I am certain that the farm I worked on for a couple years in the early to mid '80's had unsuccessfully tried Triploid Chinook. In saying this, they were penned and crowded until harvest. I also don't know if the water conditions were the best either, due to area pulp contaminants and brackish water for long periods of the year. The tidal flow was ok. This farm closed long before Atlantic salmon were ever used in the area.