Coincident mass occurrence of gelatinous zooplankton in Northern Norway
Source at https://doi.org/10.3389/fmars.2018.00158 . Accepted manuscript version, licensed CC BY-NC-ND 4.0. In autumn 2015, several sources reported observations of large amounts of gelatinous material in a large north Norwegian fjord system, either caught when trawling for other organisms or foulin...
Published in: | Frontiers in Marine Science |
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Main Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Frontiers Media
2018
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Subjects: | |
Online Access: | https://hdl.handle.net/10037/13017 https://doi.org/10.3389/fmars.2018.00158 |
id |
ftunivtroemsoe:oai:munin.uit.no:10037/13017 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 Jellyfish bloom Genetics Acoustics Nanomia North Norwegian fjords Gelatinous zooplankton |
spellingShingle |
VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 Jellyfish bloom Genetics Acoustics Nanomia North Norwegian fjords Gelatinous zooplankton Knutsen, Tor Hosia, Aino Falkenhaug, Tone Skern-Mauritzen, Rasmus Wiebe, Peter H. Larsen, Roger B. Aglen, Asgeir Coincident mass occurrence of gelatinous zooplankton in Northern Norway |
topic_facet |
VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 Jellyfish bloom Genetics Acoustics Nanomia North Norwegian fjords Gelatinous zooplankton |
description |
Source at https://doi.org/10.3389/fmars.2018.00158 . Accepted manuscript version, licensed CC BY-NC-ND 4.0. In autumn 2015, several sources reported observations of large amounts of gelatinous material in a large north Norwegian fjord system, either caught when trawling for other organisms or fouling fishing gear. The responsible organism was identified as a physonect siphonophore, Nanomia cara, while a ctenophore, Beroe cucumis, and a hydromedusa, Modeeria rotunda, were also registered in high abundances on a couple of occasions. To document the phenomena, we have compiled a variety of data from concurrent fisheries surveys and local fishermen, including physical samples, trawl catch, and acoustic data, photo and video evidence, and environmental data. Because of the gas-filled pneumatophore, characteristic for these types of siphonophores, acoustics provided detailed and unique insight to the horizontal and vertical distribution and potential abundances (~0.2–20 colonies·m−3) of N. cara with the highest concentrations observed in the near bottom region at ~320 m depth in the study area. This suggests that these animals were retained and accumulated in the deep basins of the fjord system possibly blooming here because of favorable environmental conditions and potentially higher prey availability compared to the shallower shelf areas to the north. Few cues as to the origin and onset of the bloom were found, but it may have originated from locally resident siphonophores. The characteristics of the deep-water masses in the fjord basins were different compared to the deep water outside the fjord system, suggesting no recent deep-water import to the fjords. However, water-masses containing siphonophores (not necessarily very abundant), may have been additionally introduced to the fjords at intermediate depths, with the animals subsequently trapped in the deeper fjord basins. The simultaneous observations of abundant siphonophores, hydromedusae, and ctenophores in the Lyngen-Kvænangen fjord system are intriguing, but difficult to provide a unified explanation for, as the organisms differ in their biology and ecology. Nanomia and Beroe spp. are holopelagic, while M. rotunda has a benthic hydroid stage. The species also have different trophic ecologies and dietary preferences. Only by combining information from acoustics, trawling, genetics, and local fishermen, were the identity, abundance, and the vertical and horizontal distribution of the physonect siphonophore, N. cara, established. |
format |
Article in Journal/Newspaper |
author |
Knutsen, Tor Hosia, Aino Falkenhaug, Tone Skern-Mauritzen, Rasmus Wiebe, Peter H. Larsen, Roger B. Aglen, Asgeir |
author_facet |
Knutsen, Tor Hosia, Aino Falkenhaug, Tone Skern-Mauritzen, Rasmus Wiebe, Peter H. Larsen, Roger B. Aglen, Asgeir |
author_sort |
Knutsen, Tor |
title |
Coincident mass occurrence of gelatinous zooplankton in Northern Norway |
title_short |
Coincident mass occurrence of gelatinous zooplankton in Northern Norway |
title_full |
Coincident mass occurrence of gelatinous zooplankton in Northern Norway |
title_fullStr |
Coincident mass occurrence of gelatinous zooplankton in Northern Norway |
title_full_unstemmed |
Coincident mass occurrence of gelatinous zooplankton in Northern Norway |
title_sort |
coincident mass occurrence of gelatinous zooplankton in northern norway |
publisher |
Frontiers Media |
publishDate |
2018 |
url |
https://hdl.handle.net/10037/13017 https://doi.org/10.3389/fmars.2018.00158 |
long_lat |
ENVELOPE(161.100,161.100,-82.750,-82.750) ENVELOPE(21.726,21.726,69.931,69.931) ENVELOPE(161.567,161.567,-78.017,-78.017) |
geographic |
Cara Kvænangen Norway Rotunda |
geographic_facet |
