Distribution and Abundance of Breeding Striated Caracaras in the Falkland Islands (Malvinas)
| Autor: | Micky Reeves, Keith L. Bildstein |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
Nature reserve education.field_of_study geography.geographical_feature_category Near-threatened species biology 010604 marine biology & hydrobiology Phalcoboenus Population location.country Striated caracara Zoology biology.organism_classification 010603 evolutionary biology 01 natural sciences location Geography Poa flabellata Archipelago Animal Science and Zoology Islas Malvinas education |
| Zdroj: | Journal of Raptor Research. 52:309-315 |
| ISSN: | 2162-4569 0892-1016 |
| DOI: | 10.3356/jrr-17-31.1 |
| Popis: | We conducted surveys of breeding pairs of the endemic and globally “Near Threatened” Striated Caracara (Phalcoboenus australis) on 79 outer islands in the Falklands archipelago (Islas Malvinas) during the austral-summer breeding seasons of 2013–2014 and 2014–2015. A total of 354 breeding pairs (defined as pairs with evidence of egg-laying), or an archipelago-wide adult breeding population of at least 0.05 birds/km2 was recorded. An additional 477 probable breeding pairs also were found. The distribution of breeding pairs remains similar to that found during surveys in the 1990s and 2000s. Grand Jason, Steeple Jason, New Island, Beauchene Island, and Bird Island, the five islands with the highest numbers of breeding pairs, accounted for half of the total breeding population. “Vegetationally pristine” islands with dense areas of tussac grass (Poa flabellata) and high densities of small burrowing seabirds—namely Bird Island, Saddle Island, and Beauchene Island—supported the highest densities of breeding pairs. Eighty percent of all pairs occurred on National Nature Reserves or on privately owned nature sanctuaries. Our surveys suggest that sustained protection of key breeding sites is critical for the long-term conservation of this species. We recommend that populations of Striated Caracaras at Tierra del Fuego also be surveyed and that the global population status of the species be reassessed. |
| Databáze: | OpenAIRE |
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