Resource partitioning may limit interspecific competition among Arctic fish species during early life
Arctic cod (Boreogadus saida) strongly dominates the ichthyoplankton assemblages of High Arctic seas, hence competition with other native species seldom has been studied. Yet, interspecific competition could negatively impact the survival of early life stages of fishes in Arctic areas where higher d...
Published in: | Elementa: Science of the Anthropocene |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2022
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Online Access: | https://pure.au.dk/portal/da/publications/resource-partitioning-may-limit-interspecific-competition-among-arctic-fish-species-during-early-life(764bd93b-d5c1-4a88-9b52-bd6cf596d7b6).html https://doi.org/10.1525/elementa.2021.00038 http://www.scopus.com/inward/record.url?scp=85126066817&partnerID=8YFLogxK |
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ftuniaarhuspubl:oai:pure.atira.dk:publications/764bd93b-d5c1-4a88-9b52-bd6cf596d7b6 2023-05-15T14:24:37+02:00 Resource partitioning may limit interspecific competition among Arctic fish species during early life Bouchard, Caroline Chawarski, Julek Geoffroy, Maxime Klasmeier, Apasiri Møller, Eva Friis Mohn, Christian Agersted, Mette Dalgaard 2022-02-28 https://pure.au.dk/portal/da/publications/resource-partitioning-may-limit-interspecific-competition-among-arctic-fish-species-during-early-life(764bd93b-d5c1-4a88-9b52-bd6cf596d7b6).html https://doi.org/10.1525/elementa.2021.00038 http://www.scopus.com/inward/record.url?scp=85126066817&partnerID=8YFLogxK eng eng info:eu-repo/semantics/openAccess Bouchard , C , Chawarski , J , Geoffroy , M , Klasmeier , A , Møller , E F , Mohn , C & Agersted , M D 2022 , ' Resource partitioning may limit interspecific competition among Arctic fish species during early life ' , Elementa , vol. 10 , no. 1 , 00038 . https://doi.org/10.1525/elementa.2021.00038 Arctic cod Boreogadus saida Calanus Fish larvae Hydroacoustics Ichthyoplankton Zooplankton article 2022 ftuniaarhuspubl https://doi.org/10.1525/elementa.2021.00038 2023-03-15T23:56:09Z Arctic cod (Boreogadus saida) strongly dominates the ichthyoplankton assemblages of High Arctic seas, hence competition with other native species seldom has been studied. Yet, interspecific competition could negatively impact the survival of early life stages of fishes in Arctic areas where higher diversity prevails. We surveyed the ichthyoplankton community of the Greenland Sea, in August-September 2017. Gadids (mostly Arctic cod, with a low number of ice cod Arctogadus glacialis) and non-gadids (bigeye sculpin Triglops nybelini and gelatinous snailfish Liparis fabricii) co-dominated age-0 fish assemblages. Here, we document their diet, prey selectivity, horizontal and vertical distributions as well as that of their prey to assess resource partitioning and the potential for interspecific competition. All fish species occupied the top 30 m of the water column, but Arctic cod occurred in highest abundances over the continental slope, whereas other species distributed almost exclusively over the continental shelf. A particle track analysis suggests that Arctic cod larvae could have hatched in the open waters of the Northeast Water Polynya, drifted with the East Greenland Current, and benefited from the high secondary production associated with these oceanographic features. The diet of gadids did not overlap significantly with the diet of non-gadids, but strong selectivity for Pseudocalanus spp. and Calanus spp. copepodites among the larvae suggests potential competition for these key prey items, although limited by size partitioning of the prey. We thus conclude that interspecific competition among early life stages of Arctic fishes is limited for now. However, changing conditions and the northward range expansion of boreal species following climate change could increase competition and, in turn, negatively affect the recruitment of Arctic ichthyoplankton. Article in Journal/Newspaper Arctic Arctic cod Arctic Arctogadus glacialis Boreogadus saida Climate change East Greenland east greenland current Greenland Greenland Sea Zooplankton Aarhus University: Research Arctic Greenland Elementa: Science of the Anthropocene 10 1 |
institution |
Open Polar |
collection |
Aarhus University: Research |
op_collection_id |
ftuniaarhuspubl |
language |
English |
topic |
Arctic cod Boreogadus saida Calanus Fish larvae Hydroacoustics Ichthyoplankton Zooplankton |
spellingShingle |
