Sensitivity of juvenile freshwater crayfish Cherax destructor (Decapoda: Parastacidae) to trace metals

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• 作者：Shahnaz Khan ; Dayanthi Nugegoda
• 关键词：Cherax destructor ; Trace metals ; Toxicity testing ; 96-h LC₅₀ ; Cadmium ; Copper ; Nickel ; Iron
• 刊名：Ecotoxicology and Environmental Safety
• 出版年：2007
• 出版时间：November 2007
• 年：2007
• 卷：68
• 期：3
• 页码：463-469
• 全文大小：344 K

文摘

Juvenile Cherax destructor was investigated as a potential test species for toxicity testing of trace metals in Australian freshwater systems. Adult male and female C. destructor were bred in the laboratory to obtain 4-week old juveniles, which were used in the toxicity tests. Animals were exposed to a range of concentrations of the trace metals ions copper (377–1275 μg/L), cadmium (377–1275 μg/L), nickel (300–1013 mg/L) and iron (36–168 mg/L) in static-renewal 96-h bioassays. The 96-h LC₅₀ value for cadmium was 379, 494 μg/L for copper, 50 mg/L for iron and 327 mg/L for nickel demonstrating a decreasing toxicity of these metals to C. destructor. Comparison of LC₅₀ values for metals for this species with those for other aquatic organisms reveals that C. destructor is less sensitive to trace metals than most other tested species.