Drift diving: A quick and accurate method for assessment of anadromous salmonid spawning populations
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...
Published in: | Fisheries Management and Ecology |
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Language: | Norwegian Bokmål |
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Online Access: | https://hdl.handle.net/11250/2763534 https://doi.org/10.1111/fme.12491 |
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ftimr:oai:imr.brage.unit.no:11250/2763534 2023-05-15T15:32:14+02:00 Drift diving: A quick and accurate method for assessment of anadromous salmonid spawning populations Skoglund, Helge Vollset, Knut Lennox, Robert J. Skaala, Øystein Barlaup, Bjørn Torgeir 2021 application/pdf https://hdl.handle.net/11250/2763534 https://doi.org/10.1111/fme.12491 nob nob https://onlinelibrary.wiley.com/doi/10.1111/fme.12491 Fisheries Management and Ecology. 2021, . urn:issn:0969-997X https://hdl.handle.net/11250/2763534 https://doi.org/10.1111/fme.12491 cristin:1914470 8 Fisheries Management and Ecology Peer reviewed Journal article 2021 ftimr https://doi.org/10.1111/fme.12491 2021-09-23T20:15:38Z 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. publishedVersion Article in Journal/Newspaper Atlantic salmon Salmo salar Institute for Marine Research: Brage IMR Norway Fisheries Management and Ecology |
institution |
Open Polar |
collection |
Institute for Marine Research: Brage IMR |
op_collection_id |
ftimr |
language |
Norwegian Bokmål |
description |
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. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Skoglund, Helge Vollset, Knut Lennox, Robert J. Skaala, Øystein Barlaup, Bjørn Torgeir |
spellingShingle |
Skoglund, Helge Vollset, Knut Lennox, Robert J. 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 Lennox, Robert J. 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 |
publishDate |
2021 |
url |
https://hdl.handle.net/11250/2763534 https://doi.org/10.1111/fme.12491 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
8 Fisheries Management and Ecology |
op_relation |
https://onlinelibrary.wiley.com/doi/10.1111/fme.12491 Fisheries Management and Ecology. 2021, . urn:issn:0969-997X https://hdl.handle.net/11250/2763534 https://doi.org/10.1111/fme.12491 cristin:1914470 |
op_doi |
https://doi.org/10.1111/fme.12491 |
container_title |
Fisheries Management and Ecology |
_version_ |
1766362736468426752 |