Breeding Status of the Red-Tailed Tropicbird (Phaethon rubricauda) and Threats to Its Conservation on Easter Island (Rapa Nui)1

Marcelo Flores, Pedro Lazo, Graciela Campbell, Alejandro Simeone

Resultado de la investigación: Research - revisión exhaustivaArticle

Resumen

Easter Island is located in the southeastern corner of Polynesia. This 163.6 km2 volcanic island is one of the most isolated places on Earth. During spring 2014 and 2015, we studied a breeding colony of Red-tailed Tropicbirds (Phaethon rubricauda) located on Rano Raraku Volcano. We specifically aimed to determine (1) main nest types used by tropicbirds, (2) nest distribution and abundance, (3) breeding success, and (4) threats faced by tropicbirds at this colony. Results showed presence of four nest types: Rock caves, moai nest, rockprotected, and vegetation nests. Nests were strongly associated with unfinished moai statues. Breeding success ranged from 37% in 2014 to 26% in 2015. Camera traps and direct observations showed interactions with five invasive alien species: The raptor Chimango Caracara (Milvago chimango) was the most severe predator of unattended eggs and chicks; cats were observed close to adult birds; dogs killed fledglings; ants preyed on newborn chicks; rats were recorded inspecting both occupied and unoccupied nests. We suggest that this is a relatively new and expanding colony. Urgent measures to control and/or eradicate invasive alien species on Rano Raraku are needed to improve breeding success and persistence of this colony in the future.

IdiomaEnglish
Páginas149-160
Número de páginas12
PublicaciónPacific Science
Volumen71
Número de edición2
DOI
EstadoPublished - 1 abr 2017

Huella dactilar

Pacific Ocean Islands
nests
breeding
Phaethon
invasive species
chicks
Polynesia
volcanoes
birds of prey
caves
cameras
Formicidae
neonates
traps
rocks
cats
predators
vegetation
dogs
birds

ASJC Scopus subject areas

  • General

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title = "Breeding Status of the Red-Tailed Tropicbird (Phaethon rubricauda) and Threats to Its Conservation on Easter Island (Rapa Nui)1",
abstract = "Easter Island is located in the southeastern corner of Polynesia. This 163.6 km2 volcanic island is one of the most isolated places on Earth. During spring 2014 and 2015, we studied a breeding colony of Red-tailed Tropicbirds (Phaethon rubricauda) located on Rano Raraku Volcano. We specifically aimed to determine (1) main nest types used by tropicbirds, (2) nest distribution and abundance, (3) breeding success, and (4) threats faced by tropicbirds at this colony. Results showed presence of four nest types: Rock caves, moai nest, rockprotected, and vegetation nests. Nests were strongly associated with unfinished moai statues. Breeding success ranged from 37% in 2014 to 26% in 2015. Camera traps and direct observations showed interactions with five invasive alien species: The raptor Chimango Caracara (Milvago chimango) was the most severe predator of unattended eggs and chicks; cats were observed close to adult birds; dogs killed fledglings; ants preyed on newborn chicks; rats were recorded inspecting both occupied and unoccupied nests. We suggest that this is a relatively new and expanding colony. Urgent measures to control and/or eradicate invasive alien species on Rano Raraku are needed to improve breeding success and persistence of this colony in the future.",
author = "Marcelo Flores and Pedro Lazo and Graciela Campbell and Alejandro Simeone",
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Breeding Status of the Red-Tailed Tropicbird (Phaethon rubricauda) and Threats to Its Conservation on Easter Island (Rapa Nui)1. / Flores, Marcelo; Lazo, Pedro; Campbell, Graciela; Simeone, Alejandro.

En: Pacific Science, Vol. 71, N.º 2, 01.04.2017, p. 149-160.

Resultado de la investigación: Research - revisión exhaustivaArticle

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