Environmental DNA (eDNA) monitoring of two different freshwater host-pathogen complexes in the interface between nature and aquaculture
Environmental DNA (eDNA) monitoring methods are increasingly used as a supplement or substitute to conventional monitoring. This rapidly advancing research field promises improvements for aquatic species conservation and the detection of invasive species and pathogens. The eDNA dynamics of some grou...
Published in: | Journal of Applied Ecology |
---|---|
Main Author: | |
Format: | Doctoral or Postdoctoral Thesis |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | http://hdl.handle.net/10852/97860 |
id |
ftoslouniv:oai:www.duo.uio.no:10852/97860 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
Environmental DNA (eDNA) monitoring methods are increasingly used as a supplement or substitute to conventional monitoring. This rapidly advancing research field promises improvements for aquatic species conservation and the detection of invasive species and pathogens. The eDNA dynamics of some groups of organisms like fish have been extensively studied, in particular fish of commercial interest or where there is a high invasive potential. However, there are still many knowledge gaps on eDNA dynamics and monitoring potential for rare and elusive species, and for host-pathogen complexes. The overarching goal of this thesis was to explore, develop and evaluate the potential of targeted eDNA detection and quantification as surveillance and biosecurity tool both in nature and aquaculture. For this purpose, we chose two dissimilar host-pathogen complexes, which are of economic importance and relevance regarding species conservation: The Atlantic salmon and the salmonid parasite Gyrodactylus salaris and freshwater crayfish with their obligate parasite Aphanomyces astaci. The salmon fluke G. salaris has caused significant damage to indigenous Atlantic salmon populations in Norway, and the Norwegian Government is working towards the eradication of this parasite. The oomycete A. astaci, carried and transmitted by American freshwater crayfish species, causes crayfish plague and is the largest threat to endangered European crayfish species, and is registered as a list 3 disease (national disease) in Norway. The same applies for G. salaris. In these host-pathogen complexes, fish shed much larger amounts of eDNA than crayfish as they are covered with a mucus layer. Conversely, the sporulating oomycete A. astaci is readily detectable using the eDNA methodology while the flatworm G. salaris assumingly only shed minute amounts of eDNA. Three main research questions were asked: 1) Can the eDNA methodology work equally well or better than conventional methods for biomonitoring of the host-pathogen models, particularly at low ... |
format |
Doctoral or Postdoctoral Thesis |
author |
Rusch, Johannes C. |
spellingShingle |
Rusch, Johannes C. Environmental DNA (eDNA) monitoring of two different freshwater host-pathogen complexes in the interface between nature and aquaculture |
author_facet |
Rusch, Johannes C. |
author_sort |
Rusch, Johannes C. |
title |
Environmental DNA (eDNA) monitoring of two different freshwater host-pathogen complexes in the interface between nature and aquaculture |
title_short |
Environmental DNA (eDNA) monitoring of two different freshwater host-pathogen complexes in the interface between nature and aquaculture |
title_full |
Environmental DNA (eDNA) monitoring of two different freshwater host-pathogen complexes in the interface between nature and aquaculture |
title_fullStr |
Environmental DNA (eDNA) monitoring of two different freshwater host-pathogen complexes in the interface between nature and aquaculture |
title_full_unstemmed |
Environmental DNA (eDNA) monitoring of two different freshwater host-pathogen complexes in the interface between nature and aquaculture |
title_sort |
environmental dna (edna) monitoring of two different freshwater host-pathogen complexes in the interface between nature and aquaculture |
publishDate |
2021 |
url |
http://hdl.handle.net/10852/97860 |
geographic |
Norway |
geographic_facet |
Norway |
genre |
Atlantic salmon |
genre_facet |
Atlantic salmon |
op_relation |
I. Rusch JC, Hansen H, Strand DA, Markussen T, Hytterød S, Vrålstad T (2018). Catching the fish with the worm: a case study on eDNA detection of the monogenean parasite Gyrodactylus salaris and two of its hosts, Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss). Parasites & Vectors 11. The article is included in the thesis. Also available at: https://doi.org/10.1186/s13071-018-2916-3 II. Strand DA, Johnsen SI, Rusch JC, Agersnap S, Larsen WB, Knudsen SW, Møller PR, Vrålstad T (2019). Monitoring a Norwegian freshwater crayfish tragedy: eDNA snapshots of invasion, infection and extinction. Journal of Applied Ecology 56: 1661–1673. The article is included in the thesis. Also available at: https://doi.org/10.1111/1365-2664.13404 III. Rusch JC, Mojžišová M, Strand DA, Svobodová J, Vrålstad T, Petrusek A (2020). Simultaneous detection of native crayfish and invasive crayfish and Aphanomyces astaci from environmental DNA in a wide range of habitats in Central Europe. NeoBiota 58: 1-32. The article is included in the thesis. Also available at: https://doi.org/10.3897/neobiota.58.49358 IV. Rusch JC, Strand DA, Andersen T, Vrålstad T, Hansen H. Environmental DNA (eDNA) dynamics of the host-ectoparasite complex Atlantic salmon and Gyrodactylus salaris under experimental conditions. To be published. The paper is not available in DUO awaiting publishing. V. Rusch JC, Laurendz C, Strand DA, Johnsen SI, Edsman L, Andersen T, Vrålstad T. Exploring the eDNA dynamics of the host-pathogen pair Pacifastacus leniusculus and Aphanomyces astaci under experimental conditions. To be published. The paper is not available in DUO awaiting publishing. https://doi.org/10.1186/s13071-018-2916-3 https://doi.org/10.1111/1365-2664.13404 https://doi.org/10.3897/neobiota.58.49358 http://hdl.handle.net/10852/97860 |
