji rice(P>0.05), with the maximal a* value and carotenoids concentration in the skin of the fish fed the diet containing red koji rice at dose of 1.0 g/kg.The fish fed the diet containing red koji rice at dose of 1.0 g/kg had significantly higer a* than those animals fed the basal diet did(P<0.05), even 7th or 14th days after all the fish fed the diet without red koji rice.In conclusion, the findings indicated that dietary addition of red koji rice led to improve growth performance, and adjust glucose concentrations, with significant impact on the body colour of juvenile koi carp and the optimal level of 1.0 g/kg under this experimental conditions.
崔培, 尚东维, 刘文军, 孙金辉. 饲料中添加红曲米对红白锦鲤幼鱼生长、体色及生化指标的影响[J]. 大连海洋大学学报, 2021, 36(4): 595-602.
CUI Pei, SHANG Dongwei, LIU Wenjun, SUN Jinhui. Effects of dietary red koji rice on growth performance, body colour and some hematological and hepatopancreas biochemical indices of juvenile red-white koi carp Cyprinus carpio. Journal of Dalian Ocean University, 2021, 36(4): 595-602.
2021, Vol. 36 
