Fulton River Upwelling Gravel Incubator for Sockeye Salmon

A styrofoam insulated upwelling gravel incubator employing a gravel substrate and partially filtered river water was tested under extreme cold weather conditions and evaluated as a technique for propagating sockeye (Oncorhynchus nerka) salmon at Fulton River, near Babine Lake, B.C. Criteria for evaluation were survival rates, emergence timing and fry quality relative to gravel composition, egg density and the soft versus water-hardened planting technique.