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Old 01-18-2011, 11:41 AM   #1 (permalink)
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Default Thermocline questions

Since I know very little about the subject. When are fish above or below a/the thermocline. I see trout jumping this time of year, so I assume that fish are above it ? Do all fish relate to it ?
Thanks in advance
Phil Hill
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Old 01-18-2011, 01:44 PM   #2 (permalink)
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Default Re: Thermocline questions

The thermocline layer (metalimnion) is located between the warmer upper layer (eplilimnion) and colder lower layer (hypolimnion) when lakes stratisfy into layers, usually during the warmer summer months.
Your sonar unit can display the dense layer as a dark line or darker zone depending how abrupt the water temperature change occurs at the thermocline.
During the winter the cold night air cools the upper layer and wind mixes the water column and the thermocline disapears when the layers mix.
When there is a thermocline the dissolved oxygen levels are lower below it and fish like bass tend to locate just above it. A dense thermocline is about 2 feet thick and can be over 10 feet thick and the depth can also vary due to water depth and current created by wind.
Hope that helps more than it confuses.
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