Salmon Research Department, Fisheries Resources Institute, Japan Fisheries Research and Education Agency, Sapporo, Japan.
Obama Field station, Fisheries Technology Institute, Japan Fisheries Research and Education Agency, Obama, Japan.
J Fish Biol. 2020 Nov;97(5):1560-1563. doi: 10.1111/jfb.14486. Epub 2020 Sep 16.
We released five adult masu salmon (Oncorhynchus masou) tagged with external transmitters to track their ascending behaviour. The signals of all specimens were recorded in the upper area of the river system. Two patterns of ascending behaviour were recognized: ascending upward immediately after release and ascending during increased river discharge. The fastest ascending speed was about 1000 m h . Active movements were detected at night. The signal recording duration at each receiver for each fish was generally brief. Most fish did not stay at the pools where the receivers were installed.
我们释放了五尾带有外部发射器的成年马苏大麻哈鱼（Oncorhynchus masou），以追踪它们的洄游行为。所有样本的信号都在河流系统的上游区域被记录下来。我们识别出两种洄游行为模式：释放后立即向上游洄游和在河水流量增加时洄游。最快的洄游速度约为 1000 米/小时。夜间可以检测到主动游动。每条鱼在每个接收器上的信号记录持续时间通常很短。大多数鱼不会停留在安装接收器的水池中。
