Wednesday, 10 October 2012
Wednesday, 19 September 2012
Barometric Pressure Effect On Fishing
This is part 1 of a series of articles on the theories of the different factors which produce good and bad fishing conditions. The theories aren't necessarily mine, although I've attempted to provide a thoughtful summary of information I have researched, with some modification based on personal experience.
I'm not entirely convinced that you should solely base your decision on whether to go fishing, on the measurement of the positive or negative factors based on theory. Although a number of the positive factors may indicate that the fishing will be good at your regular spot, I think to a large degree that the negative factors mean that you have to find and catch the fish in a different fashion than you would normally.
Barometric Pressure
The effect of barometric pressure on fishing feeding activity is one of the more interesting theories. In short, the theory proposes that a dropping air pressure brings on feeding activity, rising pressure turns the fish off feeding, high pressure results in the fish moving to shallower water, and low pressure results in fish moving to deeper water. This article will provide an overview on barometric pressure, summarize various theories about why atmospheric pressure affects fishing activity, and then summarize in tabular fashion the generally accepted fish behaviours with various barometric patterns.
Barometric pressure is the measure of the weight of the atmosphere above us. A barometer is used to measure air pressure. The earliest barometer consisted of a glass vacuum tube inserted into a container of mercury which was exposed to the pressure of the air. Increased air pressure would force the mercury up the tube in a height proportunal to the pressure. The height was measured in inches (inHg) or in millibars (1 inch = 33.864 millibars). Although new types of barometers are now used, these measures are still in place. In general, 30 inHg or 1016 millibars is considered to be normal air pressure. In normal weather, 30.5 is considered extreme high, and 28.5 is considered extreme low. The measures are taken at sea level, a higher elevation has less atmosphere above it, so a correction factor against the normal measure is needed depending on altitude.
It is believed that the effect of barometric pressure is greater in shallow water than deep, probably due to the pressure of the weight of the water in deep water being so high, that the air pressure above it is not relatively significant.
The principal theory, is that the effect of changing pressure on the swim bladders of fish makes them uncomfortable or dis-oriented. In this theory, the fish will move to feel well, or they feel bloated or full. With a lowering barometer, it is believed these fish move into deep water seeking higher water pressure and ride out the low pressure around structures. The theory suggests that just prior to change from a high to a low, fish will bite like crazy until the low hits and then stop. The difficulty with this theory, is that water is 900 times more dense than air, and generates signicantly more pressure than air. In fact,a 3 foot wave will produce a variation of pressure more significant than can be expected from a change in atmospheric pressure through a dramatic change, and the wave effect is happening every few seconds, rather than the hours or days that the atmospheric changes takes to occur.
Frankly, given that the pressure of water depth is such a significantly greater factor than the pressure of atmosphere, it seems likely that the weather conditions created by changes in barometric pressure, such as clouds, rain and wind, have more effect on fishing than the barometric pressure alone. So in the opinion of the author, barometric change is a good indicator of fishing change, but it's not because of the pressure change by itself, as much as what other weather conditions are likely to occur because of the pressure change.
The following table attempts to summarize the barometric pressure, and observations on fish activity and fishing techniques.
Of course, the longer a period of high feeding activity, the more likely the fish are to stop feeding. And the longer the period of inactivity, the more likely the fish are to start feeding.
Draw your own conclusions on the effect of a changing barometric pressure on fishing activity. Whether pressure changes by themselves cause feeding changes may be in question, but the patterns seem to be there irregardless.
*Source from David Girdwood
Manager, Thefishingnut
www.thefishingnut.com
I'm not entirely convinced that you should solely base your decision on whether to go fishing, on the measurement of the positive or negative factors based on theory. Although a number of the positive factors may indicate that the fishing will be good at your regular spot, I think to a large degree that the negative factors mean that you have to find and catch the fish in a different fashion than you would normally.
Barometric Pressure
The effect of barometric pressure on fishing feeding activity is one of the more interesting theories. In short, the theory proposes that a dropping air pressure brings on feeding activity, rising pressure turns the fish off feeding, high pressure results in the fish moving to shallower water, and low pressure results in fish moving to deeper water. This article will provide an overview on barometric pressure, summarize various theories about why atmospheric pressure affects fishing activity, and then summarize in tabular fashion the generally accepted fish behaviours with various barometric patterns.
Barometric pressure is the measure of the weight of the atmosphere above us. A barometer is used to measure air pressure. The earliest barometer consisted of a glass vacuum tube inserted into a container of mercury which was exposed to the pressure of the air. Increased air pressure would force the mercury up the tube in a height proportunal to the pressure. The height was measured in inches (inHg) or in millibars (1 inch = 33.864 millibars). Although new types of barometers are now used, these measures are still in place. In general, 30 inHg or 1016 millibars is considered to be normal air pressure. In normal weather, 30.5 is considered extreme high, and 28.5 is considered extreme low. The measures are taken at sea level, a higher elevation has less atmosphere above it, so a correction factor against the normal measure is needed depending on altitude.
