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Predictive Models of Cetacean Densities in the California Current Ecosystem, 2020b

Metadata Updated: November 10, 2023

To develop improved species distribution models (SDMs) and to update US West Coast cetacean stock abundance estimates, sighting data from NOAA’s Southwest Fisheries Science Center 2018 California Current Ecosystem Survey were combined with previous line-transect survey data collected within the study area to create a robust modeling database spanning more than 25 years (1991–2018). Habitat models were developed based on previously established methods that allow for the incorporation of segment-specific estimates of detection probability and included dynamic covariates from an ocean model calibrated to the California Current Ecosystem study area. In addition, recently-developed techniques for deriving more comprehensive estimates of uncertainty in SDM predictions were used to provide variance estimates for the model-based abundance estimates. SDMs were developed for short-beaked common dolphin (Delphinus delphis delphis), long-beaked common dolphin (Delphinus delphis bairdii), northern right whale dolphin (Lissodelphis borealis), Pacific white-sided dolphin (Lagenorhynchus obliquidens), striped dolphin (Stenella coeruleoalba), common bottlenose dolphin (Tursiops truncatus), Risso’s dolphin (Grampus griseus), Dall’s porpoise (Phocoenoides dalli), sperm whale (Physeter macrocephalus), blue whale (Balaenoptera musculus), fin whale (B. physalus), humpback whale (Megaptera novaeangliae), Baird’s beaked whale (Berardius bairdii), and a “small beaked whale guild” that included Mesoplodonts (Mesoplodon spp.) and Cuvier’s beaked whale (Ziphius cavirostris). Sample sizes were also sufficient to develop the first model-based density estimates for minke whale (B. acutorostrata) in this study area.

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License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Date October 17, 2023
Metadata Created Date March 19, 2021
Metadata Updated Date November 10, 2023
Reference Date(s) December 1, 2020 (publication)
Frequency Of Update irregular

Metadata Source

Harvested from NMFS OST

Additional Metadata

Resource Type Dataset
Metadata Date October 17, 2023
Metadata Created Date March 19, 2021
Metadata Updated Date November 10, 2023
Reference Date(s) December 1, 2020 (publication)
Responsible Party (Point of Contact, Custodian)
Contact Email
Guid gov.noaa.nmfs.inport:64349
Access Constraints Cite As: NMFS Office of Science and Technology, [Date of Access]: Predictive Models of Cetacean Densities in the California Current Ecosystem, 2020b [Data Date Range],, Use Constraints: *** No Warranty*** The user assumes the entire risk related to its use of these data. NMFS is providing these data "as is," and NMFS disclaims any and all warranties, whether express or implied, including (without limitation) any implied warranties of merchantability or fitness for a particular purpose. No warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. It is strongly recommended that careful attention be paid to the contents of the metadata file associated with these data to evaluate dataset limitations, restrictions or intended use. In no event will NMFS be liable to you or to any third party for any direct, indirect, incidental, consequential, special or exemplary damages or lost profit resulting from any use or misuse of these data.
Bbox East Long -117.097556
Bbox North Lat 48.5061
Bbox South Lat 30.05
Bbox West Long -131
Coupled Resource
Frequency Of Update irregular
Harvest Object Id 271e15d7-519f-49db-ae32-a3500a946759
Harvest Source Id f9290d59-efab-4b58-a20f-a0e82126966c
Harvest Source Title NMFS OST
Licence NOAA provides no warranty, nor accepts any liability occurring from any incomplete, incorrect, or misleading data, or from any incorrect, incomplete, or misleading use of the data. It is the responsibility of the user to determine whether or not the data is suitable for the intended purpose.
Metadata Language eng
Metadata Type geospatial
Old Spatial {"type": "Polygon", "coordinates": [[[-131.0, 30.05], [-117.097556, 30.05], [-117.097556, 48.5061], [-131.0, 48.5061], [-131.0, 30.05]]]}
Progress completed
Spatial Data Service Type
Spatial Reference System EPSG::4326
Spatial Harvester True
Temporal Extent Begin 1991-07-01T00:00:00Z
Temporal Extent End 1991-11-30T00:00:00Z

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