Re: CO2 Poisoning of Fishes

[SnoTabby at aol_com]

I remember reading some time ago that CO2 in large quantities affects how the 
fish takes in oxygen, or rather don't take it in. The actual mechanism of 
suffocation I can't remember (does it really matter?) but I believe that in 
large quantities the CO2 displaces the O2 in the fish's gills making it 
impossible for the fish to get enough O2 in every "breath".

I'll have to hunt around and see if I can find the piece of literature for 
more specifics.

Susan, full of "useless" tidbits in a wonderfully warm and sunny day in NH

In a message dated 5/21/99 4:03:43 PM, Aquatic-Plants-Owner at actwin_com writes:

<<Your pH swing theory is plausible, but because Dyniar found his dead
fish in the morning, the plants could not have been producing oxygen
without lights. Thus the CO2 "poisoning" hypothesis can not be rejected
offhand. 

I do not know whether CO2 has the same physiological effect on fish as
on mammals, but at higher concentrations it acts in mammals as a
narcotic.>>

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