BIG FISH and Thermocline
I was hoping you could give some of your expertise on the thermocline and how to go about fishing it.
Sorry about your question, I have been so busy fishing...it got lost in my emails.
In the winter, the water temperature is pretty much the same from top to bottom. As we enter into summer and the water continues to warm. Our lakes start to develop a thermocline. The thermocline depth will vary from lake to lake, depending on the overall depth of the lake and if there is water running in and out.
For an example, one of our San Diego lakes, usually stratifies at about 25 ft. You can see the thermocline on you HDS Lowrance electronics. It will be a line that runs across the meter that will be hazy. Above the line you will generally see quite a bit of activity. Below the line you will not see any activity. The water blow the line does not have enough oxygen to sustain life. The fish can go into this layer, but they have to come right back out.
In the summer time when we have a thermocline at 25 feet, I will fish the structure where the thermocline intersects the rock piles, underwater humps, long extended points and so forth. You will find that these intersections will generally hold the larger bass.
As we enter winter, the area above the thermocline will be cooling. Once it gets colder than the water below, the lake will turn over and homogenize top to bottom. At that time the fish can be anywhere. Also another way to find the thermocline in the summer, is to drop a temperature prob until you reach a large change in temperature. There will be a noticeable difference in temperature change.
Hope this help,