Survival of sockeye salmon migrating past Haida Gwaii

This is the OBIS extraction of the Ocean Tracking Network and Department of Fisheries and Oceans Canada (DFO) HGSS, consisting of the release tagging metadata, i.e. the location and date when the tagged animal was released, and summarized detection events of tagged individuals.
If readers are interested in the source dataset they may also inquire with the project PIs as listed here or on the OTN web site (https://members.oceantrack.org/project?ccode=NEP.HGSS).
Abstract:Fraser River sockeye salmon productivity has declined over recent decades and elevated marine mortality rates due to predation are one hypothesized driver. We are deploying acoustic tags on adult sockeye salmon near Haida Gwaii as they undergo their return migration to the Fraser River. Detections data will be used to estimate cumulative survival rates to freshwater as well as stage-specific survival during marine migrations.