Fine-scale observations of physical and biological environment along a herring feeding migration route
We observed herring horizontal and vertical distribution during feeding migration along a 128 km transect across the Arctic front of the Norwegian and Iceland seas, in early June, in relation to its physical, chemical and biological environment, distribution of prey organisms and pelagic and mesopel...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Online Access: | https://hdl.handle.net/11250/2739582 https://doi.org/10.1016/j.dsr2.2020.104845 |
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ftimr:oai:imr.brage.unit.no:11250/2739582 2024-09-15T18:00:42+00:00 Fine-scale observations of physical and biological environment along a herring feeding migration route Melle, Webjørn Raunsgård Klevjer, Thor A. Strand, Espen Wiebe, Peter H. Slotte, Aril Huse, Geir 2020 application/pdf https://hdl.handle.net/11250/2739582 https://doi.org/10.1016/j.dsr2.2020.104845 eng eng EC/H2020/817669 EC/FP7/264933 Norges forskningsråd: 280546 Deep-Sea Research Part II: Topical Studies in Oceanography. 2020, 180 . urn:issn:0967-0645 https://hdl.handle.net/11250/2739582 https://doi.org/10.1016/j.dsr2.2020.104845 cristin:1901034 19 180 Deep-Sea Research Part II: Topical Studies in Oceanography Peer reviewed Journal article 2020 ftimr https://doi.org/10.1016/j.dsr2.2020.104845 2024-07-31T03:37:25Z We observed herring horizontal and vertical distribution during feeding migration along a 128 km transect across the Arctic front of the Norwegian and Iceland seas, in early June, in relation to its physical, chemical and biological environment, distribution of prey organisms and pelagic and mesopelagic competitors. The Norwegian Spring Spawning herring is one of the largest and economically most important stocks of pelagic fish in the world and understanding what controls its feeding migration is, and has been for centuries, a major research question that also has major implications for management. High resolution ecosystem data were obtained by hull mounted multi-frequency acoustics and a towed platform undulating between 10 and 400 m equipped with multi-frequency acoustics, temperature, salinity and fluorescence sensors, an Optical Plankton Counter and a Video Plankton Recorder. Additional sampling was done by MOCNESS, Macroplankton trawl, and CTD equipped with water bottles for temperature, salinity, nutrients and chlorophyll at discrete stations along the transect. Biological characteristics and stomach content of the herring were obtained from samples at discrete trawl stations. The Arctic front proved to be an important transitional zone in zooplankton biomass, abundance and diversity. Phenology of phyto- and zooplankton also changed across the front, being somewhat delayed on the cold side. The herring were distributed all along the transect showing a shallow distribution on the warm side and both deep and shallow on the cold side, not clearly related to light and time of the day. The herring stomach content was higher on the cold side. There was no significant pattern in average age, weight, or body length of the herring along the transect. The herring were present and fed in the area of the transect during the time when the overwintering generation of Calanus finmarchicus dominated, before the development of the new generation of the year. We suggest that the phenology of C. finmarchicus can be an ... Article in Journal/Newspaper Calanus finmarchicus Iceland Zooplankton Institute for Marine Research: Brage IMR Deep Sea Research Part II: Topical Studies in Oceanography 180 104845 |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
English |
description |
We observed herring horizontal and vertical distribution during feeding migration along a 128 km transect across the Arctic front of the Norwegian and Iceland seas, in early June, in relation to its physical, chemical and biological environment, distribution of prey organisms and pelagic and mesopelagic competitors. The Norwegian Spring Spawning herring is one of the largest and economically most important stocks of pelagic fish in the world and understanding what controls its feeding migration is, and has been for centuries, a major research question that also has major implications for management. High resolution ecosystem data were obtained by hull mounted multi-frequency acoustics and a towed platform undulating between 10 and 400 m equipped with multi-frequency acoustics, temperature, salinity and fluorescence sensors, an Optical Plankton Counter and a Video Plankton Recorder. Additional sampling was done by MOCNESS, Macroplankton trawl, and CTD equipped with water bottles for temperature, salinity, nutrients and chlorophyll at discrete stations along the transect. Biological characteristics and stomach content of the herring were obtained from samples at discrete trawl stations. The Arctic front proved to be an important transitional zone in zooplankton biomass, abundance and diversity. Phenology of phyto- and zooplankton also changed across the front, being somewhat delayed on the cold side. The herring were distributed all along the transect showing a shallow distribution on the warm side and both deep and shallow on the cold side, not clearly related to light and time of the day. The herring stomach content was higher on the cold side. There was no significant pattern in average age, weight, or body length of the herring along the transect. The herring were present and fed in the area of the transect during the time when the overwintering generation of Calanus finmarchicus dominated, before the development of the new generation of the year. We suggest that the phenology of C. finmarchicus can be an ... |
format |
Article in Journal/Newspaper |
author |
Melle, Webjørn Raunsgård Klevjer, Thor A. Strand, Espen Wiebe, Peter H. Slotte, Aril Huse, Geir |
spellingShingle |
Melle, Webjørn Raunsgård Klevjer, Thor A. Strand, Espen Wiebe, Peter H. Slotte, Aril Huse, Geir Fine-scale observations of physical and biological environment along a herring feeding migration route |
author_facet |
Melle, Webjørn Raunsgård Klevjer, Thor A. Strand, Espen Wiebe, Peter H. Slotte, Aril Huse, Geir |
author_sort |
Melle, Webjørn Raunsgård |
title |
Fine-scale observations of physical and biological environment along a herring feeding migration route |
title_short |
Fine-scale observations of physical and biological environment along a herring feeding migration route |
title_full |
Fine-scale observations of physical and biological environment along a herring feeding migration route |
title_fullStr |
Fine-scale observations of physical and biological environment along a herring feeding migration route |
title_full_unstemmed |
Fine-scale observations of physical and biological environment along a herring feeding migration route |
title_sort |
fine-scale observations of physical and biological environment along a herring feeding migration route |
publishDate |
2020 |
url |
https://hdl.handle.net/11250/2739582 https://doi.org/10.1016/j.dsr2.2020.104845 |
genre |
Calanus finmarchicus Iceland Zooplankton |
genre_facet |
Calanus finmarchicus Iceland Zooplankton |
op_source |
19 180 Deep-Sea Research Part II: Topical Studies in Oceanography |
op_relation |
EC/H2020/817669 EC/FP7/264933 Norges forskningsråd: 280546 Deep-Sea Research Part II: Topical Studies in Oceanography. 2020, 180 . urn:issn:0967-0645 https://hdl.handle.net/11250/2739582 https://doi.org/10.1016/j.dsr2.2020.104845 cristin:1901034 |
op_doi |
https://doi.org/10.1016/j.dsr2.2020.104845 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
180 |
container_start_page |
104845 |
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1810437878961930240 |