Grey gurnard ( Eutrigla gurnadus ) in the North Sea: an emerging key predator?
Grey gurnard (Eutrigla gurnadus) is a widely distributed demersal species in the North Sea that has been ranked frequently among the 10 dominant species. Since the late 1980s, grey gurnard catch rates in the international bottom trawl surveys showed a pronounced increase and it was included as an &q...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Canadian Science Publishing
2005
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1139/f05-108 http://www.nrcresearchpress.com/doi/pdf/10.1139/f05-108 |
id |
crcansciencepubl:10.1139/f05-108 |
---|---|
record_format |
openpolar |
spelling |
crcansciencepubl:10.1139/f05-108 2023-12-17T10:27:04+01:00 Grey gurnard ( Eutrigla gurnadus ) in the North Sea: an emerging key predator? Floeter, Jens Kempf, Alexander Vinther, Morten Schrum, Corinna Temming, Axel 2005 http://dx.doi.org/10.1139/f05-108 http://www.nrcresearchpress.com/doi/pdf/10.1139/f05-108 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 62, issue 8, page 1853-1864 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2005 crcansciencepubl https://doi.org/10.1139/f05-108 2023-11-19T13:39:11Z Grey gurnard (Eutrigla gurnadus) is a widely distributed demersal species in the North Sea that has been ranked frequently among the 10 dominant species. Since the late 1980s, grey gurnard catch rates in the international bottom trawl surveys showed a pronounced increase and it was included as an "other predator" in the North Sea multispecies virtual population analysis (MSVPA) in 1997. The MSVPA results estimated grey gurnard to be responsible for approximately 60% of the total predation mortality on age-0 Atlantic cod (Gadus morhua). Long-term MSVPA predictions led to the extinction of North Sea cod. As a possible technical reason, the Holling type II functional response implemented in the model was discussed. In the current analysis, it was demonstrated that the Holling type II functional response was not responsible for the extinction of cod in the model, which was rather a true effect of high grey gurnard predation. Further, it was shown that grey gurnard predation had a significant top-down effect on whiting (Merlangius merlangus) and potentially also on cod recruitment, which was linked to the spatial distribution of the three species. Eventually, the implications of the results for North Sea cod stock recovery plans were discussed. Article in Journal/Newspaper atlantic cod Gadus morhua Canadian Science Publishing (via Crossref) Canadian Journal of Fisheries and Aquatic Sciences 62 8 1853 1864 |
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 Floeter, Jens Kempf, Alexander Vinther, Morten Schrum, Corinna Temming, Axel Grey gurnard ( Eutrigla gurnadus ) in the North Sea: an emerging key predator? |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Grey gurnard (Eutrigla gurnadus) is a widely distributed demersal species in the North Sea that has been ranked frequently among the 10 dominant species. Since the late 1980s, grey gurnard catch rates in the international bottom trawl surveys showed a pronounced increase and it was included as an "other predator" in the North Sea multispecies virtual population analysis (MSVPA) in 1997. The MSVPA results estimated grey gurnard to be responsible for approximately 60% of the total predation mortality on age-0 Atlantic cod (Gadus morhua). Long-term MSVPA predictions led to the extinction of North Sea cod. As a possible technical reason, the Holling type II functional response implemented in the model was discussed. In the current analysis, it was demonstrated that the Holling type II functional response was not responsible for the extinction of cod in the model, which was rather a true effect of high grey gurnard predation. Further, it was shown that grey gurnard predation had a significant top-down effect on whiting (Merlangius merlangus) and potentially also on cod recruitment, which was linked to the spatial distribution of the three species. Eventually, the implications of the results for North Sea cod stock recovery plans were discussed. |
format |
Article in Journal/Newspaper |
author |
Floeter, Jens Kempf, Alexander Vinther, Morten Schrum, Corinna Temming, Axel |
author_facet |
Floeter, Jens Kempf, Alexander Vinther, Morten Schrum, Corinna Temming, Axel |
author_sort |
Floeter, Jens |
title |
Grey gurnard ( Eutrigla gurnadus ) in the North Sea: an emerging key predator? |
title_short |
Grey gurnard ( Eutrigla gurnadus ) in the North Sea: an emerging key predator? |
title_full |
Grey gurnard ( Eutrigla gurnadus ) in the North Sea: an emerging key predator? |
title_fullStr |
Grey gurnard ( Eutrigla gurnadus ) in the North Sea: an emerging key predator? |
title_full_unstemmed |
Grey gurnard ( Eutrigla gurnadus ) in the North Sea: an emerging key predator? |
title_sort |
grey gurnard ( eutrigla gurnadus ) in the north sea: an emerging key predator? |
publisher |
Canadian Science Publishing |
publishDate |
2005 |
url |
http://dx.doi.org/10.1139/f05-108 http://www.nrcresearchpress.com/doi/pdf/10.1139/f05-108 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 62, issue 8, page 1853-1864 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f05-108 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
62 |
container_issue |
8 |
container_start_page |
1853 |
op_container_end_page |
1864 |
_version_ |
1785578853536628736 |