Quantifying importance of marine prey in the diets of two partially anadromous fishes
The importance of marine prey sources for partially anadromous fishes has received little study and is complicated by considerable plasticity in life history. We determined proportional contributions of marine, freshwater benthic, and freshwater pelagic prey to anadromous and resident Arctic char (S...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Canadian Science Publishing
2011
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crcansciencepubl:10.1139/f2011-111 2024-06-23T07:49:26+00:00 Quantifying importance of marine prey in the diets of two partially anadromous fishes Swanson, Heidi K. Kidd, Karen A. Reist, James D. Trudel, Marc 2011 http://dx.doi.org/10.1139/f2011-111 http://www.nrcresearchpress.com/doi/full-xml/10.1139/f2011-111 http://www.nrcresearchpress.com/doi/pdf/10.1139/f2011-111 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 68, issue 11, page 2020-2028 ISSN 0706-652X 1205-7533 journal-article 2011 crcansciencepubl https://doi.org/10.1139/f2011-111 2024-05-30T08:13:48Z The importance of marine prey sources for partially anadromous fishes has received little study and is complicated by considerable plasticity in life history. We determined proportional contributions of marine, freshwater benthic, and freshwater pelagic prey to anadromous and resident Arctic char (Salvelinus alpinus) and lake trout (Salvelinus namaycush) from several partially anadromous populations in the Canadian Arctic. Bayesian mixing models (MixSIR) applied to δ 34 S and δ 13 C ratios in lake-specific models indicated that marine prey accounted for 90%–91% of anadromous Arctic char diet and 60%–66% of anadromous lake trout diet. When these estimates were combined with proportion of anadromous individuals in partially anadromous populations, marine food sources accounted for 31%–44% of Arctic char population productivity and 16%–26% of lake trout population productivity. Although future research is needed to refine and quantify variability around these estimates, our results will allow better predictions of the effects of anthropogenic stressors on partially anadromous fishes. Article in Journal/Newspaper Arctic Salvelinus alpinus Canadian Science Publishing Arctic Canadian Journal of Fisheries and Aquatic Sciences 68 11 2020 2028 |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
The importance of marine prey sources for partially anadromous fishes has received little study and is complicated by considerable plasticity in life history. We determined proportional contributions of marine, freshwater benthic, and freshwater pelagic prey to anadromous and resident Arctic char (Salvelinus alpinus) and lake trout (Salvelinus namaycush) from several partially anadromous populations in the Canadian Arctic. Bayesian mixing models (MixSIR) applied to δ 34 S and δ 13 C ratios in lake-specific models indicated that marine prey accounted for 90%–91% of anadromous Arctic char diet and 60%–66% of anadromous lake trout diet. When these estimates were combined with proportion of anadromous individuals in partially anadromous populations, marine food sources accounted for 31%–44% of Arctic char population productivity and 16%–26% of lake trout population productivity. Although future research is needed to refine and quantify variability around these estimates, our results will allow better predictions of the effects of anthropogenic stressors on partially anadromous fishes. |
author2 |
Trudel, Marc |
format |
Article in Journal/Newspaper |
author |
Swanson, Heidi K. Kidd, Karen A. Reist, James D. |
spellingShingle |
Swanson, Heidi K. Kidd, Karen A. Reist, James D. Quantifying importance of marine prey in the diets of two partially anadromous fishes |
author_facet |
Swanson, Heidi K. Kidd, Karen A. Reist, James D. |
author_sort |
Swanson, Heidi K. |
title |
Quantifying importance of marine prey in the diets of two partially anadromous fishes |
title_short |
Quantifying importance of marine prey in the diets of two partially anadromous fishes |
title_full |
Quantifying importance of marine prey in the diets of two partially anadromous fishes |
title_fullStr |
Quantifying importance of marine prey in the diets of two partially anadromous fishes |
title_full_unstemmed |
Quantifying importance of marine prey in the diets of two partially anadromous fishes |
title_sort |
quantifying importance of marine prey in the diets of two partially anadromous fishes |
publisher |
Canadian Science Publishing |
publishDate |
2011 |
url |
http://dx.doi.org/10.1139/f2011-111 http://www.nrcresearchpress.com/doi/full-xml/10.1139/f2011-111 http://www.nrcresearchpress.com/doi/pdf/10.1139/f2011-111 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Salvelinus alpinus |
genre_facet |
Arctic Salvelinus alpinus |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 68, issue 11, page 2020-2028 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f2011-111 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
68 |
container_issue |
11 |
container_start_page |
2020 |
op_container_end_page |
2028 |
_version_ |
1802639830601957376 |