Does anyone out there study the barometer in relation to how the fish are biting. What are your views on this ?

It has always been my experience with freshwater fish at least, the they don't bite during a dropping pressure, or generally low pressure.
One thought I had after observing some trout in an extremely deep hole, was that perhaps they go deeper, or move to deeper water, to make up for some of that drop?

Another thing, if it is about to rain, they will generally go off the bite, but then once the rain starts to fall, they will start biting.

Fish bite better in rising or higher pressure.The reason behind this is simple. All fish have airsacks in there stomaches, when the air pressure is low there air sacks expand making the fish feel full or bloated.

There is an old saying " bar at 1020 there will be fish a plenty"
When the wind blows east, the fish bite least, when the wind blows west the fish bite best!

Probably be better discussing prevailling wind conditions and strength, along with cloud cover, temperature, time of year(and its influence on insect larve on the surface), etc rather than making blanket assumptions based on barometer pressure.

One rule to go by is, concentrate on fishing shallow water during air pressure drops, deeper water during air pressure rises. Air pressure changes impact on the fishing more in the fall, winter and early to mid spring. This might be because fronts that pass during this time of year tend to come from the north and northwest, while late spring, summer and early fall frontal systems often come from the south and southwest. The colder weather fronts that come from the north and northwest involve more drastic barometric pressure changes, while the warmer weather fronts associated with coming from the south and southwest involve relatively mild pressure changes. While you forward to the day's fishing when it's as clear as the proverbial bell, not a cloud in the sky, you're not likely to encounter great fishing because the barometric pressure readings are probably very high. That reasoning is a lot more plausible than guessing that it's too bright and the bass have no eyelids, and this is the reason for them being off the "bite".

This is just a few things I have studied lately and was wondering what you guys can add.