Horizontal and Vertical Migration of Anglerfish Lophius piscatorius in Relation to Hydrography in Faroese Waters
Adult anglerfish conduct annual migrations between spawning areas and feeding areas; for Faroese waters this migration has so far not been described. Therefore, anglerfish migration and distribution in Faroese waters was investigated by mark-recapture studies, including data storage tags, as well as...
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ftdoajarticles:oai:doaj.org/article:7507f2394e854232aea60ce50f4358e3 2023-05-15T16:10:56+02:00 Horizontal and Vertical Migration of Anglerfish Lophius piscatorius in Relation to Hydrography in Faroese Waters Lise Helen Ofstad Hjálmar Hátún Torstein Pedersen Petur Steingrund Bjarni Mikkelsen 2022-03-01T00:00:00Z https://doi.org/10.3389/fmars.2022.823066 https://doaj.org/article/7507f2394e854232aea60ce50f4358e3 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2022.823066/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2022.823066 https://doaj.org/article/7507f2394e854232aea60ce50f4358e3 Frontiers in Marine Science, Vol 9 (2022) anglerfish data storage tag hydrography Faroe Islands Lophius piscatorius mark-recapture Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2022 ftdoajarticles https://doi.org/10.3389/fmars.2022.823066 2022-12-31T10:15:03Z Adult anglerfish conduct annual migrations between spawning areas and feeding areas; for Faroese waters this migration has so far not been described. Therefore, anglerfish migration and distribution in Faroese waters was investigated by mark-recapture studies, including data storage tags, as well as data from scientific trawl surveys, commercial trawlers and gillnetters. The fish distribution was compared to hydrographical conditions such as sea surface- and bottom temperature. A clear seasonal offshore-onshore migration was observed. Anglerfish occupied shallower waters (<200 m) during summer and deeper waters, especially on the western side of the Faroe shelf, during winter. This seasonal movement was most evident for sexually mature fish longer than 70 cm indicating spawning in deep waters during winter. Further, during winter anglerfish experienced cold water, which indicated that they were distributed close to the main interface of cold water masses surrounding the shelf. The fish were mostly located in warm water (6.5–11°C) and seldom occurred in colder waters than 4°C. Anglerfish appeared generally inactive, only around 5% of the total data storage tag recordings showed more than 5 m vertical movement between two subsequent hourly recordings. This vertical activity varied seasonally by being higher during winter than summer and diurnally by being higher during night time than day time, indicating that sunrise and day length played an important role in vertical movements. Article in Journal/Newspaper Faroe Islands Directory of Open Access Journals: DOAJ Articles Faroe Islands Faroe Shelf ENVELOPE(-6.000,-6.000,62.000,62.000) Frontiers in Marine Science 9 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
anglerfish data storage tag hydrography Faroe Islands Lophius piscatorius mark-recapture Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
anglerfish data storage tag hydrography Faroe Islands Lophius piscatorius mark-recapture Science Q General. Including nature conservation geographical distribution QH1-199.5 Lise Helen Ofstad Hjálmar Hátún Torstein Pedersen Petur Steingrund Bjarni Mikkelsen Horizontal and Vertical Migration of Anglerfish Lophius piscatorius in Relation to Hydrography in Faroese Waters |
topic_facet |
anglerfish data storage tag hydrography Faroe Islands Lophius piscatorius mark-recapture Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Adult anglerfish conduct annual migrations between spawning areas and feeding areas; for Faroese waters this migration has so far not been described. Therefore, anglerfish migration and distribution in Faroese waters was investigated by mark-recapture studies, including data storage tags, as well as data from scientific trawl surveys, commercial trawlers and gillnetters. The fish distribution was compared to hydrographical conditions such as sea surface- and bottom temperature. A clear seasonal offshore-onshore migration was observed. Anglerfish occupied shallower waters (<200 m) during summer and deeper waters, especially on the western side of the Faroe shelf, during winter. This seasonal movement was most evident for sexually mature fish longer than 70 cm indicating spawning in deep waters during winter. Further, during winter anglerfish experienced cold water, which indicated that they were distributed close to the main interface of cold water masses surrounding the shelf. The fish were mostly located in warm water (6.5–11°C) and seldom occurred in colder waters than 4°C. Anglerfish appeared generally inactive, only around 5% of the total data storage tag recordings showed more than 5 m vertical movement between two subsequent hourly recordings. This vertical activity varied seasonally by being higher during winter than summer and diurnally by being higher during night time than day time, indicating that sunrise and day length played an important role in vertical movements. |
format |
Article in Journal/Newspaper |
author |
Lise Helen Ofstad Hjálmar Hátún Torstein Pedersen Petur Steingrund Bjarni Mikkelsen |
author_facet |
Lise Helen Ofstad Hjálmar Hátún Torstein Pedersen Petur Steingrund Bjarni Mikkelsen |
author_sort |
Lise Helen Ofstad |
title |
Horizontal and Vertical Migration of Anglerfish Lophius piscatorius in Relation to Hydrography in Faroese Waters |
title_short |
Horizontal and Vertical Migration of Anglerfish Lophius piscatorius in Relation to Hydrography in Faroese Waters |
title_full |
Horizontal and Vertical Migration of Anglerfish Lophius piscatorius in Relation to Hydrography in Faroese Waters |
title_fullStr |
Horizontal and Vertical Migration of Anglerfish Lophius piscatorius in Relation to Hydrography in Faroese Waters |
title_full_unstemmed |
Horizontal and Vertical Migration of Anglerfish Lophius piscatorius in Relation to Hydrography in Faroese Waters |
title_sort |
horizontal and vertical migration of anglerfish lophius piscatorius in relation to hydrography in faroese waters |
publisher |
Frontiers Media S.A. |
publishDate |
2022 |
url |
https://doi.org/10.3389/fmars.2022.823066 https://doaj.org/article/7507f2394e854232aea60ce50f4358e3 |
long_lat |
ENVELOPE(-6.000,-6.000,62.000,62.000) |
geographic |
Faroe Islands Faroe Shelf |
geographic_facet |
Faroe Islands Faroe Shelf |
genre |
Faroe Islands |
genre_facet |
Faroe Islands |
op_source |
Frontiers in Marine Science, Vol 9 (2022) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2022.823066/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2022.823066 https://doaj.org/article/7507f2394e854232aea60ce50f4358e3 |
op_doi |
https://doi.org/10.3389/fmars.2022.823066 |
container_title |
Frontiers in Marine Science |
container_volume |
9 |
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1765996068067082240 |