gov.noaa.nmfs.inport:24582 eng UTF8 dataset CSV Files Alaska Fisheries Science Center 7600 Sand Point Way N.E., Building 4 Seattle WA 98115 USA https://www.afsc.noaa.gov WWW:LINK-1.0-http--link Website Website for this organization information 0700-1700 Pacific Time resourceProvider Fadely, Brian 206-526-6173 206-526-6615 SEATTLE WA USA brian.fadely@noaa.gov pointOfContact 2026-03-04T19:17:21 ISO 19115-2 Geographic Information - Metadata Part 2 Extensions for imagery and gridded data ISO 19115-2:2009(E) Alaska Steller Sea Lion Non-pup Count Database AFSC/MML: Alaska Steller Sea Lion Non-pup Count Database 2015-04-23 creation 2021-06-10 revision 2016 publication NOAA/NMFS/EDM 24582 DOI Registration Authority 2015-08-13 inForce 10.7289/v54f1np1 https://www.fisheries.noaa.gov/inport/item/24582 WWW:LINK-1.0-http--link Full Metadata Record View the complete metadata record on InPort for more information about this dataset. information Fritz, Lowell lowell.fritz@noaa.gov originator https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:0128190 WWW:LINK-1.0-http--link Citation URL Link to metadata and data hosted at NODC Ocean Archive System download https://data.nodc.noaa.gov/cgi-bin/iso?id=gov.noaa.nodc:0129877 WWW:LINK-1.0-http--link Citation URL Link to rookery and haulout name and location data, corresponding with "sitename" data field. download tableDigital Cite data as: NMFS/AFSC/MML/Alaska Ecosystem Program (2021). Counts of Alaska Steller sea lion adult and juvenile (non-pup) conducted on rookeries and haul-outs in Alaska Aleutian Islands, Bering Sea, and others from 1904-01-01 to 2019-07-03 (NCEI Accession 0128190). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.7289/v54f1np1. Accessed [date]. This database contains counts of adult and juvenile (non-pup) Steller sea lions on rookeries and haulouts in Alaska made between 1904 and 2019. Non-pup counts have been conducted throughout the year. Breeding season (June-mid July) non-pup counts are used for population trend analysis, while counts at other times are used for analyses of distribution and for other purposes. Non-pups are counted from the ground (by walking along the rookery), from cliff-side overlooks, and from aerial imagery (oblique and vertical orientation). Non-pup counts represent only a fraction of the total number of animals that may use a site. Sea lions haul-out less frequently in winter than in summer; thus, winter counts represent a smaller fraction of the total population than summer counts. Counts of Steller sea lions pups, adults, and juveniles are used to monitor trends in the population and used in the development of population models. Cite data set as: NMFS/AFSC/MML/Alaska Ecosystem Program (2021). Counts of Alaska Steller sea lion adult and juvenile (non-pup) conducted on rookeries and haul-outs in Alaska Aleutian Islands, Bering Sea, and others from 1904-01-01 to 2019-07-03 (NCEI Accession 0128190). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.7289/v54f1np1. Accessed [date]. underDevelopment Sweeney, Kathryn katie.sweeney@noaa.gov pointOfContact Sweeney, Kathryn katie.sweeney@noaa.gov custodian asNeeded https://www.ncei.noaa.gov/access/metadata/landing-page/bin/gfx?id=gov.noaa.nodc:0128190 Aerial survey Eumetopias jubatus Steller sea lion Survey otariid pinniped population theme fall summer winter temporal Alaska Aleutian Islands Bering Sea British Columbia Gulf of Alaska Prince William Sound Southeast Alaska place DOC/NOAA/NMFS/AFSC > Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce dataCentre Global Change Master Directory (GCMD) Data Center Keywords 2017-04-24 publication 8.5 Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA) https://forum.earthdata.nasa.gov/app.php/tag/GCMD%2BKeywords GCMD Keyword Forum Page Global Change Master Directory (GCMD). 2025. GCMD Keywords, Version 22. Greenbelt, MD: Earth Science Data and Information System, Earth Science Projects Division, Goddard Space Flight Center (GSFC), National Aeronautics and Space Administration (NASA). URL (GCMD Keyword Forum Page): https://forum.earthdata.nasa.gov/app.php/tag/GCMD+Keywords information custodian Alaska Ecosystems Program project InPort otherRestrictions Cite As: Alaska Fisheries Science Center, [Date of Access]: Alaska Steller Sea Lion Non-pup Count Database [Data Date Range], https://www.fisheries.noaa.gov/inport/item/24582. NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose. otherRestrictions Access Constraints: There are no legal restrictions on access to the data. They reside in public domain and can be freely distributed. User must read and fully comprehend the metadata prior to use. Applications or inferences derived from the data should be carefully considered for accuracy. otherRestrictions Use Constraints: User must read and fully comprehend the metadata prior to use. Applications or inferences derived from the data should be carefully considered for accuracy. While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. Communication and collaboration with data set authors is strongly encouraged. Cite data as: NMFS/AFSC/MML/Alaska Ecosystem Program (2021). Counts of Alaska Steller sea lion adult and juvenile (non-pup) conducted on rookeries and haul-outs in Alaska Aleutian Islands, Bering Sea, and others from 1904-01-01 to 2019-07-03 (NCEI Accession 0128190). