camera trap data: managing and archiving
TRANSCRIPT
Camera trap data:
managing and archiving
Zoe A. Woodgate UCT & EWT
Introduction
Introduction
Introduction
Introduction
Introduction
© Johnny Armstrong
Features of camera traps
Features of camera traps
White flash Infrared flash Black flash
© Cuddeback
Common Survey Designs
Analyses
Trade-offs Sample size
Target Species
Type of camera Camera placement
Aim of study
Extent of survey
Mike Meredith (taken from www.mikemeredith.net)
Common Survey Designs
Mike Meredith (taken from www.mikemeredith.net)
Common Survey Designs
Mike Meredith (taken from www.mikemeredith.net)
Common Survey Designs
Define
What is an independent event?
What is a sampling period?
Data management
Duplicates and independence
Manual excel input = inefficient
Programs designed to ease management
Snoopy Aardwolf
Camera Base
Camera Base
Camera Base Batch import allows you to quickly
process a large number of images
from digital cameras.
Sorts photographs into surveys/ and
sites that have been previously
created.
Automatically stores information of
time and data from image.
Camera Base
Camera Base
Basic Analyses
Determine drivers of distribution
Abundance estimates
Compare over spatial/temporal scales
Behavioural studies
Variation in long-term community surveys
(check out https://www.snapshotserengeti.org!)
Basic Analyses
Community
Relative abundance
Indices
Diversity indexes
Species accumulation
Presence/ absence
Detection-nondetection occupancy
models
Estimated abundance
Spatially-explicit
capture- recapture
Rowcliffe (2008) density
estimation
Basic Analyses
Not all surveys were made equal
Human error
Detection issues
Incomplete surveys
Overparameterization of models
BUT bear in mind not perfect! Many drawbacks/trade-offs
Discussion
Where is it coming from?
What was the survey’s intent?
Additional ecological data?
What is your objective?
When looking to manage camera trap data: