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鲤暴露于质量浓度 2 0 μg/L的镉溶液中 2周时 ,其相对生长率比对照组有增加的趋势 ;暴露 30d后鲤生长速度低于对照组 ;暴露 3～ 7d ,鲤血浆渗透压急剧下降 ,Ca2 +、Na+浓度降低而Mg2 +浓度升高。电镜观察显示 ,鲤脑垂体催乳素细胞分泌量增加 ,血浆中肾上腺皮质醇质量浓度明显增高。其离子水平及激素水平的改变均是暂时的 ,暴露 14d后恢复至正常水平。镉在短时期内导致低钙并对鲤有短期促生长效应 ,这可能与脑垂体催乳素分泌有关 ,而皮质醇含量的增高可能是鲤对镉刺激的应激反应。
The relative growth rate of carp exposed to the concentration of 20 μg / L of cadmium solution for 2 weeks increased more than that of the control group. After 30 days of exposure, the common carp growth rate was lower than that of the control group. After 3-7 days of exposure, the plasma osmotic pressure Steep decline, Ca2 +, Na + concentration decreased and Mg2 + concentration increased. Electron microscopy showed that carp pituitary prolactin cells increased secretion of plasma adrenal cortisol mass concentration was significantly higher. The ion level and hormone level changes are temporary, returned to normal after 14d exposure. Cadmium in the short period of time lead to low calcium and short-term promotion of carp growth effect, which may be related to the secretion of prolactin and pituitary gland, while the increased cortisol may be common carp stress response to cadmium stimulation.