Skip to main content
WCS
Menu
Library
Library Catalog
eJournals & eBooks
WCS Research
Archives
Research Use
Finding Aids
Digital Collections
WCS History
WCS Research
Research Publications
Science Data
Services for WCS Researchers
Archives Shop
Bronx Zoo
Department of Tropical Research
Browse By Product
About Us
FAQs
Intern or Volunteer
Staff
Donate
Search WCS.org
Search
search
Popular Search Terms
WCS History
Library and Archives
Library and Archives Menu
Library
Archives
WCS Research
Archives Shop
About Us
Donate
en
fr
Title
Status of breeding birds at Observatorio and Goffré Islands, Argentina
Author(s)
Ulises, Balza; Marcela, Liljesthröm; Lida, Pimper; Ignacio, Franco-Navarro; Silvia, Cañas-Barrovecchio; Francisco, Zunino; Ignacio, Domato; Soraya, Acardi; Rodrigo, Iturraspe; Joaquín, Cano; Andrea, Raya-Rey
Published
2022
Publisher
Polar Biology
Published Version DOI
https://doi.org/10.1007/s00300-022-03019-2
Pre-Publication DOI
DOI for Open Access preprint or postprint version of article
10.5281/zenodo.6926579
Abstract
Continental islands are often sites of low diversity and endemism, as well as important areas for the protection of bird populations, especially seabirds. On Isla Observatorio and the Año Nuevo Islands, in the Southwestern Atlantic, the latest assessment of avifauna dates from more than 20 years ago. In this study, we use a combination of methods to update the status of the main seabird colonies and the most abundant avian terrestrial predator at Observatorio and Goffré Islands during the breeding season. In only 4.5 km2, the islands would harbour ~ 90,000 breeding seabirds. Seabird colonies occupied different areas of the islands and varied in their population status, with Imperial Shags (Leucocarbo atriceps) showing an increase and Southern Giant Petrels (Macronectes giganteus) a decrease according to the last surveys. Magellanic Penguin (Spheniscus magellanicus) population estimations also suggest a decrease but the last survey was based on total, and not on occupied nest sites. We recorded and assessed one new breeding species: The globally near-threatened Striated Caracara (Phalcoboenus australis), which has an important breeding population of around 15 territorial pairs at Observatorio Island. These islands appear to be an important regional bird site and future studies would determine their trends and threats, especially those related with invasive species.
Keywords
population assessment; vegetation classification; point centred quarter method; continental islands
Access Full Text
A full-text copy of this article may be available. Please email the
WCS Library
to request.
Back
PUB27290