Breeding success and traits of equal and unequal pairs of little penguins (Eudyptula minor) on Phillip Island during 2001-2008, supplement to: Saraux, Claire; Chiaradia, André; Le Maho, Yvon; Ropert-Coudert, Yan (2011): Everybody needs somebody: unequal parental effort in little penguins. Behavioral Ecology, 22(4), 837-845
According to life-history theory, individuals optimize their decisions in order to maximize their fitness. This raises a conflict between parents, which need to cooperate to ensure the propagation of their genes but at the same time need to minimize the associated costs. Trading-off between benefits...
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ftdatacite:10.1594/pangaea.834281 2023-05-15T16:53:58+02:00 Breeding success and traits of equal and unequal pairs of little penguins (Eudyptula minor) on Phillip Island during 2001-2008, supplement to: Saraux, Claire; Chiaradia, André; Le Maho, Yvon; Ropert-Coudert, Yan (2011): Everybody needs somebody: unequal parental effort in little penguins. Behavioral Ecology, 22(4), 837-845 Saraux, Claire Chiaradia, André Le Maho, Yvon Ropert-Coudert, Yan 2011 application/zip https://dx.doi.org/10.1594/pangaea.834281 https://doi.pangaea.de/10.1594/PANGAEA.834281 en eng PANGAEA - Data Publisher for Earth & Environmental Science https://dx.doi.org/10.1093/beheco/arr049 Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 CC-BY Observation International Polar Year 2007-2008 IPY Collection article Supplementary Collection of Datasets 2011 ftdatacite https://doi.org/10.1594/pangaea.834281 https://doi.org/10.1093/beheco/arr049 2021-11-05T12:55:41Z According to life-history theory, individuals optimize their decisions in order to maximize their fitness. This raises a conflict between parents, which need to cooperate to ensure the propagation of their genes but at the same time need to minimize the associated costs. Trading-off between benefits and costs of a reproduction is one of the major forces driving demographic trends and has shaped several different parental care strategies. Using little penguins (Eudyptula minor) as a model, we investigated whether individuals of a pair provide equal parental effort when raising offspring and whether their behavior was consistent over 8 years of contrasting resource availability. Using an automated identification system, we found that 72% of little penguin pairs exhibited unforced (i.e., that did not result from desertion of 1 parent) unequal partnership through the postguard stage. This proportion was lower in favorable years. Although being an equal pair appeared to be a better strategy, it was nonetheless the least often observed. Individuals that contributed less than their partner were not less experienced (measured by age), and gender did not explain differences between partners. Furthermore, birds that contributed little or that contributed a lot tended to be consistent in their level of contribution across years. We suggest that unequal effort during breeding may reflect differences in individual quality, and we encourage future studies on parental care to consider this consistent low and high contributor behavior when investigating differences in pair investment into its offspring. Key words: attendance patterns, individual quality, meal size, parental care, reproductive costs, seabirds. : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 Article in Journal/Newspaper International Polar Year IPY DataCite Metadata Store (German National Library of Science and Technology) Yvon ENVELOPE(70.283,70.283,-49.350,-49.350) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
topic |
Observation International Polar Year 2007-2008 IPY |
spellingShingle |
Observation International Polar Year 2007-2008 IPY Saraux, Claire Chiaradia, André Le Maho, Yvon Ropert-Coudert, Yan Breeding success and traits of equal and unequal pairs of little penguins (Eudyptula minor) on Phillip Island during 2001-2008, supplement to: Saraux, Claire; Chiaradia, André; Le Maho, Yvon; Ropert-Coudert, Yan (2011): Everybody needs somebody: unequal parental effort in little penguins. Behavioral Ecology, 22(4), 837-845 |
topic_facet |
Observation International Polar Year 2007-2008 IPY |
description |
