New miniaturized acoustic fish tag is small enough to be injected by a syringe

Smaller tags are needed to eliminate tagging effects in fish survival studies. Now a new miniaturized acoustic tag is small enough to be injected by syringe. The injectable transmitter, engineered by Pacific Northwest National Laboratory, is just 15 mm in length, 3.35 mm in diameter, and weighs 0.216 g. The research team tested the new tag over a 500-km reach in the Columbia/Snake River using young Chinook salmon. Survival was significantly higher for fish injected with this tag compared to those fish with surgically implanted tags, and thus we can track smaller fish with less fear of impacting their survival or behavior. The research was coauthored by SAFS professor John Skalski and research consultant Richard Townsend and appears in the journal Scientific Reports.

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