Distribution and movement of Chinese sturgeon, Acipenser sinensis, on the spawning ground located below the Gezhouba Dam during spawning seasons

文献类型： 外文期刊

第一作者： Yang, D.

作者： Yang, D.;Kynard, B.;Wei, Q.;Chen, X.;Zheng, W.;Du, H.

作者机构：

期刊名称：JOURNAL OF APPLIED ICHTHYOLOGY （ 影响因子：0.892； 五年影响因子：0.956 ）

ISSN： 0175-8659

年卷期： 2006 年 22 卷

页码：

收录情况： SCI

摘要： Sonic tracking of 40 adult pre-spawning Chinese sturgeons ( 35 females, 5 males) was done during 8 spawning seasons ( 1996 2004). Fish spent most of the time close to the dam ( within 7 km). A yearly mean of 64% of the tracking locations of pre-spawners were in the small area of 1.08 km distance below the dam ( cell I-B of the tracking grid system). These movements indicate fish continue to attempt to move farther upstream to pass the dam. Adults did not visit areas without major water spills or flow, i.e., the boat canal ( the Sanjiang River), the spill gates, and 1# ship lock. Adults were not tracked in the fast current tail waters of the Erjiang power plant and rarely in the Yichang port, although their occurrence ranged from 4 km to 10 km downstream of the dam while also occuring in the channel. Pre-spawning Chinese sturgeon use the Yichang reach in a non-random manner while seeking certain habitats and avoiding others. Adults arrived on the "spawning ground" one day before spawning. Adults move quickly about the spawning ground. After spawning, females quickly moved downstream, whereas males remained for 12-21 days. During a spawning season, females moved less than males.

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