Network listens for passing salmon
Vallee and his team are here to maintain an array of hydrophones used to track migrating native fish. The work is part of a multi-agency effort to provide more timely and detailed information about the movements of salmon, steelhead, and sturgeon in the Central Valley. Deploying hundreds of listening stations across the watershed, the program lets scientists follow thousands of tagged fish as they navigate from hatcheries and headwater streams toward the Pacific Ocean.