Evaluation of the Importance of Predator and Prey Field and Ocean Circulation on Atlantic Salmon Growth and Survival in the Gulf of Maine

Jason Stockwell, Gulf of Maine Research Institute

Atlantic salmon populations have declined precipitously, prompting their listing as an
endangered species. Recent research suggests bottlenecks to population recovery are occurring
during the marine phase of their life cycle. This research will examine how the match or
mismatch of spawning runs of diadromous forage fishes, aggregations of other marine forage
fishes, and thermal/circulation patterns in the Gulf of Maine (GoM) with the timing of Atlantic
salmon out-migration may influence Atlantic salmon population dynamics. Modeling will be
used to develop spatially- and temporally-explicit fields of predation risk, growth potential,
predation buffers, and hydrography to evaluate their relative importance (singularly and
interacting) for post-smolt growth and survival.