Mercury, Arsenic, and Antimony in Aquatic Biota from the Middle Kuskokwim River Region, Alaska, 2010–2014

This report summarizes results and interpretation of mercury (Hg), arsenic (As), and antimony (As) concentrations in fish and aquatic insects collected in the Kuskokwim River and its tributaries between the Aniak and Stony rivers. It also summarizes the results and interpretation of mercury concentrations related to movements of northern pike (Esox lucius) and burbot (also known as lush) (Lota lota) throughout the watersheds of the middle Kuskokwim River, Alaska.