FN Archimer Export Format PT J TI Carry-over body mass effect from winter to breeding in a resident seabird, the little penguin BT AF SALTON, Marcus SARAUX, Claire DANN, Peter CHIARADIA, Andre AS 1:1;2:2,3;3:1;4:1; FF 1:;2:PDG-RBE-MARBEC-LHM;3:;4:; C1 Phillip Isl Nat Pk, Res Dept, POB 97, Cowes, Vic 3922, Australia. CNRS, Inst Pluridisciplinaire Hubert Curien, UMR7178, F-67087 Strasbourg, France. IFREMER, UMR Exploited Marine Ecosyst 212, F-34203 Sete, France. C2 PHILLIP ISL NAT PK, AUSTRALIA CNRS, FRANCE IFREMER, FRANCE SI SETE SE PDG-RBE-MARBEC-LHM UM MARBEC IN WOS Ifremer jusqu'en 2018 copubli-france copubli-int-hors-europe IF 2.243 TC 38 UR https://archimer.ifremer.fr/doc/00253/36431/34976.pdf LA English DT Article DE ;capital-income breeding;penguin monitoring system;parental investment;timing of laying;breeding success;seabirds AB Using body mass and breeding data of individual penguins collected continuously over 7 years (2002–2008), we examined carry-over effects of winter body mass on timing of laying and breeding success in a resident seabird, the little penguin (Eudyptula minor). The austral winter month of July consistently had the lowest rate of colony attendance, which confirmed our expectation that penguins work hard to find resources at this time between breeding seasons. Contrary to our expectation, body mass in winter (July) was equal or higher than in the period before (‘moult-recovery’) and after (‘pre-breeding’) in 5 of 7 years for males and in all 7 years for females. We provided evidence of a carry-over effect of body mass from winter to breeding; females and males with higher body mass in winter were more likely to breed early and males with higher body mass in winter were likely to breed successfully. Sex differences might relate to sex-specific breeding tasks, where females may use their winter reserves to invest in egg-laying, whereas males use their winter reserves to sustain the longer fasts ashore during courtship. Our findings suggest that resident seabirds like little penguins can also benefit from a carry-over effect of winter body mass on subsequent breeding. PY 2015 PD JAN SO Royal Society Open Science SN 2054-5703 PU Royal Soc VL 2 IS 1 UT 000377964600013 DI 10.1098/rsos.140390 ID 36431 ER EF