Using PIT Tags to monitor and evaluate survival of reconditioned kelt steelhead in the Yakima River...
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![Page 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.](https://reader035.fdocuments.us/reader035/viewer/2022062515/56649cd55503460f9499cc5b/html5/thumbnails/1.jpg)
Using PIT Tags to monitor and evaluate survival of reconditioned kelt steelhead in the Yakima River Basin
Presented by:
Bill BoschYakama Nation Fisheries
![Page 2: Using PIT Tags to monitor and evaluate survival of reconditioned kelt steelhead in the Yakima River Basin Presented by: Bill Bosch Yakama Nation Fisheries.](https://reader035.fdocuments.us/reader035/viewer/2022062515/56649cd55503460f9499cc5b/html5/thumbnails/2.jpg)
0
1,000
2,000
3,000
4,000
5,000
1984 1987 1990 1993 1996 1999 2002
Prosser Wild Hatch.
Yakima River Steelhead Returns, 1984 – Present
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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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Juvenile Fish Separator
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Steelhead Reconditioning Area
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Chandler Kelt Collection, 2003
0
10
20
30
40
50
60
70
80
90
3/12/2003 4/12/2003 5/12/2003 6/12/2003
Date of Collection
Nu
mb
er o
f F
ish
Sampled 826
Released Immediately 111 13.4%
Mortalities 227 27.5%
6/4/03 COLR3 Release 187 22.6%
12/8/03 PRO Release 301 36.4%
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“Fresh” Steelhead kelts feeding in Prosser
Hatchery holding pond, April 12, 2002.
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Percent Weight Gain for Reconditioned Kelts 2001
0
2
4
6
8
10
12
14
-50% -20% 10% 40% 70% 100% 130% 160%
% Wt. Gain
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Kelt Pictures Before and After
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Short- and Long-Term Survival ofReconditioned Kelts to Release
19.6%
33.8%
69.3%61.8%
89.9%
0.0%
20.0%
40.0%
60.0%
80.0%
100.0%
2001 2002 2003
LongTerm
ShortTerm
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Data Entry
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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.
Description Location DatePost-eye-to-
hyperal length (cm)
Weight (kg)
3D9.1BF11A2C6A
Captured / tagged / reconditioned
Prosser 10-May-01 45 1.3
Released Prosser 15-Nov-01 52 3.0
Recaptured / reconditioned
Prosser 30-Apr-02 51 1.9
Released Prosser 10-Dec-02 53 2.3
3D9.1BF1456C7D
Captured / tagged Roza 2-Apr-02 47 2.1
Recaptured / reconditioned
Prosser 25-Apr-02 48 1.7
Released Prosser 10-Dec-02 52 3.7
Recaptured / released Roza 7-Mar-03 53 3.5
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Tag History for 2002 below Bonn. ReleasesTagId EventDate EventType SiteID FileId Flags RearTyp3D9.1BF13A0362
5/20/2002 TAG COLR3 WJB02140.PRO AT KL FE W
8/27/2002 OBS B2A
8/27/2002 OBS BWL
9/3/2002 OBS MC1
9/27/2002 REC PROSRD BDW02244.BOS RE RF FE3D9.1BF13A2BAE
5/20/2002 TAG COLR3 WJB02140.PRO AT KL FE W
5/26/2002 OBS TWX3D9.1BF13A4AE1
5/20/2002 TAG COLR3 WJB02140.PRO AT KL FE W
9/16/2002 OBS BO1
10/28/2002 OBS MC2
11/25/2002 REC PROSRD BDW02244.BOS RE RF FE
3/31/2003 REC CHANDL WJB03071.PRO RE KL FE3D9.1BF1565122
5/20/2002 TAG COLR3 WJB02140.PRO AT KL FE W
7/17/2003 OBS BO3
7/26/2003 OBS MC2
Short-Term Kelt Reconditioning
3D9.1BF139F373
5/20/2002 TAG COLR3 WJB02140.PRO AT KL FE W
8/30/2002 OBS B2A
8/30/2002 OBS BWL
9/25/2002 OBS MC1
4/10/2003 OBS MCJ
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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
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Yakima R. Steelhead Escapementwith Reconditioning
0
1,000
2,000
3,000
4,000
5,000
2001-02 2002-03 2003-04
Fresh Recond.
7.3% 14.4%
2.4%
Percentage increase in escapement due to reconditioning.
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