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 da...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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2009
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Online Access: | http://dx.doi.org/10.1139/f09-022 http://www.nrcresearchpress.com/doi/full-xml/10.1139/F09-022 http://www.nrcresearchpress.com/doi/pdf/10.1139/F09-022 |
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crcansciencepubl:10.1139/f09-022 2023-12-17T10:30:22+01:00 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 http://dx.doi.org/10.1139/f09-022 http://www.nrcresearchpress.com/doi/full-xml/10.1139/F09-022 http://www.nrcresearchpress.com/doi/pdf/10.1139/F09-022 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 66, issue 4, page 633-648 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2009 crcansciencepubl https://doi.org/10.1139/f09-022 2023-11-19T13:39:12Z 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 Canadian Science Publishing (via Crossref) Norway Canadian Journal of Fisheries and Aquatic Sciences 66 4 633 648 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics 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 |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
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 |
publisher |
Canadian Science Publishing |
publishDate |
2009 |
url |
http://dx.doi.org/10.1139/f09-022 http://www.nrcresearchpress.com/doi/full-xml/10.1139/F09-022 http://www.nrcresearchpress.com/doi/pdf/10.1139/F09-022 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 66, issue 4, page 633-648 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
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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1785583322713292800 |