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Impact of Semana Santa visitors on the nest success of the Yellow-footed Gull (Larus livens)on Isla Alcatraz

Project Description

The Isla Alcatraz Yellow-footed Gull colony is significant, comprised of >350 nests and an estimated 2% of the global breeding population. Previous Prescott College studies have identified the nesting season and location of Yellow-footed Gulls on Isla Alcatraz, as well as the periods of high human use on the island. Because this species nests in the spring on the beaches of the island they are susceptible to disturbance during the high human use periods around Semana Santa (Easter). Spatial distribution and nest success is monitored to assess the impact of Semana Santa visitors on the colony, to inform island management.

Project Results

Little disturbance was observed during the Easter holiday in 2009, 2010 and 2011. 

Reports & Publications

  1. Reporte de proyectos de investigación en el Área de Protección de Flora y Fauna Islas del Golfo de California (2010-11). Centro de Estudios Culturales y Ecológicos Prescott College A. C., Bahía Kino, Sonora
  2. Reporte de proyectos de investigación en el Area de Proteccion de Flora y Fauna Islas del Golfo de California (2009-2010). Centro de Estudios Culturales y Ecológicos Prescott College A. C., Bahía Kino, Sonora
  3. Research and Conservation Program Report (2007-2011). Prescott College Kino Bay Center for Cultural and Ecological Studies