The Capelin invasion: evidence for a trophic shift in Arctic Char populations from the Cumberland Sound region, Nunavut, Canada
Climate change is having myriad effects on Arctic marine ecosystems and food webs. Anadromous Arctic Char, Salvelinus alpinus (Linnaeus, 1758), feed intensively at sea during summer. In Cumberland Sound, Nunavut, Canada, there has been a recent increased availability of a forage fish, Capelin. To in...
Published in: | Arctic Science |
---|---|
Main Authors: | , |
Format: | Article in Journal/Newspaper |
Language: | English French |
Published: |
Canadian Science Publishing
2021
|
Subjects: | |
Online Access: | https://doi.org/10.1139/as-2020-0001 https://doaj.org/article/eab3bbced547441783dcdb7ad21899d4 |
id |
fttriple:oai:gotriple.eu:oai:doaj.org/article:eab3bbced547441783dcdb7ad21899d4 |
---|---|
record_format |
openpolar |
spelling |
fttriple:oai:gotriple.eu:oai:doaj.org/article:eab3bbced547441783dcdb7ad21899d4 2023-05-15T14:22:24+02:00 The Capelin invasion: evidence for a trophic shift in Arctic Char populations from the Cumberland Sound region, Nunavut, Canada Kendra Lyn Ulrich Ross F. Tallman 2021-06-01 https://doi.org/10.1139/as-2020-0001 https://doaj.org/article/eab3bbced547441783dcdb7ad21899d4 en fr eng fre Canadian Science Publishing doi:10.1139/as-2020-0001 2368-7460 https://doaj.org/article/eab3bbced547441783dcdb7ad21899d4 undefined Arctic Science, Vol 7, Iss 2, Pp 413-435 (2021) capelin arctic char food web climate trophic change geo envir Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2021 fttriple https://doi.org/10.1139/as-2020-0001 2023-01-22T19:27:56Z Climate change is having myriad effects on Arctic marine ecosystems and food webs. Anadromous Arctic Char, Salvelinus alpinus (Linnaeus, 1758), feed intensively at sea during summer. In Cumberland Sound, Nunavut, Canada, there has been a recent increased availability of a forage fish, Capelin. To investigate changes over time in Arctic Char foraging, we assessed Arctic Char trophic niche from 2002 to 2011 using stomach content analysis and stable isotope analysis (δ13C and δ15N) of muscle tissue from two river/lake systems, Isuituq and Kipisa. We also compared population characteristics by calculating Fulton’s condition factor (K) and by fitting von Bertalanffy growth curves with length-at-age data. Results revealed Capelin were newly present in the diets of Arctic Char in 2011, describing a shift from a primarily invertebrate-based to a fish-based diet. No trend in δ15N over time suggests that the trophic level of Arctic Char has not changed; however, the δ15C for both systems converged in 2011 on a value suggestive of feeding on Capelin. Growth curves and length-at-age analyses suggest that foraging on Capelin may have increased individual growth. Changes in the growth and condition of Arctic Char in this region could have significant economic and cultural implications. Article in Journal/Newspaper Arctic Arctic Climate change Cumberland Sound Nunavut Salvelinus alpinus Unknown Arctic Canada Cumberland Sound ENVELOPE(-66.014,-66.014,65.334,65.334) Kipisa ENVELOPE(-66.947,-66.947,65.201,65.201) Nunavut Arctic Science 7 2 413 435 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English French |
topic |
capelin arctic char food web climate trophic change geo envir |
spellingShingle |
capelin arctic char food web climate trophic change geo envir Kendra Lyn Ulrich Ross F. Tallman The Capelin invasion: evidence for a trophic shift in Arctic Char populations from the Cumberland Sound region, Nunavut, Canada |
topic_facet |
capelin arctic char food web climate trophic change geo envir |
description |
Climate change is having myriad effects on Arctic marine ecosystems and food webs. Anadromous Arctic Char, Salvelinus alpinus (Linnaeus, 1758), feed intensively at sea during summer. In Cumberland Sound, Nunavut, Canada, there has been a recent increased availability of a forage fish, Capelin. To investigate changes over time in Arctic Char foraging, we assessed Arctic Char trophic niche from 2002 to 2011 using stomach content analysis and stable isotope analysis (δ13C and δ15N) of muscle tissue from two river/lake systems, Isuituq and Kipisa. We also compared population characteristics by calculating Fulton’s condition factor (K) and by fitting von Bertalanffy growth curves with length-at-age data. Results revealed Capelin were newly present in the diets of Arctic Char in 2011, describing a shift from a primarily invertebrate-based to a fish-based diet. No trend in δ15N over time suggests that the trophic level of Arctic Char has not changed; however, the δ15C for both systems converged in 2011 on a value suggestive of feeding on Capelin. Growth curves and length-at-age analyses suggest that foraging on Capelin may have increased individual growth. Changes in the growth and condition of Arctic Char in this region could have significant economic and cultural implications. |
format |
Article in Journal/Newspaper |
author |
Kendra Lyn Ulrich Ross F. Tallman |
author_facet |
Kendra Lyn Ulrich Ross F. Tallman |
author_sort |
Kendra Lyn Ulrich |
title |
The Capelin invasion: evidence for a trophic shift in Arctic Char populations from the Cumberland Sound region, Nunavut, Canada |
title_short |
The Capelin invasion: evidence for a trophic shift in Arctic Char populations from the Cumberland Sound region, Nunavut, Canada |
title_full |
The Capelin invasion: evidence for a trophic shift in Arctic Char populations from the Cumberland Sound region, Nunavut, Canada |
title_fullStr |
The Capelin invasion: evidence for a trophic shift in Arctic Char populations from the Cumberland Sound region, Nunavut, Canada |
title_full_unstemmed |
The Capelin invasion: evidence for a trophic shift in Arctic Char populations from the Cumberland Sound region, Nunavut, Canada |
title_sort |
capelin invasion: evidence for a trophic shift in arctic char populations from the cumberland sound region, nunavut, canada |
publisher |
Canadian Science Publishing |
publishDate |
2021 |
url |
https://doi.org/10.1139/as-2020-0001 https://doaj.org/article/eab3bbced547441783dcdb7ad21899d4 |
long_lat |
ENVELOPE(-66.014,-66.014,65.334,65.334) ENVELOPE(-66.947,-66.947,65.201,65.201) |
geographic |
Arctic Canada Cumberland Sound Kipisa Nunavut |
geographic_facet |
Arctic Canada Cumberland Sound Kipisa Nunavut |
genre |
Arctic Arctic Climate change Cumberland Sound Nunavut Salvelinus alpinus |
genre_facet |
Arctic Arctic Climate change Cumberland Sound Nunavut Salvelinus alpinus |
op_source |
Arctic Science, Vol 7, Iss 2, Pp 413-435 (2021) |
op_relation |
doi:10.1139/as-2020-0001 2368-7460 https://doaj.org/article/eab3bbced547441783dcdb7ad21899d4 |
op_rights |
undefined |
op_doi |
https://doi.org/10.1139/as-2020-0001 |
container_title |
Arctic Science |
container_volume |
7 |
container_issue |
2 |
container_start_page |
413 |
op_container_end_page |
435 |
_version_ |
1766294997783543808 |