rc 106 proposal 123 - alaska department of fish and game · 2013-02-14 · proposal 123 effect of...
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![Page 1: RC 106 Proposal 123 - Alaska Department of Fish and Game · 2013-02-14 · Proposal 123 Effect of the proposal: Reauthorize antlerless moose hunts in Units . 19D, 20A, 20B, and 20D](https://reader030.vdocument.in/reader030/viewer/2022011900/5edf5b78ad6a402d666ab517/html5/thumbnails/1.jpg)
Proposal 123 Effect of the proposal: Reauthorize antlerless moose hunts in Units 19D, 20A, 20B, and 20D
Department recommendation: Amend & Adopt
(Do not reauthorize Unit 19D antlerless moose hunts)
RC 106
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Don Young/ADF&G
Proposal 123 – Unit 19D East
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Current and Proposed Unit 19 moose seasons:
Area Res or NR Permit type Bag limit Season
Unit 19D w/in Upper Kuskokwim CUA
Res Res NonRes
RM650 RM651
1 antlered bull Any moose
Sept 1 – Sept 25 TBA between Feb 1 – 28 No open season
Unit 19D Cheeneetnuk and Gagaryah Rivers except 2 mi from Swift
Res Res Res NonRes
RM650 RM651 Harvest Harvest
1 antlered bull Any moose 1 antlered bull 1 bull SF50-4
Sept 1 – Sept 25 TBA between Feb 1 – 28 Sept 1 – Sept 20 Sept 1 – Sept 20
Unit 19D Remainder
Res Res Res NonRes
RM650 RM651 Harvest
1 antlered bull Any moose 1 antlered bull
Sept 1 – Sept 25 TBA between Feb 1 – 28 Sept 1 – Sept 20 No open season
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Upper Kuskokwim Villages MMA
19D East
Moose survey area
Unit 19D East
19D East
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Considerations – Unit 19D East
n Population & harvest objectives
n Estimates of moose numbers
n 2-year avg twinning rates
n Predation
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Objectives for Upper Kuskokwim Villages Moose Management Area
n Moose numbers:
n At least 2,500 (2.2 moose/mi2) 2012 estimate: 1,337
(1.2 moose/mi2)
n Harvest: n At least 100
Current: ~95 – 100
Upper Kuskokwim Villages MMA
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Year UKVMMA (density)
MSA
2001 868 (0.8) 2,564 (0.5)
2004 1,192 (1.1) 2,744 (0.5)
2006 1,308 (1.2) 2007 1,720 (1.5) 2008 1,718 (1.5) 3,889 (0.7)
2009 1,820 (1.6) 2010 1,796 (1.6) 2011 1,647 (1.5) 2012 1,337 (1.2)
Unit 19D Moose Survey Area estimates
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Year UKVMMA (density)
MSA
2001 868 (0.8) 2,564 (0.5)
2004 1,192 (1.1) 2,744 (0.5)
2006 1,308 (1.2) 2007 1,720 (1.5) 2008 1,718 (1.5) 3,889 (0.7)
2009 1,820 (1.6) 2010 1,796 (1.6) 2011 1,647 (1.5) 2012 1,337 (1.2)
Unit 19D Moose Survey Area estimates
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Guidelines for managing growth (2-year avg. twinning rates)
2-year average twinning rates and moose management strategies associated with this measure 2-year ave. Twinning rates
Management strategy
> 25% Promote rapid growth 20 – 25 % Slow growth 15 – 20% Stabilize population density < 15% Reduce population density
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Observed twinning rates
Year Twins 2002 39% 2003 36% 2004 39% 2005 50% 2006 35% 2007 50% 2008 -- 2009 26% 2010 29% 2011 37% 2012 34%
2-Year Average twinning rate is 36%
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Browse surveys
n 40.5% browse utilization was measured in winter 2008-09
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Predators
n Wolves n In wolf control focus area (4,484 mi2)
n As low as possible
n Surrounding the MMA (1,718 mi2)
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Predators n Black Bears – n 2002 (pre-control) = 83–109 black bears
n 2003 = 21–39 black bears
n 2006 = 56–84 black bears
n 2009 = 96–162 black bears
n 528 mi2 bear control area inside the MMA
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Considerations – Unit 19D n Objective: 2,500 moose in
the MMA nEstimate: 1,337
n 2-year avg twinning rates n 36% (promote growth)
n Predator populations n Black bear recovered
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Don Young/ADF&G
Proposal 123 – Unit 20A
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Proposal 123 – Unit 20A Unit 20A antlerless reauthorization: •Combination of Drawing & Registration •Spread hunters spatially & temporally •August – February
Advisory Committee recommendation: Adopt: Fairbanks, Minto–Nenana, Middle Nenana River, Delta
Department recommendation: Reauthorize Unit 20A antlerless hunts
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§Regulate population growth §Meet IM harvest objective §Provide hunting opportunity, including subsistence
