These data are part of North Pacific Research Board Project 414 and Project 514. Project 514 provided a second year of data collection to the study detailed in Banks et al. (2006; North Pacific Research Board Project 414 Final Report; https://workspace.aoos.org/published/file/48ffae91-0274-4b2b-bc84-5378554070c1/f0414_final_report.pdf?source=catalog&portalId=92), and are summarized together in Springer et al. (2008; North Pacific Research Board Project 514 Final Report; https://workspace.aoos.org/files/2580819/514_Final%20report.pdf?source=catalog&portalId=92

Adult female northern fur seals were captured with hoop nets at 2 breeding colonies (Reef and Vostochni Rookeries) on St. Paul Island, Alaska, and at the single breeding colony on Bogoslof Island, Alaska. Captures occurred during November, 2004 (St. Paul Island only); July, 2005; October-November, 2005; and July 2006. 20 seals at each island and during each capture period were weighed, measured, flipper tagged, and instrumented with satellite tags (platform transmitter terminals, or PTTs), for a total of 140 deployments. Seals were also instrumented with archival time-depth recorders (TDRs) during the July, 2005 (n = 20 TDRs at each island) and July, 2006 (n = 17 TDRs at each island) capture periods. Seals were recaptured, and the instruments recovered, at the end of the each summer. Data collection began on 11/06/2004 and ended on 10/19/2006; data represent 2 winter (fur seal migration) and 2 summer (fur seal lactation) study seasons. PTT (model: Kiwisat 101 and 202; Sirtrack Limited, Havelock North, New Zealand) transmissions were programmed to duty cycle at 4 hours on, 8 hours off during the winter study seasons and at 4 hours on, 4 hours off during the summer study seasons. TDRs (model Mk9; Wildlife Computers, Redmond, WA) sampled depth and temperature every 5 second. Data are composed of: fur seal capture and instrument deployment histories (1 spreadsheet); seal locations obtained from PTT deployments (4 spreadsheets, each containing all seal locations during a study season); TDR environmental sampling records (65 text files in 4 folders, each file representing a single TDR deployment and each folder representing the deployment island and summer study year for the included TDR files).