Breeding distribution and abundance of seabirds on islands off north-central Chile

Between 1999 and 2003 we collected information on the breeding distribution and abundance of 12 seabird species occurring on nine islands off the coasts of north and central Chile (27°-33°S). The Peruvian booby Sula variegata was the most abundant seabird with a breeding population of ca. 18,000 pai...

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Autores principales: SIMEONE,ALEJANDRO, LARA-JORQUERA,GUILLERMO, BERNAL,MARIANO, GARTHE,STEFAN, SEPÚLVEDA,FELIPE, VILLABLANCA,ROBERTO, ELLENBERG,URSULA, CONTRERAS,MACARENA, MUÑOZ,JULIETA, PINCE,TAMARA
Lenguaje:English
Publicado: Sociedad de Biología de Chile 2003
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Acceso en línea:http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000200016
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spelling oai:scielo:S0716-078X20030002000162003-10-09Breeding distribution and abundance of seabirds on islands off north-central ChileSIMEONE,ALEJANDROLARA-JORQUERA,GUILLERMOBERNAL,MARIANOGARTHE,STEFANSEPÚLVEDA,FELIPEVILLABLANCA,ROBERTOELLENBERG,URSULACONTRERAS,MACARENAMUÑOZ,JULIETAPINCE,TAMARA aves marinas colonia reproductiva abundancia conservación corriente de Humboldt Chile Between 1999 and 2003 we collected information on the breeding distribution and abundance of 12 seabird species occurring on nine islands off the coasts of north and central Chile (27°-33°S). The Peruvian booby Sula variegata was the most abundant seabird with a breeding population of ca. 18,000 pairs concentrated in two islands, followed by the Humboldt penguin Spheniscus humboldti with ca. 9,000 pairs, the largest colony being at Chañaral Island with ca. 7,000 pairs. Kelp gulls Larus dominicanus bred at all the surveyed sites in colonies of variable size, ranging from 40 to 2,000 pairs. Peruvian diving-petrels Pelecanoides garnotii and Peruvian pelicans Pelecanus occidentalis bred at restricted sites, but generally in large colonies. Magellanic penguins Spheniscus magellanicus, wedge-rumped storm-petrels Oceanodroma tethys, Neotropical cormorants Hypoleucos brasiliensis, guanay cormorants Leucocarbo bougainvillii, red-legged cormorants Stictocarbo gairmardi, band-tailed gulls Larus belcheri and Inca terns Larosterna inca nested at few sites forming small colonies (from a few to 150 pairs). Two new breeding sites are reported for the Peruvian diving-petrel and nesting of the wedge-rumped storm-petrel is confirmed on the Chilean coast for the first time. Despite protective status, most of the islands showed human disturbance, derived mainly from guano harvesting, egging and tourism. On at least five of these islands we were able to confirm introduced mammals including rats, rabbits and cats. These factors are likely to be detrimental to seabirds and thus demand detailed assessment. Further comprehensive ornithological surveys in other areas are needed so as to improve the scarce knowledge that we currently have on the seabird populations along the Chilean coastinfo:eu-repo/semantics/openAccessSociedad de Biología de ChileRevista chilena de historia natural v.76 n.2 20032003-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000200016en10.4067/S0716-078X2003000200016
institution Scielo Chile
collection Scielo Chile
language English
topic aves marinas
colonia reproductiva
abundancia
conservación
corriente de Humboldt
Chile
spellingShingle aves marinas
colonia reproductiva
abundancia
conservación
corriente de Humboldt
Chile
SIMEONE,ALEJANDRO
LARA-JORQUERA,GUILLERMO
BERNAL,MARIANO
GARTHE,STEFAN
SEPÚLVEDA,FELIPE
VILLABLANCA,ROBERTO
ELLENBERG,URSULA
CONTRERAS,MACARENA
MUÑOZ,JULIETA
PINCE,TAMARA
Breeding distribution and abundance of seabirds on islands off north-central Chile
description Between 1999 and 2003 we collected information on the breeding distribution and abundance of 12 seabird species occurring on nine islands off the coasts of north and central Chile (27°-33°S). The Peruvian booby Sula variegata was the most abundant seabird with a breeding population of ca. 18,000 pairs concentrated in two islands, followed by the Humboldt penguin Spheniscus humboldti with ca. 9,000 pairs, the largest colony being at Chañaral Island with ca. 7,000 pairs. Kelp gulls Larus dominicanus bred at all the surveyed sites in colonies of variable size, ranging from 40 to 2,000 pairs. Peruvian diving-petrels Pelecanoides garnotii and Peruvian pelicans Pelecanus occidentalis bred at restricted sites, but generally in large colonies. Magellanic penguins Spheniscus magellanicus, wedge-rumped storm-petrels Oceanodroma tethys, Neotropical cormorants Hypoleucos brasiliensis, guanay cormorants Leucocarbo bougainvillii, red-legged cormorants Stictocarbo gairmardi, band-tailed gulls Larus belcheri and Inca terns Larosterna inca nested at few sites forming small colonies (from a few to 150 pairs). Two new breeding sites are reported for the Peruvian diving-petrel and nesting of the wedge-rumped storm-petrel is confirmed on the Chilean coast for the first time. Despite protective status, most of the islands showed human disturbance, derived mainly from guano harvesting, egging and tourism. On at least five of these islands we were able to confirm introduced mammals including rats, rabbits and cats. These factors are likely to be detrimental to seabirds and thus demand detailed assessment. Further comprehensive ornithological surveys in other areas are needed so as to improve the scarce knowledge that we currently have on the seabird populations along the Chilean coast
author SIMEONE,ALEJANDRO
LARA-JORQUERA,GUILLERMO
BERNAL,MARIANO
GARTHE,STEFAN
SEPÚLVEDA,FELIPE
VILLABLANCA,ROBERTO
ELLENBERG,URSULA
CONTRERAS,MACARENA
MUÑOZ,JULIETA
PINCE,TAMARA
author_facet SIMEONE,ALEJANDRO
LARA-JORQUERA,GUILLERMO
BERNAL,MARIANO
GARTHE,STEFAN
SEPÚLVEDA,FELIPE
VILLABLANCA,ROBERTO
ELLENBERG,URSULA
CONTRERAS,MACARENA
MUÑOZ,JULIETA
PINCE,TAMARA
author_sort SIMEONE,ALEJANDRO
title Breeding distribution and abundance of seabirds on islands off north-central Chile
title_short Breeding distribution and abundance of seabirds on islands off north-central Chile
title_full Breeding distribution and abundance of seabirds on islands off north-central Chile
title_fullStr Breeding distribution and abundance of seabirds on islands off north-central Chile
title_full_unstemmed Breeding distribution and abundance of seabirds on islands off north-central Chile
title_sort breeding distribution and abundance of seabirds on islands off north-central chile
publisher Sociedad de Biología de Chile
publishDate 2003
url http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-078X2003000200016
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