低pH值及铝对深鳅吸收^（45）Ca的影响

Effects of Low pH Value and Aluminum on Uptake of ￣(45)Ca by Misgurnus anguillicaudatus

为了探讨低ＰＨ和铝对水生生物的毒性或联合毒性效应，进一步研究钙缓解作用机理，用放射性核力’Ｃａ作为示踪剂，研究在低ｐＨ值及加铝条件下，泥鳅（Ｍｉｓｇｕｒｎｕｓａｎｇｕｉｌｌｉｃａｕｄａｔｕｓ）对钙离子的吸收分布情况．结果表明，生长在ｐＨ为７．１０时，４５Ｃａ在泥鳅体内各器官的９６ｈ放射性比度为：皮肤３９５３２Ｃｐｍ／ｇ，骨骼３８１１６Ｃｐｍ／ｇ，鳃２５４９５ｃｐｍ／ｇ，肌肉１６５１ｃｐｍ／ｓ；低ｐＨ（４．７０）条件下，泥鳅体内４５Ｃａ含量较正常条件下（对照组ＰＨ７．０）下降百分比为：皮肤８１．０７％，骨骼８４．４１％，鳃８０．１１％，肌肉５．８８％；在低ＰＨ值并加铝时，泥鳅体内备器官４５Ｃａ含量与对照组相比，下降百分比分别为：皮肤８９．８７％．骨骼８８．８３％，鳃８６．１７％，肌肉２６．４７％．并讨论了酸雨危害对鱼体钙代谢的可能影响．

The effects of low PH value and with or without the addition of aluminum on the uptake of 45Ca by Misgurnus anguillicaudatus were studied. The results showed that the speific activities of 45 Ca are 39 532 cpm/g in skin,38 116 cpal/g in skeleton, 25 495 cpm/g in gill and 1 651cpm/g in muscle resistively after exPOsed to PH 7.10(control) for 96 hi Compared with the control, the specaac activities of Ca decline about 81. 07% in skin,84. 41% in skeleton 0.11% in gill and 5.88% in muscle after exposed to PH 4. 70 without aluminum. Under the condition Of PH 4.70 with the eddition Of aluminum (1.0 mp/L),the speific activities of 45Ca decline .about 89. 87% in skin, 88.83% in skeleton. 86.17 % in ac and 26.47 % in muscle respeCtively.The effects Of acid the on the calcium metabolism in fish were discussed.