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Funny up here where I fish we usually do better when the barometer is dropping.
I wonder if it's change in pressure then that triggers feeding? A change in pressure usually means a weather change, maybe they have it built into them to feed when they feel a change in pressure. To sort of stock up on food before the weather hits? If that is the case I wonder what the sort of magic number is e.g. so many millibars per hour etc. and if it's different for each species or if it triggers a feeding response at roughly the same change rate for all species? I also wonder if there are any studies out there done by reputable research places that might have this data available. I will check around and see if any of the wildlife programs at any of the public universities have done any studies. If they have it should be publicly available so I wouldn't have to pay for a copy of the study.
I have always noticed fish bite more on a rising barometer. I think fish activity increases at the beginning of a pressure drop, before the storm hits, then ceases until the pressure rises again. Like Neptune said, I don't think this applies to every situation and species. One thing I have learned about fishing is not to abide by any hard steadfast rules. I fished Nelson on Sunday and once again caught one single pike. This is how my season is shaping up so far: one single northern, every day.