Barometric Pressure.....

I think barometric pressure definitely affects fishing, but not because of the pressure changes. Barometric pressure changes produce changes in wind direction and speed and it is these changes that effect the fishing. Some folks have argued that fish sense the pressure change through their air bladder. The change in pressure from the surface to 30 feet creates a doubling in the pressure (2 Atmospheres). The change in barometric pressure associated with storms, would represent the fish swimming up or down a few inches in the water column. Both fish with swim bladders and those without (most shark species) are affected by the changes associated with barometric pressure shifts. An example is that prior to a front coming through in the fall, the wind will generally switch SE. SE is a very favorable wind because it tends to be a mild wind, and keeps the inshore waters clean and calm. Both of these conditions cause bait to move inshore which brings the stripers with them. The attendant water clarity also makes good hunting for visual ambush predators like stripers. This is one example of how wind shifts associated with barometric changes can make for a good day fishing. Many more examples of good and bad affects of barometric swings exist, but as I mentioned, I believe it is the wind changes that produce most of the effects and applies to both fresh and salt water.