FN Archimer Export Format
PT J
TI Energetic adjustments in freely breeding-fasting king penguins: does colony density matter?
BT 
AF VIBLANC, Vincent A.
   SARAUX, Claire
   MALOSSE, Nelly
   GROSCOLAS, Rene
AS 1:1,2,3;2:1,2,4;3:1,2;4:1,2;
FF 1:;2:PDG-RBE-HM-RHSETE;3:;4:;
C1 Univ Strasbourg, IPHC, F-67087 Strasbourg, France.
   CNRS, UMR 7178, F-67087 Strasbourg, France.
   CNRS, UMR 5175, Equipe Ecol Comportementale, Ctr Ecol Fonct & Evolut, F-34293 Montpellier, France.
   IFREMER, Stn Sete, Lab Ressources Halieut Sete, Sete, France.
C2 UNIV STRASBOURG, FRANCE
   CNRS, FRANCE
   CNRS, FRANCE
   IFREMER, FRANCE
SI SETE
SE PDG-RBE-HM-RHSETE
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-univ-france
IF 4.828
TC 9
UR https://archimer.ifremer.fr/doc/00193/30447/29090.pdf
LA English
DT Article
DE ;social density;body temperature;seabird;fasting;stress;physical activity;heart rate;energy expenditure
AB 1. For seabirds that forage at sea but breed while fasting on land, successful reproduction depends on the effective management of energy stores. Additionally, breeding often means aggregating in dense colonies where social stress may affect energy budgets.  2. Male king penguins (Aptenodytes patagonicus) fast for remarkably long periods (up to 1 center dot 5months) while courting and incubating ashore. Although their fasting capacities have been well investigated in captivity, we still know very little about the energetics of freely breeding birds.  3. We monitored heart rate (HR, a proxy to energy expenditure), body temperature and physical activity of male king penguins during their courtship and first incubation shift in a colony of some 24000 freely breeding pairs. Males were breeding either under low but increasing colony density (early breeders) or at high and stable density (late breeders).  4. In early breeders, daily mean and resting HR decreased during courtship but increased again 3days before egg laying and during incubation. In late breeders, HR remained stable throughout this same breeding period. Interestingly, the daily increase in resting HR we observed in early breeders was strongly associated with a marked increase in colony density over time. This finding remained significant even after controlling for climate effects.  5. In both early and late breeders, courtship and incubation were associated with a progressive decrease in physical activity, whereas core body temperature remained unchanged.  6. We discuss the roles of decreased physical activity and thermoregulatory strategies in sustaining the long courtship-incubation fast of male king penguins. We also draw attention to a potential role of conspecific density in affecting the energetics of breeding-fasting seabirds, that is, a potential energy cost to coloniality.
PY 2014
PD JUL
SO Functional Ecology
SN 0269-8463
PU Wiley-blackwell
VL 28
IS 3
UT 000335954900009
BP 621
EP 631
DI 10.1111/1365-2435.12212
ID 30447
ER

EF