An in-situ study in the Xijiang River basin revealed adverse effects of total dissolved gas supersaturation on fish
High dam discharge can lead to total dissolved gas (TDG) supersaturation in downstream rivers, causing fish to suffer from bubble trauma and even mortality. Focusing on the Datengxia hydropower station in the Xijiang River basin, we conducted in-situ experiments to explore the tolerance patterns of...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-01-01
|
| Series: | Ecotoxicology and Environmental Safety |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651324017391 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832590958306263040 |
|---|---|
| author | Xuefeng Chen Zhiguang Zhang Yunong Qin Shikang Liu Yuanming Wang Jingjie Feng Kefeng Li |
| author_facet | Xuefeng Chen Zhiguang Zhang Yunong Qin Shikang Liu Yuanming Wang Jingjie Feng Kefeng Li |
| author_sort | Xuefeng Chen |
| collection | DOAJ |
| description | High dam discharge can lead to total dissolved gas (TDG) supersaturation in downstream rivers, causing fish to suffer from bubble trauma and even mortality. Focusing on the Datengxia hydropower station in the Xijiang River basin, we conducted in-situ experiments to explore the tolerance patterns of economic fish species, including Ctenopharyngodon idella, Hypophthalmichthys molitrix, and Cirrhinus molitorella, under the influence of TDG supersaturation at different compensation depths. Moreover, the development and recovery patterns of bubble trauma and the swimming ability of fish exposed to TDG supersaturated water were investigated. In-situ experiments showed that TDG supersaturation ranged from 112.2 % to 125.2 %, averaging 118.3 % at the experiment site. The results revealed that compensation depth is favorable in fish avoidance of TDG supersaturation. The survival rate of the experimental fish at the surface was lower than for those at the 0–3 m water depth. The survival rates of Ctenopharyngodon idella, Hypophthalmichthys molitrix, and Cirrhinus molitorella at the surface were only 30 %, 47.5 %, and 70 %, respectively, while at the 0–3 m water depth, the survival rates were 97.5 %, 87.5 %, and 87.5 %, respectively. Additionally, the survival rate of fish was related to their preferred water depth. The bubble trauma scores of the experimental fish in TDG supersaturated water significantly increased with exposure time and significantly decreased after recovery in freshwater. The relative and absolute critical swimming speed (Ucrit) of Ctenopharyngodon idella ranged from 10.91 to 12.98 BL/s and 83.3–102.9 cm/s respectively, and there were no significant changes in the Ucrit with increasing TDG supersaturation exposure. |
| format | Article |
| id | doaj-art-6429276087934dbdbdb1abbaa7f63b05 |
| institution | Kabale University |
| issn | 0147-6513 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj-art-6429276087934dbdbdb1abbaa7f63b052025-01-23T05:26:01ZengElsevierEcotoxicology and Environmental Safety0147-65132025-01-01289117663An in-situ study in the Xijiang River basin revealed adverse effects of total dissolved gas supersaturation on fishXuefeng Chen0Zhiguang Zhang1Yunong Qin2Shikang Liu3Yuanming Wang4Jingjie Feng5Kefeng Li6State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, ChinaBeijing Engineering Corporation Limited, Power Construction Corporation of China, Beijing 100024, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China; Corresponding author.State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, ChinaState Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, ChinaHigh dam discharge can lead to total dissolved gas (TDG) supersaturation in downstream rivers, causing fish to suffer from bubble trauma and even mortality. Focusing on the Datengxia hydropower station in the Xijiang River basin, we conducted in-situ experiments to explore the tolerance patterns of economic fish species, including Ctenopharyngodon idella, Hypophthalmichthys molitrix, and Cirrhinus molitorella, under the influence of TDG supersaturation at different compensation depths. Moreover, the development and recovery patterns of bubble trauma and the swimming ability of fish exposed to TDG supersaturated water were