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.7289/v54f1np1. Accessed [date]. otherRestrictions Distribution Liability: Applications or inferences derived from the data should be carefully considered for accuracy. While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty. unclassified None. None. NOAA Data Management Plan (DMP) NOAA/NMFS/EDM 24582 https://www.fisheries.noaa.gov/inportserve/waf/noaa/nmfs/afsc/dmp/pdf/24582.pdf WWW:LINK-1.0-http--link NOAA Data Management Plan (DMP) NOAA Data Management Plan for this record on InPort. information crossReference eng; US biota oceans Data table output as a .csv file from a SQL database. 172 -131 52 63 Aleutian Islands, Bering Sea, Gulf of Alaska to Southeast Alaska coastline | Currentness: Ground Condition 1904 false eng false Data Table SSLnonpupcounts2019.csv 2021-06-29 publication .gz GZ / GZIP NOAA National Centers for Environmental Information ncei.info@noaa.gov https://www.ncei.noaa.gov/contact WWW:LINK-1.0-http--link NCEI Contact Information Information for contacts at NCEI. information distributor https://www.nodc.noaa.gov/cgi-bin/OAS/prd/download/128190.2.4.tar.gz WWW:LINK-1.0-http--link 128190.2.4.tar.gz Download most recent version. download dataset Representativeness STELLER SEA LION NON-PUP COUNT DATABASE Last Update: June 10, 2021 The file "SSLnonpupcounts2019.csv" contains counts from Alaska of non-pup (adult and juvenile) Steller sea lions in the NMML database. The counts were made between 1904 and 2019. This file includes counts obtained during breeding season aerial surveys, as well as counts obtained during winter aerial surveys, boat surveys, cliff counts, and other miscellaneous counts. The non-pup count data file (SSLnonpupcounts2019.csv) is in ASCII text format and fields are comma-delimited (.csv). Completeness Report There are several issues with the data that users need to be aware of before using this database. 1. This database is continually being updated and modified. Users should check for the date the database was last modified. 2. This data set includes counts from all times year, some of which may not be appropriate for particular analyses. The number of sea lions at a given site is extremely seasonally dependent. Comparison of counts from November in one year and from July in another year is likely to produce confounded results. Population trend analyses typically are performed using data only from the breeding season June and July. 3. The most precise counts, and thus the counts preferred for population trend analyses, are aerial survey counts made from photographs. Counts made from skiffs or ships may be very accurate for small numbers of sea lions but imprecise for large groups. Visual estimates made from the air are best used as qualitative not quantitative data. 4. In general, this database includes counts of non-pup (adult and juvenile) Steller sea lions. This means that counts made during the breeding season (June and July) do not include newborn pups. After pups undergo their first molt in the fall or early winter, however, they are the same color as older sea lions and they are difficult or impossible to distinguish from juveniles. For this reason, counts made outside of the breeding season do include pups of the year that are 4 to 12 months old. 5. A zero in the COUNT field means the site was surveyed and no sea lions were present. If a site was not surveyed in a given year it is not included in the database; there are no records with the COUNT field blank. 6. Throughout the database "99" indicates that a day, month, platform, or source is unknown. 7. There are blanks in the COMMENT field. This may cause problems when end users import the ASCII text file into their preferred software format. 8. Site names are not consistent throughout the database. Surveys prior to 1990 frequently combined separate haul-out sites on an island into a single count, whereas more recent surveys usually list sites separately (e.g., Agattu versus Agattu/Cape Sabak and Agattu/Gillon Point). Also, the NMML continues to refine the definition of individual sites and occasionally adds new sites. Conceptual Consistency Not applicable. The Marine Mammal Laboratory (MML) conducted aerial surveys to photograph and count Steller sea lion (Eumetopias jubatus) non-pups (adults and juveniles ≥1 years old) on known terrestrial rookery and haulout sites in Alaska in June-July 2019 (Sweeney et al. 2019). On odd years, MML focuses their survey effort on the Gulf of Alaska (Southeast Alaska towards the western Gulf of Alaska) portion of the