Brent Lewis, University of Waterloo (MSc Candidate), is studying Arctic Grayling in the Little Nahanni River watershed of southwestern Northwest Territories. His work will focus on Arctic Grayling occupancy throughout the Little Nahanni watershed in an effort to develop a broad-scale occupancy model for detecting Grayling in northern mountain streams. This model will link Grayling occupancy with environmental characteristics that are required for various life stages of Grayling development. Arctic Graylings are a top level predator in many northern stream ecosystems and often show sensitivity to various disturbances thereby indicating stream health. This research will help provide northern resource managers with the habitat and distributional data they require to monitor Grayling populations and report freshwater health in various local watersheds.