A disinfection solution presently used for salmon eggs also prevents transmission of the virus that causes viral hemorrhagic septicemia or VHS -- one of the most dangerous viral diseases of fish -- in other hatchery-reared fish eggs, according to new U.S. Geological Survey-led research.

VHS has caused large fish kills in wild fish in the U.S., especially in the Great Lakes region, where thousands of fish have died from the virus over the last few years.  The disease causes internal bleeding in fish, and although in the family of viruses that includes rabies, is not harmful to humans. Thus far, the virus has been found in more than 25 species of fish in Lakes Michigan, Huron, Erie, St. Clair, Superior and Ontario, as well as the Saint Lawrence River and inland lakes in New York, Michigan and Wisconsin.

Effective disinfection methods are critically important to natural resource agencies that collect eggs from wild fish stocks and private aquaculture because the spread of the virus to a fish hatchery could be devastating, said Mark Gaikowski, a USGS researcher who led the USGS and U.S. Fish and Wildlife Service research team.

“If VHS virus is introduced into the aquaculture industry, it could lead to trade restrictions, as well as direct economic losses from the disease,” Gaikowski noted. 

USGS and USFWS researchers tested the effectiveness of using iodophor disinfection in walleye and northern pike eggs and found that it eliminated active virus from fertilized eggs. Iodophor disinfectant solutions contain iodine formulated for use on fish eggs.  The researchers also found that although some of the disinfection treatments reduced hatch, iodophor treatment at 90 minutes after fertilization occurred did not alter egg hatch or fry development.

Experts fear the disease could potentially spread from the Great Lakes into new populations of native fish in the 31 states of the Mississippi River basin. Regulatory agencies in the United States and Canada have already placed restrictions on the movement of fish or fish products that could pose a risk for the spread of VHS virus to regions outside of the known geographic range.

For more information about this subject, as well as recommendations on the disinfection process, see the new USGS Fact Sheet online. Funding for this research was provided by the USGS and the North Central Regional Aquaculture Center from the U.S. Department of Agriculture Cooperative State, Research, Education and Extension Service. The iodine used during egg disinfection was donated by Western Chemical Inc, Ferndale, Washington.

In a fiscally responsible budget that emphasizes cost containment, management efficiencies and program savings, the President's proposed $1.1 billion budget for the U.S. Geological Survey (USGS) in fiscal year 2011 reflects his commitment to use science as the basis for natural resource management decisions.

"Science is a cornerstone for sound decision making," said Marcia McNutt, USGS director. "Today's complex, interrelated natural resource issues—such as climate change, energy conservation and development, and water quality and availability—demand that policy makers and managers start with timely, unbiased science. The President’s budget supports that vital perspective."

Because of the significant role USGS plays in climate change monitoring and adaptation, energy, ecosystems, and other priorities, the 2011 budget represents an increase of $21.6 million from the FY 2010 enacted level. Major USGS program increases proposed are summarized below. For more detailed information on the President’s proposed USGS FY 2011 budget, visit the FY 2011 Budget and Related Information Web site.

New Energy Frontier
$3.0 million

The USGS will work closely with Department of the Interior bureaus to provide the scientific information needed to make decisions concerning permitting, implementing, and operating wind facilities on public lands by using USGS research, modeling, and monitoring to assess the ecological impacts to fish and wildlife. In 2011, USGS efforts will begin in the Great Plains and offshore Cape Cod region and will work toward developing an assessment methodology that can be applied nationwide.

Climate Change Adaptation
$11.0 million

Management and policy decisions made in response to climate change impacts must be informed by science. The USGS will continue to assist the Department of the Interior in the development of regional climate science centers that provide climate change impact data and analysis geared to the needs of the fish and wildlife management community, in partnership with other Federal, State, university and other non-governmental partners. Additionally, the USGS will continue to assess biological carbon sequestration options and develop decision-support tools through the USGS Global Change program.

WaterSMART
$9.0 million

Water shortages and water-use conflicts have become more commonplace in many areas of the United States. Water is essential to the economic security of individual communities and the economic vitality and environmental health of our nation as a whole. The USGS will begin an assessment of the availability and use of water resources in the United States in FY 2011. The information will provide tools to address a new set of water resource challenges, including aging infrastructure, rapid population growth, depletion of groundwater resources, water quality impairments associated with land uses, and climate variability.

Treasured Landscapes: The Chesapeake Bay
$3.6 million

President Obama issued an Executive Order in May 2009 directing Federal agencies to use their expertise and resources to protect and restore the Chesapeake Bay and its watershed. The USGS will support restoration strategies by providing tools and science for assessing climate change impacts and adaptation, for conserving landscapes, and for restoring habitats, fish and wildlife, in partnership with the Fish and Wildlife Service and the National Park Service.

Increasing Resilience to Natural Hazards
$4.0 million

The USGS Multi-Hazards Demonstration Project in Southern California will continue to support emergency planning by developing earthquake early warning capabilities and conducting impact analysis of environmental, human-health and ecosystem responses to earthquakes and other hazards. This project will be expanded into the coastal communities of Alaska, and the USGS will invest in earthquake, tsunami and volcano science to support community planning in the Pacific Northwest. Additionally, the USGS proposes to add a volcanic earthquake detection role to the USGS National Earthquake Information Center, which will provide critical early warning to give observatories and affected communities time to plan and prepare for an eruption.

Landsat Data Continuity
$13.4 million

Scientists, educators and the general public around the globe use USGS Landsat data for a wide array of activities ranging from supporting disaster relief efforts to making agricultural crop assessments to identifying sites for cell phone towers. The USGS will accommodate ground-system requirement changes for the Landsat Data Continuity Mission associated with moving the Operational Land Imager to a free-flying satellite and the addition of a Thermal Infrared Sensor on board the spacecraft. These activities are required to meet the mission launch in December 2012.

Coastal and Marine Spatial Planning
$4.0 million

The Department of the Interior has substantial coastal and ocean resource management responsibilities and a critical role in implementing the Administration's National Ocean Policy. USGS mapping, monitoring and research provide information to assess the status and vulnerability of ocean, coastal and Great Lakes resources. The USGS will engage with other Department of the Interior bureaus and Federal agencies to make available an information framework that provides critical information for coastal and marine planning.