Across the Canadian North, Arctic Char, Salvelinus alpinus, are culturally important and critical for maintaining subsistence lifestyles and ensuring food security for Inuit. Arctic Char also support economic development initiatives in many Arctic communities through the establishment of coastal and inland commercial char fisheries. The Halokvik River, located near the community of Cambridge Bay, Nunavut, has supported a commercial fishery for anadromous Arctic Char since the late 1960s. The sustainable management of this fishery, however, remains challenging given the lack of biological data on Arctic Char from this system and the limited information on abundance and biomass needed for resolving sustainable rates of exploitation. In 2013 and 2014, we enumerated the upstream run of Arctic Char in this system using a weir normally used for commercial harvesting. Additionally, we measured fish length and used T-bar anchor tags to mark a subset of the run. Subsequently, we estimated population size using capture-mark-recapture (CMR) methods. The estimated number of Arctic Char differed substantially between years. In 2013, 1967 Arctic Char were enumerated whereas in 2014, 14,502 Arctic Char were enumerated. We attribute this marked difference primarily to differences in weir design between years. There was also no significant relationship between daily mean water temperature and number of Arctic Char counted per day in either year of the enumeration. The CMR population estimates of Arctic Char (those ≥450mm in length) for 2013 and 2014 were 35,546 (95% C.I 30,513-49,254) and 48,377 (95% C.I. 37,398-74,601) respectively. The 95% CI overlapped between years, suggesting that inter-annual differences may not be as extreme as what is suggested by the enumeration. The population estimates reported here are also the first estimates of population size for an Arctic Char stock in the Cambridge Bay region using CMR methodology. Overall, the results of this study will be valuable for understanding how population size may fluctuate over time in the region and for potentially providing advice on the sustainable rates of harvest for Halokvik River Arctic Char. Additionally, the results generated here may prove valuable for validating current stock assessment models that are being explored for estimating biomass and abundance for commercial stocks of Arctic Char in the region.

PURPOSE:Given the paucity of information on Arctic char along western Hudson Bay, in 2018, Fisheries and Oceans Canada (DFO) hosted an Arctic char workshop in Rankin Inlet, Nunavut, bringing together local resource users, knowledge holders, and co-management groups (e.g., Hunters and Trappers Organizations, Regional Wildlife Organization) to identify and discuss community-based Arctic char research priorities across the Kivalliq region of Nunavut. Communities were especially interested in examining “what Arctic char were eating” and “why the colour of their muscle is different” along the western Hudson Bay coastline, and in the summer of 2018, a regional community-based Arctic char monitoring program was implemented across the region. DESCRIPTION:Climate-induced alterations to Arctic sea ice dynamics are influencing the availability and distribution of resources, and in turn, the nutrient and energy intake of opportunistic predators across the food web. These temporal changes in local prey communities likely influence the availability of carotenoid-rich prey types, as well as the foraging ecology of opportunistic predators that forage in the marine environment, such as anadromous Arctic char (Salvelinus alpinus). Despite its socioeconomic importance across its range, anadromous Arctic char foraging ecology and its influence on muscle pigmentation, particularly in relation to sea ice dynamics, remains understudied. Here, over two years (2021, 2022) with contrasting sea ice dynamics, we investigated the foraging ecology of anadromous Arctic char and its influence on their muscle pigmentation at a southern (Rankin Inlet) and northern (Naujaat) location along western Hudson Bay using a combination of stomach contents, stable isotopes (δ¹³C and δ¹⁵N), highly branched isoprenoids, carotenoid spectrophotometry, and a standard muscle colour scale (DSM SalmoFan). Spatiotemporal variation in Arctic char diet occurred, where Rankin Inlet Arctic char generally consumed more fish and phytoplankton-based carbon sources, occupied a higher trophic position, and displayed a similar isotopic niche breadth compared to Arctic char in