Parents are a Drag: Long-Lived Birds Share the Cost of Increased Foraging Effort with Their Offspring, but Males Pass on More of the Costs than Females
Life history theory predicts that parents will balance benefits from investment in current offspring against benefits from future reproductive investments. Long-lived organisms are therefore less likely to increase parental effort when environmental conditions deteriorate. To investigate the effect...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3559872 http://www.ncbi.nlm.nih.gov/pubmed/23382921 https://doi.org/10.1371/journal.pone.0054594 |
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ftpubmed:oai:pubmedcentral.nih.gov:3559872 2023-05-15T18:41:33+02:00 Parents are a Drag: Long-Lived Birds Share the Cost of Increased Foraging Effort with Their Offspring, but Males Pass on More of the Costs than Females Jacobs, Shoshanah R. Elliott, Kyle Hamish Gaston, Anthony J. 2013-01-30 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3559872 http://www.ncbi.nlm.nih.gov/pubmed/23382921 https://doi.org/10.1371/journal.pone.0054594 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3559872 http://www.ncbi.nlm.nih.gov/pubmed/23382921 http://dx.doi.org/10.1371/journal.pone.0054594 This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CC-BY Research Article Text 2013 ftpubmed https://doi.org/10.1371/journal.pone.0054594 2013-09-04T19:12:27Z Life history theory predicts that parents will balance benefits from investment in current offspring against benefits from future reproductive investments. Long-lived organisms are therefore less likely to increase parental effort when environmental conditions deteriorate. To investigate the effect of decreased foraging capacity on parental behaviour of long-lived monogamous seabirds, we experimentally increased energy costs for chick-rearing thick-billed murres (Uria lomvia). Handicapped birds had lighter chicks and lower provisioning rates, supporting the prediction that long-lived animals would pass some of the costs of impaired foraging ability on to their offspring. Nonetheless, handicapped birds spent less time underwater, had longer inter-dive surface intervals, had lower body mass, showed lower resighting probabilities in subsequent years and consumed fewer risky prey items. Corticosterone levels were similar between control and handicapped birds. Apparently, adults shared some of the costs of impaired foraging, but those costs were not measurable in all metrics. Handicapped males had higher plasma neutral lipid concentrations (higher energy mobilisation) and their chicks exhibited lower growth rates than handicapped females, suggesting different sex-specific investment strategies. Unlike other studies of auks, partners did not compensate for handicapping, despite good foraging conditions for unhandicapped birds. In conclusion, parental murres and their offspring shared the costs of experimentally increased foraging constraints, with females investing more than males. Text Uria lomvia uria PubMed Central (PMC) PLoS ONE 8 1 e54594 |
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Research Article Jacobs, Shoshanah R. Elliott, Kyle Hamish Gaston, Anthony J. Parents are a Drag: Long-Lived Birds Share the Cost of Increased Foraging Effort with Their Offspring, but Males Pass on More of the Costs than Females |
topic_facet |
Research Article |
description |
Life history theory predicts that parents will balance benefits from investment in current offspring against benefits from future reproductive investments. Long-lived organisms are therefore less likely to increase parental effort when environmental conditions deteriorate. To investigate the effect of decreased foraging capacity on parental behaviour of long-lived monogamous seabirds, we experimentally increased energy costs for chick-rearing thick-billed murres (Uria lomvia). Handicapped birds had lighter chicks and lower provisioning rates, supporting the prediction that long-lived animals would pass some of the costs of impaired foraging ability on to their offspring. Nonetheless, handicapped birds spent less time underwater, had longer inter-dive surface intervals, had lower body mass, showed lower resighting probabilities in subsequent years and consumed fewer risky prey items. Corticosterone levels were similar between control and handicapped birds. Apparently, adults shared some of the costs of impaired foraging, but those costs were not measurable in all metrics. Handicapped males had higher plasma neutral lipid concentrations (higher energy mobilisation) and their chicks exhibited lower growth rates than handicapped females, suggesting different sex-specific investment strategies. Unlike other studies of auks, partners did not compensate for handicapping, despite good foraging conditions for unhandicapped birds. In conclusion, parental murres and their offspring shared the costs of experimentally increased foraging constraints, with females investing more than males. |
format |
Text |
author |
Jacobs, Shoshanah R. Elliott, Kyle Hamish Gaston, Anthony J. |
author_facet |
Jacobs, Shoshanah R. Elliott, Kyle Hamish Gaston, Anthony J. |
author_sort |
Jacobs, Shoshanah R. |
title |
Parents are a Drag: Long-Lived Birds Share the Cost of Increased Foraging Effort with Their Offspring, but Males Pass on More of the Costs than Females |
title_short |
Parents are a Drag: Long-Lived Birds Share the Cost of Increased Foraging Effort with Their Offspring, but Males Pass on More of the Costs than Females |
title_full |
Parents are a Drag: Long-Lived Birds Share the Cost of Increased Foraging Effort with Their Offspring, but Males Pass on More of the Costs than Females |
title_fullStr |
Parents are a Drag: Long-Lived Birds Share the Cost of Increased Foraging Effort with Their Offspring, but Males Pass on More of the Costs than Females |
title_full_unstemmed |
Parents are a Drag: Long-Lived Birds Share the Cost of Increased Foraging Effort with Their Offspring, but Males Pass on More of the Costs than Females |
title_sort |
parents are a drag: long-lived birds share the cost of increased foraging effort with their offspring, but males pass on more of the costs than females |
publisher |
Public Library of Science |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3559872 http://www.ncbi.nlm.nih.gov/pubmed/23382921 https://doi.org/10.1371/journal.pone.0054594 |
genre |
Uria lomvia uria |
genre_facet |
Uria lomvia uria |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3559872 http://www.ncbi.nlm.nih.gov/pubmed/23382921 http://dx.doi.org/10.1371/journal.pone.0054594 |
op_rights |
This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0054594 |
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PLoS ONE |
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8 |
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1 |
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e54594 |
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