Simultaneous DNA-based diet analysis of breeding, non-breeding and chick Adélie penguins
As central place foragers, breeding penguins are restricted in foraging range by the need to return to the colony to feed chicks. Furthermore, breeding birds must balance energetic gain from self-feeding with the costs of returning to provision young. Non-breeding birds, however, are likely to be le...
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crroyalsociety:10.1098/rsos.150443 2024-06-23T07:45:45+00:00 Simultaneous DNA-based diet analysis of breeding, non-breeding and chick Adélie penguins McInnes, Julie C. Emmerson, Louise Southwell, Colin Faux, Cassandra Jarman, Simon N. Australian Antarctic Division 2016 http://dx.doi.org/10.1098/rsos.150443 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.150443 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.150443 en eng The Royal Society https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ Royal Society Open Science volume 3, issue 1, page 150443 ISSN 2054-5703 journal-article 2016 crroyalsociety https://doi.org/10.1098/rsos.150443 2024-06-04T06:23:00Z As central place foragers, breeding penguins are restricted in foraging range by the need to return to the colony to feed chicks. Furthermore, breeding birds must balance energetic gain from self-feeding with the costs of returning to provision young. Non-breeding birds, however, are likely to be less restricted in foraging range and lack the high energy demands of provisioning, therefore may consume different prey to breeders. We used DNA dietary analysis to determine whether there was a difference in provisioning and self-feeding diet by identifying prey DNA in scat samples from breeding and chick Adélie penguins at two locations in East Antarctica. We also investigated diet differences between breeders and non-breeders at one site. Although previous work shows changing foraging behaviour between chick provisioning and self-feeding, our results suggest no significant differences in the main prey groups consumed by chicks and breeders at either site or between breeding stages. This may reflect the inability of penguins to selectively forage when provisioning, or resources were sufficient for all foraging needs. Conversely, non-breeders were found to consume different prey groups to breeders, which may reflect less restricted foraging ranges, breeders actively selecting particular prey during breeding or reduced foraging experience of non-breeders. Article in Journal/Newspaper Antarc* Antarctica East Antarctica The Royal Society East Antarctica Royal Society Open Science 3 1 150443 |
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Open Polar |
collection |
The Royal Society |
op_collection_id |
crroyalsociety |
language |
English |
description |
As central place foragers, breeding penguins are restricted in foraging range by the need to return to the colony to feed chicks. Furthermore, breeding birds must balance energetic gain from self-feeding with the costs of returning to provision young. Non-breeding birds, however, are likely to be less restricted in foraging range and lack the high energy demands of provisioning, therefore may consume different prey to breeders. We used DNA dietary analysis to determine whether there was a difference in provisioning and self-feeding diet by identifying prey DNA in scat samples from breeding and chick Adélie penguins at two locations in East Antarctica. We also investigated diet differences between breeders and non-breeders at one site. Although previous work shows changing foraging behaviour between chick provisioning and self-feeding, our results suggest no significant differences in the main prey groups consumed by chicks and breeders at either site or between breeding stages. This may reflect the inability of penguins to selectively forage when provisioning, or resources were sufficient for all foraging needs. Conversely, non-breeders were found to consume different prey groups to breeders, which may reflect less restricted foraging ranges, breeders actively selecting particular prey during breeding or reduced foraging experience of non-breeders. |
author2 |
Australian Antarctic Division |
format |
Article in Journal/Newspaper |
author |
McInnes, Julie C. Emmerson, Louise Southwell, Colin Faux, Cassandra Jarman, Simon N. |
spellingShingle |
McInnes, Julie C. Emmerson, Louise Southwell, Colin Faux, Cassandra Jarman, Simon N. Simultaneous DNA-based diet analysis of breeding, non-breeding and chick Adélie penguins |
author_facet |
McInnes, Julie C. Emmerson, Louise Southwell, Colin Faux, Cassandra Jarman, Simon N. |
author_sort |
McInnes, Julie C. |
title |
Simultaneous DNA-based diet analysis of breeding, non-breeding and chick Adélie penguins |
title_short |
Simultaneous DNA-based diet analysis of breeding, non-breeding and chick Adélie penguins |
title_full |
Simultaneous DNA-based diet analysis of breeding, non-breeding and chick Adélie penguins |
title_fullStr |
Simultaneous DNA-based diet analysis of breeding, non-breeding and chick Adélie penguins |
title_full_unstemmed |
Simultaneous DNA-based diet analysis of breeding, non-breeding and chick Adélie penguins |
title_sort |
simultaneous dna-based diet analysis of breeding, non-breeding and chick adélie penguins |
publisher |
The Royal Society |
publishDate |
2016 |
url |
http://dx.doi.org/10.1098/rsos.150443 https://royalsocietypublishing.org/doi/pdf/10.1098/rsos.150443 https://royalsocietypublishing.org/doi/full-xml/10.1098/rsos.150443 |
geographic |
East Antarctica |
geographic_facet |
East Antarctica |
genre |
Antarc* Antarctica East Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica |
op_source |
Royal Society Open Science volume 3, issue 1, page 150443 ISSN 2054-5703 |
op_rights |
https://royalsociety.org/journals/ethics-policies/data-sharing-mining/ |
op_doi |
https://doi.org/10.1098/rsos.150443 |
container_title |
Royal Society Open Science |
container_volume |
3 |
container_issue |
1 |
container_start_page |
150443 |
_version_ |
1802642229428224000 |