1. agentaqua

    agentaqua Well-Known Member

  2. agentaqua

    agentaqua Well-Known Member

  3. agentaqua

    agentaqua Well-Known Member

  4. wildmanyeah

    wildmanyeah Well-Known Member

    look who googled fish farms this morning
     
    SpringFever552 likes this.
  5. agentaqua

    agentaqua Well-Known Member

  6. california

    california Well-Known Member

    Yes, thanks for taking the time to research this topic and post relevant articles AA!
     
    wildmanyeah likes this.
  7. fogged in

    fogged in Well-Known Member

    Just gota say this!!!
    Wildman...your posts are SO OFTEN off topic, and of no relevance to the thread...like this one.
    If you are referring to Agentaqua in your recent post above made this morning, what is your point????
    ....you need to follow his lead and post more information of value directed to the thread or just don't post!!!!
     
    Last edited: Mar 9, 2018
  8. Admin

    Admin Admin Staff Member

    Here is a copy and paste from the Hunting thread...applies here too.

    Ah...a conservation thread gone sideways...shocking. Once again, here is the reminder to keep the personal crap out of your posts. Cleaned up a couple posts and left a couple others for context. Don't like someone's point of view, debate it all you want. Get personal and disrespectful and it will be yanked from the thread or the thread will get shut down.
     
  9. wildmanyeah

    wildmanyeah Well-Known Member

  10. agentaqua

    agentaqua Well-Known Member

    Molecular testing of adult Pacific salmon and trout (Oncorhynchus spp.) for several RNA viruses demonstrates widespread distribution of piscine orthoreovirus in Alaska and Washington
    Authors
    • M K Purcell,


    • R L Powers,
    • J Evered,
    • J Kerwin,
    • T R Meyers,
    • B Stewart,
    • J R Winton
    Abstract
    This research was initiated in conjunction with a systematic, multiagency surveillance effort in the United States (U.S.) in response to reported findings of infectious salmon anaemia virus (ISAV) RNA in British Columbia, Canada. In the systematic surveillance study reported in a companion paper, tissues from various salmonids taken from Washington and Alaska were surveyed for ISAV RNA using the U.S.-approved diagnostic method, and samples were released for use in this present study only after testing negative. Here, we tested a subset of these samples for ISAV RNA with three additional published molecular assays, as well as for RNA from salmonid alphavirus (SAV), piscine myocarditis virus (PMCV) and piscine orthoreovirus (PRV). All samples (n = 2,252; 121 stock cohorts) tested negative for RNA from ISAV, PMCV, and SAV. In contrast, there were 25 stock cohorts from Washington and Alaska that had one or more individuals test positive for PRV RNA; prevalence within stocks varied and ranged from 2% to 73%. The overall prevalence of PRV RNA-positive individuals across the study was 3.4% (77 of 2,252 fish tested). Findings of PRV RNA were most common in coho (Oncorhynchus kisutch Walbaum) and Chinook (O. tshawytscha Walbaum) salmon.
    http://onlinelibrary.wiley.com/doi/10.1111/jfd.12740/abstract
     
  11. wildmanyeah

    wildmanyeah Well-Known Member

    https://www.dnr.wa.gov/sites/default/files/publications/PRV whitepaper revised Sept 2017.pdf?3c0h5&b2f0s02j4i

    Prepared By
    The Pacific Northwest Fish Health Protection Committee
    By
    T.R. Meyers

    Alaska Department of Fish and Game
    Juneau Fish Pathology Laboratory

    Summary Conclusion Based on Available Data: The ubiquitous nature of piscine orthoreovirus (PRV), its apparent historic presence in wild Pacific salmonid stocks in the Pacific Northwest and the lack of clear association with disease in Pacific
    salmonids suggest the virus poses a low risk to wild species of Pacific salmonids.

