https://doi.org/10.82144/0cbd04d0 https://www.gbif.org/dataset/f30db7c2-5f7b-449d-a508-34b701e95c43 https://seamap.env.duke.edu/dataset/99 https://obis.org/dataset/cec21074-052e-4e1c-99b1-e56ec8d5c0ae zd_99 John Calambokidis John Calambokidis Primary contact Calambokidis@cascadiaresearch.org OBIS-SEAMAP Marine Geospatial Ecology Lab, Duke University

A328 LSRC building Durham NC 27708 US

seamap-contact@duke.edu https://seamap.env.duke.edu OBIS-SEAMAP Marine Geospatial Ecology Lab, Duke University

A328 LSRC building Durham NC 27708 US

seamap-contact@duke.edu https://seamap.env.duke.edu distributor John Calambokidis John Calambokidis Primary contact Calambokidis@cascadiaresearch.org owner 2025-09-29 eng Original provider: Cascadia Research Collective Dataset credits: Cascadia Research Abstract: 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. Occurrence GBIF Dataset Type Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_type.xml Observation GBIF Dataset Subtype Vocabulary: http://rs.gbif.org/vocabulary/gbif/dataset_subtype.xml Marine Biology Visual sighting Vessels Sightings N/A Updated on March 30, 2006, expanding the dataset up to 2004. This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC) 4.0 License. https://seamap.env.duke.edu/dataset/99 Western Pacific sector, Data extent 168.94 180 59.28 -14.43 Eastern Pacific sector, Data extent -180 -80.61 59.28 -14.43 1975-12-01 2004-11-02 Scientific names are based on the Integrated Taxonomic Information System (ITIS). species Balaenoptera musculus Blue whale 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). notPlanned John Calambokidis John Calambokidis Primary contact Calambokidis@cascadiaresearch.org NA NA NA John Calambokidis owner NA 2025-09-29T11:45:36-04:00 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. Calambokidis, J. and J. Barlow. 2004. Abundance of blue and humpback whales in the eastern North Pacific estimated by capture-recapture and line-transect methods. Marine Mammal Science20(1):63-85. OBIS-SEAMAP Dataset Page UTF-8 Interactive map https://seamap.env.duke.edu/dataset/99 FGDC Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/99/fgdc EML Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/99/eml OBIS-SEAMAP zd_99 zd_99