It is believed that the effect of barometric pressure is greater in shallow water than deep, probably due to the pressure of the weight of the water in deep water being so high, that the air pressure above it is not relatively significant.
The principal theory, is that the effect of changing pressure on the swim bladders of fish makes them uncomfortable or dis-oriented. In this theory, the fish will move to feel well, or they feel bloated or full. With a lowering barometer, it is believed these fish move into deep water seeking higher water pressure and ride out the low pressure around structures. The theory suggests that just prior to change from a high to a low, fish will bite like crazy until the low hits and then stop. The difficulty with this theory, is that water is 900 times more dense than air, and generates signicantly more pressure than air. In fact,a 3 foot wave will produce a variation of pressure more significant than can be expected from a change in atmospheric pressure through a dramatic change, and the wave effect is happening every few seconds, rather than the hours or days that the atmospheric changes takes to occur.
Frankly, given that the pressure of water depth is such a significantly greater factor than the pressure of atmosphere, it seems likely that the weather conditions created by changes in barometric pressure, such as clouds, rain and wind, have more effect on fishing than the barometric pressure alone. So in the opinion of the author, barometric change is a good indicator of fishing change, but it's not because of the pressure change by itself, as much as what other weather conditions are likely to occur because of the pressure change.
The following table attempts to summarize the barometric pressure, and observations on fish activity and fishing techniques.
| Pressure Trend | Typical Weather | Fish Behaviour | Suggested Fishing Tactics |
| High | Clear skies | Fish seek cover, look for logs, weeds in shallows. If water too warm, will stop biting. | Fish structure close to surface, with shallow crankbaits, poppers, etc.. |
| Rising | Clearing or improving | Fish start to move out of deeper water. After a day or so, go to normal feeding. | Fish with brighter lures and near cover, moving from deeper water to shallower water. |
| Normal and stable | Fair | Normal activity. | Experiment with your favorite baits and lures. |
| Falling | Degrading | Most active feeding. | Range of different methods. Surface and shallow running lures may work well. |
| Slightly lower | Usually cloudy | Fish seek deeper water, with water temp maybe also slowing them down. May need to settle before feeding again. | Use deep running lures at a moderate speed. |
| Low | Rainy and stormy | Fish move to deeper structures, may not feed. | Fish deep structures, vary your methods. |
Of course, the longer a period of high feeding activity, the more likely the fish are to stop feeding. And the longer the period of inactivity, the more likely the fish are to start feeding.
Draw your own conclusions on the effect of a changing barometric pressure on fishing activity. Whether pressure changes by themselves cause feeding changes may be in question, but the patterns seem to be there irregardless.
*Source from David Girdwood
Manager, Thefishingnut
www.thefishingnut.com
Thursday, 2 August 2012
Ini Bukan Udang Azil
Ini Bukan Udang Azil
Ari sabtu tu kan....ahhhhh.....ini semua salah Majuan, member keja kawan....dia bertanggungjawap sepenuhnya atas kejadian ini...otomatik kawan pun terlibat sama...yg lg 2 ekor tuh...tatau camana buleh sesat dan ada sekali....
Yg terlibat:
1. kawan
2. majuan
3. pakdann
4. Aruan
Orang yg bertanggungjawap dlm sebutan kes ini
kawan harap sgt2 student2 dia tgk kelaku huduh beliau ini...
sebagai bukti...karang kata kawan tipu plak...kata beli udang kat market...
Ini dia tekong...nama dia Lan...member si Majuan...dia pun parttime ja bawak bot...
kalau dlm trip kan...semua akan hepi.....
duduk bawah pokok pun hepi
dapat udang pun hepi
dapat udang lg beso lg la hepi...iskh...
yg x berapa hepi cuma kawan...psl udang beso sikit je ibu jari...xde sapa pun yg nak snap...sedih sungguh....
ini namanya siakap komplen...apsal nama dia cenggitu....kaki mancing pasti tau...punya la banyak dan 2 pot pumpun senang2 ja dia kitai...
dapat jugak kat dia sekor....
baru pukul 3.30pm...langit dh gelap...ujan tetiba ja trun...cabut la apalagi...tunggu pun x guna...udang bukannnya berselera nak makan time ujan...
dh naik jeti balik..ujan selebat alam...mari kita bahagi2...
kawan syak sesuatu yg kurang baik telah dirancang dari awal oleh 2 ekor nie...psl jut yg kawan guna tetiba ilang....kalu tidak le dpt 14 ekor...3 ekor ilang sekali ngan jut...ades.....jatuh dlm sungai plak....adui la...
Apapun...trip nie memang best...padahal nak riki je tempat...hasil pun ok walaupun sekerat ari ja mancing....pada Majuan dan Lan,mekasih kerana entertain kami...hangpa memang best...bulan depan kami mai lagi...
Monsun Casting Tournament 2012
Monsun Casting Tournament 2012
Monsun Casting Tournament 2012
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Thursday, 5 July 2012
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