중금속이 양서류 배아, 유생 및 성체에 미치는 영향에 관한 소고
Effects of Heavy Metals on Amphibian Embryos, Tadpoles, and Adults
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지구적으로 양서류가 감소하고 있다. 오래전부터 중금속은 양서류 군집 감소의 원인 중 한가지로 지목받고 있다. 수정 후 변태에 이르는 생활사를 수중에서 진행하는양서류는 수환경 내의 오염물질에 1차적으로 노출되며독성효과에 대한 감수성이 높아 수환경의 오염에 특히취약하다. 양서류는 수서생태계의 건강도 지표로서 유용할 뿐 아니라 분자 및 개체수준의 다양한 생체지표를이용한 다양한 환경오염물질의 독성평가 모델로서도 유용하다. 양서류에서 얻어진 독성자료는 수환경 오염물질의 관리와 안전관리기준으로 사용될 수 있다. 본 논문에서는 기존에 보고된 중금속이 양서류의 다양한 독성종말점에 미치는 영향들에 대해 검토하고 분석하였다.
Abstract
Amphibian population declines globally. Environmental contamination by heavy metals has been suspected to the one of the reason for distinction of amphibian which has obligate aquatic life style during larval period. Amphibians have been widely accepted as animal model for the study of endocrine disruption in aquatic ecosystem at molecular as well as individual levels. There are increasing need for toxicological data in amphibians at multiple endpoints for management of contamination and development of safety guidelines. Here, we reviewed toxicological information about toxicity of heavy metals (arsenic, cadmium, chromium, copper, lead, mercury, nickel, zinc) on various end-point of amphibian.
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