© Pablo Petracci
Olrog’s Gull (Larus atlanticus) is an endemic species of the Southwestern Atlantic, breeding exclusively along coastal sites in Argentina. The largest reproductive colonies are found in Bahía San Blas, in the province of Buenos Aires, with smaller colonies located to the north of Golfo San Jorge, in the province of Chubut. The species is classified as “Vulnerable” in Argentina (MAyDS and AA, 2017) and as “Near Threatened” globally (BirdLife International, 2018). The main threats to the species include habitat loss due to coastal development, interactions with unregulated human activities, and the presence of invasive species.
Tablas de estado de especie por año
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2021
CITATION CONSERVATION STATUS (IUCN criteria) Global Near Threatened, 2018 1 Regional – Patagonian Sea Near Threatened, 2016 9 Argentina Near Threatened, 2015 2 POPULATION SIZE (Breeding pairs) Global 5,900-7,800 1 Argentina (sin Islas Malvinas) 5,807 3 a 7 Isla Malvinas There are no breeding colonies South Atlantic Islands (South Georgia and the South Sandwich Islands) There are no breeding colonies POPULATION TREND Global Stable 1 Argentina (sin Islas Malvinas) Stable 3 a 7 Isla Malvinas There are no breeding colonies South Atlantic Islands (South Georgia and the South Sandwich Islands) There are no breeding colonies CURRENT SITUATION IN ARGENTINA Total Number of Registered Colonies in Argentina 24 3 a 7 Number of Protected Colonies in Argentina 23 3 a 8 Number of Colonies with Increasing Population Trends 1 3 a 7 Number of Colonies with Decreasing Population Trends 0 3 a 7 Number of Colonies with Stable Population Trends 7 3 a 7 Number of Colonies with Unknown Population Trends 16 3 a 7
Protected areas with the presence of colonies
- Reserva Natural Islote de la Gaviota Cangrejera
- Reserva Natural Provincial de uso Múltiple Bahía Blanca, Bahía Falsa y Bahía verde
- Refugio de vida Silvestre y Reserva Natural de Uso Múltiple Bahía San Blás
- Parque Interjurisdiccional Marino Costero Patagonia Austral
Marine areas of intensive use by the species
- Costas de BA, Uruguay y sur de Brasil
Protected marine areas within areas of intensive use by the species
- Reserva Natural Islote de la Gaviota Cangrejera
- Reserva Natural Provincial de uso Múltiple Bahía Blanca, Bahía Falsa y Bahía verde
- Refugio de vida Silvestre y Reserva Natural de Uso Múltiple Bahía San Blás
- Parque Interjurisdiccional Marino Costero Patagonia Austral
REFERENCES:
- BirdLife International. 2018. Larus atlanticus. The IUCN Red List of Threatened Species 2018: e.T22694286A132538305. https://www.iucnredlist.org/species/22694286/132538305
- Ministerio de Ambiente y Desarrollo Sustentable y Aves Argentina. (2017). Categorización de las Aves de la Argentina (2015). Informe del Ministerio de Ambiente y Desarrollo Sustentable de la Nación y de Aves Argentinas, edición electrónica. Buenos Aires, Argentina.
- Yorio, P., Petracci, P., Borboroglu, P.G. (2013). Current status of the threatened Olrog’s Gull Larus atlanticus: global population, breeding distribution and threats. Bird Conservation International 23, 477–486.
- Yorio, P., Frere, E., Gandini, P., Harris, G. (1998). Atlas de la distribución reproductiva de aves marinas en el litoral patagónico argentino. Fundación Patagonia Natural y Wildlife Conservation Society, Buenos Aires, Argentina.
- Suarez, N.M., Marinao, C.J., Kasinsky Aguilera, L.T., Yorio, P.M. (2014). Distribución reproductiva y abundancia de gaviotas y gaviotines en el área natural protegida Bahía San Blas, Buenos Aires. Hornero 29, 29–36.
- Copello, S., Suarez, N., Yorio, P., Ravasi, M.T., PAZ, J., Borboroglu, P., Grilli, M., Favero, M., Seco Pon, J.P. (2020). Distribution of Olrog’s Gull Larus atlanticus from Bahía San Blas during the non-breeding period: signals of partial migration. Bird Conservation International 1–10.
- Yorio, P., Bertellotti, M., Borboroglu, P. (2005). Estado poblacional y de conservación de gaviotas que se reproducen en el litoral marítimo argentino. Hornero 20, 53–74.
- WCS Argentina Database – Marine Program
- Falabella V., Tamini L., García Borboroglu P., Frere E., Seco Pon J.P., Simeone Cabrera A., Stanworth A., Suazo C., Campagna C. (2019). Informe del Primer Taller Regional de Evaluación del Estado de Conservación de Especies para el Mar Patagónico según criterios de la Lista Roja de UICN: Aves Marinas. Foro para la Conservación del Mar Patagónico y áreas de influencia. http://marpatagonico.org/publicaciones/