Multiple determinants of welfare in farmed fish: stocking density, disturbance, and aggression in Atlantic salmon ( Salmo salar)
Adult Atlantic salmon (Salmo salar) were held in seawater tanks at stocking densities of 15, 25, and 35 kg·m –3 (with five replicates). After 51 days, four measures of welfare (body condition, fin condition, plasma glucose, and cortisol) were collected and combined by principal components analysis i...
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2007
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crcansciencepubl:10.1139/f07-018 2024-10-13T14:06:02+00:00 Multiple determinants of welfare in farmed fish: stocking density, disturbance, and aggression in Atlantic salmon ( Salmo salar) Adams, C E Turnbull, J F Bell, A Bron, J E Huntingford, F A 2007 http://dx.doi.org/10.1139/f07-018 http://www.nrcresearchpress.com/doi/pdf/10.1139/f07-018 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 64, issue 2, page 336-344 ISSN 0706-652X 1205-7533 journal-article 2007 crcansciencepubl https://doi.org/10.1139/f07-018 2024-09-27T04:07:25Z Adult Atlantic salmon (Salmo salar) were held in seawater tanks at stocking densities of 15, 25, and 35 kg·m –3 (with five replicates). After 51 days, four measures of welfare (body condition, fin condition, plasma glucose, and cortisol) were collected and combined by principal components analysis into an integrated welfare score for each fish. Fish with high and low welfare scores were found in all conditions, but overall welfare was best at the intermediate density, supporting the view that low densities as well as high densities can compromise welfare in salmon. The effect of stocking density interacted with the stronger effect of disturbance, creating a complex pattern of variation in welfare among the experimental tanks. Counter-intuitively, welfare scores were higher in tanks with a high level of disturbance, while welfare scores were strikingly low at the lowest density. Aggression in all tanks was low, but rose after feeding, when aggression was negatively related to both disturbance and stocking density. These data highlight the complex determinants of welfare in fish in production systems and, taken together, suggest that negative effects of husbandry practice and density on welfare in Atlantic salmon might be mediated by their influence on social interactions. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Fisheries and Aquatic Sciences 64 2 336 344 |
institution |
Open Polar |
collection |
Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
Adult Atlantic salmon (Salmo salar) were held in seawater tanks at stocking densities of 15, 25, and 35 kg·m –3 (with five replicates). After 51 days, four measures of welfare (body condition, fin condition, plasma glucose, and cortisol) were collected and combined by principal components analysis into an integrated welfare score for each fish. Fish with high and low welfare scores were found in all conditions, but overall welfare was best at the intermediate density, supporting the view that low densities as well as high densities can compromise welfare in salmon. The effect of stocking density interacted with the stronger effect of disturbance, creating a complex pattern of variation in welfare among the experimental tanks. Counter-intuitively, welfare scores were higher in tanks with a high level of disturbance, while welfare scores were strikingly low at the lowest density. Aggression in all tanks was low, but rose after feeding, when aggression was negatively related to both disturbance and stocking density. These data highlight the complex determinants of welfare in fish in production systems and, taken together, suggest that negative effects of husbandry practice and density on welfare in Atlantic salmon might be mediated by their influence on social interactions. |
format |
Article in Journal/Newspaper |
author |
Adams, C E Turnbull, J F Bell, A Bron, J E Huntingford, F A |
spellingShingle |
Adams, C E Turnbull, J F Bell, A Bron, J E Huntingford, F A Multiple determinants of welfare in farmed fish: stocking density, disturbance, and aggression in Atlantic salmon ( Salmo salar) |
author_facet |
Adams, C E Turnbull, J F Bell, A Bron, J E Huntingford, F A |
author_sort |
Adams, C E |
title |
Multiple determinants of welfare in farmed fish: stocking density, disturbance, and aggression in Atlantic salmon ( Salmo salar) |
title_short |
Multiple determinants of welfare in farmed fish: stocking density, disturbance, and aggression in Atlantic salmon ( Salmo salar) |
title_full |
Multiple determinants of welfare in farmed fish: stocking density, disturbance, and aggression in Atlantic salmon ( Salmo salar) |
title_fullStr |
Multiple determinants of welfare in farmed fish: stocking density, disturbance, and aggression in Atlantic salmon ( Salmo salar) |
title_full_unstemmed |
Multiple determinants of welfare in farmed fish: stocking density, disturbance, and aggression in Atlantic salmon ( Salmo salar) |
title_sort |
multiple determinants of welfare in farmed fish: stocking density, disturbance, and aggression in atlantic salmon ( salmo salar) |
publisher |
Canadian Science Publishing |
publishDate |
2007 |
url |
http://dx.doi.org/10.1139/f07-018 http://www.nrcresearchpress.com/doi/pdf/10.1139/f07-018 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 64, issue 2, page 336-344 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f07-018 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
64 |
container_issue |
2 |
container_start_page |
336 |
op_container_end_page |
344 |
_version_ |
1812812068909219840 |