It is a compelling picture that there were oscillations up until about the early 1990s, and something changed. We've looked at that in various fora with national scientists and we can point to that period in the late 1980s and early 1990s as almost like a regime shift. Something changed in the ocean. Something changed in the whole dynamic. After that time period, salmon never recovered.
You can see some comparative examples of that in looking at zooplankton. There are some indicators, when people look at zooplankton in the ocean in that same time period in the late 1980s and early 1990s, that there was a change in zooplankton variables as well. It seems that something changed in the ocean; something triggered it. Early 1990s was a cold period off eastern Canada. There was a very cold period of water. People felt that might have contributed to some declines in Atlantic cod as well. Something happened in the early 1990s. Conditions shifted back, but Atlantic salmon abundance did not shift back. You're right, there is a period that changed there, and we've seen it in other parameters that we've monitored in the ocean as well.