investigated. In-situ experiments showed that TDG supersaturation ranged from 112.2 % to 125.2 %, averaging 118.3 % at the experiment site. The results revealed that compensation depth is favorable in fish avoidance of TDG supersaturation. The survival rate of the experimental fish at the surface was lower than for those at the 0–3 m water depth. The survival rates of Ctenopharyngodon idella, Hypophthalmichthys molitrix, and Cirrhinus molitorella at the surface were only 30 %, 47.5 %, and 70 %, respectively, while at the 0–3 m water depth, the survival rates were 97.5 %, 87.5 %, and 87.5 %, respectively. Additionally, the survival rate of fish was related to their preferred water depth. The bubble trauma scores of the experimental fish in TDG supersaturated water significantly increased with exposure time and significantly decreased after recovery in freshwater. The relative and absolute critical swimming speed (Ucrit) of Ctenopharyngodon idella ranged from 10.91 to 12.98 BL/s and 83.3–102.9 cm/s respectively, and there were no significant changes in the Ucrit with increasing TDG supersaturation exposure.http://www.sciencedirect.com/science/article/pii/S0147651324017391Total dissolved gas supersaturationGas bubble traumaSwimming abilitySurvival rateCompensation depth |
| spellingShingle | Xuefeng Chen Zhiguang Zhang Yunong Qin Shikang Liu Yuanming Wang Jingjie Feng Kefeng Li An in-situ study in the Xijiang River basin revealed adverse effects of total dissolved gas supersaturation on fish Ecotoxicology and Environmental Safety Total dissolved gas supersaturation Gas bubble trauma Swimming ability Survival rate Compensation depth |
| title | An in-situ study in the Xijiang River basin revealed adverse effects of total dissolved gas supersaturation on fish |
| title_full | An in-situ study in the Xijiang River basin revealed adverse effects of total dissolved gas supersaturation on fish |
| title_fullStr | An in-situ study in the Xijiang River basin revealed adverse effects of total dissolved gas supersaturation on fish |
| title_full_unstemmed | An in-situ study in the Xijiang River basin revealed adverse effects of total dissolved gas supersaturation on fish |
| title_short | An in-situ study in the Xijiang River basin revealed adverse effects of total dissolved gas supersaturation on fish |
| title_sort | in situ study in the xijiang river basin revealed adverse effects of total dissolved gas supersaturation on fish |
| topic | Total dissolved gas supersaturation Gas bubble trauma Swimming ability Survival rate Compensation depth |
| url | http://www.sciencedirect.com/science/article/pii/S0147651324017391 |
| work_keys_str_mv | AT xuefengchen aninsitustudyinthexijiangriverbasinrevealedadverseeffectsoftotaldissolvedgassupersaturationonfish AT zhiguangzhang aninsitustudyinthexijiangriverbasinrevealedadverseeffectsoftotaldissolvedgassupersaturationonfish AT yunongqin aninsitustudyinthexijiangriverbasinrevealedadverseeffectsoftotaldissolvedgassupersaturationonfish AT shikangliu aninsitustudyinthexijiangriverbasinrevealedadverseeffectsoftotaldissolvedgassupersaturationonfish AT yuanmingwang aninsitustudyinthexijiangriverbasinrevealedadverseeffectsoftotaldissolvedgassupersaturationonfish AT jingjiefeng aninsitustudyinthexijiangriverbasinrevealedadverseeffectsoftotaldissolvedgassupersaturationonfish AT kefengli aninsitustudyinthexijiangriverbasinrevealedadverseeffectsoftotaldissolvedgassupersaturationonfish AT xuefengchen insitustudyinthexijiangriverbasinrevealedadverseeffectsoftotaldissolvedgassupersaturationonfish AT zhiguangzhang insitustudyinthexijiangriverbasinrevealedadverseeffectsoftotaldissolvedgassupersaturationonfish AT yunongqin insitustudyinthexijiangriverbasinrevealedadverseeffectsoftotaldissolvedgassupersaturationonfish AT shikangliu insitustudyinthexijiangriverbasinrevealedadverseeffectsoftotaldissolvedgassupersaturationonfish AT yuanmingwang insitustudyinthexijiangriverbasinrevealedadverseeffectsoftotaldissolvedgassupersaturationonfish AT jingjiefeng insitustudyinthexijiangriverbasinrevealedadverseeffectsoftotaldissolvedgassupersaturationonfish AT kefengli insitustudyinthexijiangriverbasinrevealedadverseeffectsoftotaldissolvedgassupersaturationonfish |