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    • AFSC/NMML: Killer whale surveys in the Aleutian Islands, Bering Sea, and western and central Gulf of Alaska, 2001 - 2010

    Metadata Updated: November 1, 2024

    This dataset is a compilation of line-transect data collected on surveys in the Aleutian Islands, Bering Sea, and western and central Gulf of Alaska, 2001 - 2010. All the surveys were conducted with similar methods using line-transect protocols, allowing effort to be quantified, but there were differences in transect design in some years (some surveys were systematic, some were not). Sighting information for all cetacean and at-sea pinniped species was collected. The database was compiled with the intent of including all surveys with sighting data on killer whales, in order to assess killer whale population biology in this region. Surveys included in this database are 2001 - 2007, 2009 and 2010 NMML killer whale surveys.

    Access & Use Information

    License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

    Downloads & Resources

    Dates

    Metadata Date October 3, 2024
    Metadata Created Date October 28, 2022
    Metadata Updated Date November 1, 2024
    Reference Date(s) 2010 (creation), (publication)
    Frequency Of Update annually

    Metadata Source

    Harvested from NMFS AFSC

    Other Data Resources

    Additional Metadata

    Resource Type Dataset
    Metadata Date October 3, 2024
    Metadata Created Date October 28, 2022
    Metadata Updated Date November 1, 2024
    Reference Date(s) 2010 (creation), (publication)
    Responsible Party (Point of Contact, Custodian)
    Contact Email
    Guid gov.noaa.nmfs.inport:17410
    Access Constraints Cite As: Alaska Fisheries Science Center, [Date of Access]: AFSC/NMML: Killer whale surveys in the Aleutian Islands, Bering Sea, and western and central Gulf of Alaska, 2001 - 2010 [Data Date Range], https://www.fisheries.noaa.gov/inport/item/17410., Access Constraints: There are no legal restrictions on access to the data. They reside in public domain and can be freely distributed., 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. Acknowledgement of NOAA/NMFS/AFSC, as the source from which these data were obtained in any publications and/or other representations of these, data is suggested., Distribution Liability: The user is responsible for the results of any application of this data for other than its intended purpose. NOAA denies liability if the data are misused.
    Bbox East Long -148
    Bbox North Lat 58
    Bbox South Lat 51
    Bbox West Long 170
    Coupled Resource
    Frequency Of Update annually
    Harvest Object Id 2ddae3fc-1bd5-45bc-b524-d9c18f5b0f15
    Harvest Source Id 26a29bb9-50b0-47fd-920b-edc74aa6ec76
    Harvest Source Title NMFS AFSC
    Licence 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.
    Lineage Visual observation with 7x or 25x binoculars by two primary observers and with 7X binoculars by data recorder according to standard line transect sampling methods. Surveys varied, depending on the cruise, in the number of observers, the observation location on the ships (bridge, bridge wings, flying bridges, etc), rotation schedules, as well as the survey goals. Surveys in 2001-2003 had a stratified systematic design using a zig-zag pattern with random starting points within survey blocks in order to produce line-transect estimates of abundance (see Zerbini et al. 2006). Surveys in 2004 through 2010 (primarily in the Aleutians) used non-systematic transects designed to maximize encounters with killer whales for photo-ID, biopsy, and tagging, most often involving strategies that included (1) running transects close to shore (particularly near pinniped rookeries or haul-outs), (2) running circuits around islands, (3) running straight lines across open water between islands, and (4) running transects through areas with known killer whale concentrations.
    Metadata Language eng
    Metadata Type geospatial
    Old Spatial {"type": "Polygon", "coordinates": [[[170.0, 51.0], [-148.0, 51.0], [-148.0, 58.0], [170.0, 58.0], [170.0, 51.0]]]}
    Progress completed
    Spatial Data Service Type
    Spatial Reference System
    Spatial Harvester True
    Temporal Extent Begin 2001
    Temporal Extent End 2010

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