Combined toxicity of dissolved mercury with copper, lead and cadmium on embryogenesis and early larval growth of the Paracentrotus lividus sea-urchin.
作者： N. Fernández , R. BEIRAS
关键词: Cadmium 、 Paracentrotus lividus 、 Toxicology 、 Toxicity 、 Ecotoxicology 、 Incubation 、 Environmental chemistry 、 Bioassay 、 EC50 、 Mercury (element) 、 Biology
摘要: The individual and combined toxicity of dissolved mercury, copper, lead cadmium has been investigated by using the Paracentrotus lividus sea-urchin embryo-larval bioassay. Embryogenesis success early larval growth have recorded after incubation fertilised eggs in seawater, both with single metals binary combinations Hg every other metal. For ranking was > Cu Pb Cd, EC50 values 21.9, 66.8, 509 9240 μg/l, respectively. Lowest observed effect concentrations (LOEC) for were approximately three times lower than Hg, Pb, more two orders magnitude emphasizing danger underestimating when only lethal effects are recorded. Marking & Dawson's additive indices ranged from 0.10 to 0.19, indicating a slight trend synergism, which statistically significant Hg–Pb combination only. Hayes' within margins considered acceptable describe interactions.
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