Repeated sublethal freshwater exposures reduce the amoebic gill disease parasite, Neoparamoeba perurans , on Atlantic salmon
Freshwater bathing is one of the main treatment options available against amoebic gill disease (AGD) affecting multiple fish hosts in mariculture systems. Prevailing freshwater treatments are designed to be long enough to kill Neoparamoeba perurans , the ectoparasite causing AGD, which may select fo...
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Blackwell Publishing Ltd
2018
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Online Access: | https://doi.org/10.1111/jfd.12834 http://www.ncbi.nlm.nih.gov/pubmed/29938799 http://ecite.utas.edu.au/129951 |
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ftunivtasecite:oai:ecite.utas.edu.au:129951 2023-05-15T15:31:19+02:00 Repeated sublethal freshwater exposures reduce the amoebic gill disease parasite, Neoparamoeba perurans , on Atlantic salmon Wright, DW Nowak, B Oppedal, F Crosbie, P Stien, LH Dempster, T 2018 https://doi.org/10.1111/jfd.12834 http://www.ncbi.nlm.nih.gov/pubmed/29938799 http://ecite.utas.edu.au/129951 en eng Blackwell Publishing Ltd http://dx.doi.org/10.1111/jfd.12834 Wright, DW and Nowak, B and Oppedal, F and Crosbie, P and Stien, LH and Dempster, T, Repeated sublethal freshwater exposures reduce the amoebic gill disease parasite, Neoparamoeba perurans , on Atlantic salmon, Journal of Fish Diseases, 41, (9) pp. 1403-1410. ISSN 0140-7775 (2018) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/29938799 http://ecite.utas.edu.au/129951 Agricultural and Veterinary Sciences Fisheries Sciences Fish Pests and Diseases Refereed Article PeerReviewed 2018 ftunivtasecite https://doi.org/10.1111/jfd.12834 2019-12-14T07:05:00Z Freshwater bathing is one of the main treatment options available against amoebic gill disease (AGD) affecting multiple fish hosts in mariculture systems. Prevailing freshwater treatments are designed to be long enough to kill Neoparamoeba perurans , the ectoparasite causing AGD, which may select for freshwater tolerance. Here, we tested whether using shorter, sublethal freshwater treatment durations are a viable alternative to lethal ones for N.perurans (24hr). Under invitro conditions, gill‐isolated N.perurans attached to plastic substrate in sea water lifted off after ≥2min in freshwater, but survival was not impacted until 60min. In an invivo experiment, AGD‐affected Atlantic salmon Salmo salar subjected daily to 30min (sublethal to N.perurans ) and 120min (lethal to N.perurans ) freshwater treatments for 6days consistently reduced N.perurans cell numbers on gills (based on qPCR analysis) compared to daily 3min freshwater or seawater treatments for 6days. Our results suggest that targeting cell detachment rather than cell death with repeated freshwater treatments of shorter duration than typical baths could be used in AGD management. However, the consequences of modifying the intensity of freshwater treatment regimes on freshwater tolerance evolution in N.perurans populations require careful consideration. Article in Journal/Newspaper Atlantic salmon Salmo salar eCite UTAS (University of Tasmania) Journal of Fish Diseases 41 9 1403 1410 |
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eCite UTAS (University of Tasmania) |
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ftunivtasecite |
language |
English |
topic |
Agricultural and Veterinary Sciences Fisheries Sciences Fish Pests and Diseases |
spellingShingle |
Agricultural and Veterinary Sciences Fisheries Sciences Fish Pests and Diseases Wright, DW Nowak, B Oppedal, F Crosbie, P Stien, LH Dempster, T Repeated sublethal freshwater exposures reduce the amoebic gill disease parasite, Neoparamoeba perurans , on Atlantic salmon |
topic_facet |
Agricultural and Veterinary Sciences Fisheries Sciences Fish Pests and Diseases |
description |
Freshwater bathing is one of the main treatment options available against amoebic gill disease (AGD) affecting multiple fish hosts in mariculture systems. Prevailing freshwater treatments are designed to be long enough to kill Neoparamoeba perurans , the ectoparasite causing AGD, which may select for freshwater tolerance. Here, we tested whether using shorter, sublethal freshwater treatment durations are a viable alternative to lethal ones for N.perurans (24hr). Under invitro conditions, gill‐isolated N.perurans attached to plastic substrate in sea water lifted off after ≥2min in freshwater, but survival was not impacted until 60min. In an invivo experiment, AGD‐affected Atlantic salmon Salmo salar subjected daily to 30min (sublethal to N.perurans ) and 120min (lethal to N.perurans ) freshwater treatments for 6days consistently reduced N.perurans cell numbers on gills (based on qPCR analysis) compared to daily 3min freshwater or seawater treatments for 6days. Our results suggest that targeting cell detachment rather than cell death with repeated freshwater treatments of shorter duration than typical baths could be used in AGD management. However, the consequences of modifying the intensity of freshwater treatment regimes on freshwater tolerance evolution in N.perurans populations require careful consideration. |
format |
Article in Journal/Newspaper |
author |
Wright, DW Nowak, B Oppedal, F Crosbie, P Stien, LH Dempster, T |
author_facet |
Wright, DW Nowak, B Oppedal, F Crosbie, P Stien, LH Dempster, T |
author_sort |
Wright, DW |
title |
Repeated sublethal freshwater exposures reduce the amoebic gill disease parasite, Neoparamoeba perurans , on Atlantic salmon |
title_short |
Repeated sublethal freshwater exposures reduce the amoebic gill disease parasite, Neoparamoeba perurans , on Atlantic salmon |
title_full |
Repeated sublethal freshwater exposures reduce the amoebic gill disease parasite, Neoparamoeba perurans , on Atlantic salmon |
title_fullStr |
Repeated sublethal freshwater exposures reduce the amoebic gill disease parasite, Neoparamoeba perurans , on Atlantic salmon |
title_full_unstemmed |
Repeated sublethal freshwater exposures reduce the amoebic gill disease parasite, Neoparamoeba perurans , on Atlantic salmon |
title_sort |
repeated sublethal freshwater exposures reduce the amoebic gill disease parasite, neoparamoeba perurans , on atlantic salmon |
publisher |
Blackwell Publishing Ltd |
publishDate |
2018 |
url |
https://doi.org/10.1111/jfd.12834 http://www.ncbi.nlm.nih.gov/pubmed/29938799 http://ecite.utas.edu.au/129951 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
http://dx.doi.org/10.1111/jfd.12834 Wright, DW and Nowak, B and Oppedal, F and Crosbie, P and Stien, LH and Dempster, T, Repeated sublethal freshwater exposures reduce the amoebic gill disease parasite, Neoparamoeba perurans , on Atlantic salmon, Journal of Fish Diseases, 41, (9) pp. 1403-1410. ISSN 0140-7775 (2018) [Refereed Article] http://www.ncbi.nlm.nih.gov/pubmed/29938799 http://ecite.utas.edu.au/129951 |
op_doi |
https://doi.org/10.1111/jfd.12834 |
container_title |
Journal of Fish Diseases |
container_volume |
41 |
container_issue |
9 |
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1403 |
op_container_end_page |
1410 |
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1766361807329427456 |