Working Group on Pathology and Diseases of Marine Organisms (WGPDMO)

• Main Authors: Axén, Charlotte, Carnegie, Ryan, Cheslett, Deborah, Eriksson-Kallio, Ana Maria, Grade, Ana, Haenen, Olga, Kristmundsson, Arni, Kvamme, Bjorn Olav, Levsen, Arne, Lillehaug, Atle, Madsen, Lone, Medne, Ruta, Munro, Eann, Paley, Richard, Pires, Daniel, Podolska, Magdalena, Ramos, Paula, Renault, Tristan, Ruane, Neil M, Ruano, Francisco, Soares, Florbela, Scharsack, Jörn
• Format: Book
• Language: English
• Published: International Council for the Exploration of the Sea (ICES) 2020
• Subjects: /dk/atira/pure/sustainabledevelopmentgoals/life_below_water; SDG 14 - Life Below Water; Pacific; Norway; Atlantic salmon; Iceland; Pacific oyster; Pink salmon
• Online Access: https://orbit.dtu.dk/en/publications/bd5b1866-9a8c-44e7-a7ac-57bb276afb95; https://doi.org/10.17895/ices.pub.6086; https://backend.orbit.dtu.dk/ws/files/236616974/WGPDMO_Report_2020.pdf

The Working Group on Pathology and Diseases of Marine Organisms (WGPDMO) investigates diseases and pathology in wild and farmed finfish, shellfish and crustaceans. This report describes new disease trends in wild and farmed fish and shellfish in the ICES area, based on national reports from fourteen member countries. Notable reports for wild fish included a widening geographic scope of the enigmatic “red skin disease” in wild Atlantic salmon, with reports now from Norway, Scotland and Ireland as well as the Baltic Sea countries where it was originally observed; increased prevalences of Ichthyophonus sp. infection in herring from Iceland and mackerel from Norway, suggesting potentially increased affects of this pathogen on wild fish in the north; and the first detection of eel rhabdovirus (EVEX) in England and Wales since the 1980s. Detection of piscine orthoreovirus (PRV) in exotic pink salmon straying from cultivation in Russian rivers to Norway raised questions about potential disease interactions between pink salmon and farmed Atlantic salmon that deserve further attention. Reports of diseases in farmed fish included the first detections of infectious pancreatic necrosis virus (IPNV, pathogenic genogroup 5) and Parvicapsula pseudobranchicola in Atlantic salmon from Iceland, increased detection of Pasteurella skyensis in Atlantic salmon in Scotland, and increased detection of furunculosis caused by Aeromonas salmonicida in Atlantic salmon from Ireland. Sea lice parasitism and complex gill disease (CGD) remain highly significant concerns for Atlantic salmon aquaculture, with reports for 2019 noting increasing prevalences and impacts of both. Notable reports of diseases for shellfish included an outbreak of Haplosporidium costale in cultured Pacific oysters in France; mortality caused by Vibrio aestuarianus in cultured Pacific oysters in Scotland and Ireland, with additional and unusual detection of bacteria belonging to the Vibrio splendidus clade in association with Pacific oyster mortality in Ireland; ...