From diet to hair and blood: empirical estimation of discrimination factors for C and N stable isotopes in five terrestrial mammals
Abstract Carbon and nitrogen stable isotope ratios are used widely to describe wildlife animal diet composition and trophic interactions. To reconstruct consumer diet, the isotopic differences between consumers and their diet items—called the trophic discrimination factor (TDF)—must be known. Proxie...
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Online Access: | http://dx.doi.org/10.1093/jmammal/gyaa108 http://academic.oup.com/jmammal/article-pdf/101/5/1332/34882300/gyaa108.pdf |
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croxfordunivpr:10.1093/jmammal/gyaa108 2024-02-11T10:02:53+01:00 From diet to hair and blood: empirical estimation of discrimination factors for C and N stable isotopes in five terrestrial mammals Rioux, Ève Pelletier, Fanie St-Laurent, Martin-Hugues Constantine, Rochelle Natural Sciences and Engineering Research Council of Canada NSERC Université du Québec à Rimouski Canada Research Chair 2020 http://dx.doi.org/10.1093/jmammal/gyaa108 http://academic.oup.com/jmammal/article-pdf/101/5/1332/34882300/gyaa108.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Journal of Mammalogy volume 101, issue 5, page 1332-1344 ISSN 0022-2372 1545-1542 Nature and Landscape Conservation Genetics Animal Science and Zoology Ecology Ecology, Evolution, Behavior and Systematics journal-article 2020 croxfordunivpr https://doi.org/10.1093/jmammal/gyaa108 2024-01-12T09:43:13Z Abstract Carbon and nitrogen stable isotope ratios are used widely to describe wildlife animal diet composition and trophic interactions. To reconstruct consumer diet, the isotopic differences between consumers and their diet items—called the trophic discrimination factor (TDF)—must be known. Proxies of diet composition are sensitive to the accuracy of TDFs. However, specific TDFs are still missing for many species and tissues because only a few controlled studies have been carried out on captive animals. The aim of this study was to estimate TDFs for hair and blood for carbon and nitrogen stable isotopes for caribou, moose, white-tailed deer, eastern coyote, and black bear. We obtained stable isotope ratios for diet items, hair, and blood samples, of 21 captive adult mammals. Diet–tissue discrimination factors for carbon in hair (∆ 13CLE) ranged from 0.96‰ to 3.72‰ for cervids, 3.01‰ to 3.76‰ for coyote, and 5.15‰ to 6.35‰ for black bear, while nitrogen discrimination factors (∆ 15N) ranged from 2.58‰ to 5.95‰ for cervids, 2.90‰ to 3.13‰ for coyote, and 4.48‰ to 5.44‰ for black bear. The ∆ 13CLE values in coyote blood components ranged from 2.20‰ to 2.69‰ while ∆ 15N ranged from 3.30‰ to 4.41‰. In caribou serum, ∆ 13CLE reached 3.34 ± 1.28‰ while ∆ 15N reached 5.02 ± 0.07‰. The TDFs calculated in this study will allow the evaluation of diet composition and trophic relationships between these five mammal species and will have important implications for the study of endangered caribou populations for which the use of noninvasive tissue sampling is highly relevant. Article in Journal/Newspaper caribou Oxford University Press Journal of Mammalogy 101 5 1332 1344 |
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Oxford University Press |
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croxfordunivpr |
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English |
topic |
Nature and Landscape Conservation Genetics Animal Science and Zoology Ecology Ecology, Evolution, Behavior and Systematics |
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Nature and Landscape Conservation Genetics Animal Science and Zoology Ecology Ecology, Evolution, Behavior and Systematics Rioux, Ève Pelletier, Fanie St-Laurent, Martin-Hugues From diet to hair and blood: empirical estimation of discrimination factors for C and N stable isotopes in five terrestrial mammals |
topic_facet |
Nature and Landscape Conservation Genetics Animal Science and Zoology Ecology Ecology, Evolution, Behavior and Systematics |
description |
Abstract Carbon and nitrogen stable isotope ratios are used widely to describe wildlife animal diet composition and trophic interactions. To reconstruct consumer diet, the isotopic differences between consumers and their diet items—called the trophic discrimination factor (TDF)—must be known. Proxies of diet composition are sensitive to the accuracy of TDFs. However, specific TDFs are still missing for many species and tissues because only a few controlled studies have been carried out on captive animals. The aim of this study was to estimate TDFs for hair and blood for carbon and nitrogen stable isotopes for caribou, moose, white-tailed deer, eastern coyote, and black bear. We obtained stable isotope ratios for diet items, hair, and blood samples, of 21 captive adult mammals. Diet–tissue discrimination factors for carbon in hair (∆ 13CLE) ranged from 0.96‰ to 3.72‰ for cervids, 3.01‰ to 3.76‰ for coyote, and 5.15‰ to 6.35‰ for black bear, while nitrogen discrimination factors (∆ 15N) ranged from 2.58‰ to 5.95‰ for cervids, 2.90‰ to 3.13‰ for coyote, and 4.48‰ to 5.44‰ for black bear. The ∆ 13CLE values in coyote blood components ranged from 2.20‰ to 2.69‰ while ∆ 15N ranged from 3.30‰ to 4.41‰. In caribou serum, ∆ 13CLE reached 3.34 ± 1.28‰ while ∆ 15N reached 5.02 ± 0.07‰. The TDFs calculated in this study will allow the evaluation of diet composition and trophic relationships between these five mammal species and will have important implications for the study of endangered caribou populations for which the use of noninvasive tissue sampling is highly relevant. |
author2 |
Constantine, Rochelle Natural Sciences and Engineering Research Council of Canada NSERC Université du Québec à Rimouski Canada Research Chair |
format |
Article in Journal/Newspaper |
author |
Rioux, Ève Pelletier, Fanie St-Laurent, Martin-Hugues |
author_facet |
Rioux, Ève Pelletier, Fanie St-Laurent, Martin-Hugues |
author_sort |
Rioux, Ève |
title |
From diet to hair and blood: empirical estimation of discrimination factors for C and N stable isotopes in five terrestrial mammals |
title_short |
From diet to hair and blood: empirical estimation of discrimination factors for C and N stable isotopes in five terrestrial mammals |
title_full |
From diet to hair and blood: empirical estimation of discrimination factors for C and N stable isotopes in five terrestrial mammals |
title_fullStr |
From diet to hair and blood: empirical estimation of discrimination factors for C and N stable isotopes in five terrestrial mammals |
title_full_unstemmed |
From diet to hair and blood: empirical estimation of discrimination factors for C and N stable isotopes in five terrestrial mammals |
title_sort |
from diet to hair and blood: empirical estimation of discrimination factors for c and n stable isotopes in five terrestrial mammals |
publisher |
Oxford University Press (OUP) |
publishDate |
2020 |
url |
http://dx.doi.org/10.1093/jmammal/gyaa108 http://academic.oup.com/jmammal/article-pdf/101/5/1332/34882300/gyaa108.pdf |
genre |
caribou |
genre_facet |
caribou |
op_source |
Journal of Mammalogy volume 101, issue 5, page 1332-1344 ISSN 0022-2372 1545-1542 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/jmammal/gyaa108 |
container_title |
Journal of Mammalogy |
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101 |
container_issue |
5 |
container_start_page |
1332 |
op_container_end_page |
1344 |
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1790598978369224704 |