Spatiotemporal variability in diet composition of Greenland halibut (Reinhardtius hippoglossoides) from the eastern Canadian Arctic
Greenland halibut (Reinhardtius hippoglossoides) sustain one of the most lucrative fisheries in the eastern Canadian Arctic and Labrador Sea. This species also plays an important role in food web connectivity and benthic–pelagic coupling. Despite the relatively rich knowledge of this species, R. hip...
Published in: | Journal of Fish Biology |
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Format: | Article in Journal/Newspaper |
Language: | French |
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2023
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Online Access: | https://semaphore.uqar.ca/id/eprint/2450/ https://semaphore.uqar.ca/id/eprint/2450/1/Felix_Tremblay-Gagnon_et_al_aout2023.pdf https://doi.org/10.1111/jfb.15519 |
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ftunivquebecar:oai:semaphore.uqar.ca:2450 2023-12-03T10:15:04+01:00 Spatiotemporal variability in diet composition of Greenland halibut (Reinhardtius hippoglossoides) from the eastern Canadian Arctic Tremblay-Gagnon, Félix Brown-Vuillemin, Sarah Skanes, Katherine Polaczek, Hannah Walkusz, Wojciech Robert, Dominique Deslauriers, David 2023 application/pdf https://semaphore.uqar.ca/id/eprint/2450/ https://semaphore.uqar.ca/id/eprint/2450/1/Felix_Tremblay-Gagnon_et_al_aout2023.pdf https://doi.org/10.1111/jfb.15519 fr fre https://semaphore.uqar.ca/id/eprint/2450/1/Felix_Tremblay-Gagnon_et_al_aout2023.pdf Tremblay-Gagnon, Félix ORCID logoorcid:0000-0002-3183-7976 , Brown-Vuillemin, Sarah ORCID logoorcid:0000-0002-8010-7099 , Skanes, Katherine, Polaczek, Hannah, Walkusz, Wojciech, Robert, Dominique ORCID logoorcid:0000-0002-0628-2841 et Deslauriers, David ORCID logoorcid:0000-0002-3876-7691 (2023). Spatiotemporal variability in diet composition of Greenland halibut (Reinhardtius hippoglossoides) from the eastern Canadian Arctic. Journal of Fish Biology . cc_by_nc_4 Article Évalué par les pairs 2023 ftunivquebecar https://doi.org/10.1111/jfb.15519 2023-11-05T00:10:52Z Greenland halibut (Reinhardtius hippoglossoides) sustain one of the most lucrative fisheries in the eastern Canadian Arctic and Labrador Sea. This species also plays an important role in food web connectivity and benthic–pelagic coupling. Despite the relatively rich knowledge of this species, R. hippoglossoides ecology in these specific areas remains poorly understood. The main aim of this study was to characterize the diet of this deepwater fish in the Labrador Sea and Davis and Hudson Straits and characterize the predator–prey relationship with northern shrimp (Pandalus borealis), another commercially important species in the region. Stomach contents analyses were conducted on 1199 fish captured from 2018 to 2020. Small specimens (<20 cm) fed on invertebrates, whereas larger individuals (>60 cm) fed primarily on fish, indicative of size-related changes in diet composition. The relative abundance of Pandalus shrimp species in the environment was reflected in the diet. Location appeared to be the most influential variable on feeding patterns. Distinct oceanographic conditions among areas, resulting in differences in prey availability, could explain these results. Arctic cod (Boreogadus saida) and redfish (Sebastes sp.) were selected in locations where fish prey were the most abundant. These results shed light on the opportunistic nature of R. hippoglossoides and its preference for fish at large size. With the rapidly changing oceanographic conditions of Arctic waters, a distributional change in the biomass of shrimp is expected. Results suggest that an increase in abundance of predatory groundfish species in the system (e.g., Sebastes sp.) could lead to acute predation on shrimp and competition with R. hippoglossoides. By revealing key trophic links within the demersal ecosystem, this work provides valuable information on the development of ecosystem approaches to fisheries management for the region. -- Keywords : food web Labrador Sea northern shrimp predator–prey relationship stomach content ... Article in Journal/Newspaper Arctic Arctic cod Arctic Boreogadus saida Greenland Labrador Sea northern shrimp Pandalus borealis Université du Québec à Rimouski (UQAR): Sémaphore Arctic Greenland Hudson Journal of Fish Biology |
institution |
Open Polar |
collection |
Université du Québec à Rimouski (UQAR): Sémaphore |
op_collection_id |
ftunivquebecar |
language |
French |
description |
