A project of Gabon Olive Ridley Program.
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Species: Sooty Shearwater
Life Stage: AHY
Release Date: 2005-08-17 06:29:00
Release Location: Monterey Canyon
Last Location: 2005-10-22 07:57:51
Sooty Shearwater (Puffinus griseus) is the numerically dominant seabird in the California Current System (CCS; British Columbia to Baja Mexico) during the upwelling season from May to September. The shearwater’s affinity for fishes associated with upwelling centers, including anchovy, sardine, and juvenile rockfishes, leads to predictable aggregations in coast California. Single flocks can number in the 100s of thousands of individuals and often extend for several kilometers in narrow bands just off the coastline. Shearwaters are highly mobile, capable of traveling 800 km-1 day, and thus are able to respond to changes in oceanic conditions and prey resources over very short time scales (i.e., hours to days) while integrating information about prey availability over large spatial scales (i.e., CCS; 100,000 km2). Thus, movement patterns and habitat use of shearwaters provide a convenient measure of biological response to environmental variability within upwelling systems.