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Pathogen Screening of Naturally Produced Yakima River Spring Chinook Smolts

This project was designed to evaluate whether introduction of   intensively reared hatchery produced smolts would impact the  prevalence of specific pathogens in the naturally produced spring   chinook smolts. Increases in prevalence of any of these pathogens   could negatively impact the survival of these fish. Approximately   2   smolts were collected at the Chandler smolt collection  facility on the lower Yakima River during 1998, 2    and 2  1 and   13  smolts were collected in 2  2 for monitoring for specific   pathogens. The pathogens monitored were infectious hematopoeitic   necrosis virus, infectious pancreatic necrosis virus, viral  hemorrhagic septicemia, Flavobacterium psychrophilum, Flavobacterium   columnare, Aeromonas salmonicida, Yersinia ruckeri, Edwardsiella   ictaluri, Renibacterium salmoninarum and Myxobolus cerebralis. In   addition the fish were tested for Ceratomyxa shasta spores in 2      and 2  1. To date, the only changes have been in the levels the   bacterial pathogens in the naturally produced smolts and they have   been minimal. These changes are attributed to normal fluctuation of   prevalence.    (VHS); (VHSv); (viral hemorrhagic septicemia); (viral haemorrhagic   septicaemia); (viral hemmorrhagic septicemia); (IHNV); (infectious   hematopoeitic necrosis virus); (Flavobacterium psychrophilum);   (Flavobacterium columnare); (Aeromonas salmonicida); (Yersinia   ruckeri); (Edwardsiella ictaluri); (Renibacterium salmoninarum);   (Myxobolus cerebralis); (Ceratomyxa shasta)

In progress
Start Date
End Date
Scope of Study
Field Investigation
Laboratory Investigation
Scale of Phenomena
Impact of Pollutants
Exotic Species
Resource Being Monitored
Beneficial Use Impairment Assessments
Fish Tumours or Other Deformities
Loss of Fish and Wildlife Habitat
Tainting of Fish and Wildlife Populations
Biology And Life History
Parasites and Diseases
Spread of Established ANS Populations
Range of Spread
Annex Numbers
Research & Development
Annex 17
Impact of water quality and AIS on fish and wildlife populations and habitats
  • Annex Numbers
    Annex Numbers
    Research & Development
  • Annex 17
    Annex 17
    Impact of water quality and AIS on fish and wildlife populations and habitats

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