Lethal Effect of Total Dissolved Gas-Supersaturated Water with Suspended Sediment on River Sturgeon (Acipenser dabryanus)
文献类型： 外文期刊
作者： Liu, Xiaoqing 1 ; Li, Na 1 ; Feng, Cuixia 1 ; Fu, Chenghua 1 ; Gong, Quan 2 ; Lai, Jiansheng 2 ; Jiang, Zhu 1 ; Yang, Yao 1 ;
作者机构： 1.Xihua Univ, Sch Energy & Power Engn, Key Lab Fluid & Power Machinery, Minist Educ, Chengdu 610039, Sichuan, Peoples R China
2.Sichuan Acad Agr Sci, Inst Fisheries, Chengdu 611731, Sichuan, Peoples R China
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2019 年 9 卷
页码：
收录情况： SCI
摘要： High total dissolved gas (TDG) levels and excessive suspended sediment (SS) concentrations pose serious threats to fish survival during flood season. However, little information is available on the effects of TDG supersaturation with varying SS concentrations on fish. In this study, laboratory experiments were performed to investigate the effects of TDG supersaturation with varying SS concentrations on five-month-old river sturgeons (Acipenser dabryanus). The test fish were exposed to combinations of SS concentrations (0, 200, 600 and 1,000 mg/L) and TDG levels (125, 130, 135 and 140%), and their mortality and median lethal time (LT50) were quantified. The fish showed abnormal behaviors (e.g., quick breathing, fast swimming and an agitated escape response) and symptoms of gas bubble disease (GBD). SS increased the mortality of river sturgeon exposed to TDG supersaturation. Furthermore, the LT50 values at 125%TDG were 4.47, 3.11, 3.07 and 2.68 h for the different SS concentrations (0, 200, 600 and 1,000 mg/L, respectively), representing a significant decrease in LT50 with increasing SS. However, at higher TDG levels (130-140%), there was no significant increase in LT50 with increasing SS. Therefore, river sturgeon showed weak tolerance ofTDG-supersaturated water with SS.
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