cariboo region moose allocation ministry of environment nov. 6, 2008
TRANSCRIPT
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Cariboo Region Moose Allocation
Ministry of EnvironmentNov. 6, 2008
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Overview• Current Status of Moose in the Cariboo
– Game Management Zones– Moose Population Estimates– Moose Harvest Estimates
• Moose Harvest Management– Management Objectives 2009-2011– Moose Population Model– Annual Allowable Harvest
• Harvest Allocation– Harvest Allocation Policy– Current Annual Allocation
• Next Steps
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Current status of Moose in the Cariboo
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Game Management Zones (GMZ’s)
• GMZ’s are amalgamations of wildlife management units (WMU’s) which share similar ecological characteristics and hunter harvest patterns
• GMZ’s provide the basic geographic area for assessing moose populations and developing and implementing harvest strategies
• Hunting regulations are set by WMU• The Cariboo region is divided into 5 GMZ’s and
16 WMU’s
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GMZ’s and WMU’s in the Cariboo
GMZ Name WMU’s Area (km2)
5A Quesnel Highland 5-15, 5-16 10,758
5B Cariboo 5-01, 5-02 16,535
5C North Chilcotin 5-10, 5-12 to 5-14 32,093
5D South Chilcotin 5-03 to 5-06 24,543
5E Central Coast 5-07 to 5-09 & 5-11
32,609
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Moose Population Estimates
• Population estimates are made for each Game Management Zone (GMZ)
• Population estimates are from Stratified Random Block surveys (SRB), supplemented with Composition Surveys and Historic Harvest Data
• Survey results are extrapolated to estimate moose numbers in each GMZ
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Moose Surveys
Number of Random Stratified Block Surveys completed by year in the Cariboo Region
0
1
2
3
4
5
6
7
1994 1996 1998 2000 2002 2004 2006 2008
Year
Nu
mb
er
of
Su
rve
ys
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Example: 5-13C Kluskus (2008)
• SRB Survey conducted in Jan and Feb 2008• Survey area was 4,008 km2 divided into 293 16
km2 blocks• 91 blocks or 31% of area surveyed by helicopter• Stratification required 31 hours of fixed- wing
time and cost $10,421.13• Helicopter survey time totaled 67 hours and cost
$64,667.50• With contractor costs the total survey cost
exceeded $111,000
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5-13C Kluskus Survey Results
• Observed Moose Density: 36 Moose per 100 km2
• Corrected Moose Density: 49 Moose per 100km2 up from 37 in 1997
• Estimated Bull/Cow ratio: 35 Bulls/100 Cows• Estimate Calf/Cow ratio: 31 Calves/100 Cows• GMZ 5C Population Estimate:
– 30,088 km2 suitable moose habitat– GMZ 5C estimated moose density: 0.44 moose/km2 – Total estimate = 13,193 moose
• 2,777 bulls• 7,276 cows• 3,140 calves
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Moose Population Estimates by GMZ
Game Management Zone
Moose Estimate
Bulls Cows Calves
5A –Quesnel
Highlands
1525 448 945 132*
5B –Cariboo 6727 1410 3721 1596
5C –North
Chilcotin
13,193 2,777 7,276 3,140
5D –South
Chilcotin
5,945 1,393 3,211 1,341
* GMZ 5A calf/cow ratio well below required ratio for population growth
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Moose Population Estimates: 2004 and 2008
Game Management
Zone
2004 2008 % Change
GMZ 5A 2,850* 1,525 - 46%
GMZ 5B 6,650 6,727 + 1%
GMZ 5C 11,225 13,193 + 18%
GMZ 5D 5,300 5,945 +12%
*2004 GMZ 5A pop. Est. not based on SRB surveys
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Moose Harvest Estimates for R5
Cariboo Region Non-First Nations Estimated Moose Harvest 1991-2007
0
500
1000
1500
2000
2500
3000
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
Year
Es
tim
ate
d H
arv
es
t
Resident
Non-Resident
Partial LEH introduced
Full LEH
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Moose Harvest by GMZ, 2004-08Total Moose Harvest (resident and non-resident) by
GMZ
0
100
200
300
400
500
600
700
2003 2004 2005 2006 2007
Year
Ha
rve
ste
d M
oo
se
GMZ 5A
GMZ 5B
GMZ 5C
GMZ 5D
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Moose Harvest Management
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Management Objectives: 2009-11• Manage for bull/cow ratios above 30 bulls/100
cows• Manage for densities above 40 moose/100 km2
in MU’s 1, 2, 3, 4, 5, 13, 14• Manage moose numbers in conjunction with
caribou recovery efforts within MU’s 6, 10, 11, 12 & 15
• Ensure FN harvest needs are addressed• Provide a resident hunter success rate of less
than 25 days per harvested moose
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Moose Population Model• Model forecasts the status of each GMZ
population through the allocation period• Incorporates estimates of population size,
bull/cow and calf/cow ratios, natural mortality rates, and historic harvests; as well as uncertainty of all estimates.
• Allows us to assess the consequences of different harvest levels relative to objectives, and to examine trade-offs
• Used to calculate the Annual Allowable Harvest (AAH)
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Steps to Determine the AAH
1. Assemble biological data by GMZ and estimate moose population size
2. Construct moose population model3. Use model to assess consequences to moose
population health under different harvest levels.4. Use the model to estimate the AAH that best
achieves management objectives 5. Discuss modeling results with First Nations,
resident hunters and guide-outfitters6. Determine final AAH
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Preliminary Estimates of AAH by GMZ
• GMZ 5A – Reduce AAH by 20% – Wolf predation has reduced calf/cow ratio well
below recommended minimums for population growth
– Maintaining current AAH has high likelihood of reducing bull/cow ratios below 30/100
• GMZ 5B, 5C, 5D – maintain current AAH – should maintain stable to increasing moose
populations
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Harvest Allocation
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Harvest Allocation Process
• Harvest allocations are determined on a regional basis by the Regional Manager
• Priorities of allocation:1. Conservation2. First Nation sustenance harvest3. Resident harvest4. Non-resident harvest
• Harvest Allocation Policy determines harvest share between residents and non-residents
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Current Annual Allocation (2004-2008)
• First Nations sustenance 946 moose– Need updated FN tradition use data
• Resident hunters (LEH) 1070 bulls
• Non-res. hunters (quotas) 260 bulls
• Total 2276 moose
(total harvest is approximately 9% of population)
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Request for Harvest Information from First Nations
– Estimate of current and expected annual harvest over next 3 years
– The proportion of harvest made up of bulls, cows and calves
– Location of harvest by Management Unit
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Next Steps• Complete consultation with
FN and update sustenance needs
• Update population modeling and develop final AAH
• Undertake allocation between users according to allocation policy
• Determine specific guide outfitter quotas
• Process must be completed by the end of March, 2009
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GMZ 5A Resident Hunter Sucess Rate 2000-2007
0.20
0.22
0.24
0.26
0.28
0.30
0.32
0.34
0.36
0.38
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
Year
Su
cc
es
s R
ate
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GMZ 5B Resident Hunter Success 2000-2007
0.1
0.2
0.3
0.4
0.5
0.6
0.7
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
Year
Su
cc
es
s R
ate
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GMZ 5C Resident Hunter Success 2000-2007
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
Year
Su
cc
es
s R
ate
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GMZ 5D Resident Hunter Success 2000-2007
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0.45
0.5
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008
Year
Su
cc
es
s R
ate