Re: **********TEMP/DO HISTORY Hartwell Striper Fishery "Die Off" **********

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Posted by bubba on October 16, 2018 at 08:49:31:

In Reply to: ********** Hartwell Striper Fishery "Die Off" ********** posted by bubba on October 15, 2018 at 08:56:50:

I started getting Hartwell temp/do data from the DNR in 2012 and started posting it on the Striper Board at that time. While the charts have gotten a little more "sophisticated" over time as I tried to convert data to information I hope they have been helpful for fishing strategies.

In relation to the "September" events we have experienced, I went back to the readings at the closest to September 1 from 2012 through 2018 and assembled the information below. While the numbers might not be legible just keep in mind that the depth goes from left to right with deep water on the right, the red line indicates the temp at those depths, and the blue line represents the DO at those depths.

I recently heard that Stripers cannot really "detect" DO level but can "detect" temperature and they shoot for that comfortable temperature where DO should be life sustaining. This another way of stating what our DNR representative stated in a presentation at the ASC meeting on 5/10/16 ""...stripers like most cool water species will choose a desired temperature over a desired oxygen level..."

As you can see, the beginning of September in all cases, EXCEPT the one in 2012, indicate significant DO issues (DO less than 4 PPM) at depths where the Temp is in the Striper's desired levels (60-70 degrees).

My conclusion is that HOT summers where the water temp at depths increases and DO levels decrease drives the Stripers into a "Death Trap".

Just thought I'd share what I see....

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