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Satellite Tracking

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49053

Trans-Pacific Migration of the Sooty Shearwater: 2004

A project of Pacific Procellariid Research Consortium.


click map for full-size version
This map shows high-quality locations and trackline for male Sooty Shearwater 49053 during July - August 2004. This animal identified significant habitat "hotspots" off north America including, Monterey and San Luis Bays, and off the San Francisco Bay and Columbia River plumes.

Full-Size Map (49KB)
Zoom Map (134KB)

Species: Sooty Shearwater
Life Stage: Sub-Adult to Adult
Gender: Male
Release Date: 2004-07-04 08:18:00
Release Location: Capitola
Last Location: 2004-08-07 12:12:15

Background

Sooty Shearwaters are the most abundant and perhaps the most conspicuous seabird observed off the west coast of North America during May to September- single flocks can number in the 10–100s of thousands of individuals. Shearwaters that have migrated here from breeding colonies in New Zealand and Chile rely on abundant and predictable concentrations of prey to rebuild energy reserves, undergo energetically expensive molt, and store lipids prior to re-migration across the Pacific. The energetic requirements of such massive flocks require that they locate and forage successfully on large shoals of forage fish such as anchovy and sardine. It has been estimated that Sooty Shearwaters off Oregon consume more than 24,000 MT of anchovies per year.


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