Journal ArticleDOI
Estimating overlap of daily activity patterns from camera trap data
Martin S. Ridