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...
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Canadian Science Publishing
2021
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Online Access: | https://doi.org/10.1139/as-2019-0039 https://doaj.org/article/860c32642bb64e95b6d8aab04910c6b1 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:860c32642bb64e95b6d8aab04910c6b1 2023-05-15T14:22:18+02:00 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 Kendra L. Ulrich Ross F. Tallman 2021-06-01 https://doi.org/10.1139/as-2019-0039 https://doaj.org/article/860c32642bb64e95b6d8aab04910c6b1 en fr eng fre Canadian Science Publishing doi:10.1139/as-2019-0039 2368-7460 https://doaj.org/article/860c32642bb64e95b6d8aab04910c6b1 undefined Arctic Science, Vol 7, Iss 2, Pp 1-33 (2021) arctic char ecotype trophic niche envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.1139/as-2019-0039 2023-01-22T18:39:02Z 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 δ13C and δ34S, indicative of freshwater feeding, compared with anadromous individuals. Significantly lower δ15N of residents suggests the ecotypes feed at different trophic levels. Significantly wider δ13C and δ15N 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 Arctic Cumberland Sound Nunavut Salvelinus alpinus Unknown Arctic Canada Cumberland Sound ENVELOPE(-66.014,-66.014,65.334,65.334) Nunavut Arctic Science 7 2 1 33 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English French |
topic |
arctic char ecotype trophic niche envir geo |
spellingShingle |
arctic char ecotype trophic niche envir geo Kendra L. Ulrich Ross F. Tallman 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 |
topic_facet |
arctic char ecotype trophic niche envir geo |
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 δ13C and δ34S, indicative of freshwater feeding, compared with anadromous individuals. Significantly lower δ15N of residents suggests the ecotypes feed at different trophic levels. Significantly wider δ13C and δ15N 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 |
Kendra L. Ulrich Ross F. Tallman |
author_facet |
Kendra L. Ulrich Ross F. Tallman |
author_sort |
Kendra L. Ulrich |
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 |
https://doi.org/10.1139/as-2019-0039 https://doaj.org/article/860c32642bb64e95b6d8aab04910c6b1 |
long_lat |
ENVELOPE(-66.014,-66.014,65.334,65.334) |
geographic |
Arctic Canada Cumberland Sound Nunavut |
geographic_facet |
Arctic Canada Cumberland Sound Nunavut |
genre |
Arctic Arctic Cumberland Sound Nunavut Salvelinus alpinus |
genre_facet |
Arctic Arctic Cumberland Sound Nunavut Salvelinus alpinus |
op_source |
Arctic Science, Vol 7, Iss 2, Pp 1-33 (2021) |
op_relation |
doi:10.1139/as-2019-0039 2368-7460 https://doaj.org/article/860c32642bb64e95b6d8aab04910c6b1 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1139/as-2019-0039 |
container_title |
Arctic Science |
container_volume |
7 |
container_issue |
2 |
container_start_page |
1 |
op_container_end_page |
33 |
_version_ |
1766294941794828288 |