海水中四种重金属对蒙古裸腹溞的毒性

TOXICITY OF FOUR HEAVY METALS IN MARINE WATER TO MOINA MONGOLICA

摘要: 本文反映了Hg²⁺,Cu²⁺,Cd²⁺,Cr（6）对蒙古裸腹溞（Moina mongolica Daday）的存活、生长、生殖及内禀增长率（r_m）毒性的研究工作。得出这四种重金属对该溞的48hrLC₅₀分别为 0.00334、0.0888、3.89、4.24mg/l。文中还反映了这四种重金属的不同混合方式对蒙古裸腹溞生长、生殖和内禀增长率的毒性。两种金属混合后的毒性加强（Hg/Cu 除外）;三种和四种金属的混合毒性低于两金属的混合毒性。

Abstract: The acute and chronic toxicity of mercury, copper, cadmium andchromium to the survival, growth, reproduction and the intrinsic rate of increase(r_m) of M. mongolica were studied. The 48 hr LC₅₀ of Hg²⁺ Cu²⁺, Cd²⁺ andCr(6) was 0.0034, 0.0888, 3.89 and 4.24 mg/l respectively. The toxicity ofcombined different metals to the organism was also studied. The result reveals thatthe toxicity of mixtures of two metals was much stronger than the single one (ex-cept Hg/Cu). While the toxicity of three or four metals combination was lower thanthat of two metals.