Hybridization effects on phenotypic plasticity: experimental compensatory growth in farmed-wild Atlantic salmon
Compensatory growth (CG) is a means by which organisms can increase their growth rate above their routine growth rate after a period of environmentally induced growth depression. Despite a focus on the implications of CG for aquaculture, little research has evaluated the effect of domesticated-wild...
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ftdalhouse:oai:DalSpace.library.dal.ca:10222/29013 2023-05-15T15:31:19+02:00 Hybridization effects on phenotypic plasticity: experimental compensatory growth in farmed-wild Atlantic salmon Morris, Matthew R. J. Fraser, Dylan J. Eddington, James Hutchings, Jeffrey Alexander 2013-07-04T18:43:09Z https://doi.org/10.1111/j.1752-4571.2010.00159.x http://hdl.handle.net/10222/29013 unknown Evolutionary Applications 1752-4571 http://dx.doi.org/10.1111/j.1752-4571.2010.00159.x http://hdl.handle.net/10222/29013 4 3 444 article 2013 ftdalhouse https://doi.org/10.1111/j.1752-4571.2010.00159.x 2021-12-29T18:08:48Z Compensatory growth (CG) is a means by which organisms can increase their growth rate above their routine growth rate after a period of environmentally induced growth depression. Despite a focus on the implications of CG for aquaculture, little research has evaluated the effect of domesticated-wild hybridization on CG. Any deviation in the mean compensatory ability of hybrids relative to their wild progenitors, or any notable costs to compensation in terms of body morphology, could affect the ability of hybrids to persist in changing environments. We compared CG of farmed, wild and hybrid (F1, F2, wild backcross) juvenile Atlantic salmon (Salmo salar). Wild salmon experienced both lower routine and CG rates relative to farmed salmon, while hybrids were intermediate. However, the compensatory responses (slopes of the reaction norms) for each cross were parallel, indicating that hybridization did not affect the CG response itself. Morphological costs to compensation were not detected. In addition to contributing to risk assessments of the consequences of interbreeding between wild and escaped domesticated organisms, we conclude that plasticity studies on domesticated-wild hybrids and their progenitors are useful for testing basic predictions about the evolution of phenotypic plasticity, as well as understanding the evolutionary significance of hybrids. Article in Journal/Newspaper Atlantic salmon Salmo salar Dalhousie University: DalSpace Institutional Repository Evolutionary Applications 4 3 444 458 |
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Dalhousie University: DalSpace Institutional Repository |
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Compensatory growth (CG) is a means by which organisms can increase their growth rate above their routine growth rate after a period of environmentally induced growth depression. Despite a focus on the implications of CG for aquaculture, little research has evaluated the effect of domesticated-wild hybridization on CG. Any deviation in the mean compensatory ability of hybrids relative to their wild progenitors, or any notable costs to compensation in terms of body morphology, could affect the ability of hybrids to persist in changing environments. We compared CG of farmed, wild and hybrid (F1, F2, wild backcross) juvenile Atlantic salmon (Salmo salar). Wild salmon experienced both lower routine and CG rates relative to farmed salmon, while hybrids were intermediate. However, the compensatory responses (slopes of the reaction norms) for each cross were parallel, indicating that hybridization did not affect the CG response itself. Morphological costs to compensation were not detected. In addition to contributing to risk assessments of the consequences of interbreeding between wild and escaped domesticated organisms, we conclude that plasticity studies on domesticated-wild hybrids and their progenitors are useful for testing basic predictions about the evolution of phenotypic plasticity, as well as understanding the evolutionary significance of hybrids. |
format |
Article in Journal/Newspaper |
author |
Morris, Matthew R. J. Fraser, Dylan J. Eddington, James Hutchings, Jeffrey Alexander |
spellingShingle |
Morris, Matthew R. J. Fraser, Dylan J. Eddington, James Hutchings, Jeffrey Alexander Hybridization effects on phenotypic plasticity: experimental compensatory growth in farmed-wild Atlantic salmon |
author_facet |
Morris, Matthew R. J. Fraser, Dylan J. Eddington, James Hutchings, Jeffrey Alexander |
author_sort |
Morris, Matthew R. J. |
title |
Hybridization effects on phenotypic plasticity: experimental compensatory growth in farmed-wild Atlantic salmon |
title_short |
Hybridization effects on phenotypic plasticity: experimental compensatory growth in farmed-wild Atlantic salmon |
title_full |
Hybridization effects on phenotypic plasticity: experimental compensatory growth in farmed-wild Atlantic salmon |
title_fullStr |
Hybridization effects on phenotypic plasticity: experimental compensatory growth in farmed-wild Atlantic salmon |
title_full_unstemmed |
Hybridization effects on phenotypic plasticity: experimental compensatory growth in farmed-wild Atlantic salmon |
title_sort |
hybridization effects on phenotypic plasticity: experimental compensatory growth in farmed-wild atlantic salmon |
publishDate |
2013 |
url |
https://doi.org/10.1111/j.1752-4571.2010.00159.x http://hdl.handle.net/10222/29013 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
Evolutionary Applications 1752-4571 http://dx.doi.org/10.1111/j.1752-4571.2010.00159.x http://hdl.handle.net/10222/29013 4 3 444 |
op_doi |
https://doi.org/10.1111/j.1752-4571.2010.00159.x |
container_title |
Evolutionary Applications |
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4 |
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3 |
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444 |
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458 |
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1766361817458671616 |