作　　者： ; ; ; ; ; ; ; ; ; (韩国苍）; (高玉奎）;

机构地区： 中国水产科学研究院黑龙江水产研究所

出　　处： 《大连海洋大学学报》 2013年第4期340-346,共7页

摘　　要： 对达里湖鲫Carassius auratus Linnaeus 3月龄幼鱼(体长为4.16 cm±0.47 cm)分别在不同浓度梯度下进行盐度和碱度急性胁迫试验,分析盐度、碱度以及盐碱混合对达里湖鲫的毒性影响,并在此基础上采用水生态毒理联合效应相加指数法进行了氯化钠(NaCl)和碳酸氢钠(NaHCO3)浓度的联合毒性试验,探讨了在不同类型盐碱水质条件下开展增养殖活动的可行性。结果表明:在pH为7.0±0.5,碱度为0.44mmol/L时,盐度对试验鱼的24、48、72、96 h的半致死浓度(LC50)分别为11.57、11.14、10.89、10.61,安全值(SC)为3.10;在pH为8.5±0.5,盐度为1.9～4.3时,碱度对试验鱼的24、48、72、96 h的LC50分别为71.93、67.80、65.80、63.42 mmol/L,SC为18.07 mmol/L;在96 h内NaCl和NaHCO3的关系全部为拮抗作用,且其拮抗效应逐渐减弱并趋向于相加作用。本试验结果可为今后在内陆盐碱水域开展达里湖鲫增养殖提供科学依据。 The acute toxicity of salinity and alkalinity to 3 month old crucian carp Carassius auratus with body length of 4.16 cm±0.47 cm in Dali Lake was studied at various concentrations of salinity prepared by NaCl, alkalinity from（ NaHCO3 ） and saline-alkaline mixture by one-way and two-way of salt or/and alkaline tests. Based on the values of LC50 for salinity and alkalinity at different time, the marking additive index （AI） was adopted to evaluate the effects of joint toxicity on the crucian carp. The results showed that the values of LCso of salinity were found to be 11.57 at 24 h, 11.14 at 48 h, 10.89 at 72 h, and 10.61 at 96 h at alkalinity of 0.44 mmol/L and pH 7.0± 0.5 ,with the safe salinity of 3.10. Under the conditions of salinity 1.9-4.3 and pH 8.±0.5, the values of LCs0 of carbonate-alkalinity were 71.93 mmol/L at 24 h, 67.80 mmol/L at 48 h, 65.80 mmol/L at 72 h and 63.42 mmol/L at 96 h with the safe alkalinity of 18.07 mmol/L. The toxic effects were antagonism in 96 h, but declined and tended to be additive. The findings provided theoretic basis for the culture and enhancement of crucian carp in saline-alkaline inland such as Dali Lake in future.

关 键 词： 达里湖鲫 盐度 碱度 急性胁迫 毒性

领　　域： [农业科学] [农业科学] [农业科学]