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
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.
Reconditioned Steelhead Female in process of constructing her redd in Satus Creek, April 1, 2002. Table 1. Mark/recapture data for two PIT-tagged Yakima River steelhead kelt females captured and reconditioned at the Prosser Hatchery in 2001 and 2002. DescriptionLocationDate Post-eye-to- hyperal length (cm) Weight (kg) 3D9.1BF11A2C6A Captured / tagged / reconditioned Prosser10-May-01451.3 ReleasedProsser15-Nov-01523.0 Recaptured / reconditioned Prosser30-Apr-02511.9 ReleasedProsser10-Dec-02532.3 3D9.1BF1456C7D Captured / taggedRoza2-Apr-02472.1 Recaptured / reconditioned Prosser25-Apr-02481.7 ReleasedProsser10-Dec-02523.7 Recaptured / releasedRoza7-Mar-03533.5
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 3D9.1BF1565122 5/20/2002TAGCOLR3WJB02140.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. 5/20-28/2002 40 fish (12%) detected at Bonn. (upstream) – 29 in fall of 2002 + 11 in fall of 2003 31 fish (9.4%) detected at McNary (upstream) – 23 in fall of 2002 + 8 in fall of 2003 13 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.