A Continuous Flow Bioassay Method to Evaluate the Effects of Outboard Motor Exhausts and Selected Aromatic Toxicants on Fish
نویسنده
چکیده
Abstraet--A continuous tlow bioassay system was designed to measure the effects of outboard motor exhaust (OME) emissions and selected volatile and evaporative aromatic toxicants on goldfish (Carassitts auratus). Continuous flow bioassays were run for 24, 48, 72. 96. and 720h to determine lethal concentrations for 50y.~, of individuals (LC-50"s) for leaded OME, non-leaded OME. toluene, xylene, and 1.3,5 trimethylbenzene, the three individual compounds having been identified as significant aromatic components of OME. The 96h LC-50's for these substances were found to be 171, 168. 23, 17, and 13 ppm, respectively. The values of 171 and 168 ppm for the two OME's are given in terms of gallons of fuel burned per million gallons of water. The continuous flow bioassay method was demonstrated to be a more r~liable indicator of the effects of OME pollutants on aquatic organisms than is the static bioassay method.
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