Stock collapse and its effect on species interactions: Cod and herring in the Norwegian-Barents Seas system as an example
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 h...
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ftoslouniv:oai:www.duo.uio.no:10852/89722 2023-05-15T15:13:43+02:00 Stock collapse and its effect on species interactions: Cod and herring in the Norwegian-Barents Seas system as an example Durant, Joël Deris, Leana Langangen, Øystein Ole Gahr 2021-12-03T15:41:39Z http://hdl.handle.net/10852/89722 http://urn.nb.no/URN:NBN:no-92325 https://doi.org/10.1002/ece3.8336 EN eng NFR/244647 NFR/280467 NFR/280468 http://urn.nb.no/URN:NBN:no-92325 Durant, Joël Deris, Leana Langangen, Øystein Ole Gahr . Stock collapse and its effect on species interactions: Cod and herring in the Norwegian-Barents Seas system as an example. Ecology and Evolution. 2021 http://hdl.handle.net/10852/89722 1964578 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Ecology and Evolution&rft.volume=&rft.spage=&rft.date=2021 Ecology and Evolution 11 23 16993 17004 12 https://doi.org/10.1002/ece3.8336 URN:NBN:no-92325 Fulltext https://www.duo.uio.no/bitstream/handle/10852/89722/2/Durant%2BAarvold%2BLangangen%2B%2528EcolEvol%2B2021%2529.pdf Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ CC-BY 2045-7758 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2021 ftoslouniv https://doi.org/10.1002/ece3.8336 2021-12-22T23:33:36Z 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) 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 Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Arctic Barents Sea Gam ENVELOPE(-57.955,-57.955,-61.923,-61.923) Ecology and Evolution 11 23 16993 17004 |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
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) 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. |
format |
Article in Journal/Newspaper |
author |
Durant, Joël Deris, Leana Langangen, Øystein Ole Gahr |
spellingShingle |
Durant, Joël Deris, Leana Langangen, Øystein Ole Gahr Stock collapse and its effect on species interactions: Cod and herring in the Norwegian-Barents Seas system as an example |
author_facet |
Durant, Joël Deris, Leana Langangen, Øystein Ole Gahr |
author_sort |
Durant, Joël |
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 |
publishDate |
2021 |
url |
http://hdl.handle.net/10852/89722 http://urn.nb.no/URN:NBN:no-92325 https://doi.org/10.1002/ece3.8336 |
long_lat |
ENVELOPE(-57.955,-57.955,-61.923,-61.923) |
geographic |
Arctic Barents Sea Gam |
geographic_facet |
Arctic Barents Sea Gam |
genre |
Arctic Barents Sea Gadus morhua |
genre_facet |
Arctic Barents Sea Gadus morhua |
op_source |
2045-7758 |
op_relation |
NFR/244647 NFR/280467 NFR/280468 http://urn.nb.no/URN:NBN:no-92325 Durant, Joël Deris, Leana Langangen, Øystein Ole Gahr . Stock collapse and its effect on species interactions: Cod and herring in the Norwegian-Barents Seas system as an example. Ecology and Evolution. 2021 http://hdl.handle.net/10852/89722 1964578 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Ecology and Evolution&rft.volume=&rft.spage=&rft.date=2021 Ecology and Evolution 11 23 16993 17004 12 https://doi.org/10.1002/ece3.8336 URN:NBN:no-92325 Fulltext https://www.duo.uio.no/bitstream/handle/10852/89722/2/Durant%2BAarvold%2BLangangen%2B%2528EcolEvol%2B2021%2529.pdf |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
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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1766344245207105536 |