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首页> 外文期刊>Zoological Science >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
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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

机译：水温和流量对中华the在长江中自然繁殖时间的影响及三峡水库蓄水的影响

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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.
机译：中国st鱼中华A是十月和十一月在中国长江中产卵的极危濒危鱼类。在这项研究中，我们分析了水温和流量等水文因素对中华st自然繁殖时间的影响，并根据1998年的调查数据评估了三峡水库蓄水的影响。到2011年。结果表明，第一产卵期与水温达到20℃（WT期为20℃），十月平均排放量（十月排放量）以及排放量变化显着相关（P <0.05）。从十月到十一月（十月至十一月三角洲排放）。回归分析表明，将WT的日期推迟20摄氏度，可以将第一个产卵日期推迟0.673天。十月份放电量增加1000 m（3）s（-1）可能会使第一产卵日期提前两天。我们的结果还表明，由于水温滞后和流量调节，TGR的蓄水推迟了第一产卵时间。为了保护中华st，我们建议采取以下生态法规：通过调节三峡大坝（TGD）下游的水温来消除水温滞后，在10月增加下游的排水量，并在10月之前完成蓄水。

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