Presentation on theme: "Using PIT Tags to monitor and evaluate survival of reconditioned kelt steelhead in the Yakima River Basin Presented by: Bill Bosch Yakama Nation Fisheries."— Presentation transcript:
Using PIT Tags to monitor and evaluate survival of reconditioned kelt steelhead in the Yakima River Basin Presented by: Bill Bosch Yakama Nation Fisheries
Yakima River Steelhead Returns, 1984 – Present
Natural Life History of Steelhead (Oncorhynchus mykiss) Anadromous and Resident Forms Smoltify at various ages Multiple years in ocean Able to spawn on more than one occasion – Spawned out adults (Kelts) return to the ocean, gain weight, develop new eggs, then return to fresh water streams to spawn again.
Juvenile Fish Separator
Steelhead Reconditioning Area
Chandler Kelt Collection, 2003 Sampled826 Released Immediately % Mortalities % 6/4/03 COLR3 Release % 12/8/03 PRO Release %
“Fresh” Steelhead kelts feeding in Prosser Hatchery holding pond, April 12, 2002.
Percent Weight Gain for Reconditioned Kelts 2001
Kelt Pictures Before and After
Short- and Long-Term Survival of Reconditioned Kelts to Release
Reconditioned Steelhead Female in process of constructing her redd in Satus Creek, April 1, Table 1. Mark/recapture data for two PIT-tagged Yakima River steelhead kelt females captured and reconditioned at the Prosser Hatchery in 2001 and DescriptionLocationDate Post-eye-to- hyperal length (cm) Weight (kg) 3D9.1BF11A2C6A Captured / tagged / reconditioned Prosser10-May ReleasedProsser15-Nov Recaptured / reconditioned Prosser30-Apr ReleasedProsser10-Dec D9.1BF1456C7D Captured / taggedRoza2-Apr Recaptured / reconditioned Prosser25-Apr ReleasedProsser10-Dec Recaptured / releasedRoza7-Mar
Tag History for 2002 below Bonn. Releases TagIdEventDateEventTypeSiteIDFileIdFlags RearTyp 3D9.1BF13A0362 5/20/2002TAGCOLR3WJB02140.PROAT KL FEW 8/27/2002OBSB2A 8/27/2002OBSBWL 9/3/2002OBSMC1 9/27/2002RECPROSRDBDW02244.BOSRE RF FE 3D9.1BF13A2BAE 5/20/2002TAGCOLR3WJB02140.PROAT KL FEW 5/26/2002OBSTWX 3D9.1BF13A4AE1 5/20/2002TAGCOLR3WJB02140.PROAT KL FEW 9/16/2002OBSBO1 10/28/2002OBSMC2 11/25/2002RECPROSRDBDW02244.BOSRE RF FE 3/31/2003RECCHANDLWJB03071.PRORE KL FE 3D9.1BF /20/2002TAGCOLR3WJB02140.PROAT KL FEW 7/17/2003OBSBO3 7/26/2003OBSMC2 Short-Term Kelt Reconditioning 3D9.1BF139F373 5/20/2002 TAG COLR3WJB02140.PROAT KL FEW 8/30/2002 OBS B2A 8/30/2002 OBS BWL 9/25/2002 OBS MC1 4/10/2003 OBS MCJ
Short-Term Kelt Reconditioning 331 PIT fish released below Bonn. 5/20-28/ fish (12%) detected at Bonn. (upstream) – 29 in fall of in fall of fish (9.4%) detected at McNary (upstream) – 23 in fall of in fall of fish detected in Yakima R. Sept02-Apr03 10 fish detected moving downstream at Prosser or McNary in the spring of 2003
Yakima R. Steelhead Escapement with Reconditioning 7.3%14.4% 2.4% Percentage increase in escapement due to reconditioning.