Species at Risk
Research
There has been a dramatic decline in freshwater fish biodiversity globally, and this is true in Canada as well. Losses of freshwater fishes have important consequences to Canadians. Freshwater fish provide forage for other biota, drive ecosystem properties, and are indicators of aquatic ecosystem health. We study the declines of freshwater fishes, including species like: Arctic Grayling, Athabasca Rainbow Trout (Endangered), Bull Trout (Special Concern), Carmine Shiner (Threatened), Lake Sturgeon (Saskatchewan River, COSEWIC: Endangered), Plains Sucker (Milk River Population - Threatened), Redside Dace (Endangered), Rocky Mountain Sculpin (Eastslope Population - Endangered), Western Silvery Minnow (Threatened), Westslope Cutthroat Trout (AB Population - Threatened), among many others. Click on the species photos, articles or news items to learn more about some of the research we are conducting on species at risk! Note: * Lab members.
Articles from Lab

Veillard, M., Watkinson, D. and M. S. Poesch. (2026). Biotic and abiotic factors and their interaction influence the seasonal movement patterns of a dispersal limited benthic species. Environmental Biology of Fishes 109:86.

Pallard J., Jardine, T. and M. S. Poesch. (In Press) Altered resource use by threaten Bull Trout (Salvelinus confluentus) amid competition from two non-native salmonids. Journal of Fish Biology.

Tierney K. B., Smith J., Veillard M., Steffler M. V. and M. S. Poesch. (2025). Subpopulations of an imperilled freshwater fish shows behavioral adaptation that informs survival in the Anthropocene. Canadian Journal of Fisheries and Aquatic Science 82:1-10.

Pallard J. and M. S. Poesch. (2025) Factors affecting Bull Trout (Salvelinus confluentus) abundance and potential displacement by non-native Brook Trout (Salvelinus fontinalis) and Brown Trout (Salmo trutta) in headwater streams. Aquatic Conservation: Marine and Freshwater Ecosystems 35(9): e70227.

Theis, S.* Castellanos D.A., Hamann A. and M.S. Poesch. (2023) Small-bodied fish species from western United States will be under severe water stress by 2040. Conservation Science and Practice: e12856.
News from the Lab

Brazil Trip with tracking change (Blog posts from Dr. Mark Poesch)

Dr. Poesch gives presentation on impacts of Prussian Carp to freshwater fishes at the Alberta Invasive Species Council meeting in LaCombe, AB.

The Fisheries and Aquatic Conservation Lab attends the Canadian Science Advisory Meeting on Offsetting in Ottawa










