作为典型的盐碱湖泊,青海湖水钙离子浓度仅为同盐度海水的1/10。本试验采用单因子静态急性毒性和室内生长试验方法,研究了不同Ca2+浓度对青海湖裸鲤(Gymnocypris przewalskii)幼鱼生存和生长的影响,以期了解适宜青海湖裸鲤幼鱼生长的钙离子浓度范围。结果表明:在Ca2+浓度为0~2431.10 mg·L-1(约为同盐度海水值的0~20倍)水体中,96 h内青海湖裸鲤幼鱼100%存活;在为期60 d的生长试验中,高Ca2+浓度组(1246.02±9.83)mg·L-1与低Ca2+浓度组(10.83±0.11)mg·L-1青海湖裸鲤幼鱼存活率均在95%以上,而体长、体重、体长绝对生长率、体重绝对生长率和特定生长率均显著低于对照组(120.65±1.62)mg·L-1(P<0.05),各指标的排列顺序依次为:高Ca2+浓度组<低Ca2+浓度组<对照组,高Ca2+浓度组的特定生长率仅为对照组的54.62%。综上所述,青海湖裸鲤幼鱼可耐受的Ca2+范围较广,但过低或过高的Ca2+浓度均会导致青海湖裸鲤生长缓慢,且高Ca2+浓度抑制效果更为明显。 As a typical saline lake, the concentration of calcium ion in Qinghai Lake is only 1/10 of the salinity water. In this study, single-factor static acute toxicity and indoor growth test methods were used to study the effects of different concentrations of Ca2 + on the survival and growth of juvenile Gymnocypris przewalskii in Qinghai Lake, in order to understand the calcium ion concentration range. The results showed that 100% of freshwater carp larvae in Qinghai Lake were alive within 96 h in Ca2 + concentration of 0 ~ 2431.10 mg · L-1 (about 0 ~ 20 times of salinity) In the growth experiments, the survival rates of juvenile carp larvae in the high Ca2 + concentration group (1246.02 ± 9.83) mg · L-1 and the low Ca2 + concentration group (10.83 ± 0.11) mg · L-1 were over 95% , Body weight, absolute growth rate of body length, absolute growth rate of body weight and specific growth rate were significantly lower than those of the control group (120.65 ± 1.62) mg · L -1 (P <0.05). The order of the indexes was high Ca 2+ concentration Group