Comments: In Canada, threats to persistence include fishing (now halted), predation by fish and seals, and natural and fishing-induced changes to the ecosystem; Cod in Arctic waters, which occur mostly in a few coastal salt lakes, are sensitive to human activities, and poorly regulated fishing is a potential threat (COSEWIC, May 2003, http://www.cosewic.gc.ca/htmlDocuments/Detailed_Species_Assessment_e.htm).