A cohort study of gill infections, gill pathology and gill-related mortality in sea-farmed Atlantic salmon (Salmo salar L.): A descriptive analysis.
D. lepeophtherii
AGD
Atlantic salmon
Ca. B. cysticola
SGPV
gill disease
Journal
Journal of fish diseases
ISSN: 1365-2761
Titre abrégé: J Fish Dis
Pays: England
ID NLM: 9881188
Informations de publication
Date de publication:
Sep 2022
Sep 2022
Historique:
revised:
18
05
2022
received:
06
04
2022
accepted:
19
05
2022
pubmed:
17
6
2022
medline:
12
8
2022
entrez:
16
6
2022
Statut:
ppublish
Résumé
Gill disease is an important cause of economic losses, fish mortality and reduced animal welfare in salmonid farming. We performed a prospective cohort study, following groups of Atlantic salmon in Western Norway with repeated sampling and data collection from the hatchery phase and throughout the 1st year at sea. The objective was to determine if variation in pathogen prevalence and load, and zoo- and phytoplankton levels had an impact on gill health. Further to describe the temporal development of pathogen prevalence and load, and gill pathology, and how these relate to each other. Neoparamoeba perurans appeared to be the most important cause of gill pathology. No consistent covariation and no or weak associations between the extent of gill pathology and prevalence and load of SGPV, Ca. B. cysticola and D. lepeophtherii were observed. At sea, D. lepeophtherii and Ca. B. cysticola persistently infected all fish groups. Fish groups negative for SGPV at sea transfer were infected at sea and fish groups tested negative before again testing positive. This is suggestive of horizontal transmission of infection at sea and may indicate that previous SGPV infection does not protect against reinfection. Coinfections with three or more putative gill pathogens were found in all fish groups and appear to be the norm in sea-farmed Atlantic salmon in Western Norway.
Identifiants
pubmed: 35707921
doi: 10.1111/jfd.13662
pmc: PMC9543555
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
1301-1321Subventions
Organisme : Fish Vet Group Norge AS
Organisme : Mowi ASA
Organisme : Pharmaq Analytiq AS
Organisme : Norwegian Seafood Research Fund
ID : 901515
Informations de copyright
© 2022 The Authors. Journal of Fish Diseases published by John Wiley & Sons Ltd.
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