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Hood Canal Steelhead Acoustic Telemetry Studies. Barry Berejikian and Skip Tezak NOAA Fisheries Northwest Fisheries Science Center Manchester Research Station. Hood Canal steelhead. Historically abundant Chronically depressed since mid-late 80’s - PowerPoint PPT Presentation
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Hood Canal Steelhead Acoustic Telemetry Studies
Barry Berejikian and Skip TezakNOAA Fisheries
Northwest Fisheries Science CenterManchester Research Station
Hood Canal steelhead
– Historically abundant
– Chronically depressed since mid-late 80’s
– Some indications of a north-south productivity ‘gradient’
– Limiting factors & potential role of supplementation
The problem
Depressed
Depressed
Depressed
Depressed
Depressed
Unknown
Unknown
Data from http://wdfw.wa.gov/fish/sassi/intro.htm
Can supplementation improve productivity of natural populations?
0
20
40
60
80
100
120
140
160
1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005
Nu
mb
er
of
Re
dd
s
Dosewallips R.
Duckabush R.
Hamma Hamma R
Dewatto R
?
Hood Canal Bridge
Hamma Hamma R.
Skokomish R.
Big Beef Creek
Dewatto R.
Admiralty Inlet
2005 Hood Canal Steelhead Study
•50 Hatchery reared steelhead(Hamma Hamma River)
•Weight: 48.9 – 129 g
•Length 173-233 mm (FL)
•V8 6L Tags provided and implanted by POST
•Tagged: 5/13/05•Released: 5/23/05
2005 Results Summary
Receiver locations
Complete ‘listening
line’
No. fish detected (% of released)
Min.
survival
Mean (±s.d.) travel time since
release (d)
Hamma Estuary No 36 (72%) 41 (84%) 3.30 (±5.23)
N. Hood Canal No 19 (38%) 22 (44%) 12.4 (± 9.9)
Strait of Georgia Yes 0 (0%) --
Strait of Juan de Fuca Yes 12 (24%) 12 (24%) 17.4 (±10.4)
2005 Hood Canal Steelhead Study
Hood Canal Bridge
Hamma Hamma R.
Skokomish R.
Big Beef Creek
Dewatto R.
Admiralty Inlet
4
13
31
5
15
N
05
1015202530
<0
.5
0.5
-1.0
1.0
-1.5
1.5
-2.0
2.0
-2.5
2.5
-3.0
3.0
-3.5
3.5
-4.0
4.0
-4.5
4.5
-5.0
5.0
<
Days
Fre
qu
en
cy Estuarine Residence
Travel time
4.6 d (0.8 d)1.2 – 2.0 blps
12.8 d (10.7 d)0.1 - 0.5 blps
Migratory pathway
2006 Hood Canal Steelhead Study (Proposed)
• H01: Hood Canal steelhead populations do not differ in early marine survival (river mouth to north end of Hood Canal, and Hood Canal to Straits of Juan de Fuca and Georgia).
• H02: Hood Canal steelhead populations do not show a preference for nearshore vs. open water migration routes through Hood Canal.
• H03: Steelhead individuals and populations inhabiting the nearshore environment spend a similar amount of time in eelgrass habitat and adjacent non-eelgrass habitats.
• H04: Individual steelhead characteristics: outmigration timing, length, weight, and condition factor do not affect rate of migration, habitat use, or stage-specific survival.
2006 Hood Canal Steelhead Study Design
Hood Canal Bridge
Hamma Hamma R.
Skokomish R.
Big Beef Creek
Dewatto R.
Admiralty Inlet•Three populations (Hamma
Hamma R., Skokomish R., Big Beef Creek)
•50 Wild smolts per population
•V9 Vemco Tags
•Two complete listening lines (Hood Canal Bridge and mid-Canal)
Collaborators
• Army Corps of Engineers • Hood Canal Coordinating Council • Hood Canal Salmon Enhancement Group• Jamestown S’Klallam Tribe• Kintama Research Corp./POST• Long Live the Kings• Northwest Fisheries Science Center • Point No Point Treaty Council • Skokomish Tribe • Washington Department of Fish and Wildlife • University of Washington