The Alaska Fisheries Science Center's ice seal (bearded, ringed, spotted and ribbon seals) data sets are available on the NOAA Fisheries Open Data Portal.
ESA Section 7 Biological Opinion on the Issuance of a LOA to Hilcorp Alaska, LLC and Eni U.S. Operating Co. Inc. for Sea Ice Roads and Trails on the North Slope, Beaufort Sea, Alaska, 2020 to 2025, NMFS Consultation Number: AKRO-2019-00194.