Hábitos granívoros en la Gaviota Cangrejera (Larus atlanticus): implicancias sobre su estatus de especialista

Pablo F. Petracci; Kaspar Delhey; Martín Sotelo

doi:10.56178/eh.v22i1.777

Short Communications Published 01 August 2007 https://doi.org/10.56178/eh.v22i1.777

Granivorous habit in Olrog’s Gull (Larus atlanticus): implications for its specialist status

Argentina Bahía Blanca diet grains Larus atlanticus Olrog’s Gull

Pablo F. Petracci Cátedra Zoología III Vertebrados, Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata. Paseo del Bosque s/n, 1900 La Plata, Buenos Aires, Argentina | Comisión de Investigaciones Científicas de la provincia de Buenos Aires

Kaspar Delhey Max Planck Institute for Ornithology, Vogelwarte Radolfzell. Alemania

Martín Sotelo Ministerio de Asuntos Agrarios. Parque Independencia, Av. Pringles s/n, 8000 Bahía Blanca, Buenos Aires, Argentina

Abstract

We report on unknown feeding habits of the Olrog’s Gull (Larus atlanticus) in the area of Ingeniero White port, Bahía Blanca, Buenos Aires Province, Argentina. Between 2002 and 2005, 281 individuals were observed feeding on grains along the shoulder of the road and in a parking lot beside the port. Feeding groups were of 2–51 individuals. This behaviour was observed mostly (78%) during high tides, when access to intertidal prey is limited. The exploitation of human resources by Larus atlanticus supports the hypothesis that this species has some degree of trophic plasticity and could behave as a generalist. We briefly review the literature on its diet, proposing an explanation for the different observations obtained along the coast of Argentina.

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References

BERÓN MP (2003) Dieta de juveniles de GaviotaCangrejera (Larus atlanticus) en estuarios de la pro-vincia de Buenos Aires. Hornero 18:113–117
BIRDLIFE INTERNATIONAL (2004) Threatened birds of theworld 2004. BirdLife International, Cambridge
BURGER J Y GOCHFELD M (1996) Family Laridae (gulls).Pp. 572–623 en: DEL HOYO J, ELLIOTT A Y SARGATAL J(eds) Handbook of the birds of the world. Volume 3.Hoatzin to auks. Lynx Edicions, Barcelona
COPELLO S Y FAVERO M (2001) Foraging ecology ofOlrog’s Gull Larus atlanticus in Mar Chiquita Lagoon(Buenos Aires, Argentina): are there age-related dif-ferences? Bird Conservation International 11:175–188
DAGUERRE JB (1933) Dos aves nuevas para la faunaargentina. Hornero 5:213–215
DELHEY JKV, CARRETE M Y MARTÍNEZ MM (2001a) Dietand feeding behaviour of Olrog’s Gull Larusatlanticus in Bahía Blanca, Argentina. Ardea89:319–329
DELHEY JKV Y PETRACCI PF (2004) Aves marinas y cos-teras del estuario de Bahía Blanca. Pp. 203–220 en:PÍCCOLO MC Y HOFFMEYER MS (eds) El ecosistema delestuario de Bahía Blanca. Instituto Argentino de Ocea-nografía, Bahía Blanca
DELHEY JKV, PETRACCI PF Y GRASSINI C (2001b) Hallaz-go de una nueva colonia de la Gaviota CangrejeraLarus atlanticus en la ría de Bahía Blanca. Hornero16:39–42
DEVILLERS P (1977) Observations at a breeding colonyof Larus (belcheri) atlanticus. Gerfaut 67:22–43
ESCALANTE R (1966) Notes on the Uruguayan popu-lation of Larus belcheri. Condor 68:507–510
HUNT GL JRY HUNT MW (1973) Habitat partitioningby foraging gulls in Maine and NorthwesternEurope. Auk 90:827–839
IUCN (1996) 1996 IUCN red list of threatened animals.IUCN, Gland
JEHL JL Y RUMBOLL MAE (1976) Notes on the avifaunaof Isla Grande and Patagonia, Argentina. Transac-tions of the San Diego Society of Natural History18:145–154
MARTÍNEZ MM, ISACCH JP Y ROJAS M (2000) Larusatlanticus: specialist or generalist? Bird ConservationInternational 10:89–92
OLROG CC (1967) Breeding of the Band-Tailed Gull(Larus belcheri) on the Atlantic coast of Argentina.Condor 69:42–48
PETRACCI PF, LA SALA LF, AGUERRE G, PÉREZ CHF,ACOSTA N, SOTELO M Y PAMPARANA C (2004) Dietade la Gaviota Cocinera (Larus dominicanus) duranteel período reproductivo en el estuario de BahíaBlanca, Buenos Aires, Argentina. Hornero 19:23–28
SPIVAK ED Y SÁNCHEZ N (1992) Prey selection by Larusbelcheri atlanticus in Mar Chiquita lagoon, BuenosAires, Argentina: a possible explanation for its dis-continuous distribution. Revista Chilena de HistoriaNatural 65:209–220
YORIO P, BERTELLOTTI M Y GARCÍA BORBOROGLU P (2005)Estado poblacional y de conservación de gaviotasque se reproducen en el litoral marítimo argentino.Hornero 20:53–74

