Char is a key source of food for Inuit communities, and the Coppermine River supports an important subsistence char fishery for the community of Kugluktuk. The Kugluktuk Hunters and Trappers Organization (HTO) and community members have observed a decline in the fall run of migratory char, as well as changes in migration timing and locations. However, neither local fishers nor scientists know where char spawn and overwinter and the influence of climate on char migration is unknown. In 2017, to address these concerns and questions, the Swanson Lab at the University of Waterloo began a collaborative project with the Kugluktuk HTO and Fisheries and Oceans Canada, to study the migration patterns and overwintering habitat of Arctic char. In 2018 and 2019, we tagged 165 Arctic Char. Fish were caught by gill netting (checked every hour to minimize fish injury and mortalities) and angling. Tags that send out an acoustic signal were surgically implanted into fish. During the surgery, fish were immobilized with a TENS machine, which is commonly used in physiotherapy to relieve pain. Fish recover instantly when the TENS machine is turned off, so it is much faster than sedating fish using chemicals. We also do not use chemicals so fish can be safely consumed if they are caught by humans or wildlife when they are released. We installed acoustic receivers, which record when tagged fish pass by and provide information on the timing and location of char migration. Receivers were installed in the Coppermine River and the Coronation Gulf. We made anchors for the receivers by drilling holes in large rocks (at least 50 lbs) and adding metal anchor bolts. We used rocks instead of concrete to use natural materials whenever possible. The study revealed lots of interesting fish behaviour, which led to new questions from the community. To continue our research and answer these new questions, we propose to tag another 150 char using acoustic tags. Our study area is currently the Coppermine, Rae, Richardson, and Kugaryuak Rivers, as well as the nearby Coronation Gulf. We propose to add the Tree River, Nulahugyuk Creek (Bernard Harbour), Nakyoktok River (Richardson Islands), and Kimikyoak River (Reid Island) to the study area. The batteries in the new tags last for 10 years, so we propose to extend the project and deploy 75 acoustic receivers until 2032. Receivers will be checked twice a year to retrieve the data and make sure they are working properly. We will use the same methods that we used in the early years of the project, which have been approved by the Kugluktuk HTO and the many community members who have assisted with the project. This research project involves community members from Kugluktuk in all stages of the project, including planning, operations, assessment, and scientific publishing, and we will continue this close collaboration. The daily field crew will be four persons: 1-2 southern researchers and 2-3 community members. Most of the work will be done by small boat (16-20 feet). An ATV will be used to access sites in Kugluk Falls Territorial Park (accessed by ATV trail from Kugluktuk). A helicopter or small aircraft will be used for approximately 20 hours each year to reach remote, inland sites. For farther sites that are accessible by boat, a small temporary camp of four persons may be established for 1-2 nights each year.