|The JSAT acoustic tags. Source: Lotek Wireless|
A lot of the research paper involves data crunching from all of the acoustic pings recorded. The authors were able to see differences between salmon species in terms of how quickly they headed into deep water. One trend was that the salmon of all species scattered along the north-south extent of the Columbia to a much greater extent than had been appreciated. This means that the counts of juveniles, which are important measurements of fisheries health, may be underestimated.