Abstract:Sonic tracking of 40 adult pre-spawning Chinese sturgeons (35females, 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-Bof 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.

附件下載：D.Yang, B.Kynard, Q.Wei, et al. Distribution and movement of Chinese sturgeon, Acipenser sinensis, on the spawning ground located below the Gezhouba Dam during spawning seasons. J.Appl.ichthyol. 2006, 22(Suppl.1): 145-151.pdf