Presented by Lorraine McInnes Photo taken by Greg Wright.
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Transcript of Presented by Lorraine McInnes Photo taken by Greg Wright.
![Page 1: Presented by Lorraine McInnes Photo taken by Greg Wright.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649d0a5503460f949dc5bd/html5/thumbnails/1.jpg)
Movement patterns of Western Diamondback Rattlesnakes (Crotalus atrox) at Bosque del Apache National Wildlife Refuge, New Mexico
Presented by Lorraine McInnes
Photo taken by Greg Wright
![Page 2: Presented by Lorraine McInnes Photo taken by Greg Wright.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649d0a5503460f949dc5bd/html5/thumbnails/2.jpg)
Research Objectives
1) Describe rattlesnake movement patterns at
Bosque del Apache?
2) Do movement patterns and hibernacula differ
between riparian and upland habitat?
![Page 3: Presented by Lorraine McInnes Photo taken by Greg Wright.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649d0a5503460f949dc5bd/html5/thumbnails/3.jpg)
Project Tasks
Spatial Distributions
Data analysis:
Season and Gender variation, response to Temperature and
Moisture fluctuationsHabitat usage
Data Organization
![Page 4: Presented by Lorraine McInnes Photo taken by Greg Wright.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649d0a5503460f949dc5bd/html5/thumbnails/4.jpg)
Vicinity Map
Old
![Page 5: Presented by Lorraine McInnes Photo taken by Greg Wright.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649d0a5503460f949dc5bd/html5/thumbnails/5.jpg)
Vicinity Map
New
![Page 6: Presented by Lorraine McInnes Photo taken by Greg Wright.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649d0a5503460f949dc5bd/html5/thumbnails/6.jpg)
Distribution
Animal MovementsCreate Minimum Convex PolygonsCalculate Movement ParametersConvert Locations To Paths
Success!!
18 snakes-Routes and Home Range outputs
![Page 7: Presented by Lorraine McInnes Photo taken by Greg Wright.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649d0a5503460f949dc5bd/html5/thumbnails/7.jpg)
The wonders of Viewing the Full Extent
![Page 8: Presented by Lorraine McInnes Photo taken by Greg Wright.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649d0a5503460f949dc5bd/html5/thumbnails/8.jpg)
Data Editing
To get those results:
Many repetitions, changes in excel and arcmap
Learned many lessons on how to organize this kind of data
Currently:
Have an up to date, edited data file
Simplified, step by step repeatable process to get weekly movement results.
![Page 9: Presented by Lorraine McInnes Photo taken by Greg Wright.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649d0a5503460f949dc5bd/html5/thumbnails/9.jpg)
Data
Average size, all snakes (n=18): 31 ha, range 2-81 haAverage size, male (n=11): 35.2 ha, range 5-81 haAverage size, females (n=7): 24 ha, range 2-61 ha
SBDAERR
Sandog
Six S
tall
Bridge
Toile
tte
MLo
opOLD
LFRdNew
S
FeeB
ooth
Fire
shop
Hwy1To
ol
RR Tre
stle
Chucky
Hwy1Mar
sh
Spike
Smok
ey
Hwy1SVC
Mar
shLo
opS
Exit
0
10
20
30
40
50
60
70
80
90
Minimum Convex Polygon-Home Range Area
Hect
are
s
Male
Female
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Data
Name Average Distance Total Dist (m) RangeNo Move Days Total Days
Bridge 170.5 1534.5 41.2-382.3 15 24Chucky 55.5 4993.7 1.9-343 78 168Exit 97.9 6901.3 2.2-736.7 23 96Feebooth 59.1 5576.1 3.9-317.5 55 151Fireshop 64.2 4363.7 4.4-612.5 41 110Hwy1Marsh 68.0 4965.8 2.4-167.8 94 168Hwy1SVC 72.0 6980.9 1.1-541.9 169 267Hwy1Tool 84.5 8872.6 1.9-338.1 63 170LFRdNewS 67.9 4754.2 4.3-298.4 90 162MarshLoops 125.6 12053.0 1.4-715.6 63 161MLoopOLD 84.7 2712.0 1.4-435.2 42 76RR Trestle 80.1 7292.4 3.5-390.1 78 171Sandog 97.2 1360.2 2.2-476.9 38 54SBDAERR 31.1 1741.1 1.9-290.2 102 158Six Stall 70.0 3150.6 2.4-241.1 59 106Smokey 96.4 6938.5 5.8-780.8 30 103Spike 123.4 8266.5 2.4-414.7 60 128Toilette 76.1 4108.5 .9-537.4 64 120
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Visualizing Snake Movement
![Page 12: Presented by Lorraine McInnes Photo taken by Greg Wright.](https://reader030.fdocuments.in/reader030/viewer/2022032703/56649d0a5503460f949dc5bd/html5/thumbnails/12.jpg)
Annual Cycle
Next step:
Activity Clustering
Statistical Analysis of Movements to describe movement differences by habitat, season, and gender
*Revisit Spatial Statistics and Regression Analysis Virtual Courses
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Road Crossing
Hwy 1 and/or RR was crossed 81 times.
Hwy1Tool-crossed road or tracks 22 times.
Next highest number of crossings: 12
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Trials and Tribulations
ArcScene-3D animation
Animation in general
Habitat-spatial join…veg type text to numeric value?!
Hawth’s Tools-route issues continue
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Continued Work
Refine movement parameters and generate more descriptive statistics
Animate certain routes to better visualize movement, 2D, 3D-Flythrough tour
Generate habitat use spatial join to determine which habitats the snakes were used more than others
Field work: Characterize new dens and determine site preference based on various parameters-slope, aspect, elevation, proximity to roads, water, man-made structures, etc.
Den Site Suitability model
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Questions??