Comparison of the acid-base responses to CO2 and acidification in Japanese flounder (Paralichthys olivaceus)
Comparison of the acid-base responses to CO2 and acidification in Japanese flounder (Paralichthys olivaceus)
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DOI：
10.1016/j.marpolbul.2004.07.013
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发表时间：
2004-12-01
影响因子：
5.8
通讯作者：
Ishimatsu, A
中科院分区：
文献类型：
--
作者：
Hayashi, M;Kita, J;Ishimatsu, A
为了研究水生高碳酸血症的生物毒性是由于CO2的直接影响还是由于CO2对海水酸化的影响，将日本比目鱼（Paralichthys olivaceus）置于用含5%CO2（pH 6.18）的空气混合物平衡的海水中，或用1 N H2SO4酸化至相同pH的海水中。在CO2暴露组中，所有的鱼在48 h内死亡，而在酸组中没有发生死亡。酸碱参数以及血浆离子浓度在CO2暴露组中受到严重干扰，而在酸组中受到的影响最小。这些结果清楚地表明，CO2组的死亡率是溶解CO2水平升高的直接结果，而不是水pH值降低的影响。（C）2004 Elsevier Ltd.保留所有权利。
To investigate whether the biological toxicity of aquatic hypercapnia is due to the direct effects of CO2 or to the effects of acidification of seawater by CO2, the Japanese flounder (Paralichthys olivaceus) was subjected to seawater equilibrated with a gas mixture of air containing 5% CO2 (pH 6.18) or seawater acidified to the same pH with 1 N H2SO4. All the fish died within 48 h in the CO2 exposure group, whereas no mortality occurred in the acid group. Acid-base parameters as well as plasma ion concentrations were severely perturbed in the CO2 exposure group, whereas they were minimally affected in the acid group. These results clearly demonstrate that the mortality in the CO2 group is a direct result of the elevated levels of dissolved CO2 and not to the effects of the reduced water pH. (C) 2004 Elsevier Ltd. All rights reserved.