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Toxicity of zinc, cadmium and copper to the shrimpCallianassa australiensis. I. Effects of individual metals

✍ Scribed by M. Ahsanullah; D. S. Negilski; M. C. Mobley

Publisher: Springer-Verlag
Year: 1981
Tongue: English
Weight: 518 KB
Volume: 64
Category: Article
ISSN: 0025-3162
DOI: 10.1007/bf00393630

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✦ Synopsis

The acute toxicity of zinc, cadmium and copper to Callianassa australiensis (Dana) was evaluated in static tests. Each test lasted up to 14 d and LCso values were calculated for 4, 7, 10 and 14 d intervals. The toxicity of each metal increased with exposure time; thus the 4 d LCso values of 10.20, 6.33 and 1.03 mg 1-1 were considerably higher than the 14 d LCso values of 1.15, 0.49 and 0.19 mg 1-1 f3r zinc, cadmium and copper respectively. Toxicity curves reveal that none of the values were asymptotic, indicating that median lethal threshold concentrations were not reached for any of the metals. This suggests that 14 d is an insufficient time in which to complete meaningful, acute lethality tests for marine shrimps. Longer tests are necessary if lethal threshold concentrations are to be used with application factors to derive "safe" concentrations for the protection of C. australiensis.

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