FN Archimer Export Format
PT J
TI Inter-Annual Variability of Fledgling Sex Ratio in King Penguins
BT 
AF BORDIER, Celia
   SARAUX, Claire
   VIBLANC, Vincent A.
   GACHOT-NEVEU, Helene
   BEAUGEY, Magali
   LE MAHO, Yvon
   LE BOHEC, Céline
AS 1:1,2;2:1,2,3,4;3:1,2,5;4:1,2;5:1,2;6:1,2,6;7:1,2,6,7;
FF 1:;2:PDG-RBE-HM-RHSETE;3:;4:;5:;6:;7:;
C1 Université de Strasbourg, Institut Pluridisciplinaire Hubert Curien, Laboratoire International Associé LIA-647 BioSensib, Strasbourg, France
   CNRS, UMR-7178, LIA-647 BioSensib, Strasbourg, France
   AgroParisTech ENGREF, Paris, France
   IFREMER – UMR 212– Ecosystème Marin Exploité, Sète, France
   Centre d’Ecologie Fonctionnelle et Evolutive, Equipe Ecologie Comportementale, UMR 5175 CNRS, Montpellier, France
   Centre Scientifique de Monaco, LIA-647 BioSensib, Principality of Monaco
   University of Oslo, Centre for Ecological and Evolutionary Synthesis, Department of Biosciences, Blindern, Norway
C2 UNIV STRASBOURG, FRANCE
   CNRS, FRANCE
   AGROPARISTECH, FRANCE
   IFREMER, FRANCE
   CEFE, FRANCE
   CTR SCI MONACO, MONACO
   UNIV OSLO, NORWAY
SI SETE
SE PDG-RBE-HM-RHSETE
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
IF 3.234
TC 4
UR https://archimer.ifremer.fr/doc/00248/35916/34452.pdf
LA English
DT Article
AB As the number of breeding pairs depends on the adult sex ratio in a monogamous species with biparental care, investigating sex-ratio variability in natural populations is essential to understand population dynamics. Using 10 years of data (20002009) in a seasonally monogamous seabird, the king penguin (Aptenodytes patagonicus), we investigated the annual sex ratio at fledging, and the potential environmental causes for its variation. Over more than 4000 birds, the annual sex ratio at fledging was highly variable (ranging from 44.4% to 58.3% of males), and on average slightly biased towards males (51.6%). Yearly variation in sex-ratio bias was neither related to density within the colony, nor to global or local oceanographic conditions known to affect both the productivity and accessibility of penguin foraging areas. However, rising sea surface temperature coincided with an increase in fledging sex-ratio variability. Fledging sex ratio was also correlated with difference in body condition between male and female fledglings. When more males were produced in a given year, their body condition was higher (and reciprocally), suggesting that parents might adopt a sex-biased allocation strategy depending on yearly environmental conditions and/or that the effect of environmental parameters on chick condition and survival may be sex-dependent. The initial bias in sex ratio observed at the juvenile stage tended to return to 1:1 equilibrium upon first breeding attempts, as would be expected from Fisher's classic theory of offspring sex-ratio variation.
PY 2014
PD DEC
SO Plos One
SN 1932-6203
PU Public Library of Science
VL 9
IS 12
UT 000346611400027
BP 1
EP 17
DI 10.1371/journal.pone.0114052
ID 35916
ER

EF