Jellyfish summer distribution, diversity and impact on fish farms in a Nordic fjord
Jellyfish can cause high mortality of farmed fish and hence significant economic losses for the aquaculture industry. Despite their socio-economic importance, distribution and diversity data on gelatinous plankton are scarce from northern Norwegian fjords and other Nordic systems. Intense blooms of...
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ftunivbergen:oai:bora.uib.no:1956/17365 2023-05-15T15:11:08+02:00 Jellyfish summer distribution, diversity and impact on fish farms in a Nordic fjord Halsband, Claudia Majaneva, Sanna Kristiina Hosia, Aino Emaus, Per Gaardsted, Frank Zhou, Qin Nøst, Ole Anders Renaud, Paul Eric 2018-02-05T09:43:10Z application/pdf https://hdl.handle.net/1956/17365 https://doi.org/10.3354/meps12274 eng eng Inter-Research http://www.int-res.com/articles/theme/AdvanceView/M12274_Halsband_JB5.pdf Norges forskningsråd: 548990 urn:issn:0171-8630 urn:issn:1616-1599 https://hdl.handle.net/1956/17365 https://doi.org/10.3354/meps12274 cristin:1558068 Attribution CC BY http://creativecommons.org/licenses/by/4.0 Copyright 2017 The Author(s) Marine Ecology Progress Series Aquaculture Arctic Beroe spp Dipleurosoma typicum Jellyfish bloom Norway Peer reviewed Journal article 2018 ftunivbergen https://doi.org/10.3354/meps12274 2023-03-14T17:43:00Z Jellyfish can cause high mortality of farmed fish and hence significant economic losses for the aquaculture industry. Despite their socio-economic importance, distribution and diversity data on gelatinous plankton are scarce from northern Norwegian fjords and other Nordic systems. Intense blooms of jellyfish have repeatedly been observed in Ryggefjord, Finnmark (Norway), sometimes concurrent with severe health problems of salmon. In the present study, the jellyfish community of this fjord was studied in summer 2015. In July, at least 13 species were identified using a combination of morphological and molecular techniques. High densities of small Beroe spp. and ctenophore larvae in cydippid stage dominated the surface waters. Adult Beroe cucumis were also present. Molecular identification revealed the presence of juvenile Euphysa tentaculata, as well as 2 species each of Clytia and Obelia. Obelia longissima was identified from both its pelagic (medusa) and benthic (polyp) stages, indicating that some local populations can complete their entire life cycle in the fjord. Abundances were significantly different between inner and outer parts of the fjord, and in relation to the prevailing wind direction. A dense bloom of the hydrozoan Dipleurosoma typicum in September coincided with high mortalities of farmed fish, suggesting a causal relationship. We conclude that the jellyfish assemblage in Ryggefjord is dynamic on short time scales and structured by both oceanographic conditions and local reproduction. A better understanding of seasonal population development and the relationships between hydrography, abundance and species composition is required to develop mitigation strategies for aquaculture operations publishedVersion Article in Journal/Newspaper Arctic Finnmark Finnmark University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Medusa ENVELOPE(157.417,157.417,-79.633,-79.633) Norway Marine Ecology Progress Series 591 267 279 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Aquaculture Arctic Beroe spp Dipleurosoma typicum Jellyfish bloom Norway |
spellingShingle |
Aquaculture Arctic Beroe spp Dipleurosoma typicum Jellyfish bloom Norway Halsband, Claudia Majaneva, Sanna Kristiina Hosia, Aino Emaus, Per Gaardsted, Frank Zhou, Qin Nøst, Ole Anders Renaud, Paul Eric Jellyfish summer distribution, diversity and impact on fish farms in a Nordic fjord |
topic_facet |
Aquaculture Arctic Beroe spp Dipleurosoma typicum Jellyfish bloom Norway |
description |
Jellyfish can cause high mortality of farmed fish and hence significant economic losses for the aquaculture industry. Despite their socio-economic importance, distribution and diversity data on gelatinous plankton are scarce from northern Norwegian fjords and other Nordic systems. Intense blooms of jellyfish have repeatedly been observed in Ryggefjord, Finnmark (Norway), sometimes concurrent with severe health problems of salmon. In the present study, the jellyfish community of this fjord was studied in summer 2015. In July, at least 13 species were identified using a combination of morphological and molecular techniques. High densities of small Beroe spp. and ctenophore larvae in cydippid stage dominated the surface waters. Adult Beroe cucumis were also present. Molecular identification revealed the presence of juvenile Euphysa tentaculata, as well as 2 species each of Clytia and Obelia. Obelia longissima was identified from both its pelagic (medusa) and benthic (polyp) stages, indicating that some local populations can complete their entire life cycle in the fjord. Abundances were significantly different between inner and outer parts of the fjord, and in relation to the prevailing wind direction. A dense bloom of the hydrozoan Dipleurosoma typicum in September coincided with high mortalities of farmed fish, suggesting a causal relationship. We conclude that the jellyfish assemblage in Ryggefjord is dynamic on short time scales and structured by both oceanographic conditions and local reproduction. A better understanding of seasonal population development and the relationships between hydrography, abundance and species composition is required to develop mitigation strategies for aquaculture operations publishedVersion |
format |
Article in Journal/Newspaper |
author |
Halsband, Claudia Majaneva, Sanna Kristiina Hosia, Aino Emaus, Per Gaardsted, Frank Zhou, Qin Nøst, Ole Anders Renaud, Paul Eric |
author_facet |
Halsband, Claudia Majaneva, Sanna Kristiina Hosia, Aino Emaus, Per Gaardsted, Frank Zhou, Qin Nøst, Ole Anders Renaud, Paul Eric |
author_sort |
Halsband, Claudia |
title |
Jellyfish summer distribution, diversity and impact on fish farms in a Nordic fjord |
title_short |
Jellyfish summer distribution, diversity and impact on fish farms in a Nordic fjord |
title_full |
Jellyfish summer distribution, diversity and impact on fish farms in a Nordic fjord |
title_fullStr |
Jellyfish summer distribution, diversity and impact on fish farms in a Nordic fjord |
title_full_unstemmed |
Jellyfish summer distribution, diversity and impact on fish farms in a Nordic fjord |
title_sort |
jellyfish summer distribution, diversity and impact on fish farms in a nordic fjord |
publisher |
Inter-Research |
publishDate |
2018 |
url |
https://hdl.handle.net/1956/17365 https://doi.org/10.3354/meps12274 |
long_lat |
ENVELOPE(157.417,157.417,-79.633,-79.633) |
geographic |
Arctic Medusa Norway |
geographic_facet |
Arctic Medusa Norway |
genre |
Arctic Finnmark Finnmark |
genre_facet |
Arctic Finnmark Finnmark |
op_source |
Marine Ecology Progress Series |
op_relation |
http://www.int-res.com/articles/theme/AdvanceView/M12274_Halsband_JB5.pdf Norges forskningsråd: 548990 urn:issn:0171-8630 urn:issn:1616-1599 https://hdl.handle.net/1956/17365 https://doi.org/10.3354/meps12274 cristin:1558068 |
op_rights |
Attribution CC BY http://creativecommons.org/licenses/by/4.0 Copyright 2017 The Author(s) |
op_doi |
https://doi.org/10.3354/meps12274 |
container_title |
Marine Ecology Progress Series |
container_volume |
591 |
container_start_page |
267 |
op_container_end_page |
279 |
_version_ |
1766342043807776768 |