Heavy metal toxicity in Exosphaeroma gigas (Crustacea, Isopoda) from the coastal zone of Beagle Channel.
作者： Erica Giarratano , Laura Comoglio , Oscar Amin
DOI: 10.1016/J.ECOENV.2006.11.008
关键词: Environmental chemistry 、 Metal toxicity 、 Acute toxicity 、 Salinity 、 Bioaccumulation 、 Exosphaeroma 、 Zinc 、 Ecotoxicology 、 Biology 、 Cadmium
摘要: Abstract Acute toxicity of copper, cadmium, and zinc on isopod Exosphaeroma gigas was evaluated at 20‰ 30‰ salinity. Six concentrations were assayed to estimate effective concentration the toxicant that affects 50% tested animal (EC50), while physiological responses bioaccumulation determined 0.42 1.95 mg L −1 each metal. The following orders obtained: Cd⩾Cu>Zn salinity Cu>Zn⩾Cd Copper treatments showed a reduction in oxygen consumption salinity, an opposite trend observed Zinc caused dissimilar effects, cadmium significant only registered mg L . Ammonia excretion generally higher than control At did not change relation or diminished. In general terms, O:N atomic ratios indicated preponderant protein metabolism. Bioaccumulation metals lowest increased with increasing toxic concentrations.
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