Effects of husbandry on prevalence of amoebic gill disease and performance of reared Atlantic salmon (Salmo salar L.)
Improved husbandry has been identified as an area that may alleviate amoebic gill disease (AGD) on Tasmanian salmon farms. We report results of three trials that aimed to reduce AGD prevalence and/or minimise losses associated with AGD. In the first trial, cages were rotated between different sites...
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Elsevier Science
2004
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Online Access: | https://doi.org/10.1016/j.aquaculture.2004.07.026 http://ecite.utas.edu.au/30082 |
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ftunivtasecite:oai:ecite.utas.edu.au:30082 2023-05-15T15:32:36+02:00 Effects of husbandry on prevalence of amoebic gill disease and performance of reared Atlantic salmon (Salmo salar L.) Douglas-Helders, GM Weir, IJ O'Brien, DP Carson, J Nowak, BF 2004 https://doi.org/10.1016/j.aquaculture.2004.07.026 http://ecite.utas.edu.au/30082 en eng Elsevier Science http://dx.doi.org/10.1016/j.aquaculture.2004.07.026 Douglas-Helders, GM and Weir, IJ and O'Brien, DP and Carson, J and Nowak, BF, Effects of husbandry on prevalence of amoebic gill disease and performance of reared Atlantic salmon (Salmo salar L.), Aquaculture, 241, (1-4) pp. 21-30. ISSN 0044-8486 (2004) [Refereed Article] http://ecite.utas.edu.au/30082 Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture Refereed Article PeerReviewed 2004 ftunivtasecite https://doi.org/10.1016/j.aquaculture.2004.07.026 2019-12-13T21:10:02Z Improved husbandry has been identified as an area that may alleviate amoebic gill disease (AGD) on Tasmanian salmon farms. We report results of three trials that aimed to reduce AGD prevalence and/or minimise losses associated with AGD. In the first trial, cages were rotated between different sites and data compared to stationary cages that remained on a reference site; this arrangement was repeated over two consecutive years. The second trial studied the effect of prophylactic freshwater bathing, while the third trial considered the effects of sea cage size. All trials evaluated the effect of treatment on AGD prevalence, fish biomass gain, and the percentage of mortalities. No significant reduction of AGD prevalence was detected in terms of Neoparamoeba presence on the gills as measured by the immuno-dot blot assay. However, fish from the rotated cages showed a significant longer period between freshwater baths (P=0.037), and the mean biomass in the rotated cages (P=0.038 in year 1 and P=0.041 in year 2), and the non-prophylactic bathed cages (P=0.048) was significantly higher at the end of the trials. The mortality rate was not affected by any of the treatments. The results of these trials suggest that impact of AGD on salmon industry can be offset by adjustment of husbandry methods. 2004 Elsevier B.V. All rights reserved. Article in Journal/Newspaper Atlantic salmon Salmo salar eCite UTAS (University of Tasmania) Aquaculture 241 1-4 21 30 |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture |
spellingShingle |
Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture Douglas-Helders, GM Weir, IJ O'Brien, DP Carson, J Nowak, BF Effects of husbandry on prevalence of amoebic gill disease and performance of reared Atlantic salmon (Salmo salar L.) |
topic_facet |
Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture |
description |
Improved husbandry has been identified as an area that may alleviate amoebic gill disease (AGD) on Tasmanian salmon farms. We report results of three trials that aimed to reduce AGD prevalence and/or minimise losses associated with AGD. In the first trial, cages were rotated between different sites and data compared to stationary cages that remained on a reference site; this arrangement was repeated over two consecutive years. The second trial studied the effect of prophylactic freshwater bathing, while the third trial considered the effects of sea cage size. All trials evaluated the effect of treatment on AGD prevalence, fish biomass gain, and the percentage of mortalities. No significant reduction of AGD prevalence was detected in terms of Neoparamoeba presence on the gills as measured by the immuno-dot blot assay. However, fish from the rotated cages showed a significant longer period between freshwater baths (P=0.037), and the mean biomass in the rotated cages (P=0.038 in year 1 and P=0.041 in year 2), and the non-prophylactic bathed cages (P=0.048) was significantly higher at the end of the trials. The mortality rate was not affected by any of the treatments. The results of these trials suggest that impact of AGD on salmon industry can be offset by adjustment of husbandry methods. 2004 Elsevier B.V. All rights reserved. |
format |
Article in Journal/Newspaper |
author |
Douglas-Helders, GM Weir, IJ O'Brien, DP Carson, J Nowak, BF |
author_facet |
Douglas-Helders, GM Weir, IJ O'Brien, DP Carson, J Nowak, BF |
author_sort |
Douglas-Helders, GM |
title |
Effects of husbandry on prevalence of amoebic gill disease and performance of reared Atlantic salmon (Salmo salar L.) |
title_short |
Effects of husbandry on prevalence of amoebic gill disease and performance of reared Atlantic salmon (Salmo salar L.) |
title_full |
Effects of husbandry on prevalence of amoebic gill disease and performance of reared Atlantic salmon (Salmo salar L.) |
title_fullStr |
Effects of husbandry on prevalence of amoebic gill disease and performance of reared Atlantic salmon (Salmo salar L.) |
title_full_unstemmed |
Effects of husbandry on prevalence of amoebic gill disease and performance of reared Atlantic salmon (Salmo salar L.) |
title_sort |
effects of husbandry on prevalence of amoebic gill disease and performance of reared atlantic salmon (salmo salar l.) |
publisher |
Elsevier Science |
publishDate |
2004 |
url |
https://doi.org/10.1016/j.aquaculture.2004.07.026 http://ecite.utas.edu.au/30082 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://dx.doi.org/10.1016/j.aquaculture.2004.07.026 Douglas-Helders, GM and Weir, IJ and O'Brien, DP and Carson, J and Nowak, BF, Effects of husbandry on prevalence of amoebic gill disease and performance of reared Atlantic salmon (Salmo salar L.), Aquaculture, 241, (1-4) pp. 21-30. ISSN 0044-8486 (2004) [Refereed Article] http://ecite.utas.edu.au/30082 |
op_doi |
https://doi.org/10.1016/j.aquaculture.2004.07.026 |
container_title |
Aquaculture |
container_volume |
241 |
container_issue |
1-4 |
container_start_page |
21 |
op_container_end_page |
30 |
_version_ |
1766363085916864512 |