Steller sea lion range in Alaska. The occupied aircraft survey team conducted their survey from 24 June to 4 July from southeast Alaska (Dixon Entrance, 132°W) through the western Gulf of Alaska (Sanak Islands, 163°W). On even years, MML focuses their survey effort in the Aleutian Islands (from the western through the eastern Aleutian Islands regions), and sometimes into the western Gulf of Alaska region if not surveyed the previous year. The ship-based survey team on board the R/V Tiĝlâx did not conduct visual counts or collect aerial imagery using an unoccupied aircraft system (UAS or drone) during the cruise from 20 June to 2 July. The survey team did travel the Aleutian Islands between Adak Island (176°W) and Attu Island (172°E) focusing on other research priorities. No surveys were conducted in 2020 due to global COVID-19 pandemic. For surveys back to 2008, see discussions in Fritz et al. (2013), Fritz et al. (2016), Sweeney et al. (2016), Sweeney et al. (2017), and Sweeney et al. (2018). See Sweeney et al. (2019) for process steps. 2019-12-06T00:00:00 Sweeney, Kathryn katie.sweeney@noaa.gov processor Fritz, L., K. Sweeney, D. Johnson, M. Lynn, T. Gelatt, and J. Gilpatrick. 2013. Aerial and ship-based surveys of Steller sea lions (Eumetopias jubatus) conducted in Alaska in June-July 2008 through 2012, and an update on the status and trend of the western distinct population segment in Alaska. U.S. Dep. Commer., NOAA Tech. Memo. NMFSAFSC-251, 91 p. 2013-05-01 publication Alaska Fisheries Science Center, AFSC https://www.afsc.noaa.gov/Publications/AFSC-TM/NOAA-TM-AFSC-251.pdf WWW:LINK-1.0-http--link Source Citation URL Technical Memorandum describing Steller sea lion surveys in Alaska 2008-2012. information publisher 2008 2012 Fritz, L., K. Sweeney, R. Towell, and T. Gelatt. 2016. Aerial and shipbased surveys of Steller sea lions (Eumetopias jubatus) conducted in Alaska in June-July 2013 through 2015, and an update on the status and trend of the western distinct population segment in Alaska. U.S. Dep. Commer., NOAA Tech. Memo. NMFS-AFSC-321, 72 p. doi:10.7289/V5/TM-AFSC-321. 2016-05-02 publication Alaska Fisheries Science Center, AFSC https://www.afsc.noaa.gov/Publications/AFSC-TM/NOAA-TM-AFSC-321.pdf WWW:LINK-1.0-http--link Source Citation URL Technical Memorandum detailing Steller sea lion surveys in Alaska 2013-1015. information publisher 2013 2015 Sweeney, K., Burkemeier, B., Luxa, K, and T. Gelatt. 2019. Results of Steller sea lion surveys in Alaska, June-July 2019. Memorandum to The Record, 6 December 2019. NMFS Alaska Fisheries Science Center, Seattle, WA. 21 pp. 2019-12-06 publication Kathryn Sweeney https://media.fisheries.noaa.gov/dam-migration/ssl_aerial_survey_2019_final_508.pdf WWW:LINK-1.0-http--link Source Citation URL Memorandum describing 2019 Steller sea lion surveys in Alaska. information originator 2019-06-24 2019-07-15 Sweeney, K., L. Fritz, R. Towell, and T. Gelatt. 2016. Results of Steller Sea Lion Surveys in Alaska, June-July 2016. Memorandum to The Record, 5 December 2016. NMFS Alaska Fisheries Science Center, Seattle, WA. 16 pp. 2016-12-05 publication Kathryn Sweeney https://media.fisheries.noaa.gov/dam-migration/ssl_aerial_survey_2016_fisheries-508.pdf WWW:LINK-1.0-http--link Source Citation URL Memorandum describing 2016 Steller sea lion surveys in Alaska. information originator 2016-06-23 2016-07-11 Sweeney, K., L. Fritz, R. Towell, and T. Gelatt. 2017. Results of Steller Sea Lion Surveys in Alaska, June-July 2017. Memorandum to the Record, 29 November 2017. NMFS Alaska Fisheries Science Center, Seattle, WA. 17 pp. 2017-11-29 publication Kathryn Sweeney https://repository.library.noaa.gov/view/noaa/18790 WWW:LINK-1.0-http--link Source Citation URL Memorandum describing 2017 Steller sea lion surveys in Alaska. information originator 2017-06-22 2017-07-07 Sweeney, K., Towell, R., and T. Gelatt. 2018. Results of Steller Sea Lion Surveys in Alaska, June-July 2018. Memorandum to the Record, 4 December 2018. NMFS Alaska Fisheries Science Center, Seattle, WA. 19 pp. 2018-12-04 publication Kathryn Sweeney https://media.fisheries.noaa.gov/dam-migration/ssl_aerial_survey_2018_final.pdf WWW:LINK-1.0-http--link ssl_aerial_survey_2018_final.pdf Memorandum describing 2018 Steller sea lion surveys in Alaska. information originator 2018-06-23 2018-06-23 otherRestrictions otherRestrictions Access Constraints: None | Use Constraints: Metadata are subject to revision at any time and information within the metadata record should not be cited without author consent. While every effort has been made to ensure that these data are accurate and reliable within the limits of the current state of the art, NOAA cannot assume liability for any damages caused by any errors or omissions in the data, nor as a result of the failure of the data to function on a particular system. NOAA makes no warranty, expressed or implied, nor does the fact of distribution constitute such a warranty.