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题名: Effects of Water Temperature and Discharge on Natural Reproduction Time of the Chinese Sturgeon, Acipenser sinensis, in the Yangtze River, China and Impacts of the Impoundmentof the Three Gorges Reservoir
作者: Gao, Xin1; Lin, Pengcheng1; Li, Mingzheng1; Duan, Zhonghua1; Liu, Huanzhang1
通讯作者: Liu, HZ (reprint author), Chinese Acad Sci, Inst Hydrobiol, Key Lab Aquat Biodivers & Conservat, 7th Southern Rd East Lake, Wuhan 430072, Hubei Province, Peoples R China.
关键词: critically endangered fish ; spawning time ; water temperature ; discharge ; flow regulation
刊名: ZOOLOGICAL SCIENCE
发表日期: 2014-05-01
DOI: 10.2108/zs130123
卷: 31, 期:5, 页:274-278
收录类别: SCI
文章类型: Article
部门归属: [Gao, Xin; Lin, Pengcheng; Li, Mingzheng; Duan, Zhonghua; Liu, Huanzhang] Chinese Acad Sci, Inst Hydrobiol, Key Lab Aquat Biodivers & Conservat, Wuhan 430072, Hubei Province, Peoples R China
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
资助者: Three Gorges Project eco-environmental monitoring system [JJ [2013]-010]; National Natural Science foundation of China [NSFC 31201727]; China Three Gorges Corporation [0799522]
类目[WOS]: Zoology
研究领域[WOS]: Zoology
摘要: Chinese sturgeon, Acipenser sinensis, is a critically endangered anadromous fish species spawning in the Yangtze River of China during October and November. In this study, we analyzed the effects of hydrological factors, such as water temperature and discharge, on the natural reproduction time of the Chinese sturgeon and evaluated the impact of the impoundment of the Three Gorges Reservoir (TGR) based on our survey data from 1998 to 2011. The results showed that the first spawning dates were significantly (P < 0.05) correlated with the date of water temperature reaching 20 degrees C (20 degrees C WT dates), October mean discharge (Oct. discharge), and the discharge change from October to November (Oct-Nov Delta discharge). Regression analysis suggested that one-day delay of 20 degrees C WT dates could postpone the first spawning date by 0.673 days. A discharge increase of 1000 m(3)s(-1) in October could bring forward the first spawning date by two days. Our results also indicated that the impoundment of the TGR had delayed the first spawning time due to water temperature lag and flow regulation. We suggest the following ecological regulations in order to facilitate conservation of the Chinese sturgeon: to eliminate water temperature lag by regulating water temperature downstream of the Three Gorges Dam (TGD), to enhance water discharge downstream in October, and to complete impoundment before October.
英文摘要: Chinese sturgeon, Acipenser sinensis, is a critically endangered anadromous fish species spawning in the Yangtze River of China during October and November. In this study, we analyzed the effects of hydrological factors, such as water temperature and discharge, on the natural reproduction time of the Chinese sturgeon and evaluated the impact of the impoundment of the Three Gorges Reservoir (TGR) based on our survey data from 1998 to 2011. The results showed that the first spawning dates were significantly (P < 0.05) correlated with the date of water temperature reaching 20 degrees C (20 degrees C WT dates), October mean discharge (Oct. discharge), and the discharge change from October to November (Oct-Nov Delta discharge). Regression analysis suggested that one-day delay of 20 degrees C WT dates could postpone the first spawning date by 0.673 days. A discharge increase of 1000 m(3)s(-1) in October could bring forward the first spawning date by two days. Our results also indicated that the impoundment of the TGR had delayed the first spawning time due to water temperature lag and flow regulation. We suggest the following ecological regulations in order to facilitate conservation of the Chinese sturgeon: to eliminate water temperature lag by regulating water temperature downstream of the Three Gorges Dam (TGD), to enhance water discharge downstream in October, and to complete impoundment before October.
语种: 英语
WOS记录号: WOS:000335339700002
ISSN号: 0289-0003
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/19993
Appears in Collections:水生生物多样性与资源保护研究中心_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Hydrobiol, Key Lab Aquat Biodivers & Conservat, Wuhan 430072, Hubei Province, Peoples R China
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