Abstract
We tracked fish behavior using radio telemetry in experimental streams, and analyzed it with a behavior prediction model to understand the relation between fish behavior and flood flow.The results are summarized as follows. 1. Upward migration began w ith flood discharge, however, there was a threshold in flow rate for the start of the migration. 2. Experimental results were simulated successfully by a model that is driven by hydraulic characteristics such as velocity and acceleration. 3.Thus, hydraulic characteristics which can influence fish behavior seemed to be current velocity and acceleration.Upward migration of fishes during flood seems able to be explained by combining our fish behavioral prediction model and hydraulic model.
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