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Unit 20A Recommendations
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0
5000
10000
15000
20000
25000
1950 1955 1960 1965 1970 1975 1980 1985 1990 1995 2000 2005 2010
Popu
latio
n es
timat
e ( 9
0% C
I )
GMU 20A moose population trend, 1956-2012
Pop Objective
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IM Population Objective
obj
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1201 mi2 habitat 2829 moose 1648 cows
23 cow harvest 1:73
843 mi2 habitat 1221 moose 765 cows
10 cow harvest 1:73
842 mi2 habitat 1670 moose 1004 cows
14 cow harvest 1:73
626 mi2 habitat 1974 moose 1145 cows
16 cow harvest 1:73
1140 mi2
2773 moose 1732 cows
28 cow harvest 1:62
704 mi2
1235 moose 609 cows
9 cow harvest 1:73
391 mi2
492moose 312 cows
0 cow harvest 0:312
RY 2013-2014 Hunt
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RY2012-2013
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Don Young/ADF&G
Proposal 123 – Unit 20B
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•Combination of drawing & registration hunts •Seasons spread hunters in time and place •Aug. 15 – Nov. 15
Fairbanks AC –– Adopt Minto–Nenana AC –– Adopt
Reauthorize Unit 20B antlerless hunts
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Unit 20B Antlerless Moose Harvest Goals
• FMA: harvest opportunity, reduce road kill and nuisance moose
• MFMA: Help meet subsistence needs, curb population growth
• Central and Western 20B: Curb population growth
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• Eastern 20B “any moose” hunt: • DM783: Reduce road kill along the
Richardson highway (archery and muzzleloader)
Unit 20B Antlerless Moose Harvest Goals
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Unit 20B Management Concerns addressed by antlerless hunts
n High population – well above population objectives
n Low twinning rates
n Low calf weights
n Moderate to high browse removal
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Pop Objective
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Unit 20B Intensive Management Objectives
n Population Objective 12,000–15,000 n Current population: ~20,000
n Harvest objective 600–1,500 n Current harvest: ~400 cows
500–600 bulls 900 – 1,000 total
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Unit 20B Management Concerns addressed by antlerless hunts
n High population – well above population objectives
n Low twinning rates
n Low calf weights
n Moderate to high browse removal
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Guidelines for managing growth (2-year avg twinning rates)
2-year average twinning rates and moose management strategies associated with this measure 2-year ave. Twinning rates
Management strategy
> 25% Promote rapid growth 20 – 25 % Slow growth 15 – 20% Stabilize population density < 15% Reduce population density
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Unit 20B Twinning Rates
0
5
10
15
20
25
30
35
40
2006 2007 2008 2009 2010 2011 2012
% t
win
s
Year
Minto Flats
Central 20B
2-yr = 24%
2-yr = 11%
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Unit 20B Management Concerns addressed by antlerless hunts
n High population – well above population objectives
n Low twinning rates
n Low calf weights
n Moderate to high browse removal
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300 325 350 375 400 425 450 475 500
20A Nonburn Flats
20D Southw
est
20A Fish Ck Fire
13A West
20A Survey Line Fire
20B M
into Flats
20B C
entral
20A Foothills
22D Teller
22C N
ome
21D K
oyukuk
19D M
cGrath
20C N
orth
20C South
18 Bethel
17A Togiak 9-
Mon
th C
alf W
eigh
ts (l
bs)
Study Areas
Calf Weights Across Alaska
Nutritional Stress Alert Boertje et al 2007
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300 325 350 375 400 425 450 475 500
20A Nonburn Flats
20D Southw
est
20A Fish Ck Fire
13A West
20A Survey Line Fire
20B M
into Flats
20B C
entral
20A Foothills
22D Teller
22C N
ome
21D K
oyukuk
19D M
cGrath
20C N
orth
20C South
18 Bethel
17A Togiak 9-
Mon
th C
alf W
eigh
ts (l
bs)
Study Areas
Calf Weights Across Alaska
Nutritional Stress Alert Boertje et al 2007
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Unit 20B Management Concerns addressed by antlerless hunts
n High population – well above population objectives
n Low twinning rates
n Low calf weights
n Moderate to high browse removal
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C. T. Seaton, T. F. Paragi, R. D. Boertje, K. Kielland, S. DuBois, and C. L. Fleener. 2011. Browse biomass removal and nutritional condition of moose Alces alces. Wildlife Biology 17(1):55-66.
