青蟹（Callinectes sapidus）的体温与血液酸碱状态

Temperature and blood acid-base status in the blue crab, Callinectes sapidus.

作者信息

Cameron J N, Batterton C V

出版信息

Respir Physiol. 1978 Nov;35(2):101-10. doi: 10.1016/0034-5687(78)90015-4.

Abstract

The blood acid-base status of blue crabs. Callinectes sapidus, was assessed at temperatures ranging from 10 to 30 degrees C. Blood pH varied inversely with temperature, with a slope (dpH/tT) of - 0.012. The PaCO rose only slightly between 10 and 27 degrees C, from 2.09 torr to 2.91 torr, with the result that the total dissolved CO2 actually fell slightly due to the decrease in solubility. In vitro the blood behaved like a conventional Rosenthal system, with a rise in PCO2 at constant CT which was much greater than the observed in vivo increase. I vivo the CT of the blood decreased significantly in order to maintain the OH/H ratio. The ratio of ventilation to oxygen consumption (and presumably carbon dioxide production) was not significantly different at 10 and 27 degrees C, indicating that ventilation is not participating in the acid-base adjustment to temperature. The principal acid-base regulating mechanisms in the crab are probably ionic exchanges in the gills rather than ventilatory control of PaCO2.

摘要

对青蟹（学名：Callinectes sapidus）在10至30摄氏度温度范围内的血液酸碱状态进行了评估。血液pH值与温度呈反比，斜率（dpH/dT）为 -0.012。在10至27摄氏度之间，动脉血二氧化碳分压（PaCO₂）仅略有上升，从2.09托升至2.91托，结果由于溶解度降低，总溶解二氧化碳（CT）实际上略有下降。在体外，血液表现得像一个传统的罗森塔尔系统，在恒定CT下二氧化碳分压（PCO₂）的升高远大于体内观察到的升高。在体内，血液的CT显著下降以维持氢氧根离子/氢离子（OH⁻/H⁺）比率。在10和27摄氏度时，通气与氧气消耗（以及推测的二氧化碳产生）的比率没有显著差异，这表明通气并未参与对温度的酸碱调节。螃蟹主要的酸碱调节机制可能是鳃中的离子交换，而非对PaCO₂的通气控制。