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Researchers Explore How Ocean Changes Have Led To Thiamine Deficiency Increasing Juvenile Salmon Mortality; Swimming In Corkscrew Patterns

October 30th, 2020

Scientists from several fish and wildlife agencies have launched a rapid research and response effort to tackle a deficiency of thiamine, or Vitamin B1, recently found to be increasing juvenile mortality among chinook salmon in California’s Central Valley.

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Wild Upper Columbia Spring Chinook Long Way From Recovery, Less Than 1 Percent Return To Spawning Grounds

October 30th, 2020

Wild Upper Columbia spring chinook are “pretty far from de-listing,” said Dan Rawding, Columbia River Salmon Recovery Coordinator for the Washington Department of Fish and Wildlife, in a presentation at this month’s Northwest Power and Conservation Council meeting.

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Spring Chinook, Fall Chinook Different Fish? New Study Says ‘Fundamentally The Same Animal.’

October 30th, 2020

Historically, spring-run and fall-run chinook salmon have been considered as separate subspecies, races, ecotypes, or even as separate species of fish. A new genetic analysis, however, shows that the timing of migration in chinook salmon is determined entirely by differences in one short stretch of DNA in their genomes.

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96,000 Juvenile Steelhead Removed From Production After IHN Virus Detected At Idaho Hatchery

October 30th, 2020

In response to detection of IHN virus, Idaho Fish and Game hatchery staff at Magic Valley Fish Hatchery last week removed approximately 96,000 juvenile B-run steelhead from production. The IHN virus is not uncommon in southern Idaho fish, but the strain of the virus detected in the fish at the Magic Valley Hatchery is not known to be native to the area.

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