Thank you so very much for making this video and covering all the bases, that is definitely the best explanation I’ve ever heard on this, and love the underwater explanation of location and baits to use, I totally agree with all this, while in Bass Pro I saw a fishing barometer that shows best fishing is highest barometer reading, which contradicts current lore of low barometer is best fishing, and tracking fish catches were all over the scale, thanks for putting at least for me this conversation to rest, I appreciate you delving into the depths of this very much!!!
@@markfisheroutdoorsanother thing that has intrigued me is the solunar tables, does fish feed better when moon is in certain stages, and eat better during major times and less during minor times, not as hungry rest of time, I believe full moon affect spawning (maybe as I’ve waited till full moon and found nothing but empty beds or small male guarders) and are these still used by today’s generation or do they know what there are, or are these myths that are made more for fishermen to buy like most colors of lures? Does cover play into the feeding time any?
Hydrostatic pressure (water pressure) is 0.433 PSI per foot of water. The difference in high and low barometric pressure (atmospheric pressure) ranges between .5 PSI and 1.5 PSI. The total combined pressure is called the "absolute hydrostatic pressure. According to a google AI search "fish can generally sense changes in absolute hydrostatic pressure due to barometric pressure changes, primarily through their swim bladder, which acts as a pressure-sensitive organ, causing them to adjust their behavior when the atmospheric pressure fluctuates; however, the extent of this effect varies depending on the fish species and the magnitude of the pressure change." Therefore, although water does not compress, the fish can still feel the difference when the barometric pressure changes, The question is, how does it affect their behavior and why?
I had a very similar conversation with the science teacher at my school regarding the information you presented regarding hydrostatic pressure. It still does not explain why a bass would “feel bad”, be lethargic, not eat during that period. I appreciate your input into this topic as well as you watching the video.
@@markfisheroutdoors A fish in deeper water is less affected by barometric pressure than a fish in shallower water. I believe light penetration is a factor, more so for shallow fish compared to deep(er) fish. Even if a liquid can't be compressed, fish do feel/react to the barometric pressure. Even land creatures are less active on a high compared to a low barometric pressure. Have you not noticed how you, yourself feel/react under different barometric pressures?
@glynnreid1217 I understand that hydrostatic pressure effects fish but the increased pressure should “in theory” reduce the size of the swim bladder and therefore make the fish more comfortable in high pressure situations. This does not match with our observations.
Great explanation Mark you hit the nail on the head. Liquids do not compress they have a specific gravity. As always my friend I enjoyed the video, take care and be safe.
Absolute air pressure slightly affects game fish, but affect how and where the plankton and zooplankton are in a given situation. Generally in high skies, the zooplankton will be found lower in the water column and thus the bass will be feeding "down". In low pressure, and clouds, the zooplankton rise in the water column and bass are more often feeding "up". This also affects how aggressively the bass bite. All about the groceries😂
Thanks man! I'm lowkey obsessed with topwater. I still throw it in winter when possible. I think I'll have an easier time finding those conditions now that I understand how pressure affects the feeding. Thanks!
In my experience the "hottest" bite is with a falling barometer just prior to a front. Once the pressure stabilizes after a front the fishing will pick up again
@@kenneth9874 which is probably explained by the hydrostatic pressure we’ve been talking about in the comments on this post. The may be able to feel the pressure change but it takes very little for them to adjust depth in order to compensate for the barometric pressure change. Thanks for commenting!
After fishing. Walleye bass up here in the Land 10,000 Lakes Low pressure moving in. Storms. Triggers feeding. But most the time. Low pressure is followed by high pressure. Which usually leads to water temperature falls. Sometimes pretty fast. I’ve seen to Many times. Fish go crazy most times before a storm. And I agree with one other person on this comments. During low pressure they’ve feed up Ohhh. After fishing over 50 years.
In my opinion, the fish aren't as hungry during a high-pressure system because they are already full from eating during the low-pressure system. Most fish are nighttime or low-light feeders so during those clear sunny days, it's more difficult because they are avoiding sunlight. Fish generally are very light-sensitive. For sure, a fish is an opportunist so a small snack without much effort is a tough pass for them.
Even though water doesn’t compress it’ll still experience pressure changes. Just like if you put water in a bottle and squeeze. The water won’t compress, but it’ll have a higher psi. the atmosphere over the entire lake pushing down from above it. If the pressures higher it’ll make the water psi higher. Probably so minimal that we can’t even feel it but the fish with their sensory organs can. Just my opinion though
Yes, the water doesn’t compress but increasing air pressure is affecting objects submerged- like fish. Simple law of physics. If you have a let say a cork suspended half way in the bottle with water and when you increase the pressure of air above the surface, the circulation will sink down. I have no clue about fishing but the fish definitely will feel changes in the air pressure.
