Laboratory measures of isotope discrimination factors: comments on Caut, Angulo & Courchamp (2008, 2009)
Summary 1. In a recent paper, Caut, Angulo & Courchamp (2008, Functional Ecology , 22 , 255) experimentally measured isotope discrimination factors for rats Rattus rattus . In their study, values for their discrimination factors spanned a much larger range than previously reported in the literat...
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crwiley:10.1111/j.1365-2664.2009.01730.x 2024-09-09T20:05:01+00:00 Laboratory measures of isotope discrimination factors: comments on Caut, Angulo & Courchamp (2008, 2009) Perga, Marie‐Elodie Grey, Jonathan 2010 http://dx.doi.org/10.1111/j.1365-2664.2009.01730.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2664.2009.01730.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2664.2009.01730.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Applied Ecology volume 47, issue 4, page 942-947 ISSN 0021-8901 1365-2664 journal-article 2010 crwiley https://doi.org/10.1111/j.1365-2664.2009.01730.x 2024-06-20T04:25:44Z Summary 1. In a recent paper, Caut, Angulo & Courchamp (2008, Functional Ecology , 22 , 255) experimentally measured isotope discrimination factors for rats Rattus rattus . In their study, values for their discrimination factors spanned a much larger range than previously reported in the literature and were found to be negatively related to the stable isotope composition of the diet that the rats were fed. 2. In a subsequent meta‐analysis, Caut, Angulo & Courchamp (2009, Journal of Applied Ecology , 46 , 443) confirmed the trends they had found in their previous study and pointed to a method for obtaining adequate values for discrimination factors when they could not be measured experimentally. 3. Synthesis and applications . We argue that the discrimination factors determined by Caut et al. (2008) were an artefact of experimental design. We also argue that the reported linear relationships between the stable isotope composition of the diet and isotope discrimination factors in their follow‐up meta‐analyses ( Caut et al. 2009 ) do not reflect relevant trends that can be extrapolated to the field and that the method they proposed for obtaining adequate values for discrimination factors should be used with considerable care. Article in Journal/Newspaper Rattus rattus Wiley Online Library Journal of Applied Ecology 47 4 942 947 |
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English |
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Summary 1. In a recent paper, Caut, Angulo & Courchamp (2008, Functional Ecology , 22 , 255) experimentally measured isotope discrimination factors for rats Rattus rattus . In their study, values for their discrimination factors spanned a much larger range than previously reported in the literature and were found to be negatively related to the stable isotope composition of the diet that the rats were fed. 2. In a subsequent meta‐analysis, Caut, Angulo & Courchamp (2009, Journal of Applied Ecology , 46 , 443) confirmed the trends they had found in their previous study and pointed to a method for obtaining adequate values for discrimination factors when they could not be measured experimentally. 3. Synthesis and applications . We argue that the discrimination factors determined by Caut et al. (2008) were an artefact of experimental design. We also argue that the reported linear relationships between the stable isotope composition of the diet and isotope discrimination factors in their follow‐up meta‐analyses ( Caut et al. 2009 ) do not reflect relevant trends that can be extrapolated to the field and that the method they proposed for obtaining adequate values for discrimination factors should be used with considerable care. |
format |
Article in Journal/Newspaper |
author |
Perga, Marie‐Elodie Grey, Jonathan |
spellingShingle |
Perga, Marie‐Elodie Grey, Jonathan Laboratory measures of isotope discrimination factors: comments on Caut, Angulo & Courchamp (2008, 2009) |
author_facet |
Perga, Marie‐Elodie Grey, Jonathan |
author_sort |
Perga, Marie‐Elodie |
title |
Laboratory measures of isotope discrimination factors: comments on Caut, Angulo & Courchamp (2008, 2009) |
title_short |
Laboratory measures of isotope discrimination factors: comments on Caut, Angulo & Courchamp (2008, 2009) |
title_full |
Laboratory measures of isotope discrimination factors: comments on Caut, Angulo & Courchamp (2008, 2009) |
title_fullStr |
Laboratory measures of isotope discrimination factors: comments on Caut, Angulo & Courchamp (2008, 2009) |
title_full_unstemmed |
Laboratory measures of isotope discrimination factors: comments on Caut, Angulo & Courchamp (2008, 2009) |
title_sort |
laboratory measures of isotope discrimination factors: comments on caut, angulo & courchamp (2008, 2009) |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1111/j.1365-2664.2009.01730.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2664.2009.01730.x https://besjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2664.2009.01730.x |
genre |
Rattus rattus |
genre_facet |
Rattus rattus |
op_source |
Journal of Applied Ecology volume 47, issue 4, page 942-947 ISSN 0021-8901 1365-2664 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2664.2009.01730.x |
container_title |
Journal of Applied Ecology |
container_volume |
47 |
container_issue |
4 |
container_start_page |
942 |
op_container_end_page |
947 |
_version_ |
1809937311909019648 |