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Common Bottlenose Dolphin (Tursiops truncatus) habitat-based density estimates in the California Current Ecosystem.
Habitat-based density models were developed for 14 species and one guild (Mesoplodonts and Cuvier’s beaked whale) using 92,214 km of on-effort survey data collected between 1991 and 2018 within the CCE study area.
To generate average density surfaces, predictions were made on daily grids encompassing the 1996-2018 surveys (late June – early December). Models thus provide “multi-year average density surfaces” representative of the summer/fall period.
In these maps, uncertainty (expressed as CVs) account for environmental variability during the 1996-2018 survey period.
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Data Provided By:
Elizabeth A. Becker
Content date:
1991-2018
Citation:
Elizabeth A. Becker, Karin A. Forney, David L. Miller, Paul C. Fiedler, Jay Barlow, and Jeff E. Moore. 2020. Habitat-based density estimates for cetaceans in the California Current Ecosystem based on 1991-2018 survey data, U.S. Department of Commerce, NOAA Technical Memorandum NMFS-SWFSC-638
By downloading data, users agree to cite the original publication (as shown above) for any applications.
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This map has been created to support California offshore wind energy planning by the Intergovernmental Renewable Energy Task Force. This map contains data that describe marine life presence at a given location by considering the occurrence, activity, density, and/or habitat of toothed whales.