https://doi.org/10.82144/b2532c42 https://seamap.env.duke.edu/dataset/794 https://www.gbif.org/dataset/27ae99c5-f9ce-4403-a0a9-2f26ef7b7ace https://obis.org/dataset/0b8facff-924a-449b-bfbc-f3ea52d47cc9 Annie Douglas Cascadia Research Collective Primary contact ABDouglas@cascadiaresearch.org http://www.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 Annie Douglas Cascadia Research Collective Primary contact ABDouglas@cascadiaresearch.org http://www.cascadiaresearch.org owner 2025-07-31 eng Original provider: Annie Douglas, Cascadia Research Collective Dataset credits: Annie Douglas, Cascadia Research Abstract: From July 2004 to April 2008 dedicated visual observers following consistent line-transect methods (Buckland et al., 1993; Kinzey et al., 2003) observed from the CalCOFI platforms on quarterly cruises. Observers used handheld 7X50 reticle Fujinon binoculars to sight, identify, and make school size estimates of cetaceans and pinnipeds encountered along the transect lines between CalCOFI water sampling stations. The southern water sampling stations are set along six, parallel lines running southwest to northeast, with lines increasing in length from north to south (470 – 700 km) and stations occurring every 37 km in coastal and continental shelf waters and every 74 km offshore. Three research vessels were used for the sixteen surveys, Scripps Institution of Oceanography Roger Revelle (2 surveys) and New Horizon (8 surveys) and, NOAA David Starr Jordan (6 surveys), vessel height varied from 8.1-13.2m and survey speed varied from 10 to 12 knots. 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 Effort tracklines may overlap with data published in the <a href="http://seamap.env.duke.edu/dataset/507">CalCOFI and NMFS Seabird and Marine Mammal Observation Data, 1987-2006</a> dataset. However, data collected for this dataset used different methods and observers. Please contact the primary contact listed for more details. This work is licensed under a Creative Commons Attribution Non Commercial (CC-BY-NC) 4.0 License. https://seamap.env.duke.edu/dataset/794 Oceans,Southern California -124.247378 -117.274725 35.091569 29.848479 2004-07-13 2008-04-06 Scientific names are based on the Integrated Taxonomic Information System (ITIS). genus Balaenoptera Baleen whales species Balaenoptera acutorostrata Common minke whale species Balaenoptera borealis Sei whale species Balaenoptera musculus Blue whale species Balaenoptera physalus Fin whale order Cetacea Cetaceans family Delphinidae Dolphins genus Delphinus Common dolphins species Delphinus capensis Long-beaked common dolphin species Delphinus delphis Short-beaked common dolphin species Eschrichtius robustus Gray whale species Globicephala macrorhynchus Short-finned pilot whale species Grampus griseus Risso's dolphin species Lagenorhynchus obliquidens Pacific white-sided dolphin species Lissodelphis borealis Northern right whale dolphin species Megaptera novaeangliae Humpback whale species Phocoenoides dalli Dall's porpoise species Physeter macrocephalus Sperm whale species Steno bredanensis Rough-toothed dolphin species Tursiops truncatus Common bottlenose dolphin species Ziphius cavirostris Cuvier's beaked whale The waters off southern California are remarkably diverse and species rich, but they are also an area of swift commercial development, navy training activity, population growth and climate change. Continued visual marine mammal and seabird surveys working in concert with oceanographic ecosystem investigations are essential for monitoring the health and changes of the California current system. notPlanned Annie Douglas Cascadia Research Collective Primary contact ABDouglas@cascadiaresearch.org http://www.cascadiaresearch.org NA NA NA Annie Douglas owner NA zd_794 2025-07-31T15:33:27-04:00 dataset Douglas, A. 2012. CalCOFI marine mammal surveys 2004-2008 - off effort. Version 1.0.0. Dataset published in OBIS-SEAMAP. https://doi.org/10.82144/b2532c42. OBIS-SEAMAP Dataset Page UTF-8 Interactive map https://seamap.env.duke.edu/dataset/794 FGDC Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/794/fgdc EML Metadata UTF-8 XML https://seamap.env.duke.edu/dataset/794/eml OBIS-SEAMAP zd_794 zd_794 Douglas, A.B., et al. In prep. Seasonal stratified density estimates for the southern California Bight based on CalCOFI cruises.