Environmental Quality Predicts Optimal Egg Size in the Wild
Parents can maximize their reproductive success by balancing the trade-off between investment per offspring and fecundity. According to theory, environmental quality influences the relationship between investment per offspring and offspring fitness, such that well-provisioned offspring fare better w...
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ftoslouniv:oai:www.duo.uio.no:10852/57089 2023-05-15T15:32:33+02:00 Environmental Quality Predicts Optimal Egg Size in the Wild Rollinson, Njal Hutchings, Jeffrey 2013-08-22T12:52:23Z http://hdl.handle.net/10852/57089 http://urn.nb.no/URN:NBN:no-59808 https://doi.org/10.1086/670648 EN eng University of Chicago Press http://urn.nb.no/URN:NBN:no-59808 Rollinson, Njal Hutchings, Jeffrey . Environmental Quality Predicts Optimal Egg Size in the Wild. American Naturalist. 2013, 182(1), 76-90 http://hdl.handle.net/10852/57089 1044620 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=American Naturalist&rft.volume=182&rft.spage=76&rft.date=2013 American Naturalist 182 1 76 90 http://dx.doi.org/10.1086/670648 URN:NBN:no-59808 Fulltext https://www.duo.uio.no/bitstream/handle/10852/57089/2/670648.pdf 0003-0147 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2013 ftoslouniv https://doi.org/10.1086/670648 2020-06-21T08:50:59Z Parents can maximize their reproductive success by balancing the trade-off between investment per offspring and fecundity. According to theory, environmental quality influences the relationship between investment per offspring and offspring fitness, such that well-provisioned offspring fare better when environmental quality is lower. A major prediction of classic theory, then, is that optimal investment per offspring will increase as environmental quality decreases. To test this prediction, we release over 30,000 juvenile Atlantic salmon (Salmo salar) into eight wild stream environments, and we monitor subsequent growth and survival of juveniles. We estimate the shape of the relationship between investment per offspring (egg size) and offspring fitness in each stream. We find that optimal egg size is greater when the quality of the stream environment is lower (as estimated by a composite index of habitat quality). Across streams, the mean size of stream gravel and the mean amount of incident sunlight are the most important individual predictors of optimal egg size. Within streams, juveniles recaptured in stream subsections that featured larger gravels and greater levels of sunlight also grew relatively quickly, an association that complements our cross-stream analyses. This study provides the first empirical verification that environmental quality alters the relationship between investment per offspring and offspring fitness, such that optimal investment per offspring increases as environmental quality decreases. © 2013 University of Chicago Press Article in Journal/Newspaper Atlantic salmon Salmo salar Universitet i Oslo: Digitale utgivelser ved UiO (DUO) The American Naturalist 182 1 76 90 |
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Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
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ftoslouniv |
language |
English |
description |
Parents can maximize their reproductive success by balancing the trade-off between investment per offspring and fecundity. According to theory, environmental quality influences the relationship between investment per offspring and offspring fitness, such that well-provisioned offspring fare better when environmental quality is lower. A major prediction of classic theory, then, is that optimal investment per offspring will increase as environmental quality decreases. To test this prediction, we release over 30,000 juvenile Atlantic salmon (Salmo salar) into eight wild stream environments, and we monitor subsequent growth and survival of juveniles. We estimate the shape of the relationship between investment per offspring (egg size) and offspring fitness in each stream. We find that optimal egg size is greater when the quality of the stream environment is lower (as estimated by a composite index of habitat quality). Across streams, the mean size of stream gravel and the mean amount of incident sunlight are the most important individual predictors of optimal egg size. Within streams, juveniles recaptured in stream subsections that featured larger gravels and greater levels of sunlight also grew relatively quickly, an association that complements our cross-stream analyses. This study provides the first empirical verification that environmental quality alters the relationship between investment per offspring and offspring fitness, such that optimal investment per offspring increases as environmental quality decreases. © 2013 University of Chicago Press |
format |
Article in Journal/Newspaper |
author |
Rollinson, Njal Hutchings, Jeffrey |
spellingShingle |
Rollinson, Njal Hutchings, Jeffrey Environmental Quality Predicts Optimal Egg Size in the Wild |
author_facet |
Rollinson, Njal Hutchings, Jeffrey |
author_sort |
Rollinson, Njal |
title |
Environmental Quality Predicts Optimal Egg Size in the Wild |
title_short |
Environmental Quality Predicts Optimal Egg Size in the Wild |
title_full |
Environmental Quality Predicts Optimal Egg Size in the Wild |
title_fullStr |
Environmental Quality Predicts Optimal Egg Size in the Wild |
title_full_unstemmed |
Environmental Quality Predicts Optimal Egg Size in the Wild |
title_sort |
environmental quality predicts optimal egg size in the wild |
publisher |
University of Chicago Press |
publishDate |
2013 |
url |
http://hdl.handle.net/10852/57089 http://urn.nb.no/URN:NBN:no-59808 https://doi.org/10.1086/670648 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
0003-0147 |
op_relation |
http://urn.nb.no/URN:NBN:no-59808 Rollinson, Njal Hutchings, Jeffrey . Environmental Quality Predicts Optimal Egg Size in the Wild. American Naturalist. 2013, 182(1), 76-90 http://hdl.handle.net/10852/57089 1044620 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=American Naturalist&rft.volume=182&rft.spage=76&rft.date=2013 American Naturalist 182 1 76 90 http://dx.doi.org/10.1086/670648 URN:NBN:no-59808 Fulltext https://www.duo.uio.no/bitstream/handle/10852/57089/2/670648.pdf |
op_doi |
https://doi.org/10.1086/670648 |
container_title |
The American Naturalist |
container_volume |
182 |
container_issue |
1 |
container_start_page |
76 |
op_container_end_page |
90 |
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1766363038299979776 |