Creatures on the Wisconsin River are “pushing limits” at the age of 100, the state says.


one The oldest creature on the continent Found in the mud above Wisconsin Dam.

It’s a kind of mussel — a very large one, much like Idaho potatoes.

Mussels in eyeglass cases are known to have a long lifespan, but according to the Wisconsin Department of Natural Resources, a herd of at least a century ago was found on St. Croix Falls Dam.

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“Traditional mussels can live longer, but these mussels have pushed the boundaries,” Wisconsin DNR biologist Lisie Kitchel said in a news release.

“It was amazing to find a living fish, as the St. Croix Falls Dam, built in 1907, prevented the host fish species needed for breeding from landing upstream.”

Prior to this, ” The oldest documented eyeglass case According to the US Fish and Wildlife Service, he was considered 70 years old.

State biologists collected mussels in August with a team of experts from the University of Minnesota and the National Park Service. Age estimates were released on December 1, but officials said it was partly based on the time when the cluster was stuck on the dam.

Some shells from dead mussels are also collected on-site and “will be cross-sectioned this winter to confirm their age.”

Live mussels have been restored and measures are underway to “preserve genetic resources while alive,” the state said.

According to USFWS, spectacle case mussels are known for their elongated shells that can reach 9 inches. According to USFWS, these were once found in 14 states, but now only survive in 3 states.

According to experts, some of the challenges faced by endangered mussels may be dependent on the breeding of Hiodontiformes and Goldeye fish. Their larvae “must adhere to the gills and fins of certain fish and continue to grow into larval mussels before they fall,” the state states.

“These species are not present above the dam, but are found downstream. This means that breeding can occur downstream, and research reveals younger eyeglass cases downstream. It was done, “the state reports.

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