Seabird Spring Survey Compilation: Observations from various surveys between 1975 and 2008

Mar 22, 2017 (Last modified Jan 15, 2021)
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Description:

Compilation of 29 surveys varying in survey methods, temporal and geographic extent along the California coast.


Seabird distribution layers are from CDAS, a compilation of at-sea survey data maintained by RG Ford Consulting Company under contract to CDFW-OSPR. The seabird layers here show mean density (weighted to survey effort) from the following surveys, from 1975 through 2008.


For more details please view "Data Layers" tab for survey methods from CDAS 3.11 documentation.


Data are divided into the four following seasons:

Spring = March, April, May

Summer = June, July, August

Fall = September, October, November

Winter = December, January, February


Data are shown as density (birds per km2) in a grid of 5 latitude by 5 longitude.


Attribute codes are from Briggs, K. T., D. G. Ainley, D. R. Carlson, D. B. Lewis, W. B. Tyler, L. B. Spear, and L. A. Ferris. 1987. Final

Report: California Seabird Ecology Study. Prepared by the Institute of Marine Sciences, University of California, Santa Cruz, for the Pacific OCS Region, Minerals Management Service, Contract No. 14-12-001-30183. vii and 153 pp.
Data Provided By:
Seabird distribution layers are from CDAS, a compilation of at-sea survey data maintained by RG Ford Consulting Company under contract to CDFW-OSPR. See layer details section for more credits.

Processed by Annie Jacobs, Conservation Biology Institute
Content date:
1975 to 2008
Contact Organization:
CDFW - OSPR
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These data may be distributed freely. Please cite this compilation and the original studies.
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Tags:
aerial surveys, small boat surveys, ship surveys, survey
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