Broad feeding niches of capelin and sand lance may overlap those of polar cod and other native fish in the eastern Canadian Arctic
As ocean temperatures rise, sub-Arctic capelin (Mallotus villosus) and sand lance (Ammodytes spp.) have become increasingly abundant in regions of the eastern Canadian Arctic. These fish have a similar trophic role to the keystone polar cod (Boreogadus saida), potentially competing for food resource...
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Online Access: | https://scholar.uwindsor.ca/glierpub/280 https://doi.org/10.1007/s00300-020-02738-8 |
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ftunivwindsor:oai:scholar.uwindsor.ca:glierpub-1282 2023-06-11T04:08:05+02:00 Broad feeding niches of capelin and sand lance may overlap those of polar cod and other native fish in the eastern Canadian Arctic Pedro, Sara Fisk, Aaron T. Ferguson, Steven H. Hussey, Nigel E. Kessel, Steven T. McKinney, Melissa A. 2020-11-01T07:00:00Z https://scholar.uwindsor.ca/glierpub/280 https://doi.org/10.1007/s00300-020-02738-8 unknown Scholarship at UWindsor https://scholar.uwindsor.ca/glierpub/280 doi:10.1007/s00300-020-02738-8 https://doi.org/10.1007/s00300-020-02738-8 Great Lakes Institute for Environmental Research Publications Ecological change Fatty acids Niche overlap Species composition Stable isotopes Trophic position text 2020 ftunivwindsor https://doi.org/10.1007/s00300-020-02738-8 2023-05-06T19:10:44Z As ocean temperatures rise, sub-Arctic capelin (Mallotus villosus) and sand lance (Ammodytes spp.) have become increasingly abundant in regions of the eastern Canadian Arctic. These fish have a similar trophic role to the keystone polar cod (Boreogadus saida), potentially competing for food resources when co-occurring. To evaluate this, we calculated feeding niche breadth and overlap based on fatty acids and δ15N- and δ13C-derived trophic position and carbon source, among sub-Arctic fish and 10 Arctic fish and invertebrates within low, mid, and high latitudes of the Canadian Arctic. Diverse feeding strategies including benthic Myoxocephalus sp., anadromous and pelagic fish, led to limited feeding niche overlap among species (13% average, range 0–96%). Feeding niche overlap between capelin and sand lance from the low Arctic was generally high (36–93%); while fatty acid niches of these fish overlapped 0–21% with polar cod in the mid and high Arctic, and their isotopic niches overlapped up to 96%. Capelin and sand lance showed 3–8 times broader feeding niches than polar cod. Regarding regional variation, polar cod had similar niche breadth between regions and highly overlapping fatty acid niches. Niche variation for Myoxocephalus sp. and Gammarus spp. between low and high Arctic was likely associated with more diverse sources of primary production in the shallower, more brackish low Arctic. Although regional variation in food availability play an important role defining feeding niches, broader niches and isotopic niche overlap with polar cod indicated a potential ecological advantage for capelin and sand lance over polar cod under climate change. Text Arctic Boreogadus saida Climate change polar cod University of Windsor, Ontario: Scholarship at UWindsor Arctic Polar Biology 43 11 1707 1724 |
institution |
Open Polar |
collection |
University of Windsor, Ontario: Scholarship at UWindsor |
op_collection_id |
ftunivwindsor |
language |
unknown |
topic |
Ecological change Fatty acids Niche overlap Species composition Stable isotopes Trophic position |
spellingShingle |
Ecological change Fatty acids Niche overlap Species composition Stable isotopes Trophic position Pedro, Sara Fisk, Aaron T. Ferguson, Steven H. Hussey, Nigel E. Kessel, Steven T. McKinney, Melissa A. Broad feeding niches of capelin and sand lance may overlap those of polar cod and other native fish in the eastern Canadian Arctic |
topic_facet |
Ecological change Fatty acids Niche overlap Species composition Stable isotopes Trophic position |
description |
As ocean temperatures rise, sub-Arctic capelin (Mallotus villosus) and sand lance (Ammodytes spp.) have become increasingly abundant in regions of the eastern Canadian Arctic. These fish have a similar trophic role to the keystone polar cod (Boreogadus saida), potentially competing for food resources when co-occurring. To evaluate this, we calculated feeding niche breadth and overlap based on fatty acids and δ15N- and δ13C-derived trophic position and carbon source, among sub-Arctic fish and 10 Arctic fish and invertebrates within low, mid, and high latitudes of the Canadian Arctic. Diverse feeding strategies including benthic Myoxocephalus sp., anadromous and pelagic fish, led to limited feeding niche overlap among species (13% average, range 0–96%). Feeding niche overlap between capelin and sand lance from the low Arctic was generally high (36–93%); while fatty acid niches of these fish overlapped 0–21% with polar cod in the mid and high Arctic, and their isotopic niches overlapped up to 96%. Capelin and sand lance showed 3–8 times broader feeding niches than polar cod. Regarding regional variation, polar cod had similar niche breadth between regions and highly overlapping fatty acid niches. Niche variation for Myoxocephalus sp. and Gammarus spp. between low and high Arctic was likely associated with more diverse sources of primary production in the shallower, more brackish low Arctic. Although regional variation in food availability play an important role defining feeding niches, broader niches and isotopic niche overlap with polar cod indicated a potential ecological advantage for capelin and sand lance over polar cod under climate change. |
format |
Text |
author |
Pedro, Sara Fisk, Aaron T. Ferguson, Steven H. Hussey, Nigel E. Kessel, Steven T. McKinney, Melissa A. |
author_facet |
Pedro, Sara Fisk, Aaron T. Ferguson, Steven H. Hussey, Nigel E. Kessel, Steven T. McKinney, Melissa A. |
author_sort |
Pedro, Sara |
title |
Broad feeding niches of capelin and sand lance may overlap those of polar cod and other native fish in the eastern Canadian Arctic |
title_short |
Broad feeding niches of capelin and sand lance may overlap those of polar cod and other native fish in the eastern Canadian Arctic |
title_full |
Broad feeding niches of capelin and sand lance may overlap those of polar cod and other native fish in the eastern Canadian Arctic |
title_fullStr |
Broad feeding niches of capelin and sand lance may overlap those of polar cod and other native fish in the eastern Canadian Arctic |
title_full_unstemmed |
Broad feeding niches of capelin and sand lance may overlap those of polar cod and other native fish in the eastern Canadian Arctic |
title_sort |
broad feeding niches of capelin and sand lance may overlap those of polar cod and other native fish in the eastern canadian arctic |
publisher |
Scholarship at UWindsor |
publishDate |
2020 |
url |
https://scholar.uwindsor.ca/glierpub/280 https://doi.org/10.1007/s00300-020-02738-8 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Boreogadus saida Climate change polar cod |
genre_facet |
Arctic Boreogadus saida Climate change polar cod |
op_source |
Great Lakes Institute for Environmental Research Publications |
op_relation |
https://scholar.uwindsor.ca/glierpub/280 doi:10.1007/s00300-020-02738-8 https://doi.org/10.1007/s00300-020-02738-8 |
op_doi |
https://doi.org/10.1007/s00300-020-02738-8 |
container_title |
Polar Biology |
container_volume |
43 |
container_issue |
11 |
container_start_page |
1707 |
op_container_end_page |
1724 |
_version_ |
1768381197667270656 |