Social network analysis of behavioural interactions influencing the development of fin damage in Atlantic salmon (Salmo salar)
The development of fin damage in Atlantic salmon parr was investigated using social network analysis of behavioural interactions occurring under different feeding and stocking conditions. Four separate experiments were carried out in which groups of fish were subjected to a long food restriction per...
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Department of Veterinary Medicine
2011
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Online Access: | http://www.dspace.cam.ac.uk/handle/1810/240640 https://doi.org/10.17863/CAM.16356 https://www.repository.cam.ac.uk/handle/1810/240640 |
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ftunivcam:oai:www.repository.cam.ac.uk:1810/240640 2023-07-30T04:02:25+02:00 Social network analysis of behavioural interactions influencing the development of fin damage in Atlantic salmon (Salmo salar) Cañon Jones, Hernán Alberto Pearce, Gareth P. 2011-10-11 application/pdf http://www.dspace.cam.ac.uk/handle/1810/240640 https://doi.org/10.17863/CAM.16356 https://www.repository.cam.ac.uk/handle/1810/240640 en eng Department of Veterinary Medicine Magdalene College University of Cambridge doi:10.17863/CAM.16356 http://www.dspace.cam.ac.uk/handle/1810/240640 https://www.repository.cam.ac.uk/handle/1810/240640 Attribution-NonCommercial-NoDerivs 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-nd/2.0/uk/ Fish Welfare Behaviour Network Thesis Doctoral Doctor of Philosophy (PhD) 2011 ftunivcam https://doi.org/10.17863/CAM.16356 2023-07-10T21:23:27Z The development of fin damage in Atlantic salmon parr was investigated using social network analysis of behavioural interactions occurring under different feeding and stocking conditions. Four separate experiments were carried out in which groups of fish were subjected to a long food restriction period (30 days) described in Chapter 2, high (30 kg/m3) or low (8 kg/m3) fish stocking densities (Chapter 3), predictable or unpredictable food delivery regime (Chapter 4) or a short food restriction period (10 days) described in Chapter 5. Dorsal fin damage (erosion, splits and fin index) was significantly higher in groups of fish subjected to food restriction periods (short and long), held at high stocking density (30 kg/m3) or with an unpredictable food delivery regime. No other fins were found to be affected by fin damage irrespective of the treatment. The social networks based on aggressive interactions showed higher centrality, clustering coefficients, in-degree centrality, out-degree centrality and less dense networks in groups subjected to food restriction (short and long), low stocking densities 8 kg/m3), and unpredictable food delivery. The high centralities and clustering coefficients indicated separation of fish within the groups into initiators of aggression and receivers of aggression. This separation of roles was seen only in the food restricted group, high density groups and unpredictable food delivery groups. Initiators had higher out-degree centrality while receivers showed high in-degree centrality. Also, initiators of aggressive interactions had less fin erosion, higher final weights and higher body lengths than receivers of aggression. The severity of fin damage was significantly higher when this role differentiation occurred, and it was highly correlated with fin biting events. Additionally, overall aggression was higher in food restricted groups, low density groups and unpredictable groups. The dynamic analyses of networks over time (Chapter 6) showed that fish classified as initiators of ... Doctoral or Postdoctoral Thesis Atlantic salmon Salmo salar Apollo - University of Cambridge Repository |
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Apollo - University of Cambridge Repository |
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ftunivcam |
language |
English |
topic |
Fish Welfare Behaviour Network |
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Fish Welfare Behaviour Network Cañon Jones, Hernán Alberto Social network analysis of behavioural interactions influencing the development of fin damage in Atlantic salmon (Salmo salar) |
topic_facet |
Fish Welfare Behaviour Network |
description |
The development of fin damage in Atlantic salmon parr was investigated using social network analysis of behavioural interactions occurring under different feeding and stocking conditions. Four separate experiments were carried out in which groups of fish were subjected to a long food restriction period (30 days) described in Chapter 2, high (30 kg/m3) or low (8 kg/m3) fish stocking densities (Chapter 3), predictable or unpredictable food delivery regime (Chapter 4) or a short food restriction period (10 days) described in Chapter 5. Dorsal fin damage (erosion, splits and fin index) was significantly higher in groups of fish subjected to food restriction periods (short and long), held at high stocking density (30 kg/m3) or with an unpredictable food delivery regime. No other fins were found to be affected by fin damage irrespective of the treatment. The social networks based on aggressive interactions showed higher centrality, clustering coefficients, in-degree centrality, out-degree centrality and less dense networks in groups subjected to food restriction (short and long), low stocking densities 8 kg/m3), and unpredictable food delivery. The high centralities and clustering coefficients indicated separation of fish within the groups into initiators of aggression and receivers of aggression. This separation of roles was seen only in the food restricted group, high density groups and unpredictable food delivery groups. Initiators had higher out-degree centrality while receivers showed high in-degree centrality. Also, initiators of aggressive interactions had less fin erosion, higher final weights and higher body lengths than receivers of aggression. The severity of fin damage was significantly higher when this role differentiation occurred, and it was highly correlated with fin biting events. Additionally, overall aggression was higher in food restricted groups, low density groups and unpredictable groups. The dynamic analyses of networks over time (Chapter 6) showed that fish classified as initiators of ... |
author2 |
Pearce, Gareth P. |
format |
Doctoral or Postdoctoral Thesis |
author |
Cañon Jones, Hernán Alberto |
author_facet |
Cañon Jones, Hernán Alberto |
author_sort |
Cañon Jones, Hernán Alberto |
title |
Social network analysis of behavioural interactions influencing the development of fin damage in Atlantic salmon (Salmo salar) |
title_short |
Social network analysis of behavioural interactions influencing the development of fin damage in Atlantic salmon (Salmo salar) |
title_full |
Social network analysis of behavioural interactions influencing the development of fin damage in Atlantic salmon (Salmo salar) |
title_fullStr |
Social network analysis of behavioural interactions influencing the development of fin damage in Atlantic salmon (Salmo salar) |
title_full_unstemmed |
Social network analysis of behavioural interactions influencing the development of fin damage in Atlantic salmon (Salmo salar) |
title_sort |
social network analysis of behavioural interactions influencing the development of fin damage in atlantic salmon (salmo salar) |
publisher |
Department of Veterinary Medicine |
publishDate |
2011 |
url |
http://www.dspace.cam.ac.uk/handle/1810/240640 https://doi.org/10.17863/CAM.16356 https://www.repository.cam.ac.uk/handle/1810/240640 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
doi:10.17863/CAM.16356 http://www.dspace.cam.ac.uk/handle/1810/240640 https://www.repository.cam.ac.uk/handle/1810/240640 |
op_rights |
Attribution-NonCommercial-NoDerivs 2.0 UK: England & Wales http://creativecommons.org/licenses/by-nc-nd/2.0/uk/ |
op_doi |
https://doi.org/10.17863/CAM.16356 |
_version_ |
1772813223508049920 |