Gyrodactylus marinus infecting the gill filaments of farmed and wild Atlantic cod in Norway
Cod aquaculture is a rapidly expanding industry in Norway and with an increase of biomass in mariculture the concern for diseases spread to and from farmed populations of cod is increasing. The genus Gyrodactylus Nordmann, 1832 are parasitic monogeneans infecting teleost fish in marine and fresh wat...
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Universitetet i Tromsø
2009
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Online Access: | https://hdl.handle.net/10037/29496 |
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ftunivtroemsoe:oai:munin.uit.no:10037/29496 2023-07-16T03:57:23+02:00 Gyrodactylus marinus infecting the gill filaments of farmed and wild Atlantic cod in Norway Haugen, Pål 2009-05 1555455 bytes application/pdf https://hdl.handle.net/10037/29496 eng eng Universitetet i Tromsø University of Tromsø https://hdl.handle.net/10037/29496 Copyright 2009 The Author(s) VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Parasittologi: 484 BIO-3910 Mastergradsoppgave Master thesis 2009 ftunivtroemsoe 2023-06-28T23:06:35Z Cod aquaculture is a rapidly expanding industry in Norway and with an increase of biomass in mariculture the concern for diseases spread to and from farmed populations of cod is increasing. The genus Gyrodactylus Nordmann, 1832 are parasitic monogeneans infecting teleost fish in marine and fresh water habitats worldwide. To investigate a possible problematic species of this genus the gill filaments of Atlantic cod, Gadus morhua L. were examined for parasites. Both farmed and wild caught cod were sampled from Ålesund, Kvarøy, Brønnøysund and Øksfjord Norway. From these samples a total of 48 specimens of Gyrodactylus sp. were investigated through morphological and molecular techniques. The opisthaptoral hard parts from each individual were compared through morphology and measurements and all specimens were found to have a similar morphology. The ITS1 and ITS2 together with the 5.8S subunits from rDNA were compared between the specimens investigated and confirmed the observed morphological homogeneity All species were found to be Gyrodactylus marinus Bychowsky and Poljansky 1953. Furthermore untreated farmed cod have a higher prevalence of G.marinus than what is found in wild cod populations. Master Thesis atlantic cod Brønnøysund Gadus morhua Øksfjord University of Tromsø: Munin Open Research Archive Brønnøysund ENVELOPE(12.213,12.213,65.475,65.475) Norway Øksfjord ENVELOPE(22.351,22.351,70.239,70.239) |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Parasittologi: 484 BIO-3910 |
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VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Parasittologi: 484 BIO-3910 Haugen, Pål Gyrodactylus marinus infecting the gill filaments of farmed and wild Atlantic cod in Norway |
topic_facet |
VDP::Matematikk og naturvitenskap: 400::Zoologiske og botaniske fag: 480::Parasittologi: 484 BIO-3910 |
description |
Cod aquaculture is a rapidly expanding industry in Norway and with an increase of biomass in mariculture the concern for diseases spread to and from farmed populations of cod is increasing. The genus Gyrodactylus Nordmann, 1832 are parasitic monogeneans infecting teleost fish in marine and fresh water habitats worldwide. To investigate a possible problematic species of this genus the gill filaments of Atlantic cod, Gadus morhua L. were examined for parasites. Both farmed and wild caught cod were sampled from Ålesund, Kvarøy, Brønnøysund and Øksfjord Norway. From these samples a total of 48 specimens of Gyrodactylus sp. were investigated through morphological and molecular techniques. The opisthaptoral hard parts from each individual were compared through morphology and measurements and all specimens were found to have a similar morphology. The ITS1 and ITS2 together with the 5.8S subunits from rDNA were compared between the specimens investigated and confirmed the observed morphological homogeneity All species were found to be Gyrodactylus marinus Bychowsky and Poljansky 1953. Furthermore untreated farmed cod have a higher prevalence of G.marinus than what is found in wild cod populations. |
format |
Master Thesis |
author |
Haugen, Pål |
author_facet |
Haugen, Pål |
author_sort |
Haugen, Pål |
title |
Gyrodactylus marinus infecting the gill filaments of farmed and wild Atlantic cod in Norway |
title_short |
Gyrodactylus marinus infecting the gill filaments of farmed and wild Atlantic cod in Norway |
title_full |
Gyrodactylus marinus infecting the gill filaments of farmed and wild Atlantic cod in Norway |
title_fullStr |
Gyrodactylus marinus infecting the gill filaments of farmed and wild Atlantic cod in Norway |
title_full_unstemmed |
Gyrodactylus marinus infecting the gill filaments of farmed and wild Atlantic cod in Norway |
title_sort |
gyrodactylus marinus infecting the gill filaments of farmed and wild atlantic cod in norway |
publisher |
Universitetet i Tromsø |
publishDate |
2009 |
url |
https://hdl.handle.net/10037/29496 |
long_lat |
ENVELOPE(12.213,12.213,65.475,65.475) ENVELOPE(22.351,22.351,70.239,70.239) |
geographic |
Brønnøysund Norway Øksfjord |
geographic_facet |
Brønnøysund Norway Øksfjord |
genre |
atlantic cod Brønnøysund Gadus morhua Øksfjord |
genre_facet |
atlantic cod Brønnøysund Gadus morhua Øksfjord |
op_relation |
https://hdl.handle.net/10037/29496 |
op_rights |
Copyright 2009 The Author(s) |
_version_ |
1771543965052436480 |