Depth distribution of the amoebic gill disease agent, Neoparamoeba perurans , in salmon sea-cages
Identifying where and when parasites occur in farming environments is vital to understand transmission dynamics and develop preventative measures that reduce host-parasite encounters. A major parasite concern for Atlantic salmon farming is Neoparamoeba perurans , a marine amoeba causing the potentia...
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Online Access: | https://doi.org/10.3354/aei00137 http://ecite.utas.edu.au/101672 |
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ftunivtasecite:oai:ecite.utas.edu.au:101672 2023-05-15T15:31:19+02:00 Depth distribution of the amoebic gill disease agent, Neoparamoeba perurans , in salmon sea-cages Wright, DW Nowak, BF Oppedal, F Bridle, AR Dempster, T 2015 application/pdf https://doi.org/10.3354/aei00137 http://ecite.utas.edu.au/101672 en eng Inter-Research http://ecite.utas.edu.au/101672/1/Wright et al 2015.pdf http://dx.doi.org/10.3354/aei00137 Wright, DW and Nowak, BF and Oppedal, F and Bridle, AR and Dempster, T, Depth distribution of the amoebic gill disease agent, Neoparamoeba perurans , in salmon sea-cages, Aquaculture Environment Interactions, 7, (1) pp. 67-74. ISSN 1869-215X (2015) [Refereed Article] http://ecite.utas.edu.au/101672 Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture Refereed Article PeerReviewed 2015 ftunivtasecite https://doi.org/10.3354/aei00137 2019-12-13T22:03:26Z Identifying where and when parasites occur in farming environments is vital to understand transmission dynamics and develop preventative measures that reduce host-parasite encounters. A major parasite concern for Atlantic salmon farming is Neoparamoeba perurans , a marine amoeba causing the potentially fatal Amoebic Gill Disease (AGD), for which few control options exist. We explored whether free-living N. perurans abundance differs among depths in commercial Atlantic salmon sea-cages. Water samples from the surface to 10 m depth at multiple cage sites and times, collected by a Niskin bottle and subjected to qPCR analysis, revealed N. perurans abundance was influenced by depth at the time of year when amoeba numbers were highest, with more amoebae in surface waters. No distinct depth patterns were observed when amoebae were in low abundance. Across all times, temperature and salinity were largely homogenous throughout cage depths. Possible factors explaining the presence of amoebae at the surface are discussed. Our results suggest excluding caged salmon from upper cage depths where N. perurans is more abundant could be an effective management strategy to reduce the speed at which initial infections occur and delay the development of AGD outbreaks. Article in Journal/Newspaper Atlantic salmon eCite UTAS (University of Tasmania) Aquaculture Environment Interactions 7 1 67 74 |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
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Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture |
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Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture Wright, DW Nowak, BF Oppedal, F Bridle, AR Dempster, T Depth distribution of the amoebic gill disease agent, Neoparamoeba perurans , in salmon sea-cages |
topic_facet |
Agricultural and Veterinary Sciences Fisheries Sciences Aquaculture |
description |
Identifying where and when parasites occur in farming environments is vital to understand transmission dynamics and develop preventative measures that reduce host-parasite encounters. A major parasite concern for Atlantic salmon farming is Neoparamoeba perurans , a marine amoeba causing the potentially fatal Amoebic Gill Disease (AGD), for which few control options exist. We explored whether free-living N. perurans abundance differs among depths in commercial Atlantic salmon sea-cages. Water samples from the surface to 10 m depth at multiple cage sites and times, collected by a Niskin bottle and subjected to qPCR analysis, revealed N. perurans abundance was influenced by depth at the time of year when amoeba numbers were highest, with more amoebae in surface waters. No distinct depth patterns were observed when amoebae were in low abundance. Across all times, temperature and salinity were largely homogenous throughout cage depths. Possible factors explaining the presence of amoebae at the surface are discussed. Our results suggest excluding caged salmon from upper cage depths where N. perurans is more abundant could be an effective management strategy to reduce the speed at which initial infections occur and delay the development of AGD outbreaks. |
format |
Article in Journal/Newspaper |
author |
Wright, DW Nowak, BF Oppedal, F Bridle, AR Dempster, T |
author_facet |
Wright, DW Nowak, BF Oppedal, F Bridle, AR Dempster, T |
author_sort |
Wright, DW |
title |
Depth distribution of the amoebic gill disease agent, Neoparamoeba perurans , in salmon sea-cages |
title_short |
Depth distribution of the amoebic gill disease agent, Neoparamoeba perurans , in salmon sea-cages |
title_full |
Depth distribution of the amoebic gill disease agent, Neoparamoeba perurans , in salmon sea-cages |
title_fullStr |
Depth distribution of the amoebic gill disease agent, Neoparamoeba perurans , in salmon sea-cages |
title_full_unstemmed |
Depth distribution of the amoebic gill disease agent, Neoparamoeba perurans , in salmon sea-cages |
title_sort |
depth distribution of the amoebic gill disease agent, neoparamoeba perurans , in salmon sea-cages |
publisher |
Inter-Research |
publishDate |
2015 |
url |
https://doi.org/10.3354/aei00137 http://ecite.utas.edu.au/101672 |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_relation |
http://ecite.utas.edu.au/101672/1/Wright et al 2015.pdf http://dx.doi.org/10.3354/aei00137 Wright, DW and Nowak, BF and Oppedal, F and Bridle, AR and Dempster, T, Depth distribution of the amoebic gill disease agent, Neoparamoeba perurans , in salmon sea-cages, Aquaculture Environment Interactions, 7, (1) pp. 67-74. ISSN 1869-215X (2015) [Refereed Article] http://ecite.utas.edu.au/101672 |
op_doi |
https://doi.org/10.3354/aei00137 |
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Aquaculture Environment Interactions |
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7 |
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1 |
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67 |
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74 |
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