op_doi |
https://doi.org/10.1111/1365-2664.13404 https://doi.org/10.3897/neobiota.58.49358 https://doi.org/10.1186/s13071-018-2916-3 |
container_title |
Journal of Applied Ecology |
container_volume |
56 |
container_issue |
7 |
container_start_page |
1661 |
op_container_end_page |
1673 |
_version_ |
1766362489697599488 |
spelling |
ftoslouniv:oai:www.duo.uio.no:10852/97860 2023-05-15T15:32:00+02:00 Environmental DNA (eDNA) monitoring of two different freshwater host-pathogen complexes in the interface between nature and aquaculture Rusch, Johannes C. 2021 http://hdl.handle.net/10852/97860 en eng I. Rusch JC, Hansen H, Strand DA, Markussen T, Hytterød S, Vrålstad T (2018). Catching the fish with the worm: a case study on eDNA detection of the monogenean parasite Gyrodactylus salaris and two of its hosts, Atlantic salmon (Salmo salar) and rainbow trout (Oncorhynchus mykiss). Parasites & Vectors 11. The article is included in the thesis. Also available at: https://doi.org/10.1186/s13071-018-2916-3 II. Strand DA, Johnsen SI, Rusch JC, Agersnap S, Larsen WB, Knudsen SW, Møller PR, Vrålstad T (2019). Monitoring a Norwegian freshwater crayfish tragedy: eDNA snapshots of invasion, infection and extinction. Journal of Applied Ecology 56: 1661–1673. The article is included in the thesis. Also available at: https://doi.org/10.1111/1365-2664.13404 III. Rusch JC, Mojžišová M, Strand DA, Svobodová J, Vrålstad T, Petrusek A (2020). Simultaneous detection of native crayfish and invasive crayfish and Aphanomyces astaci from environmental DNA in a wide range of habitats in Central Europe. NeoBiota 58: 1-32. The article is included in the thesis. Also available at: https://doi.org/10.3897/neobiota.58.49358 IV. Rusch JC, Strand DA, Andersen T, Vrålstad T, Hansen H. Environmental DNA (eDNA) dynamics of the host-ectoparasite complex Atlantic salmon and Gyrodactylus salaris under experimental conditions. To be published. The paper is not available in DUO awaiting publishing. V. Rusch JC, Laurendz C, Strand DA, Johnsen SI, Edsman L, Andersen T, Vrålstad T. Exploring the eDNA dynamics of the host-pathogen pair Pacifastacus leniusculus and Aphanomyces astaci under experimental conditions. To be published. The paper is not available in DUO awaiting publishing. https://doi.org/10.1186/s13071-018-2916-3 https://doi.org/10.1111/1365-2664.13404 https://doi.org/10.3897/neobiota.58.49358 http://hdl.handle.net/10852/97860 Doctoral thesis Doktoravhandling 2021 ftoslouniv https://doi.org/10.1111/1365-2664.13404 https://doi.org/10.3897/neobiota.58.49358 https://doi.org/10.1186/s13071-018-2916-3 2022-12-07T23:36:11Z Environmental DNA (eDNA) monitoring methods are increasingly used as a supplement or substitute to conventional monitoring. This rapidly advancing research field promises improvements for aquatic species conservation and the detection of invasive species and pathogens. The eDNA dynamics of some groups of organisms like fish have been extensively studied, in particular fish of commercial interest or where there is a high invasive potential. However, there are still many knowledge gaps on eDNA dynamics and monitoring potential for rare and elusive species, and for host-pathogen complexes. The overarching goal of this thesis was to explore, develop and evaluate the potential of targeted eDNA detection and quantification as surveillance and biosecurity tool both in nature and aquaculture. For this purpose, we chose two dissimilar host-pathogen complexes, which are of economic importance and relevance regarding species conservation: The Atlantic salmon and the salmonid parasite Gyrodactylus salaris and freshwater crayfish with their obligate parasite Aphanomyces astaci. The salmon fluke G. salaris has caused significant damage to indigenous Atlantic salmon populations in Norway, and the Norwegian Government is working towards the eradication of this parasite. The oomycete A. astaci, carried and transmitted by American freshwater crayfish species, causes crayfish plague and is the largest threat to endangered European crayfish species, and is registered as a list 3 disease (national disease) in Norway. The same applies for G. salaris. In these host-pathogen complexes, fish shed much larger amounts of eDNA than crayfish as they are covered with a mucus layer. Conversely, the sporulating oomycete A. astaci is readily detectable using the eDNA methodology while the flatworm G. salaris assumingly only shed minute amounts of eDNA. Three main research questions were asked: 1) Can the eDNA methodology work equally well or better than conventional methods for biomonitoring of the host-pathogen models, particularly at low ... Doctoral or Postdoctoral Thesis Atlantic salmon Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Norway Journal of Applied Ecology 56 7 1661 1673 |