After fishing. Walleye bass up here in the Land 10,000 Lakes Low pressure moving in. Storms. Triggers feeding. But most the time. Low pressure is followed by high pressure. Which usually leads to water temperature falls. Sometimes pretty fast. I’ve seen to Many times. Fish go crazy most times before a storm. And I agree with one other person on this comments. During low pressure they’ve feed up
Hey Mark, I agree with your overall conclusion about the weather conditions playing a much bigger role in fish activity than the barometric pressure. I studied mechanical engineering in college and took a few classes about fluid mechanics and I can tell you that the pressure that the fish are feeling does go up and down depending on the atmospheric air pressure. The pressure at a given depth in the lake is given by this formula: (water pressure) = (atmospheric air pressure) + (water density)x(gravity)x(height of water column). The part that always bothered me is that the difference between low and high barometric pressure (29 in*hg - 31 in*hg) is approximately 1 psi. To have an increase or decrease of 1 psi, you would have to move up or down 2.31 feet in the water column. So that means all the fish would have to do is swim up or down a couple of feet in the water column to completely negate the effects of the barometric pressure.
I know fishing is usually better in pre front conditions so I would assume the pressure is dropping at that point. This has always been a confusing topic for me.
Amen brother! I researched the heck out of this one and found most sources contradicted each other while none had answers that made sense. I appreciate you tuning into the channel!
@@markfisheroutdoors I read a report from some college study looking back over the years in BASS tournaments, 15 and more years ago, heavier weights were recorded in deeper water over shallow water on high pressure days. The weights were more consistent in deeper water than shallow. But under low pressure days, weights were larger in shallow water. On 4 day tournaments the weights basically even out over that time period with typical 4 day weather changes. The weather/weight swings were less in summer tournaments compared to winter tournaments.
Air pressure can not penetrate water so how do the fish feel it and react to it is the million dollar question underwater is it's own world I personally have exhausted all of the people I thought would have a answer to this and nobody really knows
I personally think it has more to do with light penetration and wind moving the particles in the water which get the bait moving and the bass follow and I believe bass feed at nite I've been nite fishing my hole life and caught way more and bigger fish at night
Thank you so very much for making this video and covering all the bases, that is definitely the best explanation I’ve ever heard on this, and love the underwater explanation of location and baits to use,
I totally agree with all this, while in Bass Pro I saw a fishing barometer that shows best fishing is highest barometer reading, which contradicts current lore of low barometer is best fishing, and tracking fish catches were all over the scale, thanks for putting at least for me this conversation to rest, I appreciate you delving into the depths of this very much!!!
@@mobasser my pleasure buddy. I appreciate your topic suggestions….
Keep em coming!
@@markfisheroutdoorsanother thing that has intrigued me is the solunar tables, does fish feed better when moon is in certain stages, and eat better during major times and less during minor times, not as hungry rest of time, I believe full moon affect spawning (maybe as I’ve waited till full moon and found nothing but empty beds or small male guarders) and are these still used by today’s generation or do they know what there are, or are these myths that are made more for fishermen to buy like most colors of lures?
Does cover play into the feeding time any?
Hydrostatic pressure (water pressure) is 0.433 PSI per foot of water. The difference in high and low barometric pressure (atmospheric pressure) ranges between .5 PSI and 1.5 PSI. The total combined pressure is called the "absolute hydrostatic pressure.
According to a google AI search "fish can generally sense changes in absolute hydrostatic pressure due to barometric pressure changes, primarily through their swim bladder, which acts as a pressure-sensitive organ, causing them to adjust their behavior when the atmospheric pressure fluctuates; however, the extent of this effect varies depending on the fish species and the magnitude of the pressure change."
Therefore, although water does not compress, the fish can still feel the difference when the barometric pressure changes,
The question is, how does it affect their behavior and why?
I had a very similar conversation with the science teacher at my school regarding the information you presented regarding hydrostatic pressure. It still does not explain why a bass would “feel bad”, be lethargic, not eat during that period. I appreciate your input into this topic as well as you watching the video.
@@markfisheroutdoors A fish in deeper water is less affected by barometric pressure than a fish in shallower water. I believe light penetration is a factor, more so for shallow fish compared to deep(er) fish. Even if a liquid can't be compressed, fish do feel/react to the barometric pressure. Even land creatures are less active on a high compared to a low barometric pressure. Have you not noticed how you, yourself feel/react under different barometric pressures?
@glynnreid1217 I understand that hydrostatic pressure effects fish but the increased pressure should “in theory” reduce the size of the swim bladder and therefore make the fish more comfortable in high pressure situations. This does not match with our observations.
Good points.
@@keithhankey2314 thank you
Low pressure weather equals good ambush conditions for predators, ie active bass feeding, have to agree
Good info! If we have storms moving in I'm usually heading to the water lol. Happy thanksgiving to you guys
Thanks buddy, happy Thanksgiving to you as well!
