コイの鰓におけるガス交換に及ぼす農薬4種の影響

抄録

In other to develop a technique for monitoring the presence of agricultural chemicals in the aquatic environment, the effects of Cartap, MEP, MPP and Isoprothiolane on the gas exchange at the gills of the common carp were examined under irrigation for 60 min of the respiration chamber. Solutions of two-fold concentration of TLm value were employed. The effects of these chemicals appeared rapidly on the level of oxygen consumption, the minute volume of gill ventilation and the percent oxygen utilization at the gills. Furthermore, rapid and marked effects on the respiratory movement and oxygen pressure of the water in the opercular cavity (measured continuously) were additionally observed. But the effects were not observed on hematocrit value, hemoglobin concentration, pH, carbon dioxide content, oxygen content, oxygen capacity and oxygen saturation of the dorsal aortic blood.