https://doi.org/10.82144/1c988d78 https://seamap.env.duke.edu/dataset/460 https://www.gbif.org/dataset/85bb9817-fe01-4f6d-8ad1-3b861a7cec61 https://obis.org/dataset/1d063315-5a15-4d9d-9a2f-b62ba744198b Julien Delarue Allied Whale, College of the Atlantic Primary contact jdelarue@coa.edu OBIS-SEAMAP Marine Geospatial Ecology Lab, Duke University

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seamap-contact@duke.edu https://seamap.env.duke.edu distributor Julien Delarue Allied Whale, College of the Atlantic Primary contact jdelarue@coa.edu owner 2025-07-31 eng Original provider: Richard Sears, Mingan Island Cetacean Study Dataset credits: Richard Sears, Mingan Island Cetacean Study Abstract: The sightings contained in this dataset were obtained during surveys designed to photo-identify blue whales in the Sea of Cortez during their peak abundance in February and March. The surveys were conducted between 1984 and 2007 from 25' fiberglass boats in sea state less than 3-4 and designed to maximize the number of blue whale IDs. Although focusing primarily on the areas where blue whales are most commonly sighted, they also covered most of the area accessible by boat during a day trip at least once per field season. Any marine mammal sighting was recorded using cross-bearings from 1984 to 1991 and using GPS from 1992 on. Unusual bird and fish sightings were also recorded. 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 Blue whale - Marine mammals - sightings N/A The sightings of <i>Balaenoptera edeni</i> were recognized as Bryde's whale by the data provider. The ITIS taxonomy database gives it the common name of Eden's whale. Thus, in our system it shows Eden's whale instead of Bryde's whale as a common name. There may seem to be duplicated records in the dataset. However, records are different, near-by sightings (within 100-200 m) recorded while the researchers were conducting photo-ID activities and for which an exact position could not be obtained. Thus, their positions were approximated as that of the animal/group the researchers were working with at that time. The records without coordinates were removed. This work is licensed under a Creative Commons Attribution (CC-BY) 4.0 License. https://seamap.env.duke.edu/dataset/460 Oceans,Sea of Cortez - Loreto -112.35 -106.486944 26.920833 22.9125 1984-03-24 2007-03-26 Scientific names are based on the Integrated Taxonomic Information System (ITIS). genus Balaenoptera Baleen whales species Balaenoptera edeni Eden's whale species Balaenoptera musculus Blue whale species Balaenoptera physalus Fin whale family Cheloniidae Sea turtles species Cyanea capillata Lion's mane family Delphinidae Dolphins species Delphinus delphis Short-beaked common dolphin species Eschrichtius robustus Gray whale species Globicephala macrorhynchus Short-finned pilot whale species Globicephala melas Long-finned pilot whale species Haematopus palliatus American oystercatcher species Kogia breviceps Pygmy sperm whale species Kogia sima Dwarf sperm whale species Lagenorhynchus obliquidens Pacific white-sided dolphin species Larus heermanni Heermann's gull species Larus livens Yellow-footed gull species Manta birostris Atlantic manta species Megaptera novaeangliae Humpback whale species Oceanodroma melania Black storm petrel species Orcinus orca Killer whale species Pandion haliaetus Osprey species Pelecanus occidentalis Brown pelican species Phaethon lepturus White-tailed tropicbird species Physeter macrocephalus Sperm whale species Pseudorca crassidens False killer whale genus Sphyrna Bonnethead sharks species Sula leucogaster Brown booby species Sula nebouxii Blue-footed booby species Tursiops truncatus Common bottlenose dolphin species Zalophus californianus California sea lion notPlanned Julien Delarue Allied Whale, College of the Atlantic Primary contact jdelarue@coa.edu NA NA NA Julien Delarue owner NA zd_460 2025-07-31T14:17:48-04:00 dataset Delarue, J. 2014. Mingan Island Cetacean Study 84-07. Version 1.4.0. Dataset published in OBIS-SEAMAP. https://doi.org/10.82144/1c988d78. OBIS-SEAMAP Dataset Page UTF-8 Interactive map https://seamap.env.duke.edu/dataset/460 FGDC Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/460/fgdc EML Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/460/eml OBIS-SEAMAP zd_460 zd_460