Have any of the GSF been large enough to eat a crayfish? Might need to look down the mouth of the largest couple of GSF and see if there are any crayfish feelers sticking up from the gullet. You might be catching a few small crayfish?
I never caught any catfish in my creek traps for most of the year despite seeing a ball of CC in my deepest pool that held a wide variety of fish. Then late in the fall I caught 4 yellow bullheads in the trap with nothing else.
I would not have thought trapping in my creek was "seasonal" dependent, but I did observe a large variance. (However, my "sample size" was small.)
