Author(s): Han Liu
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Abstract: The conservation and improvement of fish habitat occupy a major place in ecological restoration. As an important carrier of river systems, fish are connected in the study of the relationship between flow regime, biota, and ecosystem processes. However, there were significant differences in fish behavior between natural and laboratory conditions. It is extremely important to conduct comprehensive studies on fish behavior under controlled conditions in terms of hydraulics, ecology, and physiology based on large test sites. The study is based on a large ecological test site in Sichuan, China, which has a natural river channel directly connected to the Dadu River. The flow rate of the river can be adjusted in real-time by changing the opening of the river inlet and outlet gates. The fish behavior is monitored using a radio frequency Identification system, with multiple monitoring sections (mainstream, left bank, and right bank) set up in the test section. When the test fish passes through the measurement section, the system can receive the unique signal from the PIT tag on the fish in real-time. Through the frequency and timing of tag signals collected between different river segments, the behavior trajectory of test fish in the turbid river can be inferred.
Year: 2022