AI Article Synopsis
- Laboratory tests on 1-year-old rainbow trout assessed their ability to detect and avoid copper and zinc after being exposed to various sublethal copper concentrations for 10 days, followed by a 10-day period in clean water.
- Results showed that the avoidance behavior of the trout decreased as the pre-exposure copper concentration increased, indicating a diminished response to toxic metals.
- After the re-acclimation period, the strength of the trout's avoidance response to copper and zinc improved, and this improvement followed a trend where higher concentrations of pre-exposure led to stronger avoidance reactions.
Article Abstract
Laboratory tests were conducted on 1-year-old rainbow trout Oncorhynchus mykiss in a counter-current flow, steep-gradient chamber to evaluate their ability to detect and avoid copper and zinc at concentrations of 0.1 mg Cu/L and 1 mg Zn/L, respectively, after 10-day pre-exposure to five copper sublethal concentrations ranging from 0.1 to 0.5 mg Cu/L and after 10-day re-acclimation period in clean water. Avoidance response intensity in affected fish significantly decreased with increase in pre-exposure Cu concentration. The strength of avoidance response to Cu and Zn test solutions in pre-exposed fish after re-acclimation gradually increased in a concentration-dependent order.
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| http://dx.doi.org/10.1007/s00128-011-0426-5 | DOI Listing |
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