Steve Roberts

Fish Health Specialist

May 2012

Lyons Ferry Hatchery – Snake River Fall chinook - Subyearlings – 1,422 K & yearlings 900 K Tucannon Spring Chinook – 230 K transferred to TH Steelhead – Lyons Ferry Steelhead – 260 K Wallowa Steelhead – 202 K Touchet stock Steelhead – 50 K

Tucannon Steelhead – 75 K Spokane Rainbow – 98 K

Tucannon Hatchery – Tucannon Spring Chinook – 230 K

Tucannon Steelhead – 75 K Spokane Rainbow – 141 K

Infectious Hematopoietic Necrosis – LFH and TH

Bacterial Kidney Disease – LFH and THBacterial Gill Disease - LFHBacterial Coldwater Disease – LFH and TH

“For every complex problem, there is a solution that is simple, neat and wrong.” H.L. Mencken

Lyons Ferry Hatchery

Last juvenile steelhead outbreak in 1992.IHN control measures: 100% well water, IHN

adult steelhead testing and destruction and/or segregation along with bio-security measures eggs and equipment sanitation

Year Lyons Ferry

Cottonwood

Touchet Tucannon

2011

2010 No Spawning

2009

2008 No Spawning

2007

2006

2005

2004

2003

2002

2001

2000IHN Positive IHN Negative

Tucannon HatcheryIHN outbreak in juvenile rainbow in late

spring 2011Previous IHN in rainbows in 1987.IHN outbreak likely from bio-security lapse. Facility depopulated and disinfected last

summer. Re-populated last fall with no problems to date.

BKD problems in yearling Tucannon spring chinook and yearling Snake River fall chinook.

Tucannon Spring ChinookLast BKD mortality in Tucannon spring chinook

at LFH and TH in 2003.Last BKD mortality in Snake River fall chinook

at LFH in 2006. BKD control measures: prespawning

erythromycin injection, broodstock ELISA testing - No culling or segregation along with single erythromycin feeding.

Snake River Fall ChinookLast BKD mortality in Snake River fall

chinook at LFH in 2006. BKD control measures: prespawning

erythromycin injection, broodstock ELISA testing – yearlings selected from BL females along with single erythromycin feeding.

Single erythromycin feeding was disontinued with on-station yearlings with BY 2010 and on-station and FCAP with BY 2011.

Year CHS-TU# Sampled

% B

& L

CHF-SR# Sampled

% B &

L

2011 86 99 898 100

2010 83 100 631 100

2009 96 99 893 100

2008 60 100 895 100

2007 36 100 1054 100

2006 45 96 623 100

2005 49 100 947 100

2004 46 96 872 100

2003 36 94 780 98

2002 47 98 668 94

2001 56 98 660 94

2000 38 100 1183 97

Bacterial Gill Disease caused losses in sub-yearling Snake River fall chinook at LFH.

Last BGD outbreak in spring 2009.BGD control measures low rearing densities

(less than 0.12 lbs/ft^3/in), improvement to flow in adult /juvenile ponds.

Annual BCWD losses with rainbow and steelhead at both LFH and TH.

BCWD losses every year in Lyons Ferry steelhead and Spokane rainbow at LFH.

BCWD occurs sporadic in other steelhead stock at LFH.

BCWD occurs most years in Spokane rainbow at TH.

BCWD outbreak treated with Aqualfor medicated feed. Some repeat treatments.

Additional improvements are needed i.e. vaccine.

Fish Disease Lyons Ferry Tucannon

IHN in RB & SS

BKD in CHS & CHF

BGD in CHF

BCWD in RB & SS

Hatchery staff at Lyons Ferry and Tucannon hatcheries.

WDFW fish health laboratory staff.