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Impact of the Three Gorges Dam on the spawning stock and natural reproduction of Chinese sturgeon in the Changjiang River, China
Gao Xin1; Lin Pengcheng1; Li Mingzheng1; Duan Zhonghua1; Liu Huanzhang1
2016
Source PublicationCHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN0254-4059
Volume34Issue:5Pages:894
AbstractChinese sturgeon (Acipenser sinensis) is the flagship species of the Changjiang River. The migration route of this species is blocked by the first dam, the Gezhou Dam, and its reproduction is affected by the Three Gorges Dam (TGD), one of the largest dams in the world. We studied the impact of the impoundment of the Three Gorges Reservoir (TGR) since 2003 on the spawning stock and the natural reproduction of the Chinese sturgeon by using our monitoring data from 1997 to 2013. Results indicate that TGR impoundment has delayed the first spawning dates of the fish from middle-late October to late November, decreased the amount of spawning activities from twice to only once each year, and significantly reduced egg production. In particular, the fish did not demonstrate any spawning activities in 2013. Therefore, TGR impoundment significantly affects the natural reproduction of the fish downstream of the TGD. The spawning stock size of the fish is also predicted to further decrease in the future, which will lead to a risk of population extinction. Ecological regulations must be imposed on decreasing the water temperature to 20 degrees C before mid-October and increasing water discharge downstream of the TGD in October to induce spawning of the Chinese sturgeon.
KeywordYANGTZE-RIVER ACIPENSER-SINENSIS BEDFORM MORPHOLOGY GEZHOUBA DAM HABITAT SUITABILITY PERSPECTIVE RESERVOIR AREA LAKE Chinese sturgeon Three Gorges Dam spawning activity spawning stock conservation
Language英语
Funding Project[Three Gorges Project Eco-Environmental Monitoring System] ; [National Natural Science Foundation of China] ; [China Three Gorges Corporation]
Document Type期刊论文
Identifierhttp://ir.ihb.ac.cn/handle/342005/40481
Collection水生生物多样性与资源保护研究中心_期刊论文
Affiliation1.中国科学院
2.中国科学院水生生物研究所
Recommended Citation
GB/T 7714
Gao Xin,Lin Pengcheng,Li Mingzheng,et al. Impact of the Three Gorges Dam on the spawning stock and natural reproduction of Chinese sturgeon in the Changjiang River, China[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2016,34(5):894.
APA Gao Xin,Lin Pengcheng,Li Mingzheng,Duan Zhonghua,&Liu Huanzhang.(2016).Impact of the Three Gorges Dam on the spawning stock and natural reproduction of Chinese sturgeon in the Changjiang River, China.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,34(5),894.
MLA Gao Xin,et al."Impact of the Three Gorges Dam on the spawning stock and natural reproduction of Chinese sturgeon in the Changjiang River, China".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 34.5(2016):894.
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