Recruitment of North Sea cod (Gadus morhua) and Norway pout (Trisopterus esmarkii) between 1992 and 2006: the interplay between climate influence and predation
The interplay between temperature-related processes and predation in determining age-1 recruitment strength between 1992 and 2006 was analysed for North Sea cod (Gadus morhua) and Norway pout (Trisopterus esmarkii). For this purpose, an predation impact index (PI) was calculated out of survey data....
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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2009
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ftopenagrar:oai:www.openagrar.de:timport_mods_00029322 2024-09-15T18:07:16+00:00 Recruitment of North Sea cod (Gadus morhua) and Norway pout (Trisopterus esmarkii) between 1992 and 2006: the interplay between climate influence and predation Kempf, Alexander Floeter, Jens Temming, Axel 2009 15 https://doi.org/10.1139/F09-022 https://www.openagrar.de/receive/timport_mods_00029322 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00029322/dk042161.pdf eng eng Canadian journal of fisheries and aquatic sciences -- Journal canadien des sciences halieutiques et aquatiques -- Can. J. Fish. Aquat. Sci. -- J CAN SCI HALIEUTIQUES AQUAT -- 0706-652X -- 1205-7533 -- 7966-2 https://doi.org/DOI:10.1139/F09-022 https://www.openagrar.de/receive/timport_mods_00029322 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00029322/dk042161.pdf only signed in user info:eu-repo/semantics/restrictedAccess article Text article Text doc-type:article 2009 ftopenagrar https://doi.org/10.1139/F09-022 2024-07-08T23:56:24Z The interplay between temperature-related processes and predation in determining age-1 recruitment strength between 1992 and 2006 was analysed for North Sea cod (Gadus morhua) and Norway pout (Trisopterus esmarkii). For this purpose, an predation impact index (PI) was calculated out of survey data. PI was assumed to depend on the abundance of the predators and on the spatial overlap between predator and prey populations. Generalized additive models (GAMs) were created with spawning stock biomass (SSB) and sea surface temperature (SST) in the respective spawning and nursery areas and PI as explaining variables. SSB had no significant impact on recruitment during this time period for both species. SSTs during spring and PI explained the interannual variability in recruitment strength to a large extent (88% of the total variance for cod and 68% for Norway pout). The SST during spring determined the overall level of recruitment. At SSTs above a certain level, however, the effect on recruitment was no longer significant. In these temperature ranges, predation was the dominant effect. Therefore, the fate of North Sea cod and Norway pout stocks under global-warming conditions will be strongly influenced by the status of the North Sea food web. Article in Journal/Newspaper Gadus morhua OpenAgrar (OA) Canadian Journal of Fisheries and Aquatic Sciences 66 4 633 648 |
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OpenAgrar (OA) |
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ftopenagrar |
language |
English |
topic |
article Text |
spellingShingle |
article Text Kempf, Alexander Floeter, Jens Temming, Axel Recruitment of North Sea cod (Gadus morhua) and Norway pout (Trisopterus esmarkii) between 1992 and 2006: the interplay between climate influence and predation |
topic_facet |
article Text |
description |
The interplay between temperature-related processes and predation in determining age-1 recruitment strength between 1992 and 2006 was analysed for North Sea cod (Gadus morhua) and Norway pout (Trisopterus esmarkii). For this purpose, an predation impact index (PI) was calculated out of survey data. PI was assumed to depend on the abundance of the predators and on the spatial overlap between predator and prey populations. Generalized additive models (GAMs) were created with spawning stock biomass (SSB) and sea surface temperature (SST) in the respective spawning and nursery areas and PI as explaining variables. SSB had no significant impact on recruitment during this time period for both species. SSTs during spring and PI explained the interannual variability in recruitment strength to a large extent (88% of the total variance for cod and 68% for Norway pout). The SST during spring determined the overall level of recruitment. At SSTs above a certain level, however, the effect on recruitment was no longer significant. In these temperature ranges, predation was the dominant effect. Therefore, the fate of North Sea cod and Norway pout stocks under global-warming conditions will be strongly influenced by the status of the North Sea food web. |
format |
Article in Journal/Newspaper |
author |
Kempf, Alexander Floeter, Jens Temming, Axel |
author_facet |
Kempf, Alexander Floeter, Jens Temming, Axel |
author_sort |
Kempf, Alexander |
title |
Recruitment of North Sea cod (Gadus morhua) and Norway pout (Trisopterus esmarkii) between 1992 and 2006: the interplay between climate influence and predation |
title_short |
Recruitment of North Sea cod (Gadus morhua) and Norway pout (Trisopterus esmarkii) between 1992 and 2006: the interplay between climate influence and predation |
title_full |
Recruitment of North Sea cod (Gadus morhua) and Norway pout (Trisopterus esmarkii) between 1992 and 2006: the interplay between climate influence and predation |
title_fullStr |
Recruitment of North Sea cod (Gadus morhua) and Norway pout (Trisopterus esmarkii) between 1992 and 2006: the interplay between climate influence and predation |
title_full_unstemmed |
Recruitment of North Sea cod (Gadus morhua) and Norway pout (Trisopterus esmarkii) between 1992 and 2006: the interplay between climate influence and predation |
title_sort |
recruitment of north sea cod (gadus morhua) and norway pout (trisopterus esmarkii) between 1992 and 2006: the interplay between climate influence and predation |
publishDate |
2009 |
url |
https://doi.org/10.1139/F09-022 https://www.openagrar.de/receive/timport_mods_00029322 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00029322/dk042161.pdf |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_relation |
Canadian journal of fisheries and aquatic sciences -- Journal canadien des sciences halieutiques et aquatiques -- Can. J. Fish. Aquat. Sci. -- J CAN SCI HALIEUTIQUES AQUAT -- 0706-652X -- 1205-7533 -- 7966-2 https://doi.org/DOI:10.1139/F09-022 https://www.openagrar.de/receive/timport_mods_00029322 https://www.openagrar.de/servlets/MCRFileNodeServlet/timport_derivate_00029322/dk042161.pdf |
op_rights |
only signed in user info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1139/F09-022 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
66 |
container_issue |
4 |
container_start_page |
633 |
op_container_end_page |
648 |
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1810444644460265472 |