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...
Published in: | Estuarine, Coastal and Shelf Science |
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Language: | English |
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Online Access: | https://hdl.handle.net/11250/3100072 https://doi.org/10.1016/j.ecss.2023.108435 |
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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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1784266092805357568 |