The ultrastructure of hypersymbionts on the monogenean Gyrodactylus salaris infecting Atlantic salmon Salmo salar
There is increasing pressure to develop alternative control strategies against the pathogen Gyrodactylus salaris, which has devastated wild Atlantic salmon Salmo salar in Norway. Hyperparasitism is one option for biological control and electron microscopy has revealed two ectosymbionts associated wi...
Published in: | Journal of Helminthology |
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Cambridge University Press
2006
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Online Access: | https://orca.cardiff.ac.uk/id/eprint/61864/ https://doi.org/10.1017/JOH2006368 |
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:61864 2023-05-15T15:31:32+02:00 The ultrastructure of hypersymbionts on the monogenean Gyrodactylus salaris infecting Atlantic salmon Salmo salar Bakke, Tor A. Cable, Joanne Østbø, M. 2006 https://orca.cardiff.ac.uk/id/eprint/61864/ https://doi.org/10.1017/JOH2006368 unknown Cambridge University Press Bakke, Tor A., Cable, Joanne https://orca.cardiff.ac.uk/view/cardiffauthors/A042952A.html orcid:0000-0002-8510-7055 orcid:0000-0002-8510-7055 and Østbø, M. 2006. The ultrastructure of hypersymbionts on the monogenean Gyrodactylus salaris infecting Atlantic salmon Salmo salar. Journal of Helminthology 80 (4) , pp. 377-386. 10.1017/JOH2006368 https://doi.org/10.1017/JOH2006368 doi:10.1017/JOH2006368 QL Zoology Article PeerReviewed 2006 ftunivcardiff https://doi.org/10.1017/JOH2006368 2022-10-27T22:39:23Z There is increasing pressure to develop alternative control strategies against the pathogen Gyrodactylus salaris, which has devastated wild Atlantic salmon Salmo salar in Norway. Hyperparasitism is one option for biological control and electron microscopy has revealed two ectosymbionts associated with G. salaris: unidentified rod-shaped bacteria, and the protist, Ichthyobodo necator. No endosymbionts were detected. The flagellate I. necator occurred only occasionally on fish suffering costiosis, whereas bacterial infections on the tegument of G. salaris were observed throughout the year, but at variable densities. Bacteria were seldom observed attached to fish epidermis, even when individuals of G. salaris on the same host were heavily infected. Wounds on salmon epidermis caused by the feeding activity of bacteria-infected G. salaris did not appear to be infected with bacteria. On heavily infected gyrodactylids, bacteria were most abundant anteriorly on the cephalic lobes, including the sensory structures, but no damaged tissue was detected by transmission electron microscopy in the region of bacterial adherence. Furthermore, transmission and survival of infected G. salaris on wild salmon did not appear to be influenced by the bacterial infection. The lack of structural damage and impact on G. salaris biology indicates that these bacteria are not a potential agent for control of gyrodactylosis. However, this may not be the case for all gyrodactylid–bacterial interactions and a review of bacterial infections of platyhelminths is presented. Article in Journal/Newspaper Atlantic salmon Salmo salar Cardiff University: ORCA (Online Research @ Cardiff) Norway Journal of Helminthology 80 4 377 386 |
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Open Polar |
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Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
unknown |
topic |
QL Zoology |
spellingShingle |
QL Zoology Bakke, Tor A. Cable, Joanne Østbø, M. The ultrastructure of hypersymbionts on the monogenean Gyrodactylus salaris infecting Atlantic salmon Salmo salar |
topic_facet |
QL Zoology |
description |
There is increasing pressure to develop alternative control strategies against the pathogen Gyrodactylus salaris, which has devastated wild Atlantic salmon Salmo salar in Norway. Hyperparasitism is one option for biological control and electron microscopy has revealed two ectosymbionts associated with G. salaris: unidentified rod-shaped bacteria, and the protist, Ichthyobodo necator. No endosymbionts were detected. The flagellate I. necator occurred only occasionally on fish suffering costiosis, whereas bacterial infections on the tegument of G. salaris were observed throughout the year, but at variable densities. Bacteria were seldom observed attached to fish epidermis, even when individuals of G. salaris on the same host were heavily infected. Wounds on salmon epidermis caused by the feeding activity of bacteria-infected G. salaris did not appear to be infected with bacteria. On heavily infected gyrodactylids, bacteria were most abundant anteriorly on the cephalic lobes, including the sensory structures, but no damaged tissue was detected by transmission electron microscopy in the region of bacterial adherence. Furthermore, transmission and survival of infected G. salaris on wild salmon did not appear to be influenced by the bacterial infection. The lack of structural damage and impact on G. salaris biology indicates that these bacteria are not a potential agent for control of gyrodactylosis. However, this may not be the case for all gyrodactylid–bacterial interactions and a review of bacterial infections of platyhelminths is presented. |
format |
Article in Journal/Newspaper |
author |
Bakke, Tor A. Cable, Joanne Østbø, M. |
author_facet |
Bakke, Tor A. Cable, Joanne Østbø, M. |
author_sort |
Bakke, Tor A. |
title |
The ultrastructure of hypersymbionts on the monogenean Gyrodactylus salaris infecting Atlantic salmon Salmo salar |
title_short |
The ultrastructure of hypersymbionts on the monogenean Gyrodactylus salaris infecting Atlantic salmon Salmo salar |
title_full |
The ultrastructure of hypersymbionts on the monogenean Gyrodactylus salaris infecting Atlantic salmon Salmo salar |
title_fullStr |
The ultrastructure of hypersymbionts on the monogenean Gyrodactylus salaris infecting Atlantic salmon Salmo salar |
title_full_unstemmed |
The ultrastructure of hypersymbionts on the monogenean Gyrodactylus salaris infecting Atlantic salmon Salmo salar |
title_sort |
ultrastructure of hypersymbionts on the monogenean gyrodactylus salaris infecting atlantic salmon salmo salar |
publisher |
Cambridge University Press |
publishDate |
2006 |
url |
https://orca.cardiff.ac.uk/id/eprint/61864/ https://doi.org/10.1017/JOH2006368 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_relation |
Bakke, Tor A., Cable, Joanne https://orca.cardiff.ac.uk/view/cardiffauthors/A042952A.html orcid:0000-0002-8510-7055 orcid:0000-0002-8510-7055 and Østbø, M. 2006. The ultrastructure of hypersymbionts on the monogenean Gyrodactylus salaris infecting Atlantic salmon Salmo salar. Journal of Helminthology 80 (4) , pp. 377-386. 10.1017/JOH2006368 https://doi.org/10.1017/JOH2006368 doi:10.1017/JOH2006368 |
op_doi |
https://doi.org/10.1017/JOH2006368 |
container_title |
Journal of Helminthology |
container_volume |
80 |
container_issue |
4 |
container_start_page |
377 |
op_container_end_page |
386 |
_version_ |
1766362057184116736 |