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DOI : , Vol.21, No.5, 91 ~ 98, 2013
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| Title |
| Chronic Toxicity of Nickel to Daphnia magna, Daphnia sp. and Moina macrocopa |
| 강한솔 Han Sol Kang , 김규리 Kyu Ri Kim , 박형순 Hyung Soon Park , 강민구 Min Koo Kang , 신관우 Gwan Woo Shin , 이상일 Sang Ill Lee |
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| Abstract |
| This study focused on the estimation of the effect of nickel(Ni) on the chronic ecotoxicity of water fleas. This study evaluated the species, Daphnia magna, Daphnia sp. and Moina macrocopa. During long term exposure to the nickel(Ni) the rates of growth, reproduction and transformation of each species were examined. Tests were carried out for over 21days for Daphnia magna and Daphnia sp. and over 10days for Moina macrocopa with concentrations ranging from 0, 1, 3, 5, 10 ug/L of nickel(Ni) in culture media. The survival rate of all three species decreased as nickel(Ni) increased in concentration. And the time required for initial reproduction of the water fleas was less in Moina macrocopa, followed by Daphnia sp. and Daphnia magna. However, reproduction time increased following higher concentrations of nickel(Ni) for each species. The total number of water fleas produced as well as their transformation rate during the test period also decreased. The size of the neonates was significantly smaller with the increase of toxic concentration. Base on the sensitivity to nickel(Ni) concentration, there are different characterizations of the test species for the toxicity assessment. Therefore, chronic toxicity tests with organisms representing different trophic groups should be supplemented in order to provide adequate level of environmental protection. |
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| Key Words |
| Daphnia magna, Daphinia sp. Moina macrocopa, Nickel, Chronic toxicity |
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