SS1.01 Assessing Potential Environmental Impacts of Aquaculture
Date: Thursday, June 13, 2002
Location: Poster Session - VCC
 
GaikowskiMP, U.S. Geological Survey (USGS), Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin, USA, mark_gaikowski@usgs.gov
Schmidt, L, J, USGS, Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin, USA, larry_schmidt@usgs.gov
Stehly, G, R, USGS, Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin, USA, guy_stehly@usgs.gov
Larson, W, J, USGS, Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin, USA, wendi_larson@usgs.gov
Gingerich, W, H, USGS, Upper Midwest Environmental Sciences Center, La Crosse, Wisconsin, USA, william_gingerich@usgs.gov
 
AN EVALUATION OF POTENTIAL ENVIRONMENTAL FATE AND EFFECTS OF CHLORAMINE-T USE IN U.S. INTENSIVE AQUACULTURE.
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U.S. Food and Drug Administration (FDA) approval is currently being sought for the use of chloramine-T as a waterborne therapeutant in aquaculture to control mortality associated with bacterial gill disease in cultured freshwater fish. We reviewed and characterized potential impacts, and environmental fate and effects of chloramine-T discharge into freshwater ecosystems after aquaculture use. The review represents only a portion of the FDA requirements to assess environmental safety. Our risk characterization integrates 1) available fate and effects data, 2) a recent USGS survey that detailed the projected use and discharge patterns of chloramine-T at U.S. aquaculture facilities, and 3) chloramine-T effluent monitoring following typical production raceway treatments. We modeled potential environmental effects of chloramine-T based on estimated environmental introduction concentrations (EIC) because of the lack of available degradation data and because chloramine-T may be regarded as total residual chlorine (TRC). Available data suggest that chloramine-T is much less toxic than TRC.