Seasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fish
Abstract 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, whi...
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ftdoajarticles:oai:doaj.org/article:fed6366f223b4e749b90f4c4fd111494 2023-05-15T14:30:29+02:00 Seasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fish Marine Cusa Jørgen Berge Øystein Varpe 2019-10-01T00:00:00Z https://doi.org/10.1002/ece3.5615 https://doaj.org/article/fed6366f223b4e749b90f4c4fd111494 EN eng Wiley https://doi.org/10.1002/ece3.5615 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.5615 https://doaj.org/article/fed6366f223b4e749b90f4c4fd111494 Ecology and Evolution, Vol 9, Iss 19, Pp 11112-11121 (2019) Arctic cod Boreogadus saida diet niche width polar cod predator–prey interactions Ecology QH540-549.5 article 2019 ftdoajarticles https://doi.org/10.1002/ece3.5615 2022-12-31T07:50:21Z Abstract 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 cod Arctic Boreogadus saida polar cod Svalbard Themisto Themisto libellula Zooplankton Directory of Open Access Journals: DOAJ Articles Arctic Svalbard Ecology and Evolution 9 19 11112 11121 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Arctic cod Boreogadus saida diet niche width polar cod predator–prey interactions Ecology QH540-549.5 |
spellingShingle |
Arctic cod Boreogadus saida diet niche width polar cod predator–prey interactions Ecology QH540-549.5 Marine Cusa Jørgen Berge Øystein Varpe Seasonal shifts in feeding patterns: Individual and population realized specialization in a high Arctic fish |
topic_facet |
Arctic cod Boreogadus saida diet niche width polar cod predator–prey interactions Ecology QH540-549.5 |
description |
Abstract 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 |
Marine Cusa Jørgen Berge Øystein Varpe |
author_facet |
Marine Cusa Jørgen Berge Øystein Varpe |
author_sort |
Marine Cusa |
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://doi.org/10.1002/ece3.5615 https://doaj.org/article/fed6366f223b4e749b90f4c4fd111494 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic cod Arctic Boreogadus saida polar cod Svalbard Themisto Themisto libellula Zooplankton |
genre_facet |
Arctic cod Arctic Boreogadus saida polar cod Svalbard Themisto Themisto libellula Zooplankton |
op_source |
Ecology and Evolution, Vol 9, Iss 19, Pp 11112-11121 (2019) |
op_relation |
https://doi.org/10.1002/ece3.5615 https://doaj.org/toc/2045-7758 2045-7758 doi:10.1002/ece3.5615 https://doaj.org/article/fed6366f223b4e749b90f4c4fd111494 |
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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1766304333185417216 |