Seasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fish
Species with a broad and flexible diet may be at an advantage in a rapidly changing environment such as in today's Arctic ecosystems. Polar cod ( Boreogadus saida ), an abundant and ecologically important circumpolar Arctic fish, is often described as a zooplankton generalist feeder, which sugg...
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Online Access: | https://hdl.handle.net/10037/16851 https://doi.org/10.1002/ece3.5615 |
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ftunivtroemsoe:oai:munin.uit.no:10037/16851 2023-05-15T14:24:06+02:00 Seasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fish Cusa, Marine Lure Joana Berge, Jørgen Varpe, Øystein 2019-09-21 https://hdl.handle.net/10037/16851 https://doi.org/10.1002/ece3.5615 eng eng Wiley Ecology and Evolution Norges forskningsråd: 226417 Norges forskningsråd: Fulbright Arctic Initiative Norges forskningsråd: 227046 Norges forskningsråd: 257080 info:eu-repo/grantAgreement/RCN/POLARPROG/226417/Norway/Mare incognitum - ecological processes during the polar night// info:eu-repo/grantAgreement/RCN/POLARPROG/227046/Norway/Spatial and temporal variability in sea ice and primary production dynamics of the Arctic Ocean// info:eu-repo/grantAgreement/RCN/SSF/257080/Norway/Effects Of Seasonality And Spatial Heterogeneity On Polar Cod (Boreogadus Saida) Diet And Distribution In Svalbard Waters. RiS ID: 10442// Cusa M, Berge J, Varpe Ø. Seasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fish. Ecology and Evolution. 2019;9(19):11112-11121 FRIDAID 1746065 doi:10.1002/ece3.5615 2045-7758 https://hdl.handle.net/10037/16851 openAccess VDP::Mathematics and natural science: 400::Zoology and botany: 480 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2019 ftunivtroemsoe https://doi.org/10.1002/ece3.5615 2021-06-25T17:56:59Z Species with a broad and flexible diet may be at an advantage in a rapidly changing environment such as in today's Arctic ecosystems. Polar cod ( Boreogadus saida ), an abundant and ecologically important circumpolar Arctic fish, is often described as a zooplankton generalist feeder, which suggests that it may cope successfully with changes in prey composition. This description is justified based on the relatively broad diet of polar cod across sites and seasons. In this case study, we used polar cod dietary data from fall and winter and from two distinct environments, dominated either by Arctic or Atlantic water masses in Svalbard. Our results point to the importance of time and space when drawing conclusions on dietary plasticity and degree of specialization. Polar cod diet differed significantly between fall and the winter and between Arctic and Atlantic domains. Polar cod from Arctic domains displayed a strong realized population specialization on Themisto libellula in fall, and the larger dietary niche width observed in the winter was the product of realized individual specialization, with increased feeding on fish prey. Overall, we did not observe a generalized feeding behavior. If dietary niche width is to inform conservation management, we argue it must be recognized that populations from a single species may adopt seasonally contrasting degrees of dietary specialization and that these populations may differ in their vulnerability to climate‐induced changes in prey community composition. Article in Journal/Newspaper Arctic Arctic Boreogadus saida polar cod Svalbard Themisto Themisto libellula Zooplankton University of Tromsø: Munin Open Research Archive Arctic Svalbard Ecology and Evolution 9 19 11112 11121 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 Cusa, Marine Lure Joana Berge, Jørgen Varpe, Øystein Seasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fish |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480 |
description |
Species with a broad and flexible diet may be at an advantage in a rapidly changing environment such as in today's Arctic ecosystems. Polar cod ( Boreogadus saida ), an abundant and ecologically important circumpolar Arctic fish, is often described as a zooplankton generalist feeder, which suggests that it may cope successfully with changes in prey composition. This description is justified based on the relatively broad diet of polar cod across sites and seasons. In this case study, we used polar cod dietary data from fall and winter and from two distinct environments, dominated either by Arctic or Atlantic water masses in Svalbard. Our results point to the importance of time and space when drawing conclusions on dietary plasticity and degree of specialization. Polar cod diet differed significantly between fall and the winter and between Arctic and Atlantic domains. Polar cod from Arctic domains displayed a strong realized population specialization on Themisto libellula in fall, and the larger dietary niche width observed in the winter was the product of realized individual specialization, with increased feeding on fish prey. Overall, we did not observe a generalized feeding behavior. If dietary niche width is to inform conservation management, we argue it must be recognized that populations from a single species may adopt seasonally contrasting degrees of dietary specialization and that these populations may differ in their vulnerability to climate‐induced changes in prey community composition. |
format |
Article in Journal/Newspaper |
author |
Cusa, Marine Lure Joana Berge, Jørgen Varpe, Øystein |
author_facet |
Cusa, Marine Lure Joana Berge, Jørgen Varpe, Øystein |
author_sort |
Cusa, Marine Lure Joana |
title |
Seasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fish |
title_short |
Seasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fish |
title_full |
Seasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fish |
title_fullStr |
Seasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fish |
title_full_unstemmed |
Seasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fish |
title_sort |
seasonal shifts in feeding patterns: individual and population realized specialization in a high arctic fish |
publisher |
Wiley |
publishDate |
2019 |
url |
https://hdl.handle.net/10037/16851 https://doi.org/10.1002/ece3.5615 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Arctic Boreogadus saida polar cod Svalbard Themisto Themisto libellula Zooplankton |
genre_facet |
Arctic Arctic Boreogadus saida polar cod Svalbard Themisto Themisto libellula Zooplankton |
op_relation |
Ecology and Evolution Norges forskningsråd: 226417 Norges forskningsråd: Fulbright Arctic Initiative Norges forskningsråd: 227046 Norges forskningsråd: 257080 info:eu-repo/grantAgreement/RCN/POLARPROG/226417/Norway/Mare incognitum - ecological processes during the polar night// info:eu-repo/grantAgreement/RCN/POLARPROG/227046/Norway/Spatial and temporal variability in sea ice and primary production dynamics of the Arctic Ocean// info:eu-repo/grantAgreement/RCN/SSF/257080/Norway/Effects Of Seasonality And Spatial Heterogeneity On Polar Cod (Boreogadus Saida) Diet And Distribution In Svalbard Waters. RiS ID: 10442// Cusa M, Berge J, Varpe Ø. Seasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fish. Ecology and Evolution. 2019;9(19):11112-11121 FRIDAID 1746065 doi:10.1002/ece3.5615 2045-7758 https://hdl.handle.net/10037/16851 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.1002/ece3.5615 |
container_title |
Ecology and Evolution |
container_volume |
9 |
container_issue |
19 |
container_start_page |
11112 |
op_container_end_page |
11121 |
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1766296570658029568 |