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This page provides links to download data collected at major seabird colonies and marine mammal rookeries by PRBO Conservation Science. Seabird productivity, population, diet, and phenology summary data are available for several colonies in central California. Marine mammal census data and productivity data are also available from the Farallon Islands.
PRBO Conservation Science requests that any parties utilizing Southeast Farallon Island (SEFI) data include the following acknowledgement “data collected by PRBO Conservation Science in collaboration with the United States Fish and Wildlife Service”. We would appreciate if you send us an e-mail to let us know the purpose of your analysis and a copy of the final product once it is completed. Parties interested in using the 5 most current years of data in their analyses or who wish to discuss potential collaborations should contact the director of PRBO's Marine Ecology Division at marinedirector@prbo.org or PRBO Conservation Science, 3820 Cypress Drive #11, Petaluma, CA 94954. To learn more about PRBO’s data sharing policy click here.
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Farallon Data
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Farallon Island Seabird Diet Summary Data
(Microsoft Excel Spreadsheet)
Diet summary data for Cassin's Auklets, Common Murres, Pigeon Guillemots, and Rhinoceros Auklets from the Farallon Islands. Data presented are the proportion by number of the most important prey items for each species.
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Farallon Island Seabird Phenology Summary Data
(Microsoft Excel Spreadsheet)
Phenology (timing of breeding) summary data for Brandt's Cormorant, Cassin's Auklet, Common Murre, Pigeon Guillemot, and Rhinoceros Auklet breeding at the Farallon Islands. Data presented are annual mean laying date for the first or only egg laid along with the standard deviation.
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Farallon Island Seabird Population Summary Data
(Microsoft Excel Spreadsheet)
Annual breeding population estimates for Brandt's Cormorant, Cassin's Auklet, Common Murre, Double-crested Cormorant, Pelagic Cormorant, Pigeon Guillemot, Tufted Puffin, and Western Gull at the Farallon Islands. Data presented are the number of breeding adults estimated for each season.
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Farallon Island Seabird Productivity Summary Data
(Microsoft Excel Spreadsheet)
Annual mean productivity for Ashy Storm-petrel, Brandt's Cormorant, Cassin's Auklet, Common Murre, Pelagic Cormorant, Pigeon Guillemot, Rhinoceros Auklet and Western Gull breeding on the Farallon Islands. Data presented are the mean number of chicks fledged per breeding pair along with the standard deviation.
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