Fish virus in Northeast spreading to other fish species ( tic testing. This technique can take t...)

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Fish virus in Northeast spreading to other fish species

tic testing. This technique can take two to four weeks to yield results. Cornell researchers are developing a molecular-based test for VHSV based on a specific gene sequence in the virus. Once available, the new technique will cut the turnaround for confirmation to three to five days.

Groocock said the high number of dead fish reported recently may be due to the increased presence of vacationers on the lakes in summer, as well as the increased awareness since reports of mortalities earlier in the season. Also, recent storms and heavy winds may have washed up more fish from deeper waters. Groocock added that while more species of fish are dying, absolute numbers of fish mortalities do not appear to be changing.

"There is no cure for VHSV in fish in an ecosystem as large as the Great Lakes Basin. Given this, it is likely that management practices designed to limit the spread of the virus will be put in place," said Groocock.

Although no management decisions have yet been made, the DEC could recommend that boaters clean their boats before traveling from one body of water to another and not dump bait minnows into open water after a day of fishing.

VHSV was first reported in 1988 in the United States in spawning salmon in the Pacific Northwest. It was reported in North American freshwater fish in 2005 in muskellunge in Lake St. Claire, Mich., and in freshwater drum from the Bay of Quinte, Lake Ontario, Canada.

Source:Cornell University News Service

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