No Slide Title€¦ · Methods – Tracking Tunnels • Rodents/Mustelids/Weta • 20 randomly...
Transcript of No Slide Title€¦ · Methods – Tracking Tunnels • Rodents/Mustelids/Weta • 20 randomly...
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James Griffiths
Project Kaka Understanding the effects of 3 yearly aerial 1080
applications for animal pest control
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Project Kaka initiated
Switch from possum focused control to multi-pest
control
• 6 year aerial 1080 applications to 10,000ha blocks halted over
(36, 000ha) of Tararua Forest Park - 2007
• 3 year aerial 1080 with pre-feed commenced Nov 2009
(22,000ha)-Otaki to Mt Holdsworth
• Hutt Water Catchment (10,000ha), ongoing aerial 1080 treatment
by GWRC, 6 year cycle, last 1080 application May 2009
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Rationale
• Pre-fed 1080 treatment can control multiple pests
• Rats
• Mustelids
• Possums
• Increased treatment area size, consideration of shape &
edge topography
– reduced pest immigration
• 3 year treatment cycle should allow two good bird
breeding seasons every three years
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Bird populations
Time
Bir
d
Den
sit
y
3-yearly vs 6 yearly pest control
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• Comprehensive research programme implemented 2009
• Rodents/Mustlids/Possums
• Birds
• Invertebrates
• Deer
• Forest structure/composition
• Fruit abundance
• Long term - 10 year
• Research partnerships established – DOC R&D, Greater Wellington Regional Council, Landcare Research, AHB & Vic Uni
Can we use 3 yearly 1080 ops to restore a forest ecosystem?
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Research objectives
1. How does 3-yearly aerial 1080
treatment influence the abundance
and distribution of target pest species
(possums, rats, stoats) and non-target
pests (mice, deer)?
2. How are the abundance and
distribution of target/non-target pest
species related to the abundance and
distribution of vulnerable native
animal and plant species?
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Research objectives
3. How are the abundance and
distribution of target pest species and
breeding of fruit-feeding birds related
to changes in beech and rimu
seedfall?
4. What is the effect of stopping 6-
yearly aerial 1080 control on
target/non-target pest species and
ecosystem health?
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Methods – 5MBC
• 120 stations/treatment
• random locations – First detection of
individual birds recorded
– Time of detection recorded
– Digital audio recording
(Olympus LS10)
• sampling frequency
– annual
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Methods – Tracking Tunnels
• Rodents/Mustelids/Weta
• 20 randomly placed transects per treatment/non-treatment area
• At least 1km apart
• 10 tracking tunnels per line
• sampling frequency
– Quarterly – Rodents&Weta
– Jan,Feb – Mustelids
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Methods – Waxtags
• Possums
• 40 randomly placed transects per treatment /non-treatment
• 30 waxtags per transect
• sampling frequency
– annual
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Methods – Faecal Pellet Index
• Deer
• 40 randomly placed transects per
treatment/non-treatment
• 30x1m radius plots per transect
• Pellet groups counted in each plot
• Sampling frequency
– annual
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Methods – Seedrain Traps
• Fruitfall, Stick insect
eggs & Weta frass
• Placed under randomly
selected rimu silver and
beech
• Sampling frequency
– Nov, Feb
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Methods – Ungulate exclusion plots
• Impact of deer on forest structure and composition
• Randomly selected sites
• Sampling frequency
– 5 years
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Methods – 20x20m vegetation plots
• Forest/Structure and Composition
– Emphasis on demography/mortality
• Randomly selected from existing plot network
• Tagged palatable/unpalatable stems
• Browse scores recorded for tagged stems
• Sampling frequency
– 10 years
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Preliminary results – Possums
2012 data to come
