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Kelly McAlister from Johnston, Iowa, caught and released this 30-inch walleye while staying at Edgewood Resort on Long Lake. The fish succumbed to a nightcrawler, an exotic species unlawful to release on native soil, but a popular and legal bait for anglers statewide. (Jason Durham / For the Enterprise)

Fishing worms can spread exotic harm to trees

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Last week I received an interesting call from a researcher working for the University of Minnesota.

They explained that they wanted to ask five questions about exotic species and their role in fishing tournaments.


I agreed since the transport and spreading of invasive species is a big deal. I assumed we'd talk about weeds, zebra mussels, snails and other aquatic hitchhikers.

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