Abstract
Acoustic telemetry has been used extensively to study the behavior of aquatic animals. The Juvenile Salmon Acoustic Telemetry System (JSATS) is one such system; it was developed for studying juvenile salmonids but has been used to study numerous species. A recent innovation of the JSATS system is an acoustic transmitter that is small enough to be implanted through injection or small incision that doesn’t require sutures. Use of the JSATS system involves deploying cabled acoustic receivers at hydroelectric dams, or other structures, and autonomous acoustic receivers in free-flowing sections of a river. The raw detections from acoustic-tagged fish are processed to remove potential false positives. The clean detections (5,147,996 total) are used to generate detection events and to compute 3-D trajectories (403,900 total), which are used to assign fish to a passage route through a dam. Controlled field testing involving a high-accuracy Global Positioning System receiver is done to validate the submeter accuracy of the trajectories. The JSATS dataset could be reused for expanding the understanding of near-dam fish behavior.
Highlights
Background & SummaryTelemetry is often used to understand the effects of hydropower structures on fish species of concern
Juvenile Salmon Acoustic Telemetry System (JSATS) was initially developed for the U.S Army Corps of Engineers (USACE) to evaluate the behavior and survival of juvenile salmonids migrating past dams, through reservoirs, and along the lower Columbia River estuary to ocean entry[1,2,3]
In addition to the cabled receiver arrays, several JSATS autonomous receiver arrays were deployed throughout the Snake (Fig. 1a) and Columbia rivers (Table 1) to estimate the cumulative mortality of the juvenile Chinook salmon as they migrate toward the Pacific Ocean
Summary
Telemetry is often used to understand the effects of hydropower structures on fish species of concern. To evaluate the downsized JSATS injectable transmitter, a field study[11] was conducted in which 682 subyearling Chinook salmon were tagged with the injectable acoustic transmitter and released upstream of Little Goose Dam (LGS) on the Snake River in Washington State, USA (Fig. 1a). In addition to the cabled receiver arrays, several JSATS autonomous receiver arrays were deployed throughout the Snake (Fig. 1a) and Columbia rivers (Table 1) to estimate the cumulative mortality of the juvenile Chinook salmon as they migrate toward the Pacific Ocean. Controlled field testing, involving the use of a high accuracy Global Positioning System (GPS) receiver, was used to validate the accuracy of the 3-D trajectories This dataset represents a relatively large sample set of subyearling Chinook salmon that were tagged with the downsized acoustic transmitter and subsequently released and detected at multiple locations on their journey to the Pacific Ocean. The dataset presented in this manuscript could be used in the future to deepen understanding of near-dam behavior and migration timing of subyearling Chinook salmon
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