Faster growth and larger size at crèche onset are associated with higher offspring survival in Adélie Penguins
Abstract We conducted the first assessment of Adélie Penguin (Pygoscelis adeliae) chick survival that accounts for imperfect resighting. We found that when chicks are larger in size when they enter the crèche stage (the period when both parents forage at the same time and chicks are left relatively...
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Oxford University Press (OUP)
2023
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Online Access: | http://dx.doi.org/10.1093/ornithology/ukad006 https://academic.oup.com/auk/advance-article-pdf/doi/10.1093/ornithology/ukad006/49688436/ukad006.pdf https://academic.oup.com/auk/article-pdf/140/2/ukad006/50247223/ukad006.pdf |
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croxfordunivpr:10.1093/ornithology/ukad006 2024-06-09T07:49:11+00:00 Faster growth and larger size at crèche onset are associated with higher offspring survival in Adélie Penguins Jennings, Scott Dugger, Katie M Ballard, Grant Ainley, David G National Science Foundation 2023 http://dx.doi.org/10.1093/ornithology/ukad006 https://academic.oup.com/auk/advance-article-pdf/doi/10.1093/ornithology/ukad006/49688436/ukad006.pdf https://academic.oup.com/auk/article-pdf/140/2/ukad006/50247223/ukad006.pdf en eng Oxford University Press (OUP) https://academic.oup.com/pages/standard-publication-reuse-rights Ornithology volume 140, issue 2 ISSN 0004-8038 2732-4613 journal-article 2023 croxfordunivpr https://doi.org/10.1093/ornithology/ukad006 2024-05-10T13:15:01Z Abstract We conducted the first assessment of Adélie Penguin (Pygoscelis adeliae) chick survival that accounts for imperfect resighting. We found that when chicks are larger in size when they enter the crèche stage (the period when both parents forage at the same time and chicks are left relatively unprotected), they have a higher probability of survival to fledging. We investigated the relationships between growth, crèche timing, and chick survival during one typical year and one year of reduced food availability. Chicks that hatched earlier in the season entered the crèche stage older, and chicks that both grew faster and crèched older entered the crèche at a larger size. These relationships were stronger in the year of reduced food availability. Thus, parents increased their chicks’ chance of fledging if they provided sufficient food for faster growth rates and/or extended the length of the brood-guarding period. Early nest initiation (i.e., early hatching) provided parents with the opportunity to extend the guard period and increase chick survival. However, to extend the guard stage successfully, they must provide larger meals and maintain higher chick growth rates, even if just one parent at a time is foraging, which previous work has shown is not possible for all individuals. We show that the factors governing tradeoffs in chick-rearing behavior of Adélie Penguin parents may vary in accord with environmental conditions, a result from which we can better understand species’ adaptations to environmental changes. Article in Journal/Newspaper Pygoscelis adeliae Oxford University Press Ornithology |
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Oxford University Press |
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English |
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Abstract We conducted the first assessment of Adélie Penguin (Pygoscelis adeliae) chick survival that accounts for imperfect resighting. We found that when chicks are larger in size when they enter the crèche stage (the period when both parents forage at the same time and chicks are left relatively unprotected), they have a higher probability of survival to fledging. We investigated the relationships between growth, crèche timing, and chick survival during one typical year and one year of reduced food availability. Chicks that hatched earlier in the season entered the crèche stage older, and chicks that both grew faster and crèched older entered the crèche at a larger size. These relationships were stronger in the year of reduced food availability. Thus, parents increased their chicks’ chance of fledging if they provided sufficient food for faster growth rates and/or extended the length of the brood-guarding period. Early nest initiation (i.e., early hatching) provided parents with the opportunity to extend the guard period and increase chick survival. However, to extend the guard stage successfully, they must provide larger meals and maintain higher chick growth rates, even if just one parent at a time is foraging, which previous work has shown is not possible for all individuals. We show that the factors governing tradeoffs in chick-rearing behavior of Adélie Penguin parents may vary in accord with environmental conditions, a result from which we can better understand species’ adaptations to environmental changes. |
author2 |
National Science Foundation |
format |
Article in Journal/Newspaper |
author |
Jennings, Scott Dugger, Katie M Ballard, Grant Ainley, David G |
spellingShingle |
Jennings, Scott Dugger, Katie M Ballard, Grant Ainley, David G Faster growth and larger size at crèche onset are associated with higher offspring survival in Adélie Penguins |
author_facet |
Jennings, Scott Dugger, Katie M Ballard, Grant Ainley, David G |
author_sort |
Jennings, Scott |
title |
Faster growth and larger size at crèche onset are associated with higher offspring survival in Adélie Penguins |
title_short |
Faster growth and larger size at crèche onset are associated with higher offspring survival in Adélie Penguins |
title_full |
Faster growth and larger size at crèche onset are associated with higher offspring survival in Adélie Penguins |
title_fullStr |
Faster growth and larger size at crèche onset are associated with higher offspring survival in Adélie Penguins |
title_full_unstemmed |
Faster growth and larger size at crèche onset are associated with higher offspring survival in Adélie Penguins |
title_sort |
faster growth and larger size at crèche onset are associated with higher offspring survival in adélie penguins |
publisher |
Oxford University Press (OUP) |
publishDate |
2023 |
url |
http://dx.doi.org/10.1093/ornithology/ukad006 https://academic.oup.com/auk/advance-article-pdf/doi/10.1093/ornithology/ukad006/49688436/ukad006.pdf https://academic.oup.com/auk/article-pdf/140/2/ukad006/50247223/ukad006.pdf |
genre |
Pygoscelis adeliae |
genre_facet |
Pygoscelis adeliae |
op_source |
Ornithology volume 140, issue 2 ISSN 0004-8038 2732-4613 |
op_rights |
https://academic.oup.com/pages/standard-publication-reuse-rights |
op_doi |
https://doi.org/10.1093/ornithology/ukad006 |
container_title |
Ornithology |
_version_ |
1801381474976399360 |