FN Archimer Export Format
PT J
TI At-sea behavioural ecology of the endangered MacGillivray’s prion from Saint Paul Island: combining tracking and stable isotopes
BT 
AF Delord, Karine
   Cherel, Yves
   Roy, Amédée
   Bustamante, Paco
   Swadling, Kerrie M.
   Weimerskirch, Henri
   Bost, Charles-André
   Barbraud, Christophe
AS 1:1;2:1;3:2;4:3,4;5:5;6:1;7:1;8:1;
FF 1:;2:;3:;4:;5:;6:;7:;8:;
C1 Centre d’Études Biologiques de Chizé (CEBC), UMR 7372 du CNRS-La Rochelle Université, 79360 Villiers-en-Bois, France
   Institut de Recherche pour le Développement (IRD), MARBEC (Univ. Montpellier, Ifremer, CNRS, IRD), Avenue Jean Monnet, 34200 Sète, France
   Littoral Environnement et Sociétés (LIENSs), UMR 7266 du CNRS-La Rochelle Université, 2 rue Olympe de Gouges, 17000 La Rochelle, France
   Institut Universitaire de France (IUF), 1 Rue Descartes, 75005 Paris, France
   Institute for Marine and Antarctic Studies and Australian Antarctic Program Partnership (AAPP), University of Tasmania, 20 Castray Esplanade, Battery Point, Tasmania 7004, Australia
C2 CNRS, FRANCE
   IRD, FRANCE
   UNIV LA ROCHELLE, FRANCE
   INST UNIV FRANCE, FRANCE
   UNIV TASMANIA, AUSTRALIA
UM MARBEC
IN WOS Cotutelle UMR
   copubli-france
   copubli-univ-france
   copubli-int-hors-europe
IF 2.5
TC 0
UR https://archimer.ifremer.fr/doc/00801/91306/98148.pdf
LA English
DT Article
DE ;Pachyptila macgillivrayi;At-sea distribution;Activity pattern;Southern Indian Ocean;Geolocation;GPS;Seabirds;Bill width;Trophic position
AB Seabirds play important roles as marine ecosystem sentinels. Studying their at-sea ecology is essential for understanding how environmental variability affects their populations. However, the at-sea ecology of small-sized temperate seabirds remains poorly studied. We explored the at-sea ecology of the Critically Endangered MacGillivray’s prion Pachyptila macgillivrayi breeding on the subtropical Saint Paul Island. Using global location sensor loggers and stable isotope analysis, we investigated movements, migratory strategies, at-sea activity and moulting period, and characterized the isotopic niche of tracked individuals. During incubation, MacGillivray’s prions remained in temperate waters north of the Subtropical Front, possibly feeding on prey caught in cold eddies. During the inter-breeding period, individuals wintered almost equally to the north and south of the Subtropical Front in 2 distinct sectors (Tasman Sea and Southwest Indian Ridge). Daily activity varied seasonally, and individuals overwintering in the Tasman Sea spent more time flying at night when moonlight intensity was high. Moulting occurred after the breeding period and lasted longer compared to other prion species. Isotopic data suggest a higher dietary proportion of low trophic-level prey for MacGillivray’s prions than for Antarctic and slender-billed prions, highlighting trophic segregation in relation to bill width. Our study provides new evidence to understand the suite of adaptations allowing the abundant prion species to coexist by feeding on prey of different sizes. Contrary to the majority of seabird species, MacGillivray’s prions from Saint Paul Island exhibited 2 migratory tactics with associated differences in at-sea activity, leading to questions about the origin of these differences. 
PY 2022
PD SEP
SO Marine Ecology Progress Series
SN 0171-8630
PU Inter-Research Science Center
VL 697
UT 000865793900011
BP 149
EP 165
DI 10.3354/meps14136
ID 91306
ER

EF