This dataset consists of 6,560 sighting records, including at least 1,803 uniquely identified blue whales. These were collected by Cascadia Research and collaborators from the eastern North Pacific from 1975 through 2004 (data collection is continuing). The primary extent of this dataset includes waters off California, Oregon, and Washington from 1986 to 2004, which accounts for over 6,000 of the records. Additional sighting records are from other regions of the North Pacific including the Eastern Tropical Pacific, British Columbia, and Alaska. These data represent the most extensive database of blue whale sightings available from the waters off the western United States and have provided the primary information available on movements and abundance of eastern North Pacific blue whales. Effort was not evenly distributed throughout the region so sighting locations are biased towards areas of highest effort. ID field links resightings of the same individual. Data were gathered to document movements, population structure and abundance of blue whales in the eastern North Pacific (see Calambokidis and Barlow 2004, Calambokidis and Steiger 1997, Calambokidis et al. 1990). Updated on March 30, 2006, expanding the dataset up to 2004. Calambokidis, J2013https://doi.org/10.82144/0cbd04d0OBIS-SEAMAP99https://seamap.env.duke.edu/dataset/99OBIS-SEAMAPVersion 1.7.1vector digital data ground condition 19751201 20041102 Complete None planned 168.94279.3959.28-14.43168.94279.3959.28-14.43 NoneVesselsSightings Open public unless otherwise noted. See Use Constraints for details. 1. Not to use data obtained from OBIS-SEAMAP in any publication, product, or commercial application without proper attribution to the original data provider(s) and OBIS-SEAMAP unless the datasets are explicitly shown under the CC0 policy. Citations or credits are suggested as attribution. If the data you downloaded come from multiple datasets, a citation or credit to each of the datasets is required. Suggested citation for this dataset: Calambokidis, J. 2013. Cascadia Research Blue Whale Photo IDs for US West Coast, 1972-2004. Version 1.7.1. Dataset published in OBIS-SEAMAP. https://doi.org/10.82144/0cbd04d0. Suggested citation for OBIS-SEAMAP: Halpin, P.N., A.J. Read, E. Fujioka, B.D. Best, B. Donnelly, L.J. Hazen, C. Kot, K. Urian, E. LaBrecque, A. Dimatteo, J. Cleary, C. Good, L.B. Crowder, and K.D. Hyrenbach. 2009. OBIS-SEAMAP: The world data center for marine mammal, sea bird, and sea turtle distributions. Oceanography 22(2):104-115 2. To forward the citation of any publication / report that made use of the data / tools provided by OBIS-SEAMAP for inclusion in our list of references. 3. Not to hold OBIS-SEAMAP or the original data providers liable for errors in the data. While we have made every effort to ensure the quality of the database, we cannot guarantee the accuracy of these datasets. 4. The burden for determining fitness for use of the downloaded data for any analyses lies entirely with the user. OBIS-SEAMAP or the original data providers do not support outcomes of your analyses that used the data you downloaded from OBIS-SEAMAP. 5. To consider inclusion of the accompanying transect (effort) dataset if available into the methodology of your analyses. 6. Not to redistribute the data you downloaded from OBIS-SEAMAP through any media without contect from OBIS-SEAMAP and the original data providers unless the datasets are explicitly shown under the CC0 policy. Shapefile John Calambokidis mailing and physical address

Calambokidis@cascadiaresearch.org Cascadia Research Integrated Taxonomic Information Systemhttp://www.itis.usda.gov/Downloaded April, 2004Refer to the contact information of the dataset Relational databaseCalambokidis, J. and J. Barlow2004vector digital dataMarine Mammal Science20(1):63-85http://www.cascadiaresearch.org/reports/MMS-MnBm-04.pdfCalambokidis, J. and G.H. Steiger1997vector digital dataVoyager Press, MN72 pp.Calambokidis, J., G.H. Steiger, J.C. Cubbage, K.C. Balcomb, C. Ewald, S. Kruse, R. Wells, and R. Sears1990vector digital dataReport of the International Whaling CommissionSpecial Issue 12:342-348Halpin, P.N., A.J. Read, E. Fujioka, B.D. Best, B. Donnelly, L.J. Hazen, C. Kot, K. Urian, E. LaBrecque, A. Dimatteo, J. Cleary, C. Good, L.B. Crowder, and K.D. Hyrenbach2009Oceanography22(2):104-115 Ei FujiokaDuke Universitymailing and physical address

LSRC A328

DurhamNCUSA27708efujioka@duke.edu919-613-8021 http://www.nbii.gov/ Biological Data Profile 2025092920250929 Data were put through the OBIS-SEAMAP data registration steps.20250925 OBIS-SEAMAPNicholas School of Environment, Duke Univ.mailing and physical address

A328, LSRC

DurhamNC27708USA919-613-8021seamap-contact@duke.eduNot to hold OBIS-SEAMAP liable for errors in the data. While we have made every effort to ensure the quality of the database, we cannot guarantee the accuracy of these datasets. Also please refer to Use Constraints.FreeGo to the OBIS-SEAMAP web sitezipzipped shapefilehttp://seamap.env.duke.edu/dataset/99OBIS-SEAMAP Dataset ID 99GCS_WGS_1984Decimal degrees0.010.01D_WGS_1984WGS_19846378137.000000298.257224Cascadia Research CollectiveBiogeographic dataBiogeographic dataNot applicableseriesData providerresearchgrData providerloccodeData providerregionData providersub_areaData providerlocalityData providerdateObserved dateData providertimeObserved timeData providerlat_sData providerlon_sData providerlatLatitude of observationData providerlongLongitude of observationData providerpositiontyData providergroupsizeData providernumcalvesData providernumidsData providergroupbehData providerphotographData providerquallData providerqualrData providerqualfData providerspeciesSpecies observedData providertsnSpecies ITIS TSNData providergeomData provideroidUnique ID number (generated by OBIS-SEAMAP)Data provider