How to cite

Pablo F. Petracci, Kaspar Delhey, Martín Sotelo (2007). Granivorous habit in Olrog’s Gull (Larus atlanticus): implications for its specialist status. El Hornero, Vol. 22 No. 1 (2007), 51-54. https://doi.org/10.56178/eh.v22i1.777

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[1] BERÓN MP (2003) Dieta de juveniles de GaviotaCangrejera (Larus atlanticus) en estuarios de la pro-vincia de Buenos Aires. Hornero 18:113–117

[2] BIRDLIFE INTERNATIONAL (2004) Threatened birds of theworld 2004. BirdLife International, Cambridge

[3] BURGER J Y GOCHFELD M (1996) Family Laridae (gulls).Pp. 572–623 en: DEL HOYO J, ELLIOTT A Y SARGATAL J(eds) Handbook of the birds of the world. Volume 3.Hoatzin to auks. Lynx Edicions, Barcelona

[4] COPELLO S Y FAVERO M (2001) Foraging ecology ofOlrog’s Gull Larus atlanticus in Mar Chiquita Lagoon(Buenos Aires, Argentina): are there age-related dif-ferences? Bird Conservation International 11:175–188

[5] DAGUERRE JB (1933) Dos aves nuevas para la faunaargentina. Hornero 5:213–215

[6] DELHEY JKV, CARRETE M Y MARTÍNEZ MM (2001a) Dietand feeding behaviour of Olrog’s Gull Larusatlanticus in Bahía Blanca, Argentina. Ardea89:319–329

[7] DELHEY JKV Y PETRACCI PF (2004) Aves marinas y cos-teras del estuario de Bahía Blanca. Pp. 203–220 en:PÍCCOLO MC Y HOFFMEYER MS (eds) El ecosistema delestuario de Bahía Blanca. Instituto Argentino de Ocea-nografía, Bahía Blanca

[8] DELHEY JKV, PETRACCI PF Y GRASSINI C (2001b) Hallaz-go de una nueva colonia de la Gaviota CangrejeraLarus atlanticus en la ría de Bahía Blanca. Hornero16:39–42

[9] DEVILLERS P (1977) Observations at a breeding colonyof Larus (belcheri) atlanticus. Gerfaut 67:22–43

[10] ESCALANTE R (1966) Notes on the Uruguayan popu-lation of Larus belcheri. Condor 68:507–510

[11] HUNT GL JRY HUNT MW (1973) Habitat partitioningby foraging gulls in Maine and NorthwesternEurope. Auk 90:827–839

[12] IUCN (1996) 1996 IUCN red list of threatened animals.IUCN, Gland

[13] JEHL JL Y RUMBOLL MAE (1976) Notes on the avifaunaof Isla Grande and Patagonia, Argentina. Transac-tions of the San Diego Society of Natural History18:145–154

[14] MARTÍNEZ MM, ISACCH JP Y ROJAS M (2000) Larusatlanticus: specialist or generalist? Bird ConservationInternational 10:89–92

[15] OLROG CC (1967) Breeding of the Band-Tailed Gull(Larus belcheri) on the Atlantic coast of Argentina.Condor 69:42–48

[16] PETRACCI PF, LA SALA LF, AGUERRE G, PÉREZ CHF,ACOSTA N, SOTELO M Y PAMPARANA C (2004) Dietade la Gaviota Cocinera (Larus dominicanus) duranteel período reproductivo en el estuario de BahíaBlanca, Buenos Aires, Argentina. Hornero 19:23–28

[17] SPIVAK ED Y SÁNCHEZ N (1992) Prey selection by Larusbelcheri atlanticus in Mar Chiquita lagoon, BuenosAires, Argentina: a possible explanation for its dis-continuous distribution. Revista Chilena de HistoriaNatural 65:209–220

[18] YORIO P, BERTELLOTTI M Y GARCÍA BORBOROGLU P (2005)Estado poblacional y de conservación de gaviotasque se reproducen en el litoral marítimo argentino.Hornero 20:53–74