Good stuff. Pressure is a big deal for sure.
@@JimGLopez67 thanks
Interesting topic. I’ll be paying more attention to barometric pressure in the future for sure!
Great explanation Mark you hit the nail on the head. Liquids do not compress they have a specific gravity. As always my friend I enjoyed the video, take care and be safe.
Absolute air pressure slightly affects game fish, but affect how and where the plankton and zooplankton are in a given situation. Generally in high skies, the zooplankton will be found lower in the water column and thus the bass will be feeding "down". In low pressure, and clouds, the zooplankton rise in the water column and bass are more often feeding "up". This also affects how aggressively the bass bite. All about the groceries😂
Thanks man! I'm lowkey obsessed with topwater. I still throw it in winter when possible. I think I'll have an easier time finding those conditions now that I understand how pressure affects the feeding. Thanks!
In my experience the "hottest" bite is with a falling barometer just prior to a front. Once the pressure stabilizes after a front the fishing will pick up again
@@kenneth9874 which is probably explained by the hydrostatic pressure we’ve been talking about in the comments on this post. The may be able to feel the pressure change but it takes very little for them to adjust depth in order to compensate for the barometric pressure change. Thanks for commenting!
After fishing. Walleye bass up here in the Land 10,000 Lakes Low pressure moving in. Storms. Triggers feeding. But most the time. Low pressure is followed by high pressure. Which usually leads to water temperature falls. Sometimes pretty fast. I’ve seen to Many times. Fish go crazy most times before a storm. And I agree with one other person on this comments. During low pressure they’ve feed up Ohhh. After fishing over 50 years.
In my opinion, the fish aren't as hungry during a high-pressure system because they are already full from eating during the low-pressure system.
Most fish are nighttime or low-light feeders so during those clear sunny days, it's more difficult because they are avoiding sunlight. Fish generally are very light-sensitive.
For sure, a fish is an opportunist so a small snack without much effort is a tough pass for them.
Just remember, a bass (largemouth, smallmouth, spotted) are actually a member of the sun fish family.
Even though water doesn’t compress it’ll still experience pressure changes. Just like if you put water in a bottle and squeeze. The water won’t compress, but it’ll have a higher psi. the atmosphere over the entire lake pushing down from above it. If the pressures higher it’ll make the water psi higher. Probably so minimal that we can’t even feel it but the fish with their sensory organs can. Just my opinion though
Yes, the water doesn’t compress but increasing air pressure is affecting objects submerged- like fish. Simple law of physics. If you have a let say a cork suspended half way in the bottle with water and when you increase the pressure of air above the surface, the circulation will sink down. I have no clue about fishing but the fish definitely will feel changes in the air pressure.
After fishing. Walleye bass up here in the Land 10,000 Lakes Low pressure moving in. Storms. Triggers feeding. But most the time. Low pressure is followed by high pressure. Which usually leads to water temperature falls. Sometimes pretty fast. I’ve seen to Many times. Fish go crazy most times before a storm. And I agree with one other person on this comments. During low pressure they’ve feed up
Hey Mark, I agree with your overall conclusion about the weather conditions playing a much bigger role in fish activity than the barometric pressure.
I studied mechanical engineering in college and took a few classes about fluid mechanics and I can tell you that the pressure that the fish are feeling does go up and down depending on the atmospheric air pressure. The pressure at a given depth in the lake is given by this formula: (water pressure) = (atmospheric air pressure) + (water density)x(gravity)x(height of water column).
The part that always bothered me is that the difference between low and high barometric pressure (29 in*hg - 31 in*hg) is approximately 1 psi. To have an increase or decrease of 1 psi, you would have to move up or down 2.31 feet in the water column. So that means all the fish would have to do is swim up or down a couple of feet in the water column to completely negate the effects of the barometric pressure.
I know fishing is usually better in pre front conditions so I would assume the pressure is dropping at that point. This has always been a confusing topic for me.
Amen brother! I researched the heck out of this one and found most sources contradicted each other while none had answers that made sense. I appreciate you tuning into the channel!
@@markfisheroutdoors I read a report from some college study looking back over the years in BASS tournaments, 15 and more years ago, heavier weights were recorded in deeper water over shallow water on high pressure days. The weights were more consistent in deeper water than shallow. But under low pressure days, weights were larger in shallow water. On 4 day tournaments the weights basically even out over that time period with typical 4 day weather changes. The weather/weight swings were less in summer tournaments compared to winter tournaments.
Air pressure can not penetrate water so how do the fish feel it and react to it is the million dollar question underwater is it's own world I personally have exhausted all of the people I thought would have a answer to this and nobody really knows
I personally think it has more to do with light penetration and wind moving the particles in the water which get the bait moving and the bass follow and I believe bass feed at nite I've been nite fishing my hole life and caught way more and bigger fish at night