Yep ... and "bodily functions" include eating, plus the "fight/flight" response.
Fish aren't "dumb" ... just not as "intelligent" as we give them credit for.
Fish are born with "instincts" (like eat & survive, swim away from bigger critters) so saying they "learn/retain" anything or "remember" anything (over an extended period) is crediting them with a greater capacity than is likely plausible.
Food pellets are not a LIVE "natural food" ... but, hatchery raised fish are never given (live) "natural food". The food pellets are dried components of the fish's "natural food". If they weren't able to instinctively go to eating their "natural food", once released into the wild, they'd soon starve to death !!
And yes, I do maintain that footstep & feeder vibrations (& "food" splashing on the surface) can trigger a feeding response ... as long as it's maintained on a continuing basis. Turn the feeder off, or stop walking down to the pond and throwing food into the water ... and eventually they will "forget" the association and go back to their natural instinctive behavior of feeding.
I put quotation marks around the words forget & learn ... to associate the meaning of the words to humans, not the fish. They run on instinct (DNA programming, as you put it).
And as far as "irritating" a fish into biting a specific "bait" vs the sight/vibration pattern of that bait "triggering" a feeding reaction .... IMHO that's splitting hairs, or the "6 of one and half a dozen of the other" ideology. I don't know for sure, and doubt you do either
... cp
