Any fisherman knows that the more you understand about fish, the easier it is to catch them. Familiarity with barometric pressure trends is a good example, as it affects where fish spend their time. Barometric pressure is a measurement of atmospheric weight. Fish are affected by the pressure of the air on the water, particularly in shallow water.
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Use your barometer to watch for rising and lowering pressure where you're planning to fish. Often, fish seem to bite more when the pressure is changing, so this might be a good time to go.
Find fish in deep or intermediate depths during rising pressure. At this time, fish will be more active and will be attracted to brighter lures rather than bait.
Look for fish in deeper waters with more cover after the pressure rises to a high level. This typically means that the weather is clear and the fish will be looking for places where they can hide. Use more bait -- instead of lures -- to attract the fish during this time, as the fish slow down and are less likely to be attracted to shiny or colorful objects.
Fish during lowering barometric pressure, as fish will be most active. Use lures. and fish in shallower water; the weather is less likely to be clear.
Look for fish is shallow water during low pressure. If it begins to rain heavily, fish may move to deeper water. Use slow-moving lures or bait during this time to gain the attention of the fish.
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