Report on Plains sucker (Pantosteus jordani), Rocky Mountain sculpin (Cottus sp.), western silvery minnow (Hybognathus argyritis), and stonecat (Noturus flavus) sampling conducted in 2020 in the Milk River... : Fs97-13/1330E-PDF

"In 2020, the failure of a diversion structure in Montana resulted in natural summer flows in the Milk River system in Canada. This has provided a rare opportunity to sample four federally or provincially listed species at risk during natural flow conditions in the North Milk and Milk rivers in southern Alberta. These species include: Plains Sucker (Pantosteus jordani), Rocky Mountain Sculpin (Cottus sp.), Western Silvery Minnow (Hybognathus argyritis), and Stonecat (Noturus flavus). Sampling conducted in August and October 2020 utilized recently developed standardized sampling methods developed by Fisheries and Oceans Canada with Alberta Environment and Parks to monitor the relative abundance and distribution of the four species. The sampling revealed that natural summer flows in the North Milk and Milk rivers of Alberta have not greatly impacted the distribution of Plains Sucker, Rocky Mountain Sculpin, and Stonecat. Western Silvery Minnow were not caught at any access points sampled in August and were only caught during a subsequent sampling trip in October near the United States border. Follow-up sampling is required to further assess the distribution of Western Silvery Minnow in Canada"--Abstract, page v.

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