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Using PIT Tags to monitor and evaluate survival of reconditioned kelt steelhead in the Yakima River Basin Presented by: Bill Bosch Yakama Nation Fisheries.

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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:

1 Using PIT Tags to monitor and evaluate survival of reconditioned kelt steelhead in the Yakima River Basin Presented by: Bill Bosch Yakama Nation Fisheries

2 Yakima River Steelhead Returns, 1984 – Present

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4 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.

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7 Juvenile Fish Separator

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10 Steelhead Reconditioning Area

11 Chandler Kelt Collection, 2003 Sampled826 Released Immediately % Mortalities % 6/4/03 COLR3 Release % 12/8/03 PRO Release %

12 “Fresh” Steelhead kelts feeding in Prosser Hatchery holding pond, April 12, 2002.

13 Percent Weight Gain for Reconditioned Kelts 2001

14 Kelt Pictures Before and After

15 Short- and Long-Term Survival of Reconditioned Kelts to Release

16 Data Entry

17 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

18 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

19 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

20 Yakima R. Steelhead Escapement with Reconditioning 7.3%14.4% 2.4% Percentage increase in escapement due to reconditioning.

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