Effect of sublethal concentrations of copper on the critical thermal maxima (CTMax) of the fantail (Etheostoma flabellare) and johnny (E. nigrum) darters
1988; Elsevier BV; Volume: 12; Issue: 4 Linguagem: Inglês
10.1016/0166-445x(88)90059-8
ISSN1879-1514
AutoresMichael J. Lydy, Thomas E. Wissing,
Tópico(s)Insect Pheromone Research and Control
ResumoStatic 96-h copper LC50 values determined for fantail (Etheostoma flabellare) and johnny (E. nigrum) darters were used to determine ranges of copper concentrations for sublethal tests. LC50 values ranged from 330–392 μg · L−1 for fantail darters and 483–602 μg · L−1 for johnny darters. The CTMax method was used to determine the upper temperature tolerance of both species after a 96-h sublethal copper exposure. Copper exposure (concentrations above no-effect levels) for as little as three days significantly decreased the CTMax values for each species. A gradual increase in CTMax values was observed daily when fantail and johnny darters were removed from dosing water and placed into control water.
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