Effect of bottom type on catch rates of North Sea cod (Gadus morhua) in surveys with commercial fishing vessels
Seven surveys with commercial fishing vessels were conducted during a collaborative fishermen-scientist project on the distribution of cod in the north-eastern North Sea between June 2006 and June 2008. A flyshooter, a trawler and a gillnetter participated in this study. In general, catch rates were...
Published in: | Fisheries Research |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2009
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Online Access: | https://orbit.dtu.dk/en/publications/f6bbadde-bfab-45f5-beb5-8a6475fc725c https://doi.org/10.1016/j.fishres.2008.11.010 |
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ftdtupubl:oai:pure.atira.dk:publications/f6bbadde-bfab-45f5-beb5-8a6475fc725c 2024-09-15T18:07:19+00:00 Effect of bottom type on catch rates of North Sea cod (Gadus morhua) in surveys with commercial fishing vessels Wieland, Kai Pedersen, Eva Maria Olesen, Hans Jakob Beyer, Jan 2009 https://orbit.dtu.dk/en/publications/f6bbadde-bfab-45f5-beb5-8a6475fc725c https://doi.org/10.1016/j.fishres.2008.11.010 eng eng https://orbit.dtu.dk/en/publications/f6bbadde-bfab-45f5-beb5-8a6475fc725c info:eu-repo/semantics/closedAccess Wieland , K , Pedersen , E M , Olesen , H J & Beyer , J 2009 , ' Effect of bottom type on catch rates of North Sea cod (Gadus morhua) in surveys with commercial fishing vessels ' , Fisheries Research , vol. 96 , no. 2-3 , pp. 244-251 . https://doi.org/10.1016/j.fishres.2008.11.010 Habitat preference Commercial CPUE Bottom type North Sea Cod article 2009 ftdtupubl https://doi.org/10.1016/j.fishres.2008.11.010 2024-07-01T23:52:53Z Seven surveys with commercial fishing vessels were conducted during a collaborative fishermen-scientist project on the distribution of cod in the north-eastern North Sea between June 2006 and June 2008. A flyshooter, a trawler and a gillnetter participated in this study. In general, catch rates were substantially higher on gravel or stone bottom and at ship wrecks than on sand bottom. The difference in the catch rates between the two bottom categories at paired stations within a short distance was highly significant for all the three fishing methods. Similarly, average CPUE for most surveys was several times higher on rough than on smooth bottom. These differences were highly significant for early autumn surveys conducted with the flyshooter and trawler and all gillnet surveys, the summer surveys for the flyshooter and the gillnetter, but not for the winter surveys with the trawler and the flyshooter. The latter suggest that bottom type preference may change with season, e.g. with respect to spawning migrations in winter and in relation with changes in the availability of food during spring and summer. Article in Journal/Newspaper Gadus morhua Technical University of Denmark: DTU Orbit Fisheries Research 96 2-3 244 251 |
institution |
Open Polar |
collection |
Technical University of Denmark: DTU Orbit |
op_collection_id |
ftdtupubl |
language |
English |
topic |
Habitat preference Commercial CPUE Bottom type North Sea Cod |
spellingShingle |
Habitat preference Commercial CPUE Bottom type North Sea Cod Wieland, Kai Pedersen, Eva Maria Olesen, Hans Jakob Beyer, Jan Effect of bottom type on catch rates of North Sea cod (Gadus morhua) in surveys with commercial fishing vessels |
topic_facet |
Habitat preference Commercial CPUE Bottom type North Sea Cod |
description |
Seven surveys with commercial fishing vessels were conducted during a collaborative fishermen-scientist project on the distribution of cod in the north-eastern North Sea between June 2006 and June 2008. A flyshooter, a trawler and a gillnetter participated in this study. In general, catch rates were substantially higher on gravel or stone bottom and at ship wrecks than on sand bottom. The difference in the catch rates between the two bottom categories at paired stations within a short distance was highly significant for all the three fishing methods. Similarly, average CPUE for most surveys was several times higher on rough than on smooth bottom. These differences were highly significant for early autumn surveys conducted with the flyshooter and trawler and all gillnet surveys, the summer surveys for the flyshooter and the gillnetter, but not for the winter surveys with the trawler and the flyshooter. The latter suggest that bottom type preference may change with season, e.g. with respect to spawning migrations in winter and in relation with changes in the availability of food during spring and summer. |
format |
Article in Journal/Newspaper |
author |
Wieland, Kai Pedersen, Eva Maria Olesen, Hans Jakob Beyer, Jan |
author_facet |
Wieland, Kai Pedersen, Eva Maria Olesen, Hans Jakob Beyer, Jan |
author_sort |
Wieland, Kai |
title |
Effect of bottom type on catch rates of North Sea cod (Gadus morhua) in surveys with commercial fishing vessels |
title_short |
Effect of bottom type on catch rates of North Sea cod (Gadus morhua) in surveys with commercial fishing vessels |
title_full |
Effect of bottom type on catch rates of North Sea cod (Gadus morhua) in surveys with commercial fishing vessels |
title_fullStr |
Effect of bottom type on catch rates of North Sea cod (Gadus morhua) in surveys with commercial fishing vessels |
title_full_unstemmed |
Effect of bottom type on catch rates of North Sea cod (Gadus morhua) in surveys with commercial fishing vessels |
title_sort |
effect of bottom type on catch rates of north sea cod (gadus morhua) in surveys with commercial fishing vessels |
publishDate |
2009 |
url |
https://orbit.dtu.dk/en/publications/f6bbadde-bfab-45f5-beb5-8a6475fc725c https://doi.org/10.1016/j.fishres.2008.11.010 |
genre |
Gadus morhua |
genre_facet |
Gadus morhua |
op_source |
Wieland , K , Pedersen , E M , Olesen , H J & Beyer , J 2009 , ' Effect of bottom type on catch rates of North Sea cod (Gadus morhua) in surveys with commercial fishing vessels ' , Fisheries Research , vol. 96 , no. 2-3 , pp. 244-251 . https://doi.org/10.1016/j.fishres.2008.11.010 |
op_relation |
https://orbit.dtu.dk/en/publications/f6bbadde-bfab-45f5-beb5-8a6475fc725c |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.fishres.2008.11.010 |
container_title |
Fisheries Research |
container_volume |
96 |
container_issue |
2-3 |
container_start_page |
244 |
op_container_end_page |
251 |
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1810444696530452480 |