According to life-history theory, individuals optimize their decisions in order to maximize their fitness. This raises a conflict between parents, which need to cooperate to ensure the propagation of their genes but at the same time need to minimize the associated costs. Trading-off between benefits and costs of a reproduction is one of the major forces driving demographic trends and has shaped several different parental care strategies. Using little penguins (Eudyptula minor) as a model, we investigated whether individuals of a pair provide equal parental effort when raising offspring and whether their behavior was consistent over 8 years of contrasting resource availability. Using an automated identification system, we found that 72% of little penguin pairs exhibited unforced (i.e., that did not result from desertion of 1 parent) unequal partnership through the postguard stage. This proportion was lower in favorable years. Although being an equal pair appeared to be a better strategy, it was nonetheless the least often observed. Individuals that contributed less than their partner were not less experienced (measured by age), and gender did not explain differences between partners. Furthermore, birds that contributed little or that contributed a lot tended to be consistent in their level of contribution across years. We suggest that unequal effort during breeding may reflect differences in individual quality, and we encourage future studies on parental care to consider this consistent low and high contributor behavior when investigating differences in pair investment into its offspring. Key words: attendance patterns, individual quality, meal size, parental care, reproductive costs, seabirds. : Data extracted in the frame of a joint ICSTI/PANGAEA IPY effort, see http://doi.pangaea.de/10.1594/PANGAEA.150150 |
format |
Article in Journal/Newspaper |
author |
Saraux, Claire Chiaradia, André Le Maho, Yvon Ropert-Coudert, Yan |
author_facet |
Saraux, Claire Chiaradia, André Le Maho, Yvon Ropert-Coudert, Yan |
author_sort |
Saraux, Claire |
title |
Breeding success and traits of equal and unequal pairs of little penguins (Eudyptula minor) on Phillip Island during 2001-2008, supplement to: Saraux, Claire; Chiaradia, André; Le Maho, Yvon; Ropert-Coudert, Yan (2011): Everybody needs somebody: unequal parental effort in little penguins. Behavioral Ecology, 22(4), 837-845 |
title_short |
Breeding success and traits of equal and unequal pairs of little penguins (Eudyptula minor) on Phillip Island during 2001-2008, supplement to: Saraux, Claire; Chiaradia, André; Le Maho, Yvon; Ropert-Coudert, Yan (2011): Everybody needs somebody: unequal parental effort in little penguins. Behavioral Ecology, 22(4), 837-845 |
title_full |
Breeding success and traits of equal and unequal pairs of little penguins (Eudyptula minor) on Phillip Island during 2001-2008, supplement to: Saraux, Claire; Chiaradia, André; Le Maho, Yvon; Ropert-Coudert, Yan (2011): Everybody needs somebody: unequal parental effort in little penguins. Behavioral Ecology, 22(4), 837-845 |
title_fullStr |
Breeding success and traits of equal and unequal pairs of little penguins (Eudyptula minor) on Phillip Island during 2001-2008, supplement to: Saraux, Claire; Chiaradia, André; Le Maho, Yvon; Ropert-Coudert, Yan (2011): Everybody needs somebody: unequal parental effort in little penguins. Behavioral Ecology, 22(4), 837-845 |
title_full_unstemmed |
Breeding success and traits of equal and unequal pairs of little penguins (Eudyptula minor) on Phillip Island during 2001-2008, supplement to: Saraux, Claire; Chiaradia, André; Le Maho, Yvon; Ropert-Coudert, Yan (2011): Everybody needs somebody: unequal parental effort in little penguins. Behavioral Ecology, 22(4), 837-845 |
title_sort |
breeding success and traits of equal and unequal pairs of little penguins (eudyptula minor) on phillip island during 2001-2008, supplement to: saraux, claire; chiaradia, andré; le maho, yvon; ropert-coudert, yan (2011): everybody needs somebody: unequal parental effort in little penguins. behavioral ecology, 22(4), 837-845 |
publisher |
PANGAEA - Data Publisher for Earth & Environmental Science |
publishDate |
2011 |
url |
https://dx.doi.org/10.1594/pangaea.834281 https://doi.pangaea.de/10.1594/PANGAEA.834281 |
long_lat |
ENVELOPE(70.283,70.283,-49.350,-49.350) |
geographic |
Yvon |
geographic_facet |
Yvon |
genre |
International Polar Year IPY |
genre_facet |
International Polar Year IPY |
op_relation |
https://dx.doi.org/10.1093/beheco/arr049 |
op_rights |
Creative Commons Attribution 3.0 Unported https://creativecommons.org/licenses/by/3.0/legalcode cc-by-3.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1594/pangaea.834281 https://doi.org/10.1093/beheco/arr049 |
_version_ |
1766044565552234496 |