Originally Posted By: fish n chips
So I have been reading all along that fish go deeper in the winter and have been thinking that they do this for two reasons. Water temps and DO. However, it seems as if water temp is the most important thing and DO just happens to be there. Does a fish go into their temperature zone and will not pursue DO outside of that zone when it runs out? It would rather suffocate than be to cold/hot?
Have read this on DO and thermocline. http://forums.pondboss.com/ubbthreads.ph...1&site_id=1
Noticed a few more in the archives I that I need to read.


I think that is the case. I have no other reason why HSB would die from a winterkill but RBT in the same pond survived.

Both species died from low DO under the ice, but the number of HSB that died was over 5x greater than the RBT. Both fish were about the same size, so that's one more variable that gets tossed out the window.

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