Stock collapse and its effect on species interactions: Cod and herring in the Norwegian‐Barents Seas system as an example
Abstract Both the Norwegian Spring Spawning herring ( Clupea harengus ) and the Northeast Arctic (NEA) cod ( Gadus morhua ) are examples of strong stock reduction and decline of the associated fisheries due to overfishing followed by a recovery. Cod and herring are both part of the Barents Sea ecosy...
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crwiley:10.1002/ece3.8336 2024-05-19T07:36:39+00:00 Stock collapse and its effect on species interactions: Cod and herring in the Norwegian‐Barents Seas system as an example Durant, Joël M. Aarvold, Leana Langangen, Øystein Norges Forskningsråd 2021 http://dx.doi.org/10.1002/ece3.8336 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.8336 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.8336 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 11, issue 23, page 16993-17004 ISSN 2045-7758 2045-7758 Nature and Landscape Conservation Ecology Ecology, Evolution, Behavior and Systematics journal-article 2021 crwiley https://doi.org/10.1002/ece3.8336 2024-04-22T07:32:56Z Abstract Both the Norwegian Spring Spawning herring ( Clupea harengus ) and the Northeast Arctic (NEA) cod ( Gadus morhua ) are examples of strong stock reduction and decline of the associated fisheries due to overfishing followed by a recovery. Cod and herring are both part of the Barents Sea ecosystem, which has experienced major warming events in the early (1920–1940) and late 20th century. While the collapse or near collapse of these stocks seems to be linked to an instability created by overfishing and climate, the difference of population dynamics before and after is not fully understood. In particular, it is unclear how the changes in population dynamics before and after the collapses are associated with biotic interactions. The combination of the availability of unique long‐term time series for herring and cod makes it a well‐suited study system to investigate the effects of collapse. We examine how species interactions may differently affect the herring and cod population dynamic before and after a collapse. Particularly we explore, using a GAM modeling approach, how herring could affect cod and vice versa . We found that the effect of cod biomass on herring that was generally positive (i.e., covariation) but the effect became negative after the collapse (i.e., predation or competition). Likewise a change occurred for the cod, the juvenile herring biomass that had no effect before the collapse had a negative effect after. Our results indicate that the population collapses may alter the inter‐specific interactions and response to abiotic environmental changes. While the stocks are at similar abundance levels before and after the collapses, the system is potentially different in its functioning and may require different management action. Article in Journal/Newspaper Arctic Barents Sea Gadus morhua Wiley Online Library Ecology and Evolution 11 23 16993 17004 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
topic |
Nature and Landscape Conservation Ecology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Nature and Landscape Conservation Ecology Ecology, Evolution, Behavior and Systematics Durant, Joël M. Aarvold, Leana Langangen, Øystein Stock collapse and its effect on species interactions: Cod and herring in the Norwegian‐Barents Seas system as an example |
topic_facet |
Nature and Landscape Conservation Ecology Ecology, Evolution, Behavior and Systematics |
description |
Abstract Both the Norwegian Spring Spawning herring ( Clupea harengus ) and the Northeast Arctic (NEA) cod ( Gadus morhua ) are examples of strong stock reduction and decline of the associated fisheries due to overfishing followed by a recovery. Cod and herring are both part of the Barents Sea ecosystem, which has experienced major warming events in the early (1920–1940) and late 20th century. While the collapse or near collapse of these stocks seems to be linked to an instability created by overfishing and climate, the difference of population dynamics before and after is not fully understood. In particular, it is unclear how the changes in population dynamics before and after the collapses are associated with biotic interactions. The combination of the availability of unique long‐term time series for herring and cod makes it a well‐suited study system to investigate the effects of collapse. We examine how species interactions may differently affect the herring and cod population dynamic before and after a collapse. Particularly we explore, using a GAM modeling approach, how herring could affect cod and vice versa . We found that the effect of cod biomass on herring that was generally positive (i.e., covariation) but the effect became negative after the collapse (i.e., predation or competition). Likewise a change occurred for the cod, the juvenile herring biomass that had no effect before the collapse had a negative effect after. Our results indicate that the population collapses may alter the inter‐specific interactions and response to abiotic environmental changes. While the stocks are at similar abundance levels before and after the collapses, the system is potentially different in its functioning and may require different management action. |
author2 |
Norges Forskningsråd |
format |
Article in Journal/Newspaper |
author |
Durant, Joël M. Aarvold, Leana Langangen, Øystein |
author_facet |
Durant, Joël M. Aarvold, Leana Langangen, Øystein |
author_sort |
Durant, Joël M. |
title |
Stock collapse and its effect on species interactions: Cod and herring in the Norwegian‐Barents Seas system as an example |
title_short |
Stock collapse and its effect on species interactions: Cod and herring in the Norwegian‐Barents Seas system as an example |
title_full |
Stock collapse and its effect on species interactions: Cod and herring in the Norwegian‐Barents Seas system as an example |
title_fullStr |
Stock collapse and its effect on species interactions: Cod and herring in the Norwegian‐Barents Seas system as an example |
title_full_unstemmed |
Stock collapse and its effect on species interactions: Cod and herring in the Norwegian‐Barents Seas system as an example |
title_sort |
stock collapse and its effect on species interactions: cod and herring in the norwegian‐barents seas system as an example |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1002/ece3.8336 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.8336 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.8336 |
genre |
Arctic Barents Sea Gadus morhua |
genre_facet |
Arctic Barents Sea Gadus morhua |
op_source |
Ecology and Evolution volume 11, issue 23, page 16993-17004 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.8336 |
container_title |
Ecology and Evolution |
container_volume |
11 |
container_issue |
23 |
container_start_page |
16993 |
op_container_end_page |
17004 |
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1799475787354603520 |