19A
20E
21E
19D
20A
25D
20D
20B
0
0.2
0.4
0.6
0.8
1
0.00 0.10 0.20 0.30 0.40 0.50
Moos
e twi
nning
rate
(2 yr
aver
age)
Proportion of browse biomass removed by moose
Spearman’s rho = -0.929, 0.005 < P < 0.001
Browse removal vs. Twinning rate
Unit 20A
Unit 25D
0.40 0.20 0.30 0.50 0.10 0.0
0.20
0.40
0.60
0.80
1
Proportion of Browse removed by Moose 2-y
r. a
vera
ge t
win
nin
g ra
te
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Antlerless Moose Hunts in Minto Flats & Central Unit 20B
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20B Antlerless moose harvest by drawing permit holders
n 2011 1,250 permits / 954 hunted (76%) 309 antlerless moose harvested (32% success) n 2012 1,250 permits / 830 hunted (66%) 273 antlerless moose harvested (32% success)
n Average = 290 antlerless moose/year
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Minto Flats Cow Harvest 2011 Limited registration permit Ø 150 permits issued Ø 78 antlerless moose harvested
2012 Unlimited registration permit Ø 826 permits issued Ø 120 antlerless moose harvested
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Unit 20B Antlerless Moose Harvest
Plans for 2013
n Continue current harvest levels: Approximately 400 moose total
n 250–300 through drawing permits.
n 100–120 through registration permits in Minto Flats MA.
nMaintain population until another survey is completed (2013).
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Don Young/ADF&G
Proposal 123 – Unit 20D
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Proposal 123 – Unit 20D •Combination of drawing & registration hunts •high density population ~ 3.1 moose/mi2
Delta AC – Adopt
Reauthorize Unit 20D antlerless hunts
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Proposal 123 – Unit 20D
n Proposal is to reauthorize antlerless hunts in southwest Unit 20D n for a cow without
calf, n Oct 10 – Nov 25
n Southwest Unit 20D hunt area: n South of Tanana Rv n West of Gerstle Rv
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Proposal 123 – Unit 20D
Background:
n 2006, population in SW Unit 20D increased to 5.6 moose/mi2
n Moderately low twinning rate
n Moderately high overwinter browse
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Proposal 123 – Unit 20D
•Decreasing trend in 20D twinning rates 2005 – 2009
0
5
10
15
20
25
30
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
% tw
ins
% Cow Moose With Twin Calves in SW Unit 20D, with 2-year average trend line
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Proposal 123 – Unit 20D
n Unit 20D antlerless moose harvest (cow
without calf)
2006 = 52 cows
2007 = 507 cows
2008 = 382 cows
2009 = 113 cows
Total = 1,054
0
100
200
300
400
500
600
700
1984
1986
1988
1990
1992
1994
1996
1998
2000
2002
2004
2006
2008
2010
SW Unit 20D Bull & Cow Moose Harvest
Cow Harvest
BullHarvest
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Proposal 123
SW Unit 20D cow hunt has reduced moose population density:
2006 n 7,559 moose
n 5.6 moose/mi2
2009 n 4,401 moose
n 3.1 moose/mi2
SW Unit 20D Moose Population Ests (SCF) 1973-2009
0100020003000400050006000700080009000
10000
1973 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009
Nu
mb
er
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Proposal 123 – Unit 20D
2011 - SW Unit 20D twinning rates increased to 25.8%
0
5
10
15
20
25
30
2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011
% tw
ins
% Cow Moose With Twin Calves in SW Unit 20D, with 2-year average trend line
2012
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Proposal 123 – Unit 20D n No plans to issue antlerless permits in
RY13
n Reauthorization is requested in case new data indicates a hunt is needed.
n Fall 2012 population estimate is being calculated.
n Twinning rates may be declining
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Proposal 123 – Unit 20D •Combination of drawing & registration hunts •high density population ~ 3.1 moose/mi2
Delta AC – Adopt
Reauthorize Unit 20D antlerless hunts n in case they need to be resumed quickly n Low 2012 twinning rates n Calculating 2012 population estimate
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Proposal 123 – Summary Effect of the proposal: Reauthorize antlerless moose hunts in Units 19D, 20A, 20B, and 20D Department recommendation: Amend & Adopt
§Do not reauthorize Unit 19D antlerless hunts
§Reauthorize hunts in § Unit 20A § Unit 20B § Unit 20D
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Don Young/ADF&G
Questions?