Laboratory measures of isotope discrimination factors:comments on Caut, Angulo and Courchamp (2008, 2009)
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 wer...
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ftulancaster:oai:eprints.lancs.ac.uk:74641 2023-08-27T04:11:40+02:00 Laboratory measures of isotope discrimination factors:comments on Caut, Angulo and Courchamp (2008, 2009) Perga, Marie-Elodie Grey, Jonathan 2010-08 https://eprints.lancs.ac.uk/id/eprint/74641/ https://doi.org/10.1111/j.1365-2664.2009.01730.x unknown Perga, Marie-Elodie and Grey, Jonathan (2010) Laboratory measures of isotope discrimination factors:comments on Caut, Angulo and Courchamp (2008, 2009). Journal of Applied Ecology, 47 (4). pp. 942-947. ISSN 0021-8901 Journal Article PeerReviewed 2010 ftulancaster https://doi.org/10.1111/j.1365-2664.2009.01730.x 2023-08-03T22:27:47Z 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 Lancaster University: Lancaster Eprints Journal of Applied Ecology 47 4 942 947 |
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Lancaster University: Lancaster Eprints |
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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 and 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 and Courchamp (2008, 2009) |
title_short |
Laboratory measures of isotope discrimination factors:comments on Caut, Angulo and Courchamp (2008, 2009) |
title_full |
Laboratory measures of isotope discrimination factors:comments on Caut, Angulo and Courchamp (2008, 2009) |
title_fullStr |
Laboratory measures of isotope discrimination factors:comments on Caut, Angulo and Courchamp (2008, 2009) |
title_full_unstemmed |
Laboratory measures of isotope discrimination factors:comments on Caut, Angulo and Courchamp (2008, 2009) |
title_sort |
laboratory measures of isotope discrimination factors:comments on caut, angulo and courchamp (2008, 2009) |
publishDate |
2010 |
url |
https://eprints.lancs.ac.uk/id/eprint/74641/ https://doi.org/10.1111/j.1365-2664.2009.01730.x |
genre |
Rattus rattus |
genre_facet |
Rattus rattus |
op_relation |
Perga, Marie-Elodie and Grey, Jonathan (2010) Laboratory measures of isotope discrimination factors:comments on Caut, Angulo and Courchamp (2008, 2009). Journal of Applied Ecology, 47 (4). pp. 942-947. ISSN 0021-8901 |
op_doi |
https://doi.org/10.1111/j.1365-2664.2009.01730.x |
container_title |
Journal of Applied Ecology |
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47 |
container_issue |
4 |
container_start_page |
942 |
op_container_end_page |
947 |
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1775354659668492288 |