Naujaat. Invertebrates were higher in carotenoid concentration than fishes, and in association with a more invertebrate-based diet, Arctic char in Naujaat contained higher muscle carotenoid concentrations (e.g., astaxanthin) compared to Rankin Inlet Arctic char in 2021. In 2022, however, muscle carotenoid concentrations in Naujaat and Rankin Inlet Arctic char were more similar, as the diet of Arctic char in both locations was largely fish-based despite muscle colour remaining redder in Naujaat Arctic char. Overall, the observed plastic foraging ecology of Arctic char highlights this species' ability to adjust to inter-annual variability in environmental changes, which then impacts their muscle carotenoid concentration. Such inter-annual variation in Arctic char foraging ecology is anticipated to increase with unpredictable climate-driven environmental changes in the region, which could therefore negatively affect local resource users over the long term, resulting in socioeconomic impacts across the Arctic.Collection/sampling methodology:Arctic char were collected by angling and gillnetting (5.5” mesh, regularly checked) between June and August in the estuarine and marine environments near the communities of Rankin Inlet and Naujaat, Nunavut. In 2021, Naujaat Arctic char were collected by community fishers as part of a community-based sampling program. Concurrently, invertebrate prey types were opportunistically collected in the vicinity of Arctic char sampling sites using a conical zooplankton net (200-μm mesh; 10-minute tows) or obtained fresh from Arctic char stomachs. Additionally, marine fishes were opportunistically collected by angling or obtained fresh from Arctic char stomachs over both years in Rankin Inlet, while samples from the Naujaat area were collected in 2018 and 2019.The Kivalliq Wildlife Board (Rankin Inlet, NU) and Arviq Hunters and Trappers Association (Naujaat, NU) each supported this community-formulated research project and assisted with sample collections throughout the duration of the project. We would like to recognize and thank Sonny Ittinuar (Kivalliq Wildlife Board/Rankin Inlet Local Resource User), Clayton Tartak (Kivalliq Wildlife Board), Vincent L’Herault (ArctiConnexion), and Gail Davoren (University of Manitoba MSc co-supervisor) for their participation in the project. We would also like to thank Sonny Ittinuar, Poisey (Adam) Alogut, John-El, Peter, Quassa, and Goretti Tinashlu, who assisted in field work. USE LIMITATION:To ensure scientific integrity and appropriate use of the data, we would encourage you to contact the data custodian.

Commercial and exploratory fisheries for Arctic Char, Salvelinus alpinus, provide significant economic opportunities for Nunavummiut in several Nunavut communities. Having an accurate understanding of the weight of the Arctic Char that are harvested is important for tracking harvest and for understanding how biological parameters may be changing over time as a result of exploitation and/or climactic and environmental changes. Unfortunately, most fish enter the processing plants as dressed (gills and viscera removed) and therefore conversion factors have to be applied to reconcile whole (round) weight from dressed weight. Here, we provide an updated conversion factor based on linear regression for Arctic Char from the Halokvik River (locally known as 30 Mile) near the community of Cambridge Bay. This conversion factor can be used moving forward as the Halokvik River continues to be commercially harvested.

Polygonal layer of public parking lots on the territory of the city of Shawinigan.[Link to the complete Isogeo sheet] (https://open.isogeo.com/s/b6da64af30234cbda2afed3972a5fc3e/Urd8YxfJdWSzGaUmhHFMY60vx14s0/r/2046d9f1f3034b3cac62ad11ec6c40cf?lock)! [Shawinigan logo] (https://jmap.shawinigan.ca/doc/photos/LogoShawinigan.jpg)**Collection method**Location at the corresponding address**Attributes*** `objectid` (`integer`): * `number` (`char`): Number* `name` (`char`): Name* `location` (`char`): Location* `nb_place_24_hrs` (`integer`): Number of seats 24 hours* `disabled` (`char`): Disabled* `vignette` (`char`): Thumbnail* `regulation` (`char`): Regulation* `terminal_electric` (`char`): Electrical terminal* `nb_place_2_hrs` (`integer`): Number of seats 2h* `reserve_electrique` (`char`): For electric cars only* `st_area (shape) `(`double`): * `st_length (shape) `(`double`): * `duration` (`char`): **This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Linear layer of the bicycle network of the City of Shawinigan.! [Shawinigan logo] (https://jmap.shawinigan.ca/doc/photos/LogoShawinigan.jpg)**Collection method** Scanning from orthophotography**Attributes*** `objectid` (`integer`): * `type` (`char`): Type* `surface` (`char`): Surface* `status` (`char`): Status* `length` (`double`): Length* `st_length (shape) `(`double`): Length* `annee_resurfacage` (`char`): Resurfacing year* `velobouclemauricie` (`char`): Veloloop Mauricie* `greenroute` (`char`): Green roadFor more information, consult the metadata on the Isogeo catalog (OpenCatalog link).