Effects of adding taurine and astaxanthin to high-fat diet on growth performance,biochemical indexes,and antioxidant of Micropterus salmonoides

LÜ Xiaoyan; SHU Bin; CHEN Ying; WU Kunlan; ZHANG Lei

doi:10.13557/j.cnki.issn1002-2813.2025.24.012

Abstract：This experiment aimed to investigate the effects of adding taurine and astaxanthin to the high-fat diet on the growth performance,biochemical indexes,and antioxidant indexes of Micropterus salmonoides.A total of 240 healthy juveniles Micropterus salmonoides with similar physical condition and an initial weight of(20.20±0.02)g were randomly divided into four groups,with three replicates per group,and 20 fish per replicate.According to the principle of equal energy and nitrogen,the positive control group(group D1)was fed the basal diet(with a crude fat content of 11.47%),while the negative control group(group D2)was fed the high-fat diet(with a crude fat content of 16.58%).Group D3 and group D4 were respectively supplemented with 0.3%taurine and 0.06%astaxanthin in the high-fat diet.The pre-test period was seven days,and the formal test period was 56 days.The results showed that compared with group D1,the specific growth rate(SGR)of group D2 was significantly increased 9.57%(P<0.05).Compared with group D2,the serum triglyceride content in group D4 was significantly reduced(P<0.05),and the activity of aspartate aminotransferase in group D3 was significantly reduced(P<0.05).The activity of lipoprotein esterase in the liver of group D4 was no significant difference(P<0.05).Compared with group D2,the activities of serum superoxide dismutase(SOD)and glutathione peroxidase(GSH-Px)were significantly increased in groups D3 and D4(P<0.05).The activity of catalase(CAT)in the serum and liver of group D4 was significantly increased(P<0.05),while the content of malondialdehyde(MDA)was significantly reduced(P<0.05).The study shows that adding taurine or astaxanthin to high-fat feed can effectively enhance the lipid metabolism ability of Micropterus salmonoides and significantly alleviate the oxidative damage caused by the high-fat diet.