Increased precision of growth data gained by reading multiple scales from each individual of Atlantic salmon (Salmo salar)
- The precision of growth estimates based on fish scales often remains uncertain because of withinindividual variation in scale size and scale patterns, and also due to measurement errors. Based on scale readings of Atlantic salmon, we show that errors decreased with number of times and number of sc...
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Online Access: | http://hdl.handle.net/11250/2404995 https://doi.org/10.5324/fn.v36i0.1954 |
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ftunivmob:oai:nmbu.brage.unit.no:11250/2404995 2023-05-15T15:30:22+02:00 Increased precision of growth data gained by reading multiple scales from each individual of Atlantic salmon (Salmo salar) Increased precision of growth data gained by reading multiple scales from each individual of Atlantic salmon ( Salmo salar ) Haraldstad, Tormod Haugen, Thrond Oddvar Borgstrøm, Reidar Jonsson, Bror 2016-07-20T12:16:24Z application/pdf http://hdl.handle.net/11250/2404995 https://doi.org/10.5324/fn.v36i0.1954 eng eng Fauna Norvegica 2016, 36:1-7 urn:issn:1891-5396 http://hdl.handle.net/11250/2404995 https://doi.org/10.5324/fn.v36i0.1954 cristin:1340041 Navngivelse 3.0 Norge http://creativecommons.org/licenses/by/3.0/no/ CC-BY Journal article Peer reviewed 2016 ftunivmob https://doi.org/10.5324/fn.v36i0.1954 2021-09-23T20:15:46Z - The precision of growth estimates based on fish scales often remains uncertain because of withinindividual variation in scale size and scale patterns, and also due to measurement errors. Based on scale readings of Atlantic salmon, we show that errors decreased with number of times and number of scales read per fish. The annual number of scale circuli was not constant, but positively correlated with annual specific growth rates. Number of circuli deposited after the last winter correlated positively with sampling date. There was no significant relationship between mean inter-circuli distance and the total circuli number during the first and second year at sea. For growth estimation in scientific studies, we recommend the use of 4-5 scales per fish. Consideration should be given to both circuli number and inter-circuli distances when estimating growth rate instead of relying on inter-circuli distances only. circuli number, inter-circuli distances, measurement error, sampling error, scale reading Article in Journal/Newspaper Atlantic salmon Salmo salar Open archive Norwegian University of Life Sciences: Brage NMBU Fauna norvegica 36 1 |
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Open Polar |
collection |
Open archive Norwegian University of Life Sciences: Brage NMBU |
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ftunivmob |
language |
English |
description |
- The precision of growth estimates based on fish scales often remains uncertain because of withinindividual variation in scale size and scale patterns, and also due to measurement errors. Based on scale readings of Atlantic salmon, we show that errors decreased with number of times and number of scales read per fish. The annual number of scale circuli was not constant, but positively correlated with annual specific growth rates. Number of circuli deposited after the last winter correlated positively with sampling date. There was no significant relationship between mean inter-circuli distance and the total circuli number during the first and second year at sea. For growth estimation in scientific studies, we recommend the use of 4-5 scales per fish. Consideration should be given to both circuli number and inter-circuli distances when estimating growth rate instead of relying on inter-circuli distances only. circuli number, inter-circuli distances, measurement error, sampling error, scale reading |
format |
Article in Journal/Newspaper |
author |
Haraldstad, Tormod Haugen, Thrond Oddvar Borgstrøm, Reidar Jonsson, Bror |
spellingShingle |
Haraldstad, Tormod Haugen, Thrond Oddvar Borgstrøm, Reidar Jonsson, Bror Increased precision of growth data gained by reading multiple scales from each individual of Atlantic salmon (Salmo salar) |
author_facet |
Haraldstad, Tormod Haugen, Thrond Oddvar Borgstrøm, Reidar Jonsson, Bror |
author_sort |
Haraldstad, Tormod |
title |
Increased precision of growth data gained by reading multiple scales from each individual of Atlantic salmon (Salmo salar) |
title_short |
Increased precision of growth data gained by reading multiple scales from each individual of Atlantic salmon (Salmo salar) |
title_full |
Increased precision of growth data gained by reading multiple scales from each individual of Atlantic salmon (Salmo salar) |
title_fullStr |
Increased precision of growth data gained by reading multiple scales from each individual of Atlantic salmon (Salmo salar) |
title_full_unstemmed |
Increased precision of growth data gained by reading multiple scales from each individual of Atlantic salmon (Salmo salar) |
title_sort |
increased precision of growth data gained by reading multiple scales from each individual of atlantic salmon (salmo salar) |
publishDate |
2016 |
url |
http://hdl.handle.net/11250/2404995 https://doi.org/10.5324/fn.v36i0.1954 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
Fauna Norvegica 2016, 36:1-7 urn:issn:1891-5396 http://hdl.handle.net/11250/2404995 https://doi.org/10.5324/fn.v36i0.1954 cristin:1340041 |
op_rights |
Navngivelse 3.0 Norge http://creativecommons.org/licenses/by/3.0/no/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.5324/fn.v36i0.1954 |
container_title |
Fauna norvegica |
container_volume |
36 |
container_start_page |
1 |
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1766360809165815808 |