HARBOR SEAL HAULOUT BEHAVIOR IN AND NEAR MORRO BAY

Claire Q Savage; Cal Poly San Luis Obispo; csavage_@hotmail.com; Heather Liwanag

Harbor seals (Phoca vitulina) are coastal marine mammals that haul out close to areas of human activity, but they are notoriously reactive to human disturbance. There is currently no monitoring program documenting the occurrence of harbor seals along the central coast of California. Plans for a windfarm offshore of Morro Bay are likely to increase ship traffic and other human activity in the Morro Bay area. The goal of this project was to document the location and timing of harbor seal haulout behavior in Morro Bay and surrounding areas, to establish a baseline of haulout behavior prior to windfarm construction. To do this, we conducted regular ground surveys using binoculars at Estero Bluffs, Morro Bay, and Los Osos, documenting harbor seal abundance through a half tide cycle. We related harbor seal haulout behavior to abiotic factors like tide level and direction, air temperature, and wind. Preliminary results indicate that that these factors significantly affect harbor seal abundance, but in different ways at different sites. Going forward, we will conduct standardized surveys throughout the year to generate baseline data that will ultimately help us understand the impacts on increased anthropogenic activity associated with the offshore windfarm on our local harbor seals.

Poster Session   Student Paper