I say Banannas to the whole theory. Although when I worked on a commercial troller in SE Alaska, you could not mention barn animals, leave a bucket with H2O in it upright, whistle (you might whistle up a storm). The only soap allowed on board was lemon sented Joy liquid soap. These were common "superstitions" on almost all the boats in the SE fleet.
Last week about half way through the drift we only had one fish to the net--and then I ate a bananna. You guessed it, we hooked another 8 fish during the last half of the float. Pass the bananna bread, please.