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 that causes the poten...
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ftdoajarticles:oai:doaj.org/article:ecfa405143884f4291941cccdb1bf9a1 2023-05-15T15:31:25+02:00 Depth distribution of the amoebic gill disease agent, Neoparamoeba perurans, in salmon sea-cages DW Wright B Nowak F Oppedal A Bridle T Dempster 2015-07-01T00:00:00Z https://doi.org/10.3354/aei00137 https://doaj.org/article/ecfa405143884f4291941cccdb1bf9a1 EN eng Inter-Research https://www.int-res.com/abstracts/aei/v7/n1/p67-74/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00137 https://doaj.org/article/ecfa405143884f4291941cccdb1bf9a1 Aquaculture Environment Interactions, Vol 7, Iss 1, Pp 67-74 (2015) Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 article 2015 ftdoajarticles https://doi.org/10.3354/aei00137 2022-12-31T05:22:54Z 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 that causes 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 Salmo salar sea-cages. Water samples collected from the surface to 10 m depth at multiple cage sites and times, and subsequently subjected to qPCR analysis, revealed that 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 homogeneous throughout cage depths. Possible factors explaining the presence of amoebae at the surface are discussed. Our results suggest that 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 Salmo salar Directory of Open Access Journals: DOAJ Articles Aquaculture Environment Interactions 7 1 67 74 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
spellingShingle |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 DW Wright B Nowak F Oppedal A Bridle T Dempster Depth distribution of the amoebic gill disease agent, Neoparamoeba perurans, in salmon sea-cages |
topic_facet |
Aquaculture. Fisheries. Angling SH1-691 Ecology QH540-549.5 |
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 that causes 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 Salmo salar sea-cages. Water samples collected from the surface to 10 m depth at multiple cage sites and times, and subsequently subjected to qPCR analysis, revealed that 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 homogeneous throughout cage depths. Possible factors explaining the presence of amoebae at the surface are discussed. Our results suggest that 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 |
DW Wright B Nowak F Oppedal A Bridle T Dempster |
author_facet |
DW Wright B Nowak F Oppedal A Bridle T Dempster |
author_sort |
DW Wright |
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 https://doaj.org/article/ecfa405143884f4291941cccdb1bf9a1 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Aquaculture Environment Interactions, Vol 7, Iss 1, Pp 67-74 (2015) |
op_relation |
https://www.int-res.com/abstracts/aei/v7/n1/p67-74/ https://doaj.org/toc/1869-215X https://doaj.org/toc/1869-7534 1869-215X 1869-7534 doi:10.3354/aei00137 https://doaj.org/article/ecfa405143884f4291941cccdb1bf9a1 |
op_doi |
https://doi.org/10.3354/aei00137 |
container_title |
Aquaculture Environment Interactions |
container_volume |
7 |
container_issue |
1 |
container_start_page |
67 |
op_container_end_page |
74 |
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1766361919325732864 |