State agencies advise decontamination with discovery of ‘rock snot’ cells in the Au Sable River

The Au Sable River in Oscoda County, Michigan. | Kyle Davidson

The Michigan Department of Natural Resources (DNR) is urging anglers and paddlers to decontaminate their wader, watercraft and kit after didymo cells have been detected in algae samples taken from the Au Sable River. 

Didymo, also referred to as rock snot. | Michigan Department of Natural Resources

In late April, Michigan Trout Unlimited, a conservation group centered on defending coldwater fisheries, discovered a number of didymo cells in a pattern taken at the Parmalee Canoe Launch in Oscoda County, and one cell in a pattern taken downstream at the Whirlpool Canoe Launch in Mio. No proof of didymo was discovered upstream or additional downstream in different tributaries sampled.

Didymo, also referred to as “rock snot,” is a kind of algae that thrives in chilly, low-nutrient streams. Under sure circumstances the cells can kind intensive stalks or blooms, creating thick mats that cowl stream beds and scale back habitats for species like mayflies, caddisflies and stonefly nymphs, that are essential meals sources for fish.

While no blooms have been discovered at both entry web site, Michigan Trout Unlimited, alongside the DNR and the Department of Environment, Great Lakes and Energy (EGLE), are advising anybody utilizing the stream to wash their boats and gear between each go to to keep away from spreading the algae.

“With trout season now open across the state and paddle sports gearing up for the summer, it’s important to remind everyone enjoying Michigan’s streams and rivers to take steps to decontaminate to prevent further spread of didymo and aquatic invasive species,” Bryan Burroughs, govt director of Michigan Trout Unlimited. mentioned in an announcement.

According to an announcement from the DNR, didymo is believed to be native to sure components of the Great Lakes Basin, however the extent is unknown. Didymo blooms are sporadic and don’t persist by way of the complete 12 months or each fishing season, nonetheless DNR urges vigilant decontamination efforts to cut back hurt to streams. 

Efforts to know the extent and conduct of the algae in Michigan waters are ongoing. 

  • The DNR advises anybody exiting waters in the state to pack a scrub brush, towels and chemical disinfectant for after they exit the waters, and to wash, drain and dry gear between journeys or earlier than transferring to a brand new physique of water. 

  • Michigan Trout Unlimited’s pamphlet “Stopping the Spread of New Zealand Mudsnails” additionally offers steering on decontaminating gear utilizing a spread of strategies. 

  • The DNR additionally advises anybody who encounters didymo in new places to {photograph} it and submit a report utilizing the Eyes in the Field online reporting system. 


The submit State agencies advise decontamination with discovery of ‘rock snot’ cells in the Au Sable River appeared first on Michigan Advance.

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