Fine-scale spatial variation of northern shrimp and Atlantic cod across three Norwegian fjord systems and implications for management

The spatial complexity of coastal ecosystems represents a challenge for the management of inshore resources. Here we compared two large fjord systems in northern Norway that have been closed for all bottom trawling for 50 years to a fjord with continuous shrimp fishery with bottom trawls. No signifi...

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Published in:Estuarine, Coastal and Shelf Science
Main Authors: Zimmermann, Fabian, Tengvall, Jessica, Strand, Hans Kristian, Nedreaas, Kjell Harald, Thangstad, Trude Hauge, Husson, Berengere, Søvik, Guldborg
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2023
Subjects:
Norway
atlantic cod
Gadus morhua
Northern Norway
northern shrimp
Pandalus borealis
Online Access:https://hdl.handle.net/11250/3100072
https://doi.org/10.1016/j.ecss.2023.108435
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spelling ftunivbergen:oai:bora.uib.no:11250/3100072 2023-12-03T10:18:58+01:00 Fine-scale spatial variation of northern shrimp and Atlantic cod across three Norwegian fjord systems and implications for management Zimmermann, Fabian Tengvall, Jessica Strand, Hans Kristian Nedreaas, Kjell Harald Thangstad, Trude Hauge Husson, Berengere Søvik, Guldborg 2023 application/pdf https://hdl.handle.net/11250/3100072 https://doi.org/10.1016/j.ecss.2023.108435 eng eng Elsevier Norges forskningsråd: 299554 urn:issn:0272-7714 https://hdl.handle.net/11250/3100072 https://doi.org/10.1016/j.ecss.2023.108435 cristin:2175026 Estuarine, Coastal and Shelf Science. 2023, 292, 108435. Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no Copyright 2023 the authors 108435 Estuarine, Coastal and Shelf Science 292 Journal article Peer reviewed 2023 ftunivbergen https://doi.org/10.1016/j.ecss.2023.108435 2023-11-09T00:08:36Z The spatial complexity of coastal ecosystems represents a challenge for the management of inshore resources. Here we compared two large fjord systems in northern Norway that have been closed for all bottom trawling for 50 years to a fjord with continuous shrimp fishery with bottom trawls. No significant differences were found between fjords with and without commercial trawling in population density and stock composition of northern shrimp (Pandalus borealis) and their main predator, Atlantic cod (Gadus morhua). Shrimp density was instead linked with bottom depth, while shrimp size and stage composition as well as cod density were explained by seasonal effects and shrimp density. For shrimp, a large degree of the observed variation was captured by spatial correlation that could not be explained by other covariates. The results underline the complex ecology in heavily structured coastal habitats and indicate that coastal shrimp dynamics are shaped by an interplay of multiple ecological and environmental drivers, possibly in concert with local genetic adaptations. The substantial fine-scale spatial variation adds to the challenges of assessing and managing fisheries resources in these fjord ecosystems. Because shrimp are an important forage species, notably as prey for cod, there are potential management conflicts between rebuilding cod stocks and reopening closed shrimp trawling areas. publishedVersion Article in Journal/Newspaper atlantic cod Gadus morhua Northern Norway northern shrimp Pandalus borealis University of Bergen: Bergen Open Research Archive (BORA-UiB) Norway Estuarine, Coastal and Shelf Science 292 108435
institution Open Polar
collection University of Bergen: Bergen Open Research Archive (BORA-UiB)
op_collection_id ftunivbergen
language English
description The spatial complexity of coastal ecosystems represents a challenge for the management of inshore resources. Here we compared two large fjord systems in northern Norway that have been closed for all bottom trawling for 50 years to a fjord with continuous shrimp fishery with bottom trawls. No significant differences were found between fjords with and without commercial trawling in population density and stock composition of northern shrimp (Pandalus borealis) and their main predator, Atlantic cod (Gadus morhua). Shrimp density was instead linked with bottom depth, while shrimp size and stage composition as well as cod density were explained by seasonal effects and shrimp density. For shrimp, a large degree of the observed variation was captured by spatial correlation that could not be explained by other covariates. The results underline the complex ecology in heavily structured coastal habitats and indicate that coastal shrimp dynamics are shaped by an interplay of multiple ecological and environmental drivers, possibly in concert with local genetic adaptations. The substantial fine-scale spatial variation adds to the challenges of assessing and managing fisheries resources in these fjord ecosystems. Because shrimp are an important forage species, notably as prey for cod, there are potential management conflicts between rebuilding cod stocks and reopening closed shrimp trawling areas. publishedVersion
format Article in Journal/Newspaper
author Zimmermann, Fabian
Tengvall, Jessica
Strand, Hans Kristian
Nedreaas, Kjell Harald
Thangstad, Trude Hauge
Husson, Berengere
Søvik, Guldborg
spellingShingle Zimmermann, Fabian
Tengvall, Jessica
Strand, Hans Kristian
Nedreaas, Kjell Harald
Thangstad, Trude Hauge
Husson, Berengere
Søvik, Guldborg
Fine-scale spatial variation of northern shrimp and Atlantic cod across three Norwegian fjord systems and implications for management
author_facet Zimmermann, Fabian
Tengvall, Jessica
Strand, Hans Kristian
Nedreaas, Kjell Harald
Thangstad, Trude Hauge
Husson, Berengere
Søvik, Guldborg
author_sort Zimmermann, Fabian
title Fine-scale spatial variation of northern shrimp and Atlantic cod across three Norwegian fjord systems and implications for management
title_short Fine-scale spatial variation of northern shrimp and Atlantic cod across three Norwegian fjord systems and implications for management
title_full Fine-scale spatial variation of northern shrimp and Atlantic cod across three Norwegian fjord systems and implications for management
title_fullStr Fine-scale spatial variation of northern shrimp and Atlantic cod across three Norwegian fjord systems and implications for management
title_full_unstemmed Fine-scale spatial variation of northern shrimp and Atlantic cod across three Norwegian fjord systems and implications for management
title_sort fine-scale spatial variation of northern shrimp and atlantic cod across three norwegian fjord systems and implications for management
publisher Elsevier
publishDate 2023
url https://hdl.handle.net/11250/3100072
https://doi.org/10.1016/j.ecss.2023.108435
geographic Norway
geographic_facet Norway
genre atlantic cod
Gadus morhua
Northern Norway
northern shrimp
Pandalus borealis
genre_facet atlantic cod
Gadus morhua
Northern Norway
northern shrimp
Pandalus borealis
op_source 108435
Estuarine, Coastal and Shelf Science
292
op_relation Norges forskningsråd: 299554
urn:issn:0272-7714
https://hdl.handle.net/11250/3100072
https://doi.org/10.1016/j.ecss.2023.108435
cristin:2175026
Estuarine, Coastal and Shelf Science. 2023, 292, 108435.
op_rights Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
http://creativecommons.org/licenses/by-nc-nd/4.0/deed.no
Copyright 2023 the authors
op_doi https://doi.org/10.1016/j.ecss.2023.108435
container_title Estuarine, Coastal and Shelf Science
container_volume 292
container_start_page 108435
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