Cara Kvænangen Norway Rotunda |
genre |
Arctic Kvænangen Northern Norway Lyngen |
genre_facet |
Arctic Kvænangen Northern Norway Lyngen |
op_relation |
Frontiers in Marine Science info:eu-repo/grantAgreement/RCN/SIPHINIFES/228896/Norway/The Arctic Ocean Ecosystem - Polhavets økosystem// info:eu-repo/grantAgreement/RCN/UNI-MUSEER/248799/Norway/ForBio - The Research School in Biosystematics// Knutsen, T., Hosia, A., Falkenhaug, T., Skern-Mauritzen, R., Wiebe, P.H., Larsen, R.B.L., . Berg, E. (2018). Coincident mass occurrence of gelatinous zooplankton in Northern Norway. Frontiers in Marine Science. 5(158), 1-26. https://doi.org/10.3389/fmars.2018.00158 FRIDAID 1592614 doi:10.3389/fmars.2018.00158 2296-7745 https://hdl.handle.net/10037/13017 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.3389/fmars.2018.00158 |
container_title |
Frontiers in Marine Science |
container_volume |
5 |
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1766301364458094592 |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/13017 2023-05-15T14:27:34+02:00 Coincident mass occurrence of gelatinous zooplankton in Northern Norway Knutsen, Tor Hosia, Aino Falkenhaug, Tone Skern-Mauritzen, Rasmus Wiebe, Peter H. Larsen, Roger B. Aglen, Asgeir 2018-05-23 https://hdl.handle.net/10037/13017 https://doi.org/10.3389/fmars.2018.00158 eng eng Frontiers Media Frontiers in Marine Science info:eu-repo/grantAgreement/RCN/SIPHINIFES/228896/Norway/The Arctic Ocean Ecosystem - Polhavets økosystem// info:eu-repo/grantAgreement/RCN/UNI-MUSEER/248799/Norway/ForBio - The Research School in Biosystematics// Knutsen, T., Hosia, A., Falkenhaug, T., Skern-Mauritzen, R., Wiebe, P.H., Larsen, R.B.L., . Berg, E. (2018). Coincident mass occurrence of gelatinous zooplankton in Northern Norway. Frontiers in Marine Science. 5(158), 1-26. https://doi.org/10.3389/fmars.2018.00158 FRIDAID 1592614 doi:10.3389/fmars.2018.00158 2296-7745 https://hdl.handle.net/10037/13017 openAccess VDP::Landbruks- og Fiskerifag: 900::Fiskerifag: 920 VDP::Agriculture and fishery disciplines: 900::Fisheries science: 920 Jellyfish bloom Genetics Acoustics Nanomia North Norwegian fjords Gelatinous zooplankton Journal article Tidsskriftartikkel Peer reviewed 2018 ftunivtroemsoe https://doi.org/10.3389/fmars.2018.00158 2021-06-25T17:56:00Z Source at https://doi.org/10.3389/fmars.2018.00158 . Accepted manuscript version, licensed CC BY-NC-ND 4.0. In autumn 2015, several sources reported observations of large amounts of gelatinous material in a large north Norwegian fjord system, either caught when trawling for other organisms or fouling fishing gear. The responsible organism was identified as a physonect siphonophore, Nanomia cara, while a ctenophore, Beroe cucumis, and a hydromedusa, Modeeria rotunda, were also registered in high abundances on a couple of occasions. To document the phenomena, we have compiled a variety of data from concurrent fisheries surveys and local fishermen, including physical samples, trawl catch, and acoustic data, photo and video evidence, and environmental data. Because of the gas-filled pneumatophore, characteristic for these types of siphonophores, acoustics provided detailed and unique insight to the horizontal and vertical distribution and potential abundances (~0.2–20 colonies·m−3) of N. cara with the highest concentrations observed in the near bottom region at ~320 m depth in the study area. This suggests that these animals were retained and accumulated in the deep basins of the fjord system possibly blooming here because of favorable environmental conditions and potentially higher prey availability compared to the shallower shelf areas to the north. Few cues as to the origin and onset of the bloom were found, but it may have originated from locally resident siphonophores. The characteristics of the deep-water masses in the fjord basins were different compared to the deep water outside the fjord system, suggesting no recent deep-water import to the fjords. However, water-masses containing siphonophores (not necessarily very abundant), may have been additionally introduced to the fjords at intermediate depths, with the animals subsequently trapped in the deeper fjord basins. The simultaneous observations of abundant siphonophores, hydromedusae, and ctenophores in the Lyngen-Kvænangen fjord system are intriguing, but difficult to provide a unified explanation for, as the organisms differ in their biology and ecology. Nanomia and Beroe spp. are holopelagic, while M. rotunda has a benthic hydroid stage. The species also have different trophic ecologies and dietary preferences. Only by combining information from acoustics, trawling, genetics, and local fishermen, were the identity, abundance, and the vertical and horizontal distribution of the physonect siphonophore, N. cara, established. Article in Journal/Newspaper Arctic Kvænangen Northern Norway Lyngen University of Tromsø: Munin Open Research Archive Cara ENVELOPE(161.100,161.100,-82.750,-82.750) Kvænangen ENVELOPE(21.726,21.726,69.931,69.931) Norway Rotunda ENVELOPE(161.567,161.567,-78.017,-78.017) Frontiers in Marine Science 5 |