Multi-indicator evidence for habitat use and trophic strategy segregation of two sympatric forms of Arctic char from the Cumberland Sound region of Nunavut, Canada
We analyzed Arctic char (Salvelinus alpinus (Linnaeus, 1758)) stable isotope ratios and fatty acid composition from two geographically proximal Nunavut lakes, Qasigiyat and Iqalugaarjuit, to determine if anadromous and resident Arctic char occupied different trophic niches. Resident Arctic char had...
Published in: | Arctic Science |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2021
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/as-2019-0039 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2019-0039 https://cdnsciencepub.com/doi/pdf/10.1139/as-2019-0039 |
id |
crcansciencepubl:10.1139/as-2019-0039 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/as-2019-0039 2024-09-15T17:49:58+00:00 Multi-indicator evidence for habitat use and trophic strategy segregation of two sympatric forms of Arctic char from the Cumberland Sound region of Nunavut, Canada Ulrich, Kendra L. Tallman, Ross F. 2021 http://dx.doi.org/10.1139/as-2019-0039 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2019-0039 https://cdnsciencepub.com/doi/pdf/10.1139/as-2019-0039 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Arctic Science volume 7, issue 2, page 1-33 ISSN 2368-7460 2368-7460 journal-article 2021 crcansciencepubl https://doi.org/10.1139/as-2019-0039 2024-07-25T04:10:08Z We analyzed Arctic char (Salvelinus alpinus (Linnaeus, 1758)) stable isotope ratios and fatty acid composition from two geographically proximal Nunavut lakes, Qasigiyat and Iqalugaarjuit, to determine if anadromous and resident Arctic char occupied different trophic niches. Resident Arctic char had lower δ 13 C and δ 34 S, indicative of freshwater feeding, compared with anadromous individuals. Significantly lower δ 15 N of residents suggests the ecotypes feed at different trophic levels. Significantly wider δ 13 C and δ 15 N ranges in residents implied a broader trophic niche or a wider range in baseline prey isotope values. Results also provide further evidence for resident use of the estuarine environment in Qasigiyat. Immature Arctic char occupy a different trophic niche than both resident and anadromous fish within Iqalugaarjuit, but this relationship is less clear in Qasigiyat. Distinct stable isotope and fatty acid profiles indicate that resident and anadromous Arctic char have distinct trophic niches: marine for anadromous, freshwater for resident. Immature Arctic char seem to occupy a distinct niche from both anadromous and resident fish, which likely relates to use of both freshwater and estuarine environments, depending on developmental stage. We show the first evidence of the fatty acid differences and niche segregation between sympatric anadromous and resident ecotypes in Arctic char. Article in Journal/Newspaper Arctic Cumberland Sound Nunavut Salvelinus alpinus Canadian Science Publishing Arctic Science 1 33 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
op_collection_id |
crcansciencepubl |
language |
English |
description |
We analyzed Arctic char (Salvelinus alpinus (Linnaeus, 1758)) stable isotope ratios and fatty acid composition from two geographically proximal Nunavut lakes, Qasigiyat and Iqalugaarjuit, to determine if anadromous and resident Arctic char occupied different trophic niches. Resident Arctic char had lower δ 13 C and δ 34 S, indicative of freshwater feeding, compared with anadromous individuals. Significantly lower δ 15 N of residents suggests the ecotypes feed at different trophic levels. Significantly wider δ 13 C and δ 15 N ranges in residents implied a broader trophic niche or a wider range in baseline prey isotope values. Results also provide further evidence for resident use of the estuarine environment in Qasigiyat. Immature Arctic char occupy a different trophic niche than both resident and anadromous fish within Iqalugaarjuit, but this relationship is less clear in Qasigiyat. Distinct stable isotope and fatty acid profiles indicate that resident and anadromous Arctic char have distinct trophic niches: marine for anadromous, freshwater for resident. Immature Arctic char seem to occupy a distinct niche from both anadromous and resident fish, which likely relates to use of both freshwater and estuarine environments, depending on developmental stage. We show the first evidence of the fatty acid differences and niche segregation between sympatric anadromous and resident ecotypes in Arctic char. |
format |
Article in Journal/Newspaper |
author |
Ulrich, Kendra L. Tallman, Ross F. |
spellingShingle |
Ulrich, Kendra L. Tallman, Ross F. Multi-indicator evidence for habitat use and trophic strategy segregation of two sympatric forms of Arctic char from the Cumberland Sound region of Nunavut, Canada |
author_facet |
Ulrich, Kendra L. Tallman, Ross F. |
author_sort |
Ulrich, Kendra L. |
title |
Multi-indicator evidence for habitat use and trophic strategy segregation of two sympatric forms of Arctic char from the Cumberland Sound region of Nunavut, Canada |
title_short |
Multi-indicator evidence for habitat use and trophic strategy segregation of two sympatric forms of Arctic char from the Cumberland Sound region of Nunavut, Canada |
title_full |
Multi-indicator evidence for habitat use and trophic strategy segregation of two sympatric forms of Arctic char from the Cumberland Sound region of Nunavut, Canada |
title_fullStr |
Multi-indicator evidence for habitat use and trophic strategy segregation of two sympatric forms of Arctic char from the Cumberland Sound region of Nunavut, Canada |
title_full_unstemmed |
Multi-indicator evidence for habitat use and trophic strategy segregation of two sympatric forms of Arctic char from the Cumberland Sound region of Nunavut, Canada |
title_sort |
multi-indicator evidence for habitat use and trophic strategy segregation of two sympatric forms of arctic char from the cumberland sound region of nunavut, canada |
publisher |
Canadian Science Publishing |
publishDate |
2021 |
url |
http://dx.doi.org/10.1139/as-2019-0039 https://cdnsciencepub.com/doi/full-xml/10.1139/as-2019-0039 https://cdnsciencepub.com/doi/pdf/10.1139/as-2019-0039 |
genre |
Arctic Cumberland Sound Nunavut Salvelinus alpinus |
genre_facet |
Arctic Cumberland Sound Nunavut Salvelinus alpinus |
op_source |
Arctic Science volume 7, issue 2, page 1-33 ISSN 2368-7460 2368-7460 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/as-2019-0039 |
container_title |
Arctic Science |
container_start_page |
1 |
op_container_end_page |
33 |
_version_ |
1810291820053135360 |