Large numbers of dead fish are reported in Lake Macatawa

Dead fish from Lake Macatawa in Holland County, Michigan. The confirmed cause of these fish kills is viral hemorrhagic septicemia. (Courtesy of Michigan DNR)

HOLLAND, Mich. (WOOD) — Large amounts of dead fish are being reported in Lake Macatawa near Holland.

The Michigan Department of Natural Resources reports that the fish are found near the outlet channel of Lake Macatawa. Reports on the DNRs Eyes in the field An online reporting app has been available since mid-April.

Experts believe the die-off is due to the virus responsible for viral hemorrhagic septicemia (VHS). The pathogen was first reported in the Great Lakes in 2005, but it can take years without causing problems.

“It’s not really an everyday occurrence. It’s a pathogen that’s kind of hiding,” said Ed Eisch, deputy chief of the Michigan DNR’s fisheries division. “It’s here and we’ll never lose it, we know that, but it’s hiding somehow. We won’t see it for several years in a row and then all of a sudden it pops up.”

VHS is highly contagious and affects more than 40 species of fish, many of which are important in the recreational fishing world.

“The main species affected by this particular outbreak is the freshwater drum, or sheepshead as they are sometimes called. We also saw a number of shad die from it, a small number of catfish and even fewer walleyes,” Eisch explained.

Fortunately, the virus does not affect warm-blooded animals, so there is no need for concern for people or pets who come into contact with water containing VHS.

“The biggest concern is that the virus may be transmitted from one body of water to another,” Eisch said.

The pathogen is transmitted by boats or fishing gear that come into contact with VHS in the water. That’s why Eisch said it’s important for people to clean and disinfect their equipment before moving to a new body of water. This also applies to boats and trailers.

VHS is not typically active in water above 59 degrees, so Eisch doesn’t believe it is actively causing more fish kills. Still, he said it was important for people to be aware.

“People should always be vigilant and aware that every time they transport their boat, trailer or equipment from one body of water to another, there is a risk of transmitting pathogens or aquatic invasive species, So you should always keep the water clean.” drain and dry in the head.”

The public is also encouraged to do so Report sick or dying wildlife to the Michigan DNR.