Models 0, 1, and 2 do not use CPUE data or estimate CPUE. I've edited the figure caption to clarify this point. I could remove this figure entirely if you wish. The reason I included it was to highlight that CPUE cannot be estimated unless a parameter for migration is also included because of the apparent influx of fish over the season.
@ben-williams made the following comment:
Models 0, 1, and 2 do not use CPUE data or estimate CPUE. I've edited the figure caption to clarify this point. I could remove this figure entirely if you wish. The reason I included it was to highlight that CPUE cannot be estimated unless a parameter for migration is also included because of the apparent influx of fish over the season.