文章基本信息

标题：Lethal Effect Induced by Ultraviolet-B in a Planktonic Copepod: Role of the Post-Irradiation Time on Mortality Measurements
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作者：Marina P. Vega ; Ramn Pizarro
期刊名称：Journal of Freshwater Ecology
印刷版ISSN：0270-5060
电子版ISSN：2156-6941
出版年度：2000
卷号：15
期号：1
页码：1-5
DOI：10.1080/02705060.2000.9663716
出版社：Taylor & Francis
摘要：The vulnerability to UV-B radiation in Acanthocyclops robustus was analyzed in the laboratory. The LD 50 for adult individuals, determined by mortality one day after UV-B exposure was 40 μ Wcm -2 for 4 h exposure. A significant increase in the mortality of A. robustus adults was observed four days after exposure to UV-B irradiation. As a consequence, the estimated lethal dose at four days post-exposure was 20% less than that estimated two days after the exposure. These results indicate that because there is significant latent mortality during the post-irradiation period, accurate assessment of mortality due to UV-B exposure can only be made four days after the irradiation. Copepodite IV life stage individuals were much more sensitive to UV-B exposure than were the adults.