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Carry-over body mass effect from winter to breeding in a resident seabird, the little penguin ArchiMer
Salton, Marcus; Saraux, Claire; Dann, Peter; Chiaradia, André.
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...
Tipo: Text Palavras-chave: Capital-income breeding; Penguin monitoring system; Parental investment; Timing of laying; Breeding success; Seabirds.
Ano: 2015 URL: http://archimer.ifremer.fr/doc/00253/36431/34976.pdf
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Negative effects of wind speed on individual foraging performance and breeding success in little penguins ArchiMer
Saraux, Claire; Chiaradia, Andre; Salton, Marcus; Dann, Peter; Viblanc, Vincent A..
Most effects of environmental and climate variability on predator life history traits and population dynamics result from indirect effects mediated through the food chain. There is growing evidence that wind strength might affect seabirds while foraging at sea. Here, we investigated the effect of wind speed on the foraging performance of a flightless marine predator, the little penguin (Eudyptula minor). To this end, we used satellite-derived wind data collected over 11 breeding seasons during which the daily attendance and body mass changes of more than 200 penguins breeding at Phillip Island (Victoria, Australia) were recorded by an automated penguin monitoring system. Over 17 363 foraging trips, we found that wind speed had important effects on foraging...
Tipo: Text Palavras-chave: Body condition; Chick rearing; Climate change vs. climate variability; Eudyptula minor; Extreme events; Seabird.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00318/42964/42469.pdf
Registros recuperados: 2
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