If I had to take an educated guess I would say fish move up and down stream on a daily basis depending on where the food is. I have fished creeks and streams a lot in my life and there are spots in them all that should hold fish that don't at certain times and places I catch fish that I don't think fish should be. I have also experienced streams that had an influx of otters that destroyed the fishing. Not a fish for a mile or so it seemed.