Journal Title
Title of Journal: Arch Environ Contam Toxicol
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Abbravation: Archives of Environmental Contamination and Toxicology
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Publisher
Springer-Verlag
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Authors: Daiani Kochhann Ana Paula S Benaduce Carlos E Copatti Karina R Lorenzatto Márcia F Mesko Érico M M Flores Valderi L Dressler Bernardo Baldisserotto
Publish Date: 2009/02/17
Volume: 56, Issue: 4, Pages: 770-775
Abstract
The objective of the present study was to analyze the effect of chronic cadmium Cd exposure at two alkalinity levels 63 and 92 mg l−1 CaCO3 on the antipredatory behavior of juvenile silver catfish Rhamdia quelen exposed to conspecific skin extract and predator odor At an alkalinity of 63 mg l−1 CaCO3 30 days of exposure to either 45 or 80 μg l−1 Cd impaired the catfish’s antipredatory response to alarm cues However silver catfish exposed to 45 μg l−1 Cd at an alkalinity of 92 mg l−1 CaCO3 responded to skin extract and predator odor In catfish exposed to 80 μg l−1 Cd at the same alkalinity only the number of feeding bites decreased and this occurred only for specimens exposed to predator odor Our results show that higher alkalinity protected against the deleterious effects of Cd on alarm cue detection but only in the larvae exposed to the lowest waterborne Cd levelThe authors thank Richard P Brinn from Florida International University for critical review of the manuscript B Baldisserotto and D Kochhann respectively received research and undergraduate fellowships from Conselho Nacional de Desenvolvimento Tecnológico The authors are also thankful to Coordenação de Aperfeiçoamento de Pessoal de Nível Superior for financial support
Keywords:
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