I had a request to post the bull trout redd survey data.  As you can see, there has not been a significant drop recently.  There is also hydroacoustic data that shows a continued steady population of bull trout in Lake Billy Chinook.  The big drop in 2006 is correlated with a drop in the kokanee population, the bull’s primary food source, after the bulls became too numerous to be supported by the ecosystem.  Note that the redd count has stayed fairly constant since then and at a level above pre-SWW levels.