Eric, GSF don't appear to learn either. Not sure why other than they like to dart and take prey with powerful attacks. I can tell just by the take whether a GSF is responsible. It is this devil may care approach of GSF that may be passed onto GSF hybrids. An interesting hypothesis anyway. BG often quickly approach and then give an offering a thorough lookover before sucking it in. The take is often without the fish moving forward. Many times after they have studied an offering they will only nibble and spit or altogether give it the stink eye.
Have you seen any papers on the issue of learning with regard to BG-RES hybrids? I would be interested to know if they are more vulnerable to hook and line than are BG and if they learn hook avoidance.
