I know this seems like an odd question, but I heard a theory about the best fishing being during times of low Barometric pressure. (I've never noticed this effect myself.) The theory seems to be that fish can sense the lower pressure and that might bring them closer to the surface. Any shred of science to back up this rather silly sounding idea?
2006-09-14 15:45:43 · 5 answers · asked by nomercy 1 in Environment
I guess you could put some in a tank and see how they like it a different pressures. Like the other ppl said, although pressure in the water is dominated by the depth, the barometric pressure on the surface will have a minute effect.
It could be some intermediary thing like bugs go to the water more when the pressure is low.
You may be jumping to a hypothesis. Try introducing more observations maybe. Is the fishing definitely better when pressure is low? Is it actually rainy or getting ready to rain? If so, then what other conditions (dim sky, rain hitting water, less evaporation, cooler surface) could be exerting an influence as a coincidence?
2006-09-14 15:54:56 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Hmm. good question. Water is basically an incompresible liquid so something as small a force as a change in barometric pressure would probably not even be measureable underwater. I'm not sure why fish would WANT to come to the surface during low Barometric times. Animals are sensitive to things we're not but this sounds iffy.
However, it might be possible that the fish CAN detect something else that coincides with low barometric pressure (storms, magnetic feild changes, temperature drops,etc). Remember that correlation doesn't not equal causality. What they miight be sensing I don't know and I've never heard this but I don't fish (city boy)
2006-09-14 15:53:52 · answer #2 · answered by Scott L 5 · 0⤊ 0⤋
Well, technically they are correct, but water pressure is so high, it's like swatting a fly with a newspaper after it was run over by a tractor-trailer.
I suspect the fish biting with different barometric pressure might havev more to do with winds; water temps; currents; and lighting with or with clouds. Also, insects falling into the water? Rather than the pressure.
2006-09-14 15:55:38 · answer #3 · answered by retiredslashescaped1 5 · 0⤊ 0⤋
Yes. Under water pressure will vary as the surface pressure.
Theoretically a floating ship will increase the pressure under water by a minute amount
2006-09-14 15:48:57 · answer #4 · answered by Dr M 5 · 0⤊ 0⤋
YES
Pressure under water is mainly due to the weight of the water, HOWEVER, it is also due to the forces pressing down on the water as well - and the only thing doing that is air pressure.
2006-09-14 15:48:58 · answer #5 · answered by Anonymous · 0⤊ 0⤋