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Early-life begging effort reduces adult body mass but strengthens behavioural defence of the rate of energy intake in European starlings
Animals require strategies for coping with periods when food is scarce. Such strategies include storing fat as a buffer, and defending the rate of energy intake by changing foraging behaviour when food becomes difficult to obtain. Storage and behavioural defence may constitute alternative strategies...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society Publishing
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5990846/ https://www.ncbi.nlm.nih.gov/pubmed/29892383 http://dx.doi.org/10.1098/rsos.171918 |
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author | Dunn, Jonathon Andrews, Clare Nettle, Daniel Bateson, Melissa |
author_facet | Dunn, Jonathon Andrews, Clare Nettle, Daniel Bateson, Melissa |
author_sort | Dunn, Jonathon |
collection | PubMed |
description | Animals require strategies for coping with periods when food is scarce. Such strategies include storing fat as a buffer, and defending the rate of energy intake by changing foraging behaviour when food becomes difficult to obtain. Storage and behavioural defence may constitute alternative strategies for solving the same problem. We would thus expect any developmental influences that limit fat storage in adulthood to also induce a compensatory alteration in adult foraging behaviour, specifically when food is hard to obtain. In a cohort of hand-reared European starlings, we found that higher manipulated early-life begging effort caused individuals to maintain consistently lower adult body mass over a period of two years. Using an operant foraging task in which we systematically varied the costs of obtaining food, we show that higher early-life begging effort also caused stronger behavioural defence of the rate of energy intake when food was more costly to obtain. Among individuals with the same developmental history, however, those individuals who defended their rate of energy intake most strongly were also the heaviest. Our results are relevant to understanding why there are marked differences in body weight and foraging behaviour even among individuals inhabiting the same environment. |
format | Online Article Text |
id | pubmed-5990846 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | The Royal Society Publishing |
record_format | MEDLINE/PubMed |
spelling | pubmed-59908462018-06-11 Early-life begging effort reduces adult body mass but strengthens behavioural defence of the rate of energy intake in European starlings Dunn, Jonathon Andrews, Clare Nettle, Daniel Bateson, Melissa R Soc Open Sci Biology (Whole Organism) Animals require strategies for coping with periods when food is scarce. Such strategies include storing fat as a buffer, and defending the rate of energy intake by changing foraging behaviour when food becomes difficult to obtain. Storage and behavioural defence may constitute alternative strategies for solving the same problem. We would thus expect any developmental influences that limit fat storage in adulthood to also induce a compensatory alteration in adult foraging behaviour, specifically when food is hard to obtain. In a cohort of hand-reared European starlings, we found that higher manipulated early-life begging effort caused individuals to maintain consistently lower adult body mass over a period of two years. Using an operant foraging task in which we systematically varied the costs of obtaining food, we show that higher early-life begging effort also caused stronger behavioural defence of the rate of energy intake when food was more costly to obtain. Among individuals with the same developmental history, however, those individuals who defended their rate of energy intake most strongly were also the heaviest. Our results are relevant to understanding why there are marked differences in body weight and foraging behaviour even among individuals inhabiting the same environment. The Royal Society Publishing 2018-05-09 /pmc/articles/PMC5990846/ /pubmed/29892383 http://dx.doi.org/10.1098/rsos.171918 Text en © 2018 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Biology (Whole Organism) Dunn, Jonathon Andrews, Clare Nettle, Daniel Bateson, Melissa Early-life begging effort reduces adult body mass but strengthens behavioural defence of the rate of energy intake in European starlings |
title | Early-life begging effort reduces adult body mass but strengthens behavioural defence of the rate of energy intake in European starlings |
title_full | Early-life begging effort reduces adult body mass but strengthens behavioural defence of the rate of energy intake in European starlings |
title_fullStr | Early-life begging effort reduces adult body mass but strengthens behavioural defence of the rate of energy intake in European starlings |
title_full_unstemmed | Early-life begging effort reduces adult body mass but strengthens behavioural defence of the rate of energy intake in European starlings |
title_short | Early-life begging effort reduces adult body mass but strengthens behavioural defence of the rate of energy intake in European starlings |
title_sort | early-life begging effort reduces adult body mass but strengthens behavioural defence of the rate of energy intake in european starlings |
topic | Biology (Whole Organism) |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5990846/ https://www.ncbi.nlm.nih.gov/pubmed/29892383 http://dx.doi.org/10.1098/rsos.171918 |
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