氯化汞对中华绒螯蟹幼蟹蜕皮、生长和存活的影响(英文)  

Effect of Mercury Chloride for Survival,Growth and Molt of Juveniles of the Chinese Mitten Crab,Eriocheir Sinensis

作　　者：赵艳民[1] 王新华[1] 于洋[1] 武靖阳[1] 

机构地区：[1]南开大学生命科学学院,天津300071

出　　处：《南开大学学报（自然科学版）》2009年第3期53-58,共6页Acta Scientiarum Naturalium Universitatis Nankaiensis

基　　金：Suppored by the National Natural Science Foundation of China(30870329)

摘　　要：通过向水体添加不同浓度的汞(Hg^(2+)),观察其对中华绒螯蟹幼蟹(2.01±0.16)g的毒性影响。结果表明,Hg^(2+)对其24,48,72,96 h的半致死浓度(LC_(50))分别为0.542 8,0.471 6,0.433 2和0.342 3 mg/L.中华绒螯蟹幼蟹在0,0.01,0.05,0.10,0.20,0.30 mg/L的Hg^(2+)条件下饲养40 d后,各浓度组幼蟹存活率分别为96.67%,86.67%,73.33%,63.33%,56.67%,43.33%;增重率和蜕皮率随着Hg^(2+)浓度的升高而降低。可见水体中的Hg^(2+)能够抑制中华绒螯蟹的生长和蜕皮,高浓度的Hg^(2+)甚至会造成幼蟹的死亡。根据Hg^(2+)对中华绒螯蟹的毒性作用确定水体中汞的最大允许量为0.034 2 mg/L。The toxicity of mercury chloride to juvenile Eriocheir sinensis over the short-term （24, 48, 72, 96 h） and during continuous exposure 40 was investigated. The result of acute assay showed that the median lethal concentration of mercury chloride to juvenile E. sinensis was 0. 542 8, 0. 471 6, 0. 433 2, 0. 342 3 mg/L at 24, 48, 72, 96 hour respectively. The survival rates of juvenile E. sinensis exposed to 0 （control）, 0. 01, 0. 05, 0.10, 0.20, 0.30 mg/L mercury chloride after 40 days were 96.67%, 86. 67%, 73.33%, 63.33%, 56.67%, 43.33%. The weight gain of crabs exposed to 0. 05 mg/L was significantly lower than those 0.01 mg/L mercury chloride and the control solution. With the mercury concentrations increased, the number of molting crabs and the molting rate was decreased. The maximum permissible concentration was 0. 034 2 mg/L. The results of the study suggest that level of mercury in the aquatic environment may have a significant effect on the juvenile E. sinensis.

关 键 词：中华绒螯蟹 急性毒性 亚急性毒性 蜕皮 生长 

分 类 号：S865.49[农业科学—野生动物驯养] Q959.223.5[农业科学—畜牧兽医]