The effect of aerobic training on growth, muscle development and heart condition in Atlantic salmon (Salmo salar) post-smolts in large-scale semi-closed containment systems.
Exposing fish to moderate water currents as a form of exercise is often perceived as positive for fish welfare, growth, muscle development and heart condition. This thesis examines what effect rearing Atlantic salmon (Salmo salar) post-smolts in a flow through semi-closed raceway system (Preline) ha...
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The University of Bergen
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ftunivbergen:oai:bora.uib.no:1956/16316 2023-05-15T15:32:09+02:00 The effect of aerobic training on growth, muscle development and heart condition in Atlantic salmon (Salmo salar) post-smolts in large-scale semi-closed containment systems. Moe, Øyvind Grøner 2017-06-23T22:00:03Z application/pdf https://hdl.handle.net/1956/16316 eng eng The University of Bergen https://hdl.handle.net/1956/16316 Copyright the Author. All rights reserved Lakseoppdrett Oppdrettslaks Fysisk aktivitet Muskelfibre Strømforhold https://data.ub.uio.no/realfagstermer/c011214 https://data.ub.uio.no/realfagstermer/c008998 https://data.ub.uio.no/realfagstermer/c012515 https://data.ub.uio.no/realfagstermer/c012649 https://data.ub.uio.no/realfagstermer/c012751 751999 Master thesis 2017 ftunivbergen 2023-03-14T17:44:32Z Exposing fish to moderate water currents as a form of exercise is often perceived as positive for fish welfare, growth, muscle development and heart condition. This thesis examines what effect rearing Atlantic salmon (Salmo salar) post-smolts in a flow through semi-closed raceway system (Preline) has on growth, mortality, feed conversion, and development of white skeletal and heart muscle. The experiment consists of three phases: 1. Smolt in freshwater 2. Post-smolt in seawater (Preline vs. control facilities) and 3. On-growing in seawater. A total of 321.412 smolts (101 g SEM ± 4.2) were distributed in two groups. Fish in the Preline system was exposed to a 10-20 cm/s water current and a traditional open cage system were used as control. Temperature, salinity and oxygen varied between the two systems, as this was a large-scale experiment and water conditions were difficult to control. After four months in the systems, the control fish had a significantly higher weight, length and condition factor compared to the Preline group. This was linked with higher temperatures at the control site. The Preline group had a 2.44 times higher frequency of small muscle fibres in the white skeletal muscle at the end of the post-smolt phase. This was associated with the Preline fish being exposed to a constant water flow, promoting aerobic exercise. Furthermore, the increased recruitment of white muscle fibres might increase the growth potential for further production. There were significantly higher elevated mRNA levels of MEF2C and GATA4, indicating cardiomyocyte hypertrophy, in the Preline group at the end of the post-smolt phase. This was also associated with aerobic exercise and can possibly help the fish cope with stressful situations they might be exposed to in a farming environment. Masteroppgave i biologi BIO399 Master Thesis Atlantic salmon Salmo salar University of Bergen: Bergen Open Research Archive (BORA-UiB) |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Lakseoppdrett Oppdrettslaks Fysisk aktivitet Muskelfibre Strømforhold https://data.ub.uio.no/realfagstermer/c011214 https://data.ub.uio.no/realfagstermer/c008998 https://data.ub.uio.no/realfagstermer/c012515 https://data.ub.uio.no/realfagstermer/c012649 https://data.ub.uio.no/realfagstermer/c012751 751999 |
spellingShingle |
Lakseoppdrett Oppdrettslaks Fysisk aktivitet Muskelfibre Strømforhold https://data.ub.uio.no/realfagstermer/c011214 https://data.ub.uio.no/realfagstermer/c008998 https://data.ub.uio.no/realfagstermer/c012515 https://data.ub.uio.no/realfagstermer/c012649 https://data.ub.uio.no/realfagstermer/c012751 751999 Moe, Øyvind Grøner The effect of aerobic training on growth, muscle development and heart condition in Atlantic salmon (Salmo salar) post-smolts in large-scale semi-closed containment systems. |
topic_facet |
Lakseoppdrett Oppdrettslaks Fysisk aktivitet Muskelfibre Strømforhold https://data.ub.uio.no/realfagstermer/c011214 https://data.ub.uio.no/realfagstermer/c008998 https://data.ub.uio.no/realfagstermer/c012515 https://data.ub.uio.no/realfagstermer/c012649 https://data.ub.uio.no/realfagstermer/c012751 751999 |
description |
Exposing fish to moderate water currents as a form of exercise is often perceived as positive for fish welfare, growth, muscle development and heart condition. This thesis examines what effect rearing Atlantic salmon (Salmo salar) post-smolts in a flow through semi-closed raceway system (Preline) has on growth, mortality, feed conversion, and development of white skeletal and heart muscle. The experiment consists of three phases: 1. Smolt in freshwater 2. Post-smolt in seawater (Preline vs. control facilities) and 3. On-growing in seawater. A total of 321.412 smolts (101 g SEM ± 4.2) were distributed in two groups. Fish in the Preline system was exposed to a 10-20 cm/s water current and a traditional open cage system were used as control. Temperature, salinity and oxygen varied between the two systems, as this was a large-scale experiment and water conditions were difficult to control. After four months in the systems, the control fish had a significantly higher weight, length and condition factor compared to the Preline group. This was linked with higher temperatures at the control site. The Preline group had a 2.44 times higher frequency of small muscle fibres in the white skeletal muscle at the end of the post-smolt phase. This was associated with the Preline fish being exposed to a constant water flow, promoting aerobic exercise. Furthermore, the increased recruitment of white muscle fibres might increase the growth potential for further production. There were significantly higher elevated mRNA levels of MEF2C and GATA4, indicating cardiomyocyte hypertrophy, in the Preline group at the end of the post-smolt phase. This was also associated with aerobic exercise and can possibly help the fish cope with stressful situations they might be exposed to in a farming environment. Masteroppgave i biologi BIO399 |
format |
Master Thesis |
author |
Moe, Øyvind Grøner |
author_facet |
Moe, Øyvind Grøner |
author_sort |
Moe, Øyvind Grøner |
title |
The effect of aerobic training on growth, muscle development and heart condition in Atlantic salmon (Salmo salar) post-smolts in large-scale semi-closed containment systems. |
title_short |
The effect of aerobic training on growth, muscle development and heart condition in Atlantic salmon (Salmo salar) post-smolts in large-scale semi-closed containment systems. |
title_full |
The effect of aerobic training on growth, muscle development and heart condition in Atlantic salmon (Salmo salar) post-smolts in large-scale semi-closed containment systems. |
title_fullStr |
The effect of aerobic training on growth, muscle development and heart condition in Atlantic salmon (Salmo salar) post-smolts in large-scale semi-closed containment systems. |
title_full_unstemmed |
The effect of aerobic training on growth, muscle development and heart condition in Atlantic salmon (Salmo salar) post-smolts in large-scale semi-closed containment systems. |
title_sort |
effect of aerobic training on growth, muscle development and heart condition in atlantic salmon (salmo salar) post-smolts in large-scale semi-closed containment systems. |
publisher |
The University of Bergen |
publishDate |
2017 |
url |
https://hdl.handle.net/1956/16316 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
https://hdl.handle.net/1956/16316 |
op_rights |
Copyright the Author. All rights reserved |
_version_ |
1766362660102733824 |