Effects of astaxanthin supplementation in low-fishmeal feed on growth and antioxidant capacity of Oncorhynchus mykiss juvenile
The purpose of the study was to investigate the effects of astaxanthin supplementation in low-fishmeal feed on the growth performance,whole fish composition,serum biochemical indexes,and antioxidant capacity of serum and liver of triploid Oncorhynchus mykiss juveniles.In this study,240 Oncorhynchus mykiss juveniles with healthy constitution,uniform size and initial weight of(5.00±0.02)g were randomly selected and randomly divided into two groups,with four replicates in each group and 30 fish in each replicate.Two kinds of isonitrogen and isofat low-fishmeal feeds were designed,the control group was fed with low-fishmeal feed,and the experimental group was fed with 600 mg/kg astaxanthin in the low-fishmeal feed.The experiment lasted for 56 days.The results showed that compared with the control group,the weight gain rate,specific growth rate,and final weight of the experimental group increased by 10.24％,4.88％and 8.53％,respectively(P＜0.05).The serum aspartate aminotransferase and alanine aminotransferase activities,triglyceride and total cholesterol contents in the liver of Oncorhynchus mykiss in the experimental group were lower than those in the control group(P＞0.05),and the serum total cholesterol content was significantly lower than that in the control group(P＜0.05).Compared with the control group,the serum total antioxidant capacity,glutathione,and acid phosphatase activities of Oncorhynchus mykiss in the experimental group increased(P＞0.05),and the serum malondialdehyde content,catalase and alkaline phosphatase activities decreased(P＞0.05).Compared with the control group,the total antioxidant capacity and superoxide dismutase and catalase activities of Oncorhynchus mykiss in the experimental group increased by 120.00％(P＜0.05),16.55％(P＞0.05),and 39.29％(P＞0.05),respectively,and the malondialdehyde content decreased by 33.54％(P＞0.05).The results showed that the addition of 600 mg/kg astaxanthin to the low-fishmeal feed could significantly improve the growth performance and antioxidant capacity of Oncorhynchus mykiss juvenile,and improve the biochemical indexes of the body.
国家科技期刊平台
NSTL
万方数据
维普
