The Dolphin and Union (DU) caribou herd (Rangifer tarandus groenlandicus x pearyi), locally referred to as Island caribou, is a unique and at-risk ecotype of caribou that ranges on Victoria Island and the adjacent mainland in the central Canadian Arctic. To facilitate the incorporation of traditional knowledge (TK) and better inform the required species recovery plan, we analyzed an archived set of TK interviews done in Ekaluktutiak and Kugluktuk, Nunavut, in 2003. The overarching theme throughout the interviews was that the DU caribou were dynamic, constantly adapting to the changing environment around them. Accounts provided previously unexplored connections between temporal and spatial trends in DU caribou distribution, population, ecology, and disease syndromes. Findings of fewer animals, range shift, and increased observations of disease in the late 1990s and early 2000s suggest that early signs of the declines that have resulted in the herd being reassessed as endangered today were already apparent to Kugluktukmiut in 2003. In contrast, Ekaluktutiakmiut were seeing a stable population. Shifts in caribou range and consequently harvesting ranges were described by both communities, but more evident in Kugluktuk. When combined, the differing accounts of the two communities provided a deeper understanding of caribou ecology and trends across seasons, years, and a broad spatial range. Community differences demonstrate the cruciality of considering unique place-based perspectives and the importance of mobilizing TK from communities and knowledge keepers throughout the caribou range for a herd-level understanding. This study highlights the importance of timely analyses and reporting on TK studies to ensure a nimble conservation response in a rapidly changing environment.

Indigenous knowledge provides valuable information on wildlife health and ecology, contributing to a broader understanding of the patterns and phenomena observed. Muskoxen (Ovibos moschatus), an important species for the subsistence and culture of Inuit communities in the Arctic, are increasingly exposed to diverse stressors linked to rapid climate change and other anthropogenic changes. Identifying and understanding these stressors and their impacts on muskoxen will inform management, health monitoring, and future research. To achieve this understanding, we documented Indigenous knowledge through seven semi-structured small group interviews, each involving two to three purposely chosen muskox harvesters in Kugluktuk, Nunavut, Canada to (1) establish the characteristics of healthy muskoxen, (2) determine the factors considered to impact muskoxen, and (3) understand, from an Indigenous knowledge perspective, the results from a study on the sex, seasonal, and annual patterns of glucocorticoids (described as “stress hormones” for the purposes of the interviews) in muskox hair. Key outcomes include (1) a more holistic understanding of muskox health and what it encompasses, (2) recognition and exploration of a rich One Health perspective expressed by participants around factors influencing muskoxen in a changing world and highlighting the multiple socioecological connections, and (3) a broader comprehension of the glucocorticoid (stress) patterns measured in muskox hair, the various factors that influence them, and their interrelations. This study represents a meaningful advancement in the process of actively involving communities at all steps of the research and highlights the important contributions Indigenous knowledge can offer to the complex field of wildlife endocrinology research.