The record-warm Barents Sea and 0-group fish response to abnormal conditions
The Barents Sea is a nursery area for many commercially and ecologically important fish stocks, and this whole region is presently subject to rapid climatic change from a cold period in the 1980s to a record warm period in the latest decade, with a peak in 2016. The present study focuses exclusively...
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Online Access: | https://hdl.handle.net/10037/18732 https://doi.org/10.3389/fmars.2020.00338 |
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ftunivtroemsoe:oai:munin.uit.no:10037/18732 2023-05-15T15:38:36+02:00 The record-warm Barents Sea and 0-group fish response to abnormal conditions Eriksen, Elena Bagøien, Espen Strand, Espen Primicerio, Raul Prokhorova, Tatiana Trofimov, Alexander Prokopchuk, Irina 2020-05-25 https://hdl.handle.net/10037/18732 https://doi.org/10.3389/fmars.2020.00338 eng eng Frontiers Media Frontiers in Marine Science Eriksen, Bagøien, Strand, Primicerio, Prokhorova, Trofimov, Prokopchuk. The record-warm Barents Sea and 0-group fish response to abnormal conditions. Frontiers in Marine Science. 2020;7:338:1-19 FRIDAID 1816317 doi:10.3389/fmars.2020.00338 2296-7745 https://hdl.handle.net/10037/18732 openAccess Copyright 2020 The Author(s) VDP::Matematikk og Naturvitenskap: 400 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2020 ftunivtroemsoe https://doi.org/10.3389/fmars.2020.00338 2021-06-25T17:57:32Z The Barents Sea is a nursery area for many commercially and ecologically important fish stocks, and this whole region is presently subject to rapid climatic change from a cold period in the 1980s to a record warm period in the latest decade, with a peak in 2016. The present study focuses exclusively on year 2016, which was characterized by record warm air and seawater and an exceptionally large horizontal coverage of Atlantic waters. Earlier studies have suggested that environmental conditions during the first year of life are the most critical for year class strength and development of fish stocks. We focus on 8 fish species (age 0) and document spatial distributions of their abundances and lengths as well as ambient environmental conditions. Data for most of the Barents Sea obtained from the ecosystem survey (BESS) were used to explore if the record-warm conditions in 2016 limited 0-group fish distributions, abundances and size. Abundances and lengths for the 8 species were related to physical conditions (seawater temperature and salinity) and biological features (biomass of mesozooplankton and biomass of the jellyfish). In 2016, 0-group capelin, haddock, herring and long rough dab were more abundant and all species except long rough dab were larger than the long term mean (1980–2015). Larger individuals and higher abundances were observed mainly in the areas covered by relatively warm water masses apparently holding a sufficient amount of plankton. Most of the 0-group fishes were distributed within their thermal habitats, but with some geographical shift most likely reflecting a shift in the distribution of water masses. A significantly lower abundance of polar cod was observed in 2016, with very few individuals registered within the traditional core area in the south eastern Barents Sea. The increased temperature and low plankton biomass may have limited polar cod distribution and abundance there. A spatial analysis showed that biomass of C. capillata was positively related to abundances of 0-group herring, capelin and cod, indicating that they were inhabiting similar water masses. The high abundances of capelin, haddock, herring and long rough dab, and generally large individuals of most species, may suggest suitable living and feeding conditions in 2016. Article in Journal/Newspaper Barents Sea Mesozooplankton polar cod University of Tromsø: Munin Open Research Archive Barents Sea Frontiers in Marine Science 7 |
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Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 Eriksen, Elena Bagøien, Espen Strand, Espen Primicerio, Raul Prokhorova, Tatiana Trofimov, Alexander Prokopchuk, Irina The record-warm Barents Sea and 0-group fish response to abnormal conditions |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 |
description |
The Barents Sea is a nursery area for many commercially and ecologically important fish stocks, and this whole region is presently subject to rapid climatic change from a cold period in the 1980s to a record warm period in the latest decade, with a peak in 2016. The present study focuses exclusively on year 2016, which was characterized by record warm air and seawater and an exceptionally large horizontal coverage of Atlantic waters. Earlier studies have suggested that environmental conditions during the first year of life are the most critical for year class strength and development of fish stocks. We focus on 8 fish species (age 0) and document spatial distributions of their abundances and lengths as well as ambient environmental conditions. Data for most of the Barents Sea obtained from the ecosystem survey (BESS) were used to explore if the record-warm conditions in 2016 limited 0-group fish distributions, abundances and size. Abundances and lengths for the 8 species were related to physical conditions (seawater temperature and salinity) and biological features (biomass of mesozooplankton and biomass of the jellyfish). In 2016, 0-group capelin, haddock, herring and long rough dab were more abundant and all species except long rough dab were larger than the long term mean (1980–2015). Larger individuals and higher abundances were observed mainly in the areas covered by relatively warm water masses apparently holding a sufficient amount of plankton. Most of the 0-group fishes were distributed within their thermal habitats, but with some geographical shift most likely reflecting a shift in the distribution of water masses. A significantly lower abundance of polar cod was observed in 2016, with very few individuals registered within the traditional core area in the south eastern Barents Sea. The increased temperature and low plankton biomass may have limited polar cod distribution and abundance there. A spatial analysis showed that biomass of C. capillata was positively related to abundances of 0-group herring, capelin and cod, indicating that they were inhabiting similar water masses. The high abundances of capelin, haddock, herring and long rough dab, and generally large individuals of most species, may suggest suitable living and feeding conditions in 2016. |
format |
Article in Journal/Newspaper |
author |
Eriksen, Elena Bagøien, Espen Strand, Espen Primicerio, Raul Prokhorova, Tatiana Trofimov, Alexander Prokopchuk, Irina |
author_facet |
Eriksen, Elena Bagøien, Espen Strand, Espen Primicerio, Raul Prokhorova, Tatiana Trofimov, Alexander Prokopchuk, Irina |
author_sort |
Eriksen, Elena |
title |
The record-warm Barents Sea and 0-group fish response to abnormal conditions |
title_short |
The record-warm Barents Sea and 0-group fish response to abnormal conditions |
title_full |
The record-warm Barents Sea and 0-group fish response to abnormal conditions |
title_fullStr |
The record-warm Barents Sea and 0-group fish response to abnormal conditions |
title_full_unstemmed |
The record-warm Barents Sea and 0-group fish response to abnormal conditions |
title_sort |
record-warm barents sea and 0-group fish response to abnormal conditions |
publisher |
Frontiers Media |
publishDate |
2020 |
url |
https://hdl.handle.net/10037/18732 https://doi.org/10.3389/fmars.2020.00338 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Mesozooplankton polar cod |
genre_facet |
Barents Sea Mesozooplankton polar cod |
op_relation |
Frontiers in Marine Science Eriksen, Bagøien, Strand, Primicerio, Prokhorova, Trofimov, Prokopchuk. The record-warm Barents Sea and 0-group fish response to abnormal conditions. Frontiers in Marine Science. 2020;7:338:1-19 FRIDAID 1816317 doi:10.3389/fmars.2020.00338 2296-7745 https://hdl.handle.net/10037/18732 |
op_rights |
openAccess Copyright 2020 The Author(s) |
op_doi |
https://doi.org/10.3389/fmars.2020.00338 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
_version_ |
1766369726327422976 |