Home
Field Notes
 
U.S. Fish & Wildlife Service
Field Notes Entry   
ARCATA FWO:Juvenile Salmonid Outmigration Monitoring on the Klamath River, California
California-Nevada Offices , August 31, 2009
Print Friendly Version
AFWO fish biologists check the catch from a frame net live box on the Klamath River (Photo:  Steve Gough, USFWS).
AFWO fish biologists check the catch from a frame net live box on the Klamath River (Photo: Steve Gough, USFWS). - Photo Credit: n/a
Rotary screw traps are used to sample juvenile salmonid outmigrants on the Klamath River (Photo:  Steve Gough, USFWS).
Rotary screw traps are used to sample juvenile salmonid outmigrants on the Klamath River (Photo: Steve Gough, USFWS). - Photo Credit: n/a
Young-of-the-year Chinook salmon (Photo:  Steve Gough, USFWS).
Young-of-the-year Chinook salmon (Photo: Steve Gough, USFWS). - Photo Credit: n/a
The distended belly on this juvenile Chinook salmon is a clinical sign of Ceratomyxa shasta infection (Photo:  Steve Gough, USFWS).
The distended belly on this juvenile Chinook salmon is a clinical sign of Ceratomyxa shasta infection (Photo: Steve Gough, USFWS). - Photo Credit: n/a

by Steve Gough,

Juvenile salmonid downstream migrant monitoring on the mainstem Klamath River has been conducted each spring since 2000 in a joint effort by the U.S. Fish and Wildlife Service's  Arcata Fish and Wildlife Office,  Karuk Tribe of California, and USGS Fort Collins (Colo.) Science Center.  The three main objectives of this study are to (1) estimate the number of young-of-the-year (YOY) chinook and coho salmon outmigrants passing three selected locations on the Klamath River, (2) document losses of YOY salmon between the three selected sites, and (3) assess the prevalence of specific diseases in juvenile salmonids in coordination with the U.S.Fish and Wildlife Service's California/Nevada Fish Health Center.

 

Annual juvenile salmon outmigrant monitoring begins in March at three sites on the mainstem Klamath River between Iron Gate Dam and the Scott River confluence. Rotary screw traps and frame nets are implements for this sampling and are typically run four nights per week (Monday through Thursday) and checked daily while operating.  Trapping season typically concludes when Iron Gate Hatchery releases its hatchery-raised YOY chinook salmon in mid to late May.

 

The California/Nevada Fish Health Center annually investigates infection rates of Ceratomyxa shasta, Parvicapsula minibicornis, and other pathogens in juvenile salmonids in the Klamath River below Iron Gate Dam through QPCR assays and histology analyses.  Our field crew samples YOY chinook salmon for this study on the mainstrem Klamath River between the Shasta and Scott River confluences.  Fish health sampling concludes once the YOY chinook salmon have migrated downstream and samples are no longer obtainable.

 

Updates and summaries of these projects are available on the Internet at http://www.fws.gov/arcata/fisheries/projectUpdates.html

 

 

 


Contact Info: Scott Flaherty, , Scott_Flaherty@fws.gov



Send to:
From:

Notes:
Find a Field Notes Entry

Search by keyword

Search by State




Search by Region


US Fish and Wildlife Service footer