CO2환경에서의 넙치(Paralichthys olivaceus) 심기능의 경시적 변화
Time-course Response of the Heart Function in Flounder Paralichthys olivaceus to CO2
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Cardiorespiratory variables were measured in flounder Paralicthys olivaceus exposed to acidified seawater equilibrated with a gas mixture containing 5% CO2 gas for 72 h at 20℃. It was found that CO2 produced a significant increase in arterial P CO2 ( P aCO2) and significant decreases in arterial pH (pHa). CO2 transiently increased heart rate within 30 min of exposure. After cardiac output was elevated by the increase in heart rate within 30 min, was then reduced by the decrease in both stroke volume and heart rate. The heart responses of flounder differ from those of yellowtail to high CO2 environment.
Abstract
Cardiorespiratory variables were measured in flounder Paralicthys olivaceus exposed to acidified seawater equilibrated with a gas mixture containing 5% CO2 gas for 72 h at 20℃. It was found that CO2 produced a significant increase in arterial P CO2 ( P aCO2) and significant decreases in arterial pH (pHa). CO2 transiently increased heart rate within 30 min of exposure. After cardiac output was elevated by the increase in heart rate within 30 min, was then reduced by the decrease in both stroke volume and heart rate. The heart responses of flounder differ from those of yellowtail to high CO2 environment.
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