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Breeding abundance and population trend of the Peruvian Diving-petrel Pelecanoides garnotii in Chile: Recovery of an endangered seabird?

Published online by Cambridge University Press:  14 November 2019

CLAUDIA E. FERNÁNDEZ ,
MATÍAS PORTFLITT-TORO Open the ORCID record for MATÍAS PORTFLITT-TORO [Opens in a new window] ,
DIEGO MIRANDA-URBINA ,
PAULA PLAZA ,
NICOLAS LUNA  and
GUILLERMO LUNA-JORQUERA Open the ORCID record for GUILLERMO LUNA-JORQUERA [Opens in a new window]
CLAUDIA E. FERNÁNDEZ
Affiliation:
Doctorado en Biología y Ecología Aplicada, Universidad Católica del Norte, Coquimbo, Chile.
MATÍAS PORTFLITT-TORO
Affiliation:
Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile. Millenium Nucleus for Ecology and Sustainable Management of Oceanic Islands.
DIEGO MIRANDA-URBINA
Affiliation:
Instituto de Ciencias Biológicas, Universidad de Talca, Chile.
PAULA PLAZA
Affiliation:
Doctorado en Biología y Ecología Aplicada, Universidad Católica del Norte, Coquimbo, Chile. Millenium Nucleus for Ecology and Sustainable Management of Oceanic Islands. Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Coquimbo, Chile.
NICOLAS LUNA
Affiliation:
Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile. Millenium Nucleus for Ecology and Sustainable Management of Oceanic Islands.
GUILLERMO LUNA-JORQUERA*
Affiliation:
Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo, Chile. Millenium Nucleus for Ecology and Sustainable Management of Oceanic Islands. Centro de Estudios Avanzados en Zonas Áridas (CEAZA), Coquimbo, Chile.
*
*Author for correspondence; e-mail: gluna@ucl.cl
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Summary

As island ecosystems are among the most critical breeding habitats for seabirds, their protection should enhance population viability for many species. The Peruvian Diving-petrel Pelecanoides garnotii breeds only in Chile and Perú, is an endangered seabird with historically large populations of over 100,000 breeding pairs, but fewer than 1,000 remained in the 1980s and it became the first endangered seabird of the Humboldt Current System. In Chile, they breed on five islands, three of which are legally protected, but only two have a management plan. Between 2010 and 2014, we evaluated the density of nests, burrow occupancy, and colony patch sizes on the islands to estimate the breeding population. The population trend was assessed by compiling historical data available in the literature and several unpublished technical reports. The current breeding population size in Chile was ∼12,500 breeding pairs (95% CI: 10,613–14,676 pairs) that is ∼34% of the breeding pairs reported for Peru (∼36,450 pairs). Choros Island, the only island with adequate protection, accounted for ∼95% of the total breeding population of the Peruvian Diving-petrel in Chile. Historical population trends showed a significant increase in breeding pairs during recent years on Choros Island. It seems that the adequate legal protection of Choros Island is leading to the recovery of Peruvian Diving-petrels, demonstrating that protection of breeding colonies remains an essential strategy for the conservation of endemic seabirds.

Type
Research Article
Information
Bird Conservation International , Volume 30 , Issue 3 , September 2020 , pp. 423 - 433
Copyright
© BirdLife International, 2019

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