    Why PRV in the PNW is of low risk regarding HSMI in wild Pacific Salmonids

    1. The disease “heart and skeletal muscle inflammation” (HSMI) has not been reported in wild
    salmon populations in Norway or elsewhere and appears to only be a threat to farmed fish
    2. While PRV causes HSMI in farmed Norwegian Atlantic salmon, high levels of PRV genetic
    material have been detected in asymptomatic wild and cultured salmonids with no evidence of
    HSMI disease
    3. Histopathological lesions of HSMI were recently described as statistically correlated with the
    presence of PRV at one Atlantic salmon farm in British Columbia, Canada (BC) while other
    studies have detected the presence of PRV genetic material in wild and cultured Chinook, coho
    and pink salmon and steelhead trout from Washington State, BC and Alaska where years of
    surveillance have reported no presence of HSMI
    4. Molecular testing of archived fish tissues in BC has shown that PRV was present in
    asymptomatic wild and farmed Pacific salmon since 1987 and may have been present as early as
    1977 before Atlantic salmon were imported for aquaculture
    5. HSMI has not been reported in Pacific salmon or steelhead in North America to date
    6. Laboratory studies with Chinook and sockeye salmon have demonstrated that PRV is infectious
    and will persist for quite some time but does not cause fish mortality, HSMI, or any other
    apparent disease
    7. Development of HSMI and HSMI-like diseases of farmed salmonids (Atlantic and coho
    salmon; rainbow trout) infected by PRV may be a result of different viral strains, host specific
    antiviral responses and environmental stressors that do not appear to be present or active for
    indigenous salmon on the Pacific Coast
    8. The presence of PRV genetic material in Pacific salmon tissues is not sufficient evidence
    for HSMI disease

    The PRV strain present in indigenous Pacific salmon in the PNW, historically and experimentally, appears to be relatively benign and unable to produce significant disease or HSMI in native salmonids.
     
    Last edited: Mar 13, 2018
  12. OldBlackDog

    OldBlackDog Well-Known Member

  13. fogged in

    fogged in Well-Known Member


    This story ran in newspapers across the country yesterday and today...more bad PR for Fish Farms.
    "B.C. First Nation in federal court in bid to halt fish farm restocking
    The Namgis First Nation of Alert Bay says prior to any fish transfer to an open-net pen at nearby Swanson Island, the Atlantic salmon smolts should be tested for the blood virus piscine reovirus."
    http://business.financialpost.com/p...ral-court-in-bid-to-halt-fish-farm-restocking


    Not an unreasonable request that these smolts be tested for disease is it???
    But, I do recall a reliable source stating a very high percentage of Atlantic Salmon smolts are infected with PVR when released, but in the past our Government and DFO have not objected, perhaps because it is difficult or even impossible for Fish Farms to survive if they can't stock with diseased smolts.
     
    trophywife likes this.
  14. wildmanyeah

    wildmanyeah Well-Known Member

    Do hatcheries have to test their smolts before they transfer or release them for diseases like PRV?

    Do our hatchery have the funds to bear these costs?
     
  15. fogged in

    fogged in Well-Known Member

    I know of no B.C. hatcheries who import Atlantic Salmon.
     
  16. bones

    bones Well-Known Member

    So then were do all these as you put it, diseased smolts come from? Curious?
     
  17. fogged in

    fogged in Well-Known Member


    The story I posted stated " prior to any fish transfer to an open-net pen at nearby Swanson Island, the Atlantic salmon smolts should be tested for the blood virus piscine reovirus."
    Where exactly the diseased Atlantic Salmon smolts are transferred from is not the issue.
     
  18. wildmanyeah

    wildmanyeah Well-Known Member

    I'm not sure you understand what they are asking for

    They are asking for the government to create regulation to test smolts when they are going to be transferred or released for PRV. I am not sure if you did not read the conclusions that the alaskan scientist have come to about PRV but you should probably refresh on that.

    "Molecular testing of archived fish tissues in BC has shown that PRV was present in asymptomatic wild and farmed Pacific salmon since 1987 and may have been present as early as 1977 before Atlantic salmon were imported for aquaculture"

    Why should our hatcheries be exempt from testing for a virus that exists in our wild and hatchery stocks?
     
  19. OldBlackDog

    OldBlackDog Well-Known Member

  20. Dave

    Dave Well-Known Member

    Only cost $100,000 to prove what most knew.
     

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