酸暴露对银大麻哈鱼（Oncorhynchus kisutch）幼鱼和成鱼的离子调节及海水适应的影响。

The effects of acid exposure on the ion regulation and seawater adaptation of coho salmon (Oncorhynchus kisutch) parrs and smolts.

作者信息

Powell J F, McKeown B A

出版信息

Comp Biochem Physiol C Comp Pharmacol Toxicol. 1986;83(1):45-52. doi: 10.1016/0742-8413(86)90011-3.

Abstract

Smolts exhibited decreases in plasma Na+ levels after 7 days and lower Na+, K+-ATPase activities 14 days after acid exposure. Parrs exhibited decreased plasma Na+ after 24 hr acid exposure. Plasma Na+ increased and Na+, K+-ATPase decreased in smolts after transfer to seawater. Parrs exhibited increased plasma Na+ as well as Na+, K+-ATPase activity immediately after transfer to seawater. It was concluded that acid exposure prior to entry into seawater was detrimental to coho salmon with regard to the length of acid exposure and stage of development. A possible mechanism by which fish die from acid stress is inhibition of gill Na+, K+-ATPase concomitant with decreases in plasma Na+ levels.

摘要

银化鲑在酸暴露7天后血浆钠离子水平下降，酸暴露14天后钠钾ATP酶活性降低。幼鲑在酸暴露24小时后血浆钠离子水平下降。转移到海水中后，银化鲑的血浆钠离子水平升高而钠钾ATP酶活性降低。幼鲑转移到海水中后，血浆钠离子水平以及钠钾ATP酶活性立即升高。得出的结论是，在进入海水之前的酸暴露，就酸暴露时间长度和发育阶段而言，对银大麻哈鱼是有害的。鱼类因酸应激而死亡的一种可能机制是鳃钠钾ATP酶受到抑制，同时血浆钠离子水平降低。