[Peculiarities of phosphoric compound metabolism in liver mitochondria of carp adapted to higher concentrations of CO2 in water].

The content of adenine nucleotides, ATPase activity, the amount of total and inorganic phosphorus in the carp liver mitochondria were studied as affected by CO2 high concentrations. It is shown that during adaptation to the CO2 higher level in the medium the amount of ATP in fishes undergoes the most significant changes. The organism response to the effect of carbon dioxide depends on its concentration in the medium and time of its action. When fishes were for 24h under conditions of the 0.4mM CO2 concentration, the ATP content in the carp liver mitochondria surpasses the control level and under conditions the 0.8 mM CO2 concentration it reaches the control level. The presence of 0.4 and 0.8 mM CO2 concentration decreases the ATP content 7 days later. The amount of inorganic phosphorus in the liver mitochondria of experimental fishes undergoes similar changes. An increase in the CO2 concentration in the water medium up to 0,4 and 0,8 mM inhibits Na+, K+, Mg2+-ATPase in fish organelles, the inhibition being more pronounced in a trial with 0.8 mM CO2.