【摘要】 在水温（16±0.5）℃下,采用静水实验法研究不同浓度的铜离子对体质量（35.8±9.6）g的细鳞鲑Brachymystaxlenok幼鱼鳃和肝脏的急性毒性,铜离子浓度为24h半致死浓度(LC₅₀)的1/4倍、1/2倍,及1倍。结果表明:铜胁迫初期细鳞鲑幼鱼的鳃充血而颜色而变暗,后期鳃血管和细胞病变,颜色变浅。鳃丝先弯曲,然后溃烂,最后脱落;肝脏出血、肿大,切片显示肝脏细胞空泡化,后期可以看到坏死的细胞核。铜离子对细鳞鲑幼鱼的鳃和肝脏组织有明显的破坏作用,是铜急性中毒致死的原因之一。更多还原

【Abstract】 The acute toxicity of copper ion to gill and liver of juvenile Brachymystax lenok was studied under low temperature（16±0.5）℃. The concentrations of copper ion are 0.88 mg.L^-1, 0.44 mg·L^-1, 0.22 mg·L^-1, 0.00 mg·L^-1. In the early stage of experiment, the overall color of gill became dark because of congestion, and change shallow in color in the later stage. Gill filements were changed from bending to fester, last fall. The liver was shown to change to bleeding, and swelling, and under the histological sections the hepotacytes were changed to bubble with the necrosis of the dead nuclei. The destruction of gill and liver by copper is one of the causes of acute poisoning death of the juvenile.更多还原