Originally Posted by Salmo Nella
3) if the fish are really less active on weekends I would think that it is simply the presence of more people disturbing their environment, whether they are fishing or just kayaking etc.
I appreciate the thoughts thus far. The seven day cycle may be out there and, as you pointed out Salmo, any change in feeding behavior may be due to increased pressure disturbing the feeding environment/conditions. In a way this may still represent a learned response in fish. Namely, more selective feeding.
As Royal points out, on some waters fish often hold very close to where people are standing . . . and are often the most difficult to catch. (Side note: I understand this very situation is what has lead to conditioned fisherfolks on the San Juan performing the "San Juan Shuffle." Not favorably looked upon by NM Game & Fish)