Distinguishing Arctic charr with different stress coping styles by visual screening of spottiness – reliability and consistency over time
Abstract The salmonid fish Arctic charr Salvelinus alpinus shows pronounced individual variation in skin colouration and density of carotenoid‐based spots. It has earlier been shown that spot density is a heritable trait, and may be used as an indicator of stress coping style in Arctic charr. Indivi...
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Online Access: | http://dx.doi.org/10.1111/jzo.12374 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjzo.12374 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jzo.12374 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jzo.12374 https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/jzo.12374 |
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crwiley:10.1111/jzo.12374 2023-12-03T10:15:26+01:00 Distinguishing Arctic charr with different stress coping styles by visual screening of spottiness – reliability and consistency over time Brännäs, E. Backström, T. Nilsson, J. Carlberg, H. Stien, L. H. Magnhagen, C. Svenska Forskningsrådet Formas European Commission 2016 http://dx.doi.org/10.1111/jzo.12374 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjzo.12374 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jzo.12374 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jzo.12374 https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/jzo.12374 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Zoology volume 300, issue 3, page 213-220 ISSN 0952-8369 1469-7998 Animal Science and Zoology Ecology, Evolution, Behavior and Systematics journal-article 2016 crwiley https://doi.org/10.1111/jzo.12374 2023-11-09T14:15:04Z Abstract The salmonid fish Arctic charr Salvelinus alpinus shows pronounced individual variation in skin colouration and density of carotenoid‐based spots. It has earlier been shown that spot density is a heritable trait, and may be used as an indicator of stress coping style in Arctic charr. Individuals with few spots tend to be more aggressive and less responsive to stress (proactive) than those with many spots (reactive). Here, we evaluate the potential of grading individuals into proactive and reactive individuals by the density of light‐coloured spots. This non‐invasive method would be useful for selective breeding and to reduce within‐treatment variation in biological research. Our aim was to investigate stability of spot density over time and to compare methods to estimate spottiness on Arctic charr, using photographs as well as live fish. The consistency of spot density was significant over a period of 8 months, but with stronger correlations between September and December than between May and September. Also, repeatability of spot number was higher between the two last months than when including May. The spots were more stable on the left than the right side, thus, it is more reliable to estimate spottiness on the left side. There was a significant relationship between the ratio of spotted area (rsa) from automated image analysis and number of spots from visual counts. Both methods fitted well into a visual grading into three categories (few, medium and many spots). In another test, a large number of live fish were visually categorized according to spot density. The previous validation process, in combination with a significant family effect showed that large numbers of fish can be effectively graded. Article in Journal/Newspaper Arctic charr Arctic Salvelinus alpinus Wiley Online Library (via Crossref) Arctic Journal of Zoology 300 3 213 220 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics Brännäs, E. Backström, T. Nilsson, J. Carlberg, H. Stien, L. H. Magnhagen, C. Distinguishing Arctic charr with different stress coping styles by visual screening of spottiness – reliability and consistency over time |
topic_facet |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
description |
Abstract The salmonid fish Arctic charr Salvelinus alpinus shows pronounced individual variation in skin colouration and density of carotenoid‐based spots. It has earlier been shown that spot density is a heritable trait, and may be used as an indicator of stress coping style in Arctic charr. Individuals with few spots tend to be more aggressive and less responsive to stress (proactive) than those with many spots (reactive). Here, we evaluate the potential of grading individuals into proactive and reactive individuals by the density of light‐coloured spots. This non‐invasive method would be useful for selective breeding and to reduce within‐treatment variation in biological research. Our aim was to investigate stability of spot density over time and to compare methods to estimate spottiness on Arctic charr, using photographs as well as live fish. The consistency of spot density was significant over a period of 8 months, but with stronger correlations between September and December than between May and September. Also, repeatability of spot number was higher between the two last months than when including May. The spots were more stable on the left than the right side, thus, it is more reliable to estimate spottiness on the left side. There was a significant relationship between the ratio of spotted area (rsa) from automated image analysis and number of spots from visual counts. Both methods fitted well into a visual grading into three categories (few, medium and many spots). In another test, a large number of live fish were visually categorized according to spot density. The previous validation process, in combination with a significant family effect showed that large numbers of fish can be effectively graded. |
author2 |
Svenska Forskningsrådet Formas European Commission |
format |
Article in Journal/Newspaper |
author |
Brännäs, E. Backström, T. Nilsson, J. Carlberg, H. Stien, L. H. Magnhagen, C. |
author_facet |
Brännäs, E. Backström, T. Nilsson, J. Carlberg, H. Stien, L. H. Magnhagen, C. |
author_sort |
Brännäs, E. |
title |
Distinguishing Arctic charr with different stress coping styles by visual screening of spottiness – reliability and consistency over time |
title_short |
Distinguishing Arctic charr with different stress coping styles by visual screening of spottiness – reliability and consistency over time |
title_full |
Distinguishing Arctic charr with different stress coping styles by visual screening of spottiness – reliability and consistency over time |
title_fullStr |
Distinguishing Arctic charr with different stress coping styles by visual screening of spottiness – reliability and consistency over time |
title_full_unstemmed |
Distinguishing Arctic charr with different stress coping styles by visual screening of spottiness – reliability and consistency over time |
title_sort |
distinguishing arctic charr with different stress coping styles by visual screening of spottiness – reliability and consistency over time |
publisher |
Wiley |
publishDate |
2016 |
url |
http://dx.doi.org/10.1111/jzo.12374 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjzo.12374 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jzo.12374 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jzo.12374 https://zslpublications.onlinelibrary.wiley.com/doi/pdf/10.1111/jzo.12374 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic charr Arctic Salvelinus alpinus |
genre_facet |
Arctic charr Arctic Salvelinus alpinus |
op_source |
Journal of Zoology volume 300, issue 3, page 213-220 ISSN 0952-8369 1469-7998 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jzo.12374 |
container_title |
Journal of Zoology |
container_volume |
300 |
container_issue |
3 |
container_start_page |
213 |
op_container_end_page |
220 |
_version_ |
1784262354938101760 |