Resource partitioning among five species of waterfowl ( Anas spp.) at an autumn migratory stopover: combining stable isotope and mercury biomarkers
The Saskatchewan River Delta (SRD) is North America’s largest inland delta and an important stopover site for waterfowl in the Central Flyway. However, little is known about their basic feeding ecology at this site and how species segregate or overlap in resource use. We used stable carbon (δ 13 C)...
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crcansciencepubl:10.1139/cjz-2016-0063 2023-12-17T10:18:26+01:00 Resource partitioning among five species of waterfowl ( Anas spp.) at an autumn migratory stopover: combining stable isotope and mercury biomarkers Asante, C.K. Hobson, K.A. Bond, A.L. Jardine, T.D. 2017 http://dx.doi.org/10.1139/cjz-2016-0063 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjz-2016-0063 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjz-2016-0063 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 95, issue 4, page 279-286 ISSN 0008-4301 1480-3283 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 2017 crcansciencepubl https://doi.org/10.1139/cjz-2016-0063 2023-11-19T13:38:41Z The Saskatchewan River Delta (SRD) is North America’s largest inland delta and an important stopover site for waterfowl in the Central Flyway. However, little is known about their basic feeding ecology at this site and how species segregate or overlap in resource use. We used stable carbon (δ 13 C) and nitrogen (δ 15 N) isotopes and mercury concentrations ([Hg]) in liver tissue to trace use of local nutrient sources by five waterfowl species and tested for differences in diets among species, sexes, and age groups. Macrophytes were the dominant food source for Northern Pintail (Anas acuta L., 1758) and American Wigeon (Anas americana Gmelin, 1789) with median proportions of 0.86 and 0.98, respectively. There was also evidence of partitioning of resources, as Blue-winged Teal (Anas discors L., 1766) and Green-winged Teal (Anas carolinensis Gmelin, 1789) consumed invertebrates, as did a subset of Mallards (Anas platyrhynchos L., 1758), suggesting that these birds might minimize competition for resources during the short staging period in the SRD when waterfowl densities are high. Other isotopes or tracers, such as [Hg] that varied among sources (0.03–0.20 μg·g –1 dry mass) and waterfowl species (0.22–3.19 μg·g –1 dry mass), can be used for further refining dietary estimates. Article in Journal/Newspaper Anas acuta Canadian Science Publishing (via Crossref) Canadian Journal of Zoology 95 4 279 286 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
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crcansciencepubl |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
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Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Asante, C.K. Hobson, K.A. Bond, A.L. Jardine, T.D. Resource partitioning among five species of waterfowl ( Anas spp.) at an autumn migratory stopover: combining stable isotope and mercury biomarkers |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
The Saskatchewan River Delta (SRD) is North America’s largest inland delta and an important stopover site for waterfowl in the Central Flyway. However, little is known about their basic feeding ecology at this site and how species segregate or overlap in resource use. We used stable carbon (δ 13 C) and nitrogen (δ 15 N) isotopes and mercury concentrations ([Hg]) in liver tissue to trace use of local nutrient sources by five waterfowl species and tested for differences in diets among species, sexes, and age groups. Macrophytes were the dominant food source for Northern Pintail (Anas acuta L., 1758) and American Wigeon (Anas americana Gmelin, 1789) with median proportions of 0.86 and 0.98, respectively. There was also evidence of partitioning of resources, as Blue-winged Teal (Anas discors L., 1766) and Green-winged Teal (Anas carolinensis Gmelin, 1789) consumed invertebrates, as did a subset of Mallards (Anas platyrhynchos L., 1758), suggesting that these birds might minimize competition for resources during the short staging period in the SRD when waterfowl densities are high. Other isotopes or tracers, such as [Hg] that varied among sources (0.03–0.20 μg·g –1 dry mass) and waterfowl species (0.22–3.19 μg·g –1 dry mass), can be used for further refining dietary estimates. |
format |
Article in Journal/Newspaper |
author |
Asante, C.K. Hobson, K.A. Bond, A.L. Jardine, T.D. |
author_facet |
Asante, C.K. Hobson, K.A. Bond, A.L. Jardine, T.D. |
author_sort |
Asante, C.K. |
title |
Resource partitioning among five species of waterfowl ( Anas spp.) at an autumn migratory stopover: combining stable isotope and mercury biomarkers |
title_short |
Resource partitioning among five species of waterfowl ( Anas spp.) at an autumn migratory stopover: combining stable isotope and mercury biomarkers |
title_full |
Resource partitioning among five species of waterfowl ( Anas spp.) at an autumn migratory stopover: combining stable isotope and mercury biomarkers |
title_fullStr |
Resource partitioning among five species of waterfowl ( Anas spp.) at an autumn migratory stopover: combining stable isotope and mercury biomarkers |
title_full_unstemmed |
Resource partitioning among five species of waterfowl ( Anas spp.) at an autumn migratory stopover: combining stable isotope and mercury biomarkers |
title_sort |
resource partitioning among five species of waterfowl ( anas spp.) at an autumn migratory stopover: combining stable isotope and mercury biomarkers |
publisher |
Canadian Science Publishing |
publishDate |
2017 |
url |
http://dx.doi.org/10.1139/cjz-2016-0063 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjz-2016-0063 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjz-2016-0063 |
genre |
Anas acuta |
genre_facet |
Anas acuta |
op_source |
Canadian Journal of Zoology volume 95, issue 4, page 279-286 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjz-2016-0063 |
container_title |
Canadian Journal of Zoology |
container_volume |
95 |
container_issue |
4 |
container_start_page |
279 |
op_container_end_page |
286 |
_version_ |
1785563914539368448 |