Does foraging performance change with age in female little penguins (Eudyptula minor)?

Age-related changes in breeding performance are likely to be mediated through changes in parental foraging performance. We investigated the relationship of foraging performance with age in female little penguins at Phillip Island, Australia, during the guard phase of the 2005 breeding season. Foragi...

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Autores principales:	Ilka Zimmer, Yan Ropert-Coudert, Akiko Kato, Andre Ancel, Andre Chiaradia
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2011
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/01a17f0e2294463da3aeb6a1d2f77a36
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spelling	oai:doaj.org-article:01a17f0e2294463da3aeb6a1d2f77a362021-11-18T06:59:56ZDoes foraging performance change with age in female little penguins (Eudyptula minor)?1932-620310.1371/journal.pone.0016098https://doaj.org/article/01a17f0e2294463da3aeb6a1d2f77a362011-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/21283573/pdf/?tool=EBIhttps://doaj.org/toc/1932-6203Age-related changes in breeding performance are likely to be mediated through changes in parental foraging performance. We investigated the relationship of foraging performance with age in female little penguins at Phillip Island, Australia, during the guard phase of the 2005 breeding season. Foraging parameters were recorded with accelerometers for birds grouped into three age-classes: (1) young, (2) middle age and (3) old females. We found the diving behaviour of middle-aged birds differed from young and old birds. The dive duration of middle age females was shorter than that of young and old birds while their dive effort (measure for dive and post-dive duration relation) was lower than that of young ones, suggesting middle-aged birds were in better physical condition than other ones. There was no difference in prey pursuit frequency or duration between age classes, but in the hunting tactic. Females pursued more prey around and after reaching the maximum depth of dives the more experienced they were (old > middle age > young), an energy saving hunting tactic by probably taking advantage of up-thrust momentum. We suggest middle age penguins forage better than young or old ones because good physical condition and foraging experience could act simultaneously.Ilka ZimmerYan Ropert-CoudertAkiko KatoAndre AncelAndre ChiaradiaPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 6, Iss 1, p e16098 (2011)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Ilka Zimmer Yan Ropert-Coudert Akiko Kato Andre Ancel Andre Chiaradia Does foraging performance change with age in female little penguins (Eudyptula minor)?
description	Age-related changes in breeding performance are likely to be mediated through changes in parental foraging performance. We investigated the relationship of foraging performance with age in female little penguins at Phillip Island, Australia, during the guard phase of the 2005 breeding season. Foraging parameters were recorded with accelerometers for birds grouped into three age-classes: (1) young, (2) middle age and (3) old females. We found the diving behaviour of middle-aged birds differed from young and old birds. The dive duration of middle age females was shorter than that of young and old birds while their dive effort (measure for dive and post-dive duration relation) was lower than that of young ones, suggesting middle-aged birds were in better physical condition than other ones. There was no difference in prey pursuit frequency or duration between age classes, but in the hunting tactic. Females pursued more prey around and after reaching the maximum depth of dives the more experienced they were (old > middle age > young), an energy saving hunting tactic by probably taking advantage of up-thrust momentum. We suggest middle age penguins forage better than young or old ones because good physical condition and foraging experience could act simultaneously.
format	article
author	Ilka Zimmer Yan Ropert-Coudert Akiko Kato Andre Ancel Andre Chiaradia
author_facet	Ilka Zimmer Yan Ropert-Coudert Akiko Kato Andre Ancel Andre Chiaradia
author_sort	Ilka Zimmer
title	Does foraging performance change with age in female little penguins (Eudyptula minor)?
title_short	Does foraging performance change with age in female little penguins (Eudyptula minor)?
title_full	Does foraging performance change with age in female little penguins (Eudyptula minor)?
title_fullStr	Does foraging performance change with age in female little penguins (Eudyptula minor)?
title_full_unstemmed	Does foraging performance change with age in female little penguins (Eudyptula minor)?
title_sort	does foraging performance change with age in female little penguins (eudyptula minor)?
publisher	Public Library of Science (PLoS)
publishDate	2011
url	https://doaj.org/article/01a17f0e2294463da3aeb6a1d2f77a36
work_keys_str_mv	AT ilkazimmer doesforagingperformancechangewithageinfemalelittlepenguinseudyptulaminor AT yanropertcoudert doesforagingperformancechangewithageinfemalelittlepenguinseudyptulaminor AT akikokato doesforagingperformancechangewithageinfemalelittlepenguinseudyptulaminor AT andreancel doesforagingperformancechangewithageinfemalelittlepenguinseudyptulaminor AT andrechiaradia doesforagingperformancechangewithageinfemalelittlepenguinseudyptulaminor
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Does foraging performance change with age in female little penguins (Eudyptula minor)?

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