Acta Agriculturae Boreali-Sinica ›› 2022, Vol. 37 ›› Issue (3): 231-238. doi: 10.7668/hbnxb.20192837

• Animal Husbandry· Fisheries· Veterinarian • Previous Articles    

Effects of Nano-selenium on Serum Antioxidant and Immune Indexes of Oncorhynchus mykiss under Heat Stress

LU Junhao, LI Lanlan, QUAN Jinqiang, ZHAO Guiyan, SUN Jun, LIN Qiaorong, LIU Zhe   

  1. College of Animal Science and Technology,Gansu Agricultural University,Lanzhou 730070,China
  • Received:2022-03-12 Published:2022-06-30
  • Contact: LIU Zhe

Abstract:

In order to study the effects of nano-selenium on serum antioxidant and immune indexes of rainbow trout under heat stress,600 8-month-old rainbow trout with an average body weight of 80 g were selected and randomly divided into 3 groups:the control group was fed with the basal diet,and the experimental groups were fed with 5,10 mg/kg nano-selenium diets.The rainbow trout was fed at the suitable growth water temperature(18 ℃)for 9 days,At 24 ℃ (heat stress for rainbow trout)for 48 h.10 fish were randomly selected from each group before heat stress(18 ℃,0,3,6,9 d)and after heat stress(24 ℃,4,8,12,24,48 h)and serum was collected to determine antioxidant and immune indexes.The results showed that compared with the control group,the experimental group significantly increased the contents of TP,ALB and GLB in serum(P<0.05);the activity of GSH-Px and SOD were significantly decreased,as well as CAT and MDA were significantly increased in heat stress,but the addition of nano-selenium significantly increased the activity of GSH-Px,SOD,CAT and decreased MDA activity;the contents of tumor necrosis factor-α(TNF-α) and interleukin-1β(IL-1β) in serum of the control group were gradually increased by heat stress. The contents of TNF-α and IL-1β in serum of the 5 mg/kg nano-selenium group were significantly increased at 4 h, and the contents of IL-1β were significantly decreased at 12 h compared with the control group.The content of IgM decreased at 4 h and increased at 12 h after heat stress,and nano-selenium supplementation significantly increased the activity of IgM;after heat stress,the content of C3 decreased gradually,but the addition of nano-selenium significantly increased the activity of C3.In conclusion,dietary nano-selenium supplementation can improve the antioxidant capacity and immune capacity of rainbow trout under heat stress.Compared with 10 mg/kg nano-selenium,the antioxidant effect and immune effect of 5 mg/kg nano-selenium are more stable.

Key words: Rainbow trout, Nano-selenium, Heat stress, Antioxidant index, Immune index

Cite this article

LU Junhao, LI Lanlan, QUAN Jinqiang, ZHAO Guiyan, SUN Jun, LIN Qiaorong, LIU Zhe. Effects of Nano-selenium on Serum Antioxidant and Immune Indexes of Oncorhynchus mykiss under Heat Stress[J]. Acta Agriculturae Boreali-Sinica, 2022, 37(3): 231-238. doi: 10.7668/hbnxb.20192837.

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