Laura Lundquist

(Missoula Current) Recent stream research shows that arctic grayling are going to need more protection to survive in the Big Hole River as summers continue to warm and drought dominates.

This fall, Zachary Hoylman, a Missoula researcher, collected and analyzed several years’ worth of stream and climate data from sites along the Big Hole River to learn what’s been happening to the river since 2017.

Hoylman, owner of Hydrosphere Analytical Laboratory, published his study in September and submitted it to the U.S. Fish and Wildlife Service, which is under a court order to publish a new decision by February 2027 on whether the Big Hole arctic grayling needs Endangered Species protection. Holyman also works as a research assistant professor and climatologist at the University

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