Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/119458
Title: Year-round movements of a small seabird and oceanic isotopic gradient in the tropical Atlantic
Author: Zajková, Zuzana
Militão, Teresa
González-Solís, Jacob
Keywords: Ocells marins
Isòtops estables en ecologia
Migració d'ocells
Sea birds
Stable isotopes in ecological research
Birds migration
Issue Date: 14-Sep-2017
Publisher: Inter-Research
Abstract: Despite the proliferation of seabird tracking studies, there is a relative paucity of studies on small tropical seabirds. We present for the first time the distribution and movements of the little-known Boyd's shearwater Puffinus boydi, a Procellariiform endemic to the Cape Verde Islands. We tracked 28 birds from 2 breeding sites (Ilhéu Raso and Ilhéu de Cima) with geolocator loggers from 2007 to 2012. We also analysed stable isotopes of carbon and nitrogen in the 1st primary (P1), the 6th rectrice (R6) and the 1st (S1) and 8th (S8) secondary feathers to reveal moulting pattern and oceanic isotopic gradients. Birds migrated on average 1452 km westward, to the central Atlantic Ocean (5 to 15°N, 30 to 40°W), where they stayed on average 114 d, from May to August. Boyd's shearwaters exploited oceanic waters year-round and showed δ13C values similar to other oceanic seabird species and δ15N values indicating the lowest known trophic level among all central Atlantic seabirds. Isotope values in flight feathers suggest most animals moult their P1 and R6 around the breeding ground, whereas all birds moult S1 and S8 at the non-breeding quarters. Correlations of δ13C and δ15N values from S8 with the longitude of the non-breeding area indicate the existence of large-scale isotopic gradients matching those known at baseline levels. Combining geolocator tracking and stable isotope analyses in feathers not only allowed us to describe in detail the annual life cycle and distribution of the species, but also the oceanic isotopic gradients in the tropical Atlantic.
Note: Reproducció del document publicat a: https://doi.org/10.3354/meps12269
It is part of: Marine Ecology Progress Series, 2017, vol. 579, p. 169-183
URI: http://hdl.handle.net/2445/119458
Related resource: https://doi.org/10.3354/meps12269
ISSN: 0171-8630
Appears in Collections:Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)
Articles publicats en revistes (Institut de Recerca de la Biodiversitat (IRBio))

Files in This Item:
File Description SizeFormat 
675701.pdf3.03 MBAdobe PDFView/Open    Request a copy


Embargat   Document embargat fins el 14-9-2022


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.