Greenland halibut (Reinhardtius hippoglossoides) sustain one of the most lucrative fisheries in the eastern Canadian Arctic and Labrador Sea. This species also plays an important role in food web connectivity and benthic–pelagic coupling. Despite the relatively rich knowledge of this species, R. hippoglossoides ecology in these specific areas remains poorly understood. The main aim of this study was to characterize the diet of this deepwater fish in the Labrador Sea and Davis and Hudson Straits and characterize the predator–prey relationship with northern shrimp (Pandalus borealis), another commercially important species in the region. Stomach contents analyses were conducted on 1199 fish captured from 2018 to 2020. Small specimens (<20 cm) fed on invertebrates, whereas larger individuals (>60 cm) fed primarily on fish, indicative of size-related changes in diet composition. The relative abundance of Pandalus shrimp species in the environment was reflected in the diet. Location appeared to be the most influential variable on feeding patterns. Distinct oceanographic conditions among areas, resulting in differences in prey availability, could explain these results. Arctic cod (Boreogadus saida) and redfish (Sebastes sp.) were selected in locations where fish prey were the most abundant. These results shed light on the opportunistic nature of R. hippoglossoides and its preference for fish at large size. With the rapidly changing oceanographic conditions of Arctic waters, a distributional change in the biomass of shrimp is expected. Results suggest that an increase in abundance of predatory groundfish species in the system (e.g., Sebastes sp.) could lead to acute predation on shrimp and competition with R. hippoglossoides. By revealing key trophic links within the demersal ecosystem, this work provides valuable information on the development of ecosystem approaches to fisheries management for the region. -- Keywords : food web Labrador Sea northern shrimp predator–prey relationship stomach content ... |
format |
Article in Journal/Newspaper |
author |
Tremblay-Gagnon, Félix Brown-Vuillemin, Sarah Skanes, Katherine Polaczek, Hannah Walkusz, Wojciech Robert, Dominique Deslauriers, David |
spellingShingle |
Tremblay-Gagnon, Félix Brown-Vuillemin, Sarah Skanes, Katherine Polaczek, Hannah Walkusz, Wojciech Robert, Dominique Deslauriers, David Spatiotemporal variability in diet composition of Greenland halibut (Reinhardtius hippoglossoides) from the eastern Canadian Arctic |
author_facet |
Tremblay-Gagnon, Félix Brown-Vuillemin, Sarah Skanes, Katherine Polaczek, Hannah Walkusz, Wojciech Robert, Dominique Deslauriers, David |
author_sort |
Tremblay-Gagnon, Félix |
title |
Spatiotemporal variability in diet composition of Greenland halibut (Reinhardtius hippoglossoides) from the eastern Canadian Arctic |
title_short |
Spatiotemporal variability in diet composition of Greenland halibut (Reinhardtius hippoglossoides) from the eastern Canadian Arctic |
title_full |
Spatiotemporal variability in diet composition of Greenland halibut (Reinhardtius hippoglossoides) from the eastern Canadian Arctic |
title_fullStr |
Spatiotemporal variability in diet composition of Greenland halibut (Reinhardtius hippoglossoides) from the eastern Canadian Arctic |
title_full_unstemmed |
Spatiotemporal variability in diet composition of Greenland halibut (Reinhardtius hippoglossoides) from the eastern Canadian Arctic |
title_sort |
spatiotemporal variability in diet composition of greenland halibut (reinhardtius hippoglossoides) from the eastern canadian arctic |
publishDate |
2023 |
url |
https://semaphore.uqar.ca/id/eprint/2450/ https://semaphore.uqar.ca/id/eprint/2450/1/Felix_Tremblay-Gagnon_et_al_aout2023.pdf https://doi.org/10.1111/jfb.15519 |
geographic |
Arctic Greenland Hudson |
geographic_facet |
Arctic Greenland Hudson |
genre |
Arctic Arctic cod Arctic Boreogadus saida Greenland Labrador Sea northern shrimp Pandalus borealis |
genre_facet |
Arctic Arctic cod Arctic Boreogadus saida Greenland Labrador Sea northern shrimp Pandalus borealis |
op_relation |
https://semaphore.uqar.ca/id/eprint/2450/1/Felix_Tremblay-Gagnon_et_al_aout2023.pdf Tremblay-Gagnon, Félix ORCID logoorcid:0000-0002-3183-7976 , Brown-Vuillemin, Sarah ORCID logoorcid:0000-0002-8010-7099 , Skanes, Katherine, Polaczek, Hannah, Walkusz, Wojciech, Robert, Dominique ORCID logoorcid:0000-0002-0628-2841 et Deslauriers, David ORCID logoorcid:0000-0002-3876-7691 (2023). Spatiotemporal variability in diet composition of Greenland halibut (Reinhardtius hippoglossoides) from the eastern Canadian Arctic. Journal of Fish Biology . |
op_rights |
cc_by_nc_4 |
op_doi |
https://doi.org/10.1111/jfb.15519 |
container_title |
Journal of Fish Biology |
_version_ |
1784262063041806336 |