Temperature is really the key, but I usually fish the
upper thermocline
, which is generally what is suitable for most fish. During the summer, oxygen will normally be poor below the thermocline. The reason is that tiny organisms are decomposing and falling down from the layer above.
Do fish like the thermocline?
“The thermocline is a band of water with rapidly changing temperatures.”
As summer progresses, the water below the thermocline grows increasing hostile to fish
. “As organic material from plants or animals sinks to the bottom, decomposition ties up all of the available dissolved oxygen,” Dreves said.
What is below the thermocline?
Below the thermocline lies the
abyssal region of the oceans
, where the temperature is much lower and variability generally much weaker than in the upper ocean. The average temperature is approximately 3.5 °C. These cold waters result from the cooling of water masses by the atmosphere in polar regions.
What is above the thermocline?
During the summer, warm water, which is less dense, will sit on top of colder, denser, deeper water with a thermocline separating them.
The warm layer is called the epilimnion
and the cold layer is called the hypolimnion.
How do you know where the thermocline is?
What does thermocline mean for fishing?
A thermocline is
a layer of water more often found in a large body of water, where the temperature gradient is greater than that of the warmer layer above and the colder layer below
.
Do shallow lakes have a thermocline?
The thickness of the thermocline can vary from as little as a foot to more than 10 feet.
The depth of the thermocline might be as shallow as 3 feet in a shallow pond
or as deep as 35 or 40 feet in a deep, clear lake. Initially, when a lake stratifies, the upper and lower portions are well oxygenated.
What does thermocline look like on fish finder?
What causes thermocline in lakes?
A Thermocline is formed by
the effect of the sun
, which heats the surface of the water and keeps the upper parts of the ocean or water in a lake, warm. Water near the bottom remains colder as sunlight doesn’t penetrate enough.
Do all oceans have a thermocline?
In the ocean, the depth and strength of the thermocline vary from season to season and year to year.
It is semi-permanent in the tropics, variable in temperate regions (often deepest during the summer), and shallow to nonexistent in the polar regions
, where the water column is cold from the surface to the bottom.
What is the top of the ocean called?
The top layer of the ocean is called the
epipelagic zone
.
Is there a thermocline in the winter?
During summer, the thermoclines are pushed much deeper as the sun and other elements bare down on the surface water.
Winter, on the other hand, sees the thermocline depths rise as the surface waters get colder
.
What causes a Halocline?
In oceanography, a halocline (from Greek hals, halos ‘salt’ and klinein ‘to slope’) is a cline, a subtype of chemocline caused by
a strong, vertical salinity gradient within a body of water
.
How does thermocline affect bass fishing?
What is the layer on top of water?
| A B | SATURATED ZONE A layer of permeable rock or soil in which the cracks and pores are completely filled with water. | WATER TABLE The top of the saturated zone, or depth to the groundwater in an aquifer. |
|---|
How do you find the thermocline on a Humminbird?
Now here’s what surprised me….
the thermocline is also clearly identified by Humminbird’s Side Imaging sonar
, and not only by the down-looking sonar returns. You can see the thermocline as a change in color of the water column, within that dark stripe running down the middle of the side imaging view.
Will walleye go below the thermocline?
In many deep clear lakes photosynthesis can occur below the thermocline
. When you have phytoplankton growth and oxygen levels high because of photosynthesis, fish will seek out deeper water. Walleye need DO (dissolved oxygen) levels of > 5.0 ppm to survive. They can tolerate levels down to 2.0 ppm for a short time.
How deep does a lake have to be to have a thermocline?
Typically, a thermocline forms in lakes
deeper than 10 feet
, including farm ponds. Other factors can also influence where the thermocline is established. For example, a turbid lake may have a thermocline at 5 feet while a clear lake thermocline could be at 16-plus feet.
Do ponds have a thermocline?
This layering of water can vary in depth, but is often very distinct within a pond or lake.
Thermocline is the name of the separation between the pond layers
. It is often the transition from the top, warm water and the cold bottom water.
How do you tell if a lake is stratified?
Typically stratified lakes show three distinct layers, the Epilimnion comprising the top warm layer, the thermocline (or Metalimnion): the middle layer, which may change depth throughout the day, and the colder Hypolimnion extending to the floor of the lake.
What causes a winterkill of fish?
Winterkill occurs when
fish suffocated from lack of dissolved oxygen
. Winterkill is the most common type of fish kill. When severe, it has devastating effects on fish populations and fishing quality.
What do rocks look like on a fish finder?
Rocks show up as
hard bottom with bumps
. The bump size depends on the size of the rocks. I use the side scan to find boulders off to the side, regular sonar (2D) and DownScan to find rocks and determine their size. The DownScan shows big rocks as spikes.
