Bull Trout Population and Habitat Surveys in the McKenzie and Middle Fork Willamette Presented by:...
-
Upload
nicole-dillon -
Category
Documents
-
view
217 -
download
0
Transcript of Bull Trout Population and Habitat Surveys in the McKenzie and Middle Fork Willamette Presented by:...
Bull Trout Population and Habitat Surveys in the McKenzie and
Middle Fork Willamette
Presented by:
Oregon Department of Fish and Wildlife
February 22, 2002
Project Number 199405300
Project Goal
Attain population health and long term sustainability of bull trout and their habitat in the Upper Willamette Basin.
Major Study Locations
100 20 30 40 50
KILOMETERS
WILLAMETTE BASIN,
OREGON
EUGENE
SOUTH FORK
MCKENZIE
MCKENZIE
MIDDLE FORK
WILLAMETTE
TRAIL BRIDGE
RESERVOIR
Project History
• 1992 - ODFW - Initiated monitoring in McKenzie and Middle Fork Willamette
• 1994 - BPA funded – Bull Trout Population and Habitat Surveys in the McKenzie and Middle Fork Willamette Basins
• 18 Cooperators
Project Partners
• Bonneville Power Administration
• Willamette National Forest
• US Fish and Wildlife Service
• Eugene Water and Electric Board
• Oregon Department of Transportation
• Oregon State Police
• Oregon Council Federation of Flyfishers
• McKenzie Flyfishers
• Trout Unlimited
• Native Fish Society
• National Fish and Wildlife Foundation (Bring
Back the Natives Program)
• Weyerhaeuser Company
• Bureau of Land Management
• McKenzie Watershed Council
• Saturday Academy (Apprenticeships in Science
and Engineering)
• Oregon Chapter American Fisheries Society
• Salvelinus confluentus Curiosity Society
• US Army Corps of Engineers
Upper Willamette Bull Trout Objectives
• Distribution• Population Size• Life History Characteristics• Implement Rehabilitation Plan for MFW• Effectiveness of Restrictive Angling
Regulations• Distribute Information
MethodsMigration, Distribution, and
Abundance
• Radio telemetry• Standard pool counts• Video cameras at Leaburg Dam and
Sweetwater Creek• Electronic fish counters in Anderson and
Roaring River• Trapping• Day and night snorkeling
Bull Trout Distribution – McKenzie Basin
Eugene Springfield
Blu
e R
iver
Trail Bridge Dam
South Fork McKenzie
Leaburg Dam
Cougar Dam
McKenzie River
Bull Trout DistributionMiddle Fork Willamette 1990-97
Springfield
Eugene
Oakridge
WillametteRiver
.
Hills Creek Res.
Fall Creek
Little Fall Creek
N. Fork Middle Fork WillametteDexter
Res.
Lookout Point Res.
Gold Lake
Salt Cr.
Waldo Lake
Salmon Cr.
One 35 cm bull trout
McKenzie Basin Bull TroutRedd Counts
0
20
40
60
80
1001
98
9
19
91
19
93
19
95
19
97
19
99
20
01
Nu
mb
er
of
Re
dd
s
Anderson Olallie Sweetwater Roaring River
Estimated Adult PopulationMcKenzie and South Fork McKenzie
• Anderson Creek
– 1999 249
– 2000 138
– 2001 107
• Roaring River
– 1999 41
– 2000 81
– 2001 67
Bull Trout Spawning Run TimingAnderson Creek
0
4
8
12
16
20
Bu
ll tr
ou
t
Upstream 00 (n=138)
Downstream 00 (n=107)
Bull Trout Adult Length FrequencyAnderson Creek
0
10
20
30
40
50
<30 31-40 41-50 51-60 61-70 71-80 >81
Length (cm)
Nu
mb
er o
f B
ull
tro
ut
Upstream 00 (mean = 46.2)
Downstream 00 (mean = 36.5)
Bull Trout Migration - Time of DayAnderson Creek
0
2
4
6
8
10
12
14
16
0 2 4 6 8 10 12 14 16 18 20 22 24
Time (hours)
% F
ish
/
ho
ur
Upstream 00
Downstream 00
Age 1+
Fry
Downstream Migrant Trap Anderson Creek
Anderson Creek Bull Trout Juvenile Trapping (Fry)
0
4,000
8,000
12,000
16,000
20,000
24,000
1994 1995 1996 1997 1998 1999 2000 2001
Nu
mb
er o
f F
ish
Anderson Creek Bull TroutJuvenile Trapping (Age 1+)
0
100
200
300
400
500
600
700
800
1994 1995 1996 1997 1998 1999 2000 *2001
Nu
mb
er o
f F
ish
* Did not trap during final four weeks of the trapping season
Bull Trout Releases for Rehabilitation
0
500
1000
1500
2000
2500
3000
1993 1994 1995 1996 1997 1998 1999 2000 2001
Nu
mb
er o
f F
ry
Sweetwater Cr.