**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Linear layer of the bicycle network of the City of Shawinigan.[Link to the complete Isogeo sheet] (https://open.isogeo.com/s/b6da64af30234cbda2afed3972a5fc3e/Urd8YxfJdWSzGaUmhHFMY60vx14s0/r/03617e6934ea47fc8cbb86031835d060?lock)! [Shawinigan logo] (https://jmap.shawinigan.ca/doc/photos/LogoShawinigan.jpg)**Collection method**Scanning from orthophotography**Attributes*** `objectid` (`integer`): * `type` (`char`): Type* `surface` (`char`): Surface* `status` (`char`): Status* `length` (`double`): Length* `st_length (shape) `(`double`): Length* `annee_resurfacage` (`char`): Resurfacing year* `velobouclemauricie` (`char`): Veloloop Mauricie* `greenroute` (`char`): Green road**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Point layer of municipal sports infrastructures (indoor and outdoor) in the City of Shawinigan.[Link to the complete Isogeo sheet] (https://open.isogeo.com/s/b6da64af30234cbda2afed3972a5fc3e/Urd8YxfJdWSzGaUmhHFMY60vx14s0/r/5d3ef8082c78491d879dd558f93c4416?lock)! [Shawinigan logo] (https://jmap.shawinigan.ca/doc/photos/LogoShawinigan.jpg)**Collection method**Scanning from orthophotography**Attributes*** `objectid` (`integer`): * `sport` (`char`): Sport* `name` (`char`): Name* `address` (`char`): Address* `url` (`char`): URL* `photo` (`char`): Picture* `photo_360` (`char`): 360° photo* `sector` (`char`): Sector* `notes` (`char`): Notes**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Point layer of bus stops of the Régie de transport en public de Shawinigan (RTCS) on the territory of the city of Shawinigan.[Link to the complete Isogeo sheet] (https://open.isogeo.com/s/b6da64af30234cbda2afed3972a5fc3e/Urd8YxfJdWSzGaUmhHFMY60vx14s0/r/49098b82915f46389fe6b14424513da5?lock)! [Shawinigan logo] (https://jmap.shawinigan.ca/doc/photos/LogoShawinigan.jpg)! [RTCS logo] (https://jmap.shawinigan.ca/doc/photos/RTCS-Copie.jpg)**Collection method**Location at the corresponding address**Attributes*** `objectid` (`integer`): * `direction` (`char`): Direction* `shuttle` (`char`): Shuttle* `hcar_a` (`char`): Express A* `hcar_b` (`char`): Express B* `hcar_n` (`char`): Shuttle 1* `h_nw` (`char`): Shuttle 2* `address` (`char`): Address* `sequence_a` (`integer`): ID Stop* `shelter` (`char`): Bus shelter* `mob_reduit` (`char`): Access to reduced mobility* `latitude` (`double`): Latitude* `longitude` (`double`): Longitude* `notes` (`char`): Notes**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Point layer of bus access stops of the Shawinigan Public Transport Board (RTCS) on the territory of the city of Shawinigan.[Link to the complete Isogeo sheet] (https://open.isogeo.com/s/b6da64af30234cbda2afed3972a5fc3e/Urd8YxfJdWSzGaUmhHFMY60vx14s0/r/f72cba67662b4b289105b52c5b7d412c?lock)! [Shawinigan logo] (https://jmap.shawinigan.ca/doc/photos/LogoShawinigan.jpg)! [RTCS logo] (https://jmap.shawinigan.ca/doc/photos/RTCS-Copie.jpg)**Collection method**Location at the corresponding address**Attributes*** `objectid` (`integer`): * `zones` (`char`): Area* `address` (`char`): Address* `coin_rue` (`char`): Street corner* `abri_bus` (`char`): Bus shelter* `embarkation` (`char`): Boarding number**This third party metadata element was translated using an automated translation tool (Amazon Translate).**

Point layer of points of sale of transport tickets of the Régie de transport en public de Shawinigan (RTCS) on the territory of the city of Shawinigan.[Link to the complete Isogeo sheet] (https://open.isogeo.com/s/b6da64af30234cbda2afed3972a5fc3e/Urd8YxfJdWSzGaUmhHFMY60vx14s0/r/f35f1bb99a9c430d8debf488453a4202?lock)! [Shawinigan logo] (https://jmap.shawinigan.ca/doc/photos/LogoShawinigan.jpg)! [RTCS logo] (https://jmap.shawinigan.ca/doc/photos/RTCS-Copie.jpg)**Collection method**Location at the corresponding address**Attributes*** `objectid` (`integer`): * `name` (`char`): Name* `address` (`char`): Address**This third party metadata element was translated using an automated translation tool (Amazon Translate).**