Scientific solutions to reduce the impact of viral hemorrhagic septicemia virus on Great Lakes walleye

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The purpose of this proposal is provide immediately usable strategies to reduce the impact of viral hemorrhagic septicemia virus (VHSV) and at the same time generate novel tools and information in walleye, a highly valuable commercial species in the Great Lakes region. VHSV has long been associated with the European aquaculture industry but wasn't recognized in the freshwaters of North America until the spring of 2005 when a large-scale mortality event in freshwater drum occurred in Lake Ontario. Subsequently the causative virus was shown to be a novel strain of VHSV, unlike other North American or European strains. Mortality events in several species have continued in 2006/07. The discovery of this virus has had an immediate impact on fisheries management in central Canada. International and domestic regulations put in place to slow the spread