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Moult of three Tristan da Cunha seabird species sampled at sea

Published online by Cambridge University Press:  21 November 2014

Leandro Bugoni ,
Liliana C. Naves  and
Robert W. Furness
Leandro Bugoni*
Affiliation:
College of Medical, Veterinary and Life Sciences, Graham Kerr Building, University of Glasgow, Glasgow G12 8QQ, UK Institute of Biological Sciences, Waterbirds and Sea Turtle Laboratory, Universidade Federal do Rio Grande - FURG. CP 474, CEP 96.203-900, Rio Grande, RS, Brazil
Liliana C. Naves
Affiliation:
Institute of Biological Sciences, Waterbirds and Sea Turtle Laboratory, Universidade Federal do Rio Grande - FURG. CP 474, CEP 96.203-900, Rio Grande, RS, Brazil
Robert W. Furness
Affiliation:
College of Medical, Veterinary and Life Sciences, Graham Kerr Building, University of Glasgow, Glasgow G12 8QQ, UK
*
[email protected]
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Abstract

Primary, tail and body moult of three seabirds from Tristan da Cunha archipelago were studied by castnetting offshore south Brazil from February 2006 to August 2007. Timing, duration and synchronization of primary and tail moult are described relative to the annual calendar. Body moult overlapped breeding in Atlantic yellow-nosed albatrosses (Thalassarche chlororhynchos), but tail and primary moult did not. Spectacled petrels (Procellaria conspicillata) had protracted body moult, whereas primary and tail moult were completed by August. We documented onset of primary moult during chick-rearing in spectacled petrels and great shearwaters (Puffinus gravis) of unknown breeding status, and suggest that the south-west Atlantic Ocean holds important numbers of moulting birds of both species during the summer–early autumn. The albatrosses and the spectacled petrels replaced rectrices alternately. Great shearwaters replaced rectrices outward, starting at the central pair. Primary, tail and body moult largely overlap in all three species, suggesting that the metabolic costs of primary moult may not be overly restrictive. Metabolic and nutritional ability to afford simultaneous moult of different feather tracts support the idea that impaired flight caused by wing moult is a strong factor driving no overlap of primary moult and breeding.

Keywords

Atlantic yellow-nosed albatrossgreat shearwaterProcellaria conspicillataPuffinus gravisspectacled petrelThalassarche chlororhynchos
Type
Biological Sciences
Information
Antarctic Science , Volume 27 , Issue 3 , June 2015 , pp. 240 - 251
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Copyright
© Antarctic Science Ltd 2014 

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