I haven't taken the time to read the study, but I wonder if calories expended chasing the food comes into effect? Crayfish aren't fast, and don't take a lot of energy to catch, where I suspect fish are chased and missed more often.
Esshup that's a good question!! I bet you got to be right. How many times does that LMB miss that fast 4 inch BG v.s. a crayfish. I bet you a bunch... Or how many times has that bass looked at both and said meh this crayfish is easier to catch it's right here.... lol
RC