Olallie Cr.
MF Willamette
Middle Fork WillametteJuvenile bull trout release sites
Staley C
r
Release Sites
Middle Fork W
illamette
Hills Creek Reservoir
Oakridge
Swift
Cr
Hills Creek Dam
Hatchery Rainbow Trout Program Changes
Year Location Action
1988 McKenzie River(RK 0 to RK 24)
Rb stocking discontinued
1992 McKenzie River Ad fin-clipped harvest only
1994 McKenzie River(RK 105 to RK 133)
Rb stocking discontinued
1997 South Fork McKenzie Rb stocking discontinued
1997 Trail Bridge Reservoir Ad fin-clipped harvest only
1997 Middle Fork Willamette(above Hills Creek Res)
Ad fin-clipped harvest only
Restrictive Angling Regulations
Year Location Action
1991 Willamette Basin Taking bull trout prohibited
1992 McKenzie River (Mainstem and South Fork)
All wild trout must be released
1994 McKenzie River (RK 105 to RK 133)
Artificial flies and lures only
1997 South Fork McKenzie Artificial flies and lures only
1997 Trail Bridge Reservoir All wild trout must be released
1997 Middle Fork Willamette (above Hills Creek Res.)
Artificial flies and lures only
All wild trout must be released
2001 Most McKenzie River tributaries and Trail Bridge Reservoir
Artificial flies and lures only
All wild trout must be released
Information DisseminationUpper Willamette Bull Trout Working Group
Project Summary
• Determined bull trout distribution, population size and trends
• Preliminary success with rehabilitation
– Spawning in Sweetwater Creek
– Sub-adult rearing in Middle Fork Willamette
• Angler awareness
• Information dissemination
Willamette Bull Trout2003 Proposed Activities
Re-introduction Study
Obj 1 Feasibility & suitability study
Obj 2 Collect & transfer bull trout
Obj 3 Monitor re-introduced bull trout
Obj 4 Monitor donor population
Long Term Monitoring
Obj 5 Monitor bull trout basin-wide
Objective 1
Feasibility & suitability study
1. Identify suitable introduction sites
• habitat
• temperature
• fish communities
• Assess donor population
• Test hatchery protocol
Objective 2 Collect & transfer bull trout
• Collect 10-20% out migrating fry from donor stream
• Identify with ventral clip
• Transfer half to introduction sites and half to Marion Forks Hatchery
• Rear in hatchery for approximately one year
• Transfer hatchery reared fish to introduction sites
Objective 3
Monitor re-introduced bull trout
1. Determine distribution
2. Estimate abundance of fish
3. Estimate growth
4. Estimate abundance of redds
5. Monitor stream temperatures
Objective 4 Monitor donor population
• Annual estimates of abundance for:
• Migrant juvenile
• Resident juvenile
• Adult
• Redds
• Determine long term trends
Objective 5Monitor bull trout basin-wide
1. Determine annual abundance of spawning bull trout
2. Determine summer distribution
3. Relate abundance of spawning bull trout progress towards recovery goals
Willamette Subbasin Summary
Re-introduction Study
• Assess potential to re-introduce bull trout in Santiam, Clackamas and Middle Fork Willamette watersheds
• Restore extirpated populations
Willamette Subbasin Summary
Long Term Monitoring
• Coordination & integration of monitoring efforts
• Increased monitoring of status & trends
• Prioritize restoration & protection efforts
• Protect & recover existing fish populations