Aquatic organisms are subject to a number of stressors from natural (temperature, etc) and anthropogenic origins (pesticides, etc). Natural stressors may amplify the effects of contaminants and increase an organism’s sensitivity to them. This study sought to examine how predatory cues (kairomones & alarm cues) affect copper tolerance in the mosquitofish, Gambusia affinis . Fish metabolic rate was evaluated to gain insight on any interactive effects between predatory cues and copper. Paired 96-h toxicity tests with copper and predatory cue and with copper alone were conducted to determine the influence of predatory cues on G. affinis metal sensitivity. In the presence of alarm cue neither G. affinis copper tolerance or metabolic rate was altered. At copper concentrations ranging from 0.25mg Cu/L - 0.50mg Cu/L kairomone presence had no influence on survival, while between 0.50mg Cu/L and 1.0mg Cu/L, kairomone presence increased survival. Kairomone had no significant effect on metabolic rate.
|Advisor:||Bidwell, Joseph R.|
|Commitee:||Alsop, Fred, Bidwell, Joseph, Joplin, Karl|
|School:||East Tennessee State University|
|School Location:||United States -- Tennessee|
|Source:||MAI 58/04M(E), Masters Abstracts International|
|Keywords:||Alarm cues, Copper toxicity, Gambusia affinis, Kairomones, Metabolic rate|
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