Movements of Prespawn Adult Atlantic Salmon Near Hydroelectric Dams in the Lower Penobscot River, Maine

摘要: Abstract Acoustic telemetry was used to assess riverine behavior and passage success for prespawn male adult Atlantic salmon Salmo salar in the lower Penobscot River, Maine, 2005 (n = 10) 2006 25). Only 3 of 10 (30%) 2 25 (8%) tagged successfully passed all three dams between head tide presumed spawning habitat 2006, respectively. Migrants that failed pass second upstream dam frequently fell back into estuary (3 4 2005; 17 23 2006), few reascended Veazie Dam at tide. Fallback associated with temperatures exceeding 22°C may reflect a strategy coping thermal stress migratory delays. were also observed actively seek out refuge near one dams. Passage data compared results from previous studies Carlin tags radio 1987–1990 1992, passive integrated transponder 2002–2004. For ...