Ethics approval and consent to participate
We declare that our experiments were performed in the respect of ethical rules. This protocol was approved by Department of Fisheries and Ocean Canada, Freshwater Institute Animal Care Committee Science Laboratories.

Funding

Funds are from Fisheries and Oceans Canada (DFO), Northern Development Canada Northwest Territories Cumulative Impacts Monitoring Program grants, Polar Continental Shelf Program, Sahtu Renewable Resource Board, and the Great Lakes Fishery Commission. Funding bodies had no role in the study design, in the collection, analysis and interpretation of data, in writing the manuscript or the decision to submit the paper for publication.