Drift diving: A quick and accurate method for assessment of anadromous salmonid spawning populations
Abstract The accuracy of drift diving surveys of Atlantic salmon, Salmo salar L. and sea trout, Salmo trutta L., was evaluated by comparing the abundance and size distribution with catches in a fish trap over 6 years in the River Etneelva, western Norway. The population count from drift diving accou...
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crwiley:10.1111/fme.12491 2024-10-13T14:06:07+00:00 Drift diving: A quick and accurate method for assessment of anadromous salmonid spawning populations Skoglund, Helge Vollset, Knut Wiik Lennox, Robert Skaala, Øystein Barlaup, Bjørn Torgeir Miljødirektoratet Nærings- og Fiskeridepartementet 2021 http://dx.doi.org/10.1111/fme.12491 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fme.12491 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/fme.12491 en eng Wiley http://creativecommons.org/licenses/by-nc/4.0/ Fisheries Management and Ecology volume 28, issue 5, page 478-485 ISSN 0969-997X 1365-2400 journal-article 2021 crwiley https://doi.org/10.1111/fme.12491 2024-09-19T04:19:37Z Abstract The accuracy of drift diving surveys of Atlantic salmon, Salmo salar L. and sea trout, Salmo trutta L., was evaluated by comparing the abundance and size distribution with catches in a fish trap over 6 years in the River Etneelva, western Norway. The population count from drift diving accounted for on average 96.3% of the salmon in the trap after accounting for the catches during fishing. Size structure registered during drift diving corresponded with trap catches of salmon, but the number of small salmon (<3 kg) appeared to be somewhat underestimated, while large salmon (>7 kg) were overestimated in drift diving. For sea trout, the match between drift diving counts and trap registrations was poorer (average 76.3%), but may have been affected by the surveys being performed too late with regards to sea trout spawning time. The study illustrates the utility of drift counting for estimating the entire population of anadromous salmonids in a river. Article in Journal/Newspaper Atlantic salmon Salmo salar Wiley Online Library Norway Fisheries Management and Ecology 28 5 478 485 |
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Open Polar |
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Wiley Online Library |
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crwiley |
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English |
description |
Abstract The accuracy of drift diving surveys of Atlantic salmon, Salmo salar L. and sea trout, Salmo trutta L., was evaluated by comparing the abundance and size distribution with catches in a fish trap over 6 years in the River Etneelva, western Norway. The population count from drift diving accounted for on average 96.3% of the salmon in the trap after accounting for the catches during fishing. Size structure registered during drift diving corresponded with trap catches of salmon, but the number of small salmon (<3 kg) appeared to be somewhat underestimated, while large salmon (>7 kg) were overestimated in drift diving. For sea trout, the match between drift diving counts and trap registrations was poorer (average 76.3%), but may have been affected by the surveys being performed too late with regards to sea trout spawning time. The study illustrates the utility of drift counting for estimating the entire population of anadromous salmonids in a river. |
author2 |
Miljødirektoratet Nærings- og Fiskeridepartementet |
format |
Article in Journal/Newspaper |
author |
Skoglund, Helge Vollset, Knut Wiik Lennox, Robert Skaala, Øystein Barlaup, Bjørn Torgeir |
spellingShingle |
Skoglund, Helge Vollset, Knut Wiik Lennox, Robert Skaala, Øystein Barlaup, Bjørn Torgeir Drift diving: A quick and accurate method for assessment of anadromous salmonid spawning populations |
author_facet |
Skoglund, Helge Vollset, Knut Wiik Lennox, Robert Skaala, Øystein Barlaup, Bjørn Torgeir |
author_sort |
Skoglund, Helge |
title |
Drift diving: A quick and accurate method for assessment of anadromous salmonid spawning populations |
title_short |
Drift diving: A quick and accurate method for assessment of anadromous salmonid spawning populations |
title_full |
Drift diving: A quick and accurate method for assessment of anadromous salmonid spawning populations |
title_fullStr |
Drift diving: A quick and accurate method for assessment of anadromous salmonid spawning populations |
title_full_unstemmed |
Drift diving: A quick and accurate method for assessment of anadromous salmonid spawning populations |
title_sort |
drift diving: a quick and accurate method for assessment of anadromous salmonid spawning populations |
publisher |
Wiley |
publishDate |
2021 |
url |
http://dx.doi.org/10.1111/fme.12491 https://onlinelibrary.wiley.com/doi/pdf/10.1111/fme.12491 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/fme.12491 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Fisheries Management and Ecology volume 28, issue 5, page 478-485 ISSN 0969-997X 1365-2400 |
op_rights |
http://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.1111/fme.12491 |
container_title |
Fisheries Management and Ecology |
container_volume |
28 |
container_issue |
5 |
container_start_page |
478 |
op_container_end_page |
485 |
_version_ |
1812812162698051584 |