OVER 90% OF MAINE AQUACULTURE LANDED VALUE COMES FROM FARMED ATLANTIC SALMON. ONE ENVIRONMENTALLY DESTRUCTIVE FACTOR ASSOCIATED WITH SALMON AQUACULTURE ARE SEA LICE; PARASITES THAT ATTACH AND FEED ON A HOST'S FLESH, CAUSING SICKNESS AND SOMETIMES DEATH OF THE FISH. WIND, RIVER INFLOWS AND TIDES IN THE OCEAN ENVIRONMENT DISPERSE SEA LICE THROUGHOUT A REGION, INCREASING THE PROBABILITY OF INFECTION AT SOME FISH FARMS. AS RESISTANCE TO DRUG TREATMENTS INCREASES IN FARMED FISH, MANAGERS MUST RELY MORE ON NON-DRUG STRATEGIES TO MANAGE SEA LICE AT FARMS. IN THIS WORK, A DECISION SUPPORT SYSTEM PROVIDING FARMERS WITH A MEANS TO TRACK, VIEW, AND MANIPULATE RELEVANT WATER QUALITY INFORMATION TO MAKE INFORMED MANAGEMENT DECISIONS IN SITING AND TREATMENT OF SEA LICE IS DEVELOPED. IMPROVING INFORMATION TRANSFER AND DECISION-MAKING PROMOTES ECONOMIC INTEGRATED PEST MANAGEMENT PLANS WITH SOUND NON-DRUG COMPONENTS. THIS OBJECTIVE IS ACCOMPLISHED BY DEVELOPING A MODEL OF SEA LICE TRANSPORT ALONGTHE MAINE AND NEW BRUNSWICK COAST. THE PROPOSED LABORATORY EXPERIMENTS WILL REFINE THE SEA LICE BEHAVIORS MODELED. MODEL EXPERIMENTS WILL TEST DIFFERENT ENVIRONMENTAL CONDITIONS ON LICE SPREAD BETWEEN FARMS AND WILL BE DEVELOPED IN COLLABORATION WITH FARM MANAGERS. WITH THE DECISION SUPPORT SYSTEM DEVELOPED IN THIS PROJECT, MANAGERS WILL BE ABLE TO VISUALIZE HOW LARVAL SEA LICE MOVE FROM SITE-TO-SITE IN A REGION AND IMPACT LICE LEVELS AT NEARBY FARMS UNDER DIFFERENT OCEAN CONDITIONS.