Volume 44, No. 1



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Changing breeding status of the Ashy Storm-Petrel Oceanodroma homochroa on Anacapa Island, California


Authors

A. LAURIE HARVEY1,2, DAVID M. MAZURKIEWICZ2, MATTHEW W. McKOWN3, KEVIN W. BARNES2,4 & MICHAEL W. PARKER5

1Channel Islands National Park, 1901 Spinnaker Drive, Ventura, CA 93001, USA
2Current address: Sutil Conservation Ecology, 30 Buena Vista Avenue, Fairfax, CA 94930, USA (laurie_harvey@seabirds.org.in)
3Conservation Metrics, Inc., 100 Shaffer Road, Santa Cruz, CA 95060, USA
4Current address: US Fish and Wildlife Service, 922 Bootlegger Trail Great Falls, MT 59404, USA
5California Institute of Environmental Studies,3408 Whaler Avenue, Davis, CA 95616, USA


Received 3 July 2015, accepted 17 February 2016

Date Pubished: 2016/04/15
Date Online: 2017/02/28


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Citation

HARVEY, A.L., MAZURKIEWICZ, D.M., McKOWN, M.W., BARNES, K.W. & PARKER, M.W. 2016. Changing breeding status of the Ashy Storm-Petrel Oceanodroma homochroa on Anacapa Island, California. Marine Ornithology 44: 93-97.


Key words: Ashy storm-petrel, California Channel Islands, Anacapa Island, rat eradication, recolonization.


Abstract

Ashy Storm-Petrels (ASSP) breed in a range restricted to the southern California Current, from Mendocino County in northern California, United States, to the Coronado Islands in northwest Baja California, Mexico. Approximately half the global population nests on the California Channel Islands, but nesting at one of them, Anacapa Island, had not been recorded before this study. In 2011, 10 years after rats were eradicated, we conducted a study to determine the breeding status of ASSP on Anacapa Island. We used habitat searches coupled with acoustic sensors to assess potential nesting areas and conducted mist netting to determine general presence. We found one active nest containing a nearly fledged ASSP chick in 2011, representing the first breeding record for the island.


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