Effects of acute hypoxia stress on blood biochemical indices of Carassius crassius
1Key Laboratory of Healthy Aquaculture of Sichuan Province, Chengdu 610041, Sichuan China;
2 Animal Health Research Institute, Tongwei Co., Ltd. Chengdu 610041, Sichuan China）
Abstract：As an important stress source, hypoxia can affect the survival rate of aquatic animals during transportation. The aim of this study was to simulate and investigate the effects of acute hypoxic stress on blood biochemical indices of juvenile Carassius crassius. Carassius crassius were exposed to acute hypoxia for 24 hours at a dissolved oxygen level of (0.61±0.23) mg/L. The measured indicators include blood hemoglobin (Hb), methemoglobin (MetHb), serum cortisol (COR), glucose (GLU), heat shock protein 70 (Hsp70) content and superoxide dismutase (SOD) activity following 0, 3, 6, 12 and 24 h acute hypoxia stress. The results showed that in the process of hypoxic stress, the Hb content first decreased and then increased. At 12 h, it was significantly lower than 0 h (P<0.05), and it returned to the pre-stress level at 24 h. The contents of MetHb, COR, GLU and Hsp70 all showed a change trend of first increasing and then decreasing, and the time points of reaching the peak content of different indices were slightly different. SOD activity increased with the extension of stress time, but the difference was not significant. Studies show that when the dissolved oxygen in water is lower than 0.6 mg/L, with the extension of acute hypoxia time, some important blood biochemical indicators of Carassius crassius change significantly, which also indicates that hypoxia stress has a great impact on the metabolic functions of Carassius crassius. Therefore, in order to improve the survival rate of Carassius crassius, adverse environmental conditions such as hypoxia should be avoided during their transportation.
王雪芹，阳涛 . 急性低氧应激对鲫鱼血液生化指标的影响[J]. 渔业现代化杂志, 2021, 48(6): 36-.
WANG Xueqin, YANG Tao. Effects of acute hypoxia stress on blood biochemical indices of Carassius crassius. , 2021, 48(6): 36-.