Arctic cod Boreogadus saida Calanus Fish larvae Hydroacoustics Ichthyoplankton Zooplankton Bouchard, Caroline Chawarski, Julek Geoffroy, Maxime Klasmeier, Apasiri Møller, Eva Friis Mohn, Christian Agersted, Mette Dalgaard Resource partitioning may limit interspecific competition among Arctic fish species during early life |
topic_facet |
Arctic cod Boreogadus saida Calanus Fish larvae Hydroacoustics Ichthyoplankton Zooplankton |
description |
Arctic cod (Boreogadus saida) strongly dominates the ichthyoplankton assemblages of High Arctic seas, hence competition with other native species seldom has been studied. Yet, interspecific competition could negatively impact the survival of early life stages of fishes in Arctic areas where higher diversity prevails. We surveyed the ichthyoplankton community of the Greenland Sea, in August-September 2017. Gadids (mostly Arctic cod, with a low number of ice cod Arctogadus glacialis) and non-gadids (bigeye sculpin Triglops nybelini and gelatinous snailfish Liparis fabricii) co-dominated age-0 fish assemblages. Here, we document their diet, prey selectivity, horizontal and vertical distributions as well as that of their prey to assess resource partitioning and the potential for interspecific competition. All fish species occupied the top 30 m of the water column, but Arctic cod occurred in highest abundances over the continental slope, whereas other species distributed almost exclusively over the continental shelf. A particle track analysis suggests that Arctic cod larvae could have hatched in the open waters of the Northeast Water Polynya, drifted with the East Greenland Current, and benefited from the high secondary production associated with these oceanographic features. The diet of gadids did not overlap significantly with the diet of non-gadids, but strong selectivity for Pseudocalanus spp. and Calanus spp. copepodites among the larvae suggests potential competition for these key prey items, although limited by size partitioning of the prey. We thus conclude that interspecific competition among early life stages of Arctic fishes is limited for now. However, changing conditions and the northward range expansion of boreal species following climate change could increase competition and, in turn, negatively affect the recruitment of Arctic ichthyoplankton. |
format |
Article in Journal/Newspaper |
author |
Bouchard, Caroline Chawarski, Julek Geoffroy, Maxime Klasmeier, Apasiri Møller, Eva Friis Mohn, Christian Agersted, Mette Dalgaard |
author_facet |
Bouchard, Caroline Chawarski, Julek Geoffroy, Maxime Klasmeier, Apasiri Møller, Eva Friis Mohn, Christian Agersted, Mette Dalgaard |
author_sort |
Bouchard, Caroline |
title |
Resource partitioning may limit interspecific competition among Arctic fish species during early life |
title_short |
Resource partitioning may limit interspecific competition among Arctic fish species during early life |
title_full |
Resource partitioning may limit interspecific competition among Arctic fish species during early life |
title_fullStr |
Resource partitioning may limit interspecific competition among Arctic fish species during early life |
title_full_unstemmed |
Resource partitioning may limit interspecific competition among Arctic fish species during early life |
title_sort |
resource partitioning may limit interspecific competition among arctic fish species during early life |
publishDate |
2022 |
url |
https://pure.au.dk/portal/da/publications/resource-partitioning-may-limit-interspecific-competition-among-arctic-fish-species-during-early-life(764bd93b-d5c1-4a88-9b52-bd6cf596d7b6).html https://doi.org/10.1525/elementa.2021.00038 http://www.scopus.com/inward/record.url?scp=85126066817&partnerID=8YFLogxK |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Arctic cod Arctic Arctogadus glacialis Boreogadus saida Climate change East Greenland east greenland current Greenland Greenland Sea Zooplankton |
genre_facet |
Arctic Arctic cod Arctic Arctogadus glacialis Boreogadus saida Climate change East Greenland east greenland current Greenland Greenland Sea Zooplankton |
op_source |
Bouchard , C , Chawarski , J , Geoffroy , M , Klasmeier , A , Møller , E F , Mohn , C & Agersted , M D 2022 , ' Resource partitioning may limit interspecific competition among Arctic fish species during early life ' , Elementa , vol. 10 , no. 1 , 00038 . https://doi.org/10.1525/elementa.2021.00038 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1525/elementa.2021.00038 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
10 |
container_issue |
1 |
_version_ |
1766297058868723712 |