关键词: 总溶解气体过饱和, 气泡病, 耐受性, 回避性, 鱼类生存,

Abstract: Total dissolved gas(TDG) supersaturation often occurs at downstream of dams during the flood discharge. The high supersaturation level in the lower reach can cause serious threat to fish. The problems of TDG supersaturation caused by the discharged flood and its impact on fish have attracted more interests. In this study, gas bubble disease, tolerance and avoidance of fish were summarized based on the existing research results. The results showed that the tolerance threshold of fish had not been determined definitely. Solutions had not been recommended for the effect of TDG supersaturation on fish. It was suggested that a field experiment and investigation of interaction of TDG and environmental factors on fish should be carried out. Furthermore, interdisciplinary research is recommended to reveal the intrinsic mechanism of effect of TDG supersaturation on fish, which can contribute to the establishment of appropriate reservoir operation scheme and protective measures for fish.

Key words: total dissolved gas supersaturation, fish survival, gas bubble disease, tolerance, avoidance,