The recent large-scale hydropower development in the Amazon basin has raised concerns about the impacts on the movements of migratory fishes such as goliath catfish (Brachyplatystoma spp.). In the Madeira River, the efficiency of a 1400-m long fishway in the Santo Antônio hydropower plant (SAE HPP) was evaluated between 2012 and 2016 using telemetry techniques. Tagged fish (N = 388) were released 2000 m downstream of the dam and near the entrance or inside the fishway (N = 149). Fixed radio stations monitored fish movements and residence near 14 different structures of the SAE HPP; four acoustic receivers in the reservoir and one downstream the dam monitored whether fish moved away or past the dam. The findings revealed that 15% of the fish released downstream were detected near the dam but none were detected in the reservoir upstream. For the group of fish released in the fishway, no B. rousseauxii (N = 64) was detected moving upstream and into the reservoir and 5 individuals of B. vaillantii (N = 41) exited the fishway to the reservoir. This was the first long-term telemetry monitoring of fish movements near a dam in the Amazon and the results provided evidence of inefficiency of the fishway for the target species, which led the hydropower company to reconstruct the fishway.

亚马逊河流域最近的大规模水电开发引起了人们对迁徙鱼类如巨cat鱼（Brachyplatystoma spp。）的影响的担忧。在马德拉河上，2012年至2016年之间使用遥测技术评估了圣安东尼奥水电站（SAE HPP）一条1400米长的鱼道的效率。带标签的鱼（N  = 388）在大坝下游，入口附近或鱼道内2000 m处释放（N = 149）。固定广播电台监测了SAE HPP 14个不同结构附近的鱼类运动和栖息地；水库中有四个声波接收器，大坝下游有一个声波接收器，监测鱼是移走还是越过大坝。调查结果表明，下游释放的鱼中有15％在大坝附近被发现，而上游水库中没有被发现。对于在鱼道中释放的那组鱼，未 检测到鲁氏梭状芽胞杆菌（N = 64）向上游移动并进入水库，还有5个个体（B. vaillantii（N = 41）离开鱼道到达水库。这是首次对亚马逊水坝附近鱼类运动进行长期遥测监测，结果提供了针对目标物种的鱼道效率低下的证据，这导致水电公司重建了鱼道。