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0.0
0.1
0.2
0.3
0.4
Year
Bite
Mar
k In
dex
2010 2011 2010 2011 2010 2011
Hutt Catchment Non Treatment Project Kaka
1080
app
licat
ion
1080
app
licat
ion
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Preliminary results - Rats
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0.0
0.1
0.2
0.3
0.4
0.5
0.6
mean t
rackin
g r
ate
2009 2010 2011 2012 2009 2010 2011 2012 2009 2010pre 2010post 2011 2012
Hutt Catchment Non Treatment Project Kaka
10
80
ap
plic
atio
n
10
80
ap
plic
atio
n
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Preliminary results - Mice
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0.0
0.1
0.2
0.3
0.4
0.5
0.6
mean t
rackin
g r
ate
2009 2010 2011 2012 2009 2010 2011 2012 2009 2010pre 2010post 2011 2012
Hutt Catchment Non Treatment Project Kaka
10
80
ap
plic
atio
n
10
80
ap
plic
atio
n
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Preliminary results - Stoats
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0.0
0.1
0.2
0.3
0.4
0.5
Year
mea
n tr
acki
ng r
ate
2010 2011 2012 2010 2011 2012 2010 2011 2012
Hutt Catchment Non Treatment Project Kaka
1080
app
licat
ion
1080
app
licat
ion
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Preliminary results – Deer
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0.5
1.0
1.5
2.0
Year
faecal pelle
t in
dex
2010 2011 2012 2010 2011 2012
Non Treatment Project Kaka
1080 a
pplic
atio
n
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Preliminary results – Birds
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0.4
0.6
0.8
1.0
1.2
1.4
1.6
Rifleman
me
an
nu
mb
er
of b
ird
s p
er
5 m
inu
te b
ird
co
un
t
n=100 n=100 n=100 n=118 n=108 n=118 n=114 n=113 n=117
De
c-0
9
De
c-1
0
De
c-1
1
De
c-0
9
De
c-1
0
De
c-1
1
De
c-0
9
De
c-1
0
De
c-1
1
Hutt Catchment Non Treatment Project Kaka
1080 a
pplication
1080 a
pplication
0.5
1.0
1.5
Whitehead
n=100 n=100 n=100 n=118 n=108 n=118 n=114 n=113 n=117
De
c-0
9
De
c-1
0
De
c-1
1
De
c-0
9
De
c-1
0
De
c-1
1
De
c-0
9
De
c-1
0
De
c-1
1
Hutt Catchment Non Treatment Project Kaka
1080 a
pplication
1080 a
pplication
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0.0
0.1
0.2
0.3
0.4
Kakariki
me
an
nu
mb
er
of b
ird
s p
er
5 m
inu
te b
ird
co
un
t
n=100 n=100 n=100 n=118 n=108 n=118 n=114 n=113 n=117
De
c-0
9
De
c-1
0
De
c-1
1
De
c-0
9
De
c-1
0
De
c-1
1
De
c-0
9
De
c-1
0
De
c-1
1
Hutt Catchment Non Treatment Project Kaka
1080 a
pplication
1080 a
pplication
1.0
1.5
2.0
2.5
Tomtit
n=100 n=100 n=100 n=118 n=108 n=118 n=114 n=113 n=117
Dec-0
9
Dec-1
0
Dec-1
1
Dec-0
9
Dec-1
0
Dec-1
1
Dec-0
9
Dec-1
0
Dec-1
1
Hutt Catchment Non Treatment Project Kaka
1080 a
pplication
1080 a
pplication
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0.0
0.1
0.2
0.3
Tui&Bellbird
me
an
nu
mb
er
of b
ird
s p
er
5 m
inu
te b
ird
co
un
t
n=100 n=100 n=100 n=118 n=108 n=118 n=114 n=113 n=117
De
c-0
9
De
c-1
0
De
c-1
1
De
c-0
9
De
c-1
0
De
c-1
1
De
c-0
9
De
c-1
0
De
c-1
1
Hutt Catchment Non Treatment Project Kaka
1080 a
pplication
1080 a
pplication
0.0
00
.05
0.1
00
.15
0.2
00
.25
0.3
00
.35
Fantail
n=100 n=100 n=100 n=118 n=108 n=118 n=114 n=113 n=117
De
c-0
9
De
c-1
0
De
c-1
1
De
c-0
9
De
c-1
0
De
c-1
1
De
c-0
9
De
c-1
0
De
c-1
1
Hutt Catchment Non Treatment Project Kaka
1080 a
pplication
1080 a
pplication
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Acoustic Recorders – Birds
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What next?
• 1080 applied
– Project Kaka area 2013&2016
– Hutt Catchment 2015
• Ensure sampling is consistent and executed to a high standard
• Develop models that accurately predict the effect of treatment
and interactions between animal pests, fruiting events, & native
flora & fauna
• Report on progress
– Stakeholder newsletters
– Internet
– Science literature
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Acknowledgements
• DOC Graeme Elliott, Maheswaran Rohan, Josh Kemp, Ben Reddiex, Colin Miskelly, Jack Mace, Clare Veltman, Wairarapa and Kapiti AO staff
• Greater Wellington RC – Philippa Crisp, Kim Broad, Owen Spearpoint and field staff
• Landcare Research - Mandy Barron, Wendy Ruscoe, Rob Allen & Peter Bellingham
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Questions?