A new self-charging tracking tag will allow scientists to study the movements of fish throughout their entire lives. The tag, developed by scientists at the Pacific Northwest National Laboratory, uses a flexible strip containing piezoelectric materials, which generate electricity through physical movement. The tags emit beeps that are recorded by underwater receivers and are designed to track many different species offish, including long-living fish such as sturgeon and migratory species such as eel. The tag is designed to work as long as the fish carrying it swims.
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