Biomass of scyphozoan jellyfish, and its spatial association with 0-group fish in the Barents Sea.
An 0-group fish survey is conducted annually in the Barents Sea in order to estimate fish population abundance. Data on jellyfish by-catch have been recorded since 1980, although this dataset has never been analysed. In recent years, however, the ecological importance of jellyfish medusae has become...
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ftdoajarticles:oai:doaj.org/article:a17698cb441b4c36881ce41dadf3eab7 2023-05-15T15:38:10+02:00 Biomass of scyphozoan jellyfish, and its spatial association with 0-group fish in the Barents Sea. Elena Eriksen Dmitry Prozorkevich Aleksandr Trofimov Daniel Howell 2012-01-01T00:00:00Z https://doi.org/10.1371/journal.pone.0033050 https://doaj.org/article/a17698cb441b4c36881ce41dadf3eab7 EN eng Public Library of Science (PLoS) http://europepmc.org/articles/PMC3310840?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0033050 https://doaj.org/article/a17698cb441b4c36881ce41dadf3eab7 PLoS ONE, Vol 7, Iss 3, p e33050 (2012) Medicine R Science Q article 2012 ftdoajarticles https://doi.org/10.1371/journal.pone.0033050 2022-12-31T06:36:38Z An 0-group fish survey is conducted annually in the Barents Sea in order to estimate fish population abundance. Data on jellyfish by-catch have been recorded since 1980, although this dataset has never been analysed. In recent years, however, the ecological importance of jellyfish medusae has become widely recognized. In this paper the biomass of jellyfish (medusae) in 0-60 m depths is calculated for the period 1980-2010. During this period the climate changed from cold to warm, and changes in zooplankton and fish distribution and abundance were observed. This paper discusses the less well known ecosystem component; jellyfish medusae within the Phylum Cnidaria, and their spatial and temporal variation. The long term average was ca. 9×10⁸ kg, with some years showing biomasses in excess of 5×10⁹ kg. The biomasses were low during 1980s, increased during 1990s, and were highest in early 2000s with a subsequent decline. The bulk of the jellyfish were observed in the central parts of the Barents Sea, which is a core area for most 0-group fishes. Jellyfish were associated with haddock in the western area, with haddock and herring in the central and coastal area, and with capelin in the northern area of the Barents Sea. The jellyfish were present in the temperature interval 1°C<T<10°C, with peak densities at ca. 5.5°C, and the greatest proportion of the jellyfish occurring between 4.0-7.0°C. It seems that the ongoing warming trend may be favourable for Barents Sea jellyfish medusae; however their biomass has showed a recent moderate decline during years with record high temperatures in the Barents Sea. Jellyfish are undoubtedly an important component of the Barents Sea ecosystem, and the data presented here represent the best summary of jellyfish biomass and distribution yet published for the region. Article in Journal/Newspaper Barents Sea Directory of Open Access Journals: DOAJ Articles Barents Sea PLoS ONE 7 3 e33050 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
spellingShingle |
Medicine R Science Q Elena Eriksen Dmitry Prozorkevich Aleksandr Trofimov Daniel Howell Biomass of scyphozoan jellyfish, and its spatial association with 0-group fish in the Barents Sea. |
topic_facet |
Medicine R Science Q |
description |
An 0-group fish survey is conducted annually in the Barents Sea in order to estimate fish population abundance. Data on jellyfish by-catch have been recorded since 1980, although this dataset has never been analysed. In recent years, however, the ecological importance of jellyfish medusae has become widely recognized. In this paper the biomass of jellyfish (medusae) in 0-60 m depths is calculated for the period 1980-2010. During this period the climate changed from cold to warm, and changes in zooplankton and fish distribution and abundance were observed. This paper discusses the less well known ecosystem component; jellyfish medusae within the Phylum Cnidaria, and their spatial and temporal variation. The long term average was ca. 9×10⁸ kg, with some years showing biomasses in excess of 5×10⁹ kg. The biomasses were low during 1980s, increased during 1990s, and were highest in early 2000s with a subsequent decline. The bulk of the jellyfish were observed in the central parts of the Barents Sea, which is a core area for most 0-group fishes. Jellyfish were associated with haddock in the western area, with haddock and herring in the central and coastal area, and with capelin in the northern area of the Barents Sea. The jellyfish were present in the temperature interval 1°C<T<10°C, with peak densities at ca. 5.5°C, and the greatest proportion of the jellyfish occurring between 4.0-7.0°C. It seems that the ongoing warming trend may be favourable for Barents Sea jellyfish medusae; however their biomass has showed a recent moderate decline during years with record high temperatures in the Barents Sea. Jellyfish are undoubtedly an important component of the Barents Sea ecosystem, and the data presented here represent the best summary of jellyfish biomass and distribution yet published for the region. |
format |
Article in Journal/Newspaper |
author |
Elena Eriksen Dmitry Prozorkevich Aleksandr Trofimov Daniel Howell |
author_facet |
Elena Eriksen Dmitry Prozorkevich Aleksandr Trofimov Daniel Howell |
author_sort |
Elena Eriksen |
title |
Biomass of scyphozoan jellyfish, and its spatial association with 0-group fish in the Barents Sea. |
title_short |
Biomass of scyphozoan jellyfish, and its spatial association with 0-group fish in the Barents Sea. |
title_full |
Biomass of scyphozoan jellyfish, and its spatial association with 0-group fish in the Barents Sea. |
title_fullStr |
Biomass of scyphozoan jellyfish, and its spatial association with 0-group fish in the Barents Sea. |
title_full_unstemmed |
Biomass of scyphozoan jellyfish, and its spatial association with 0-group fish in the Barents Sea. |
title_sort |
biomass of scyphozoan jellyfish, and its spatial association with 0-group fish in the barents sea. |
publisher |
Public Library of Science (PLoS) |
publishDate |
2012 |
url |
https://doi.org/10.1371/journal.pone.0033050 https://doaj.org/article/a17698cb441b4c36881ce41dadf3eab7 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea |
genre_facet |
Barents Sea |
op_source |
PLoS ONE, Vol 7, Iss 3, p e33050 (2012) |
op_relation |
http://europepmc.org/articles/PMC3310840?pdf=render https://doaj.org/toc/1932-6203 1932-6203 doi:10.1371/journal.pone.0033050 https://doaj.org/article/a17698cb441b4c36881ce41dadf3eab7 |
op_doi |
https://doi.org/10.1371/journal.pone.0033050 |
container_title |
PLoS ONE |
container_volume |
7 |
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3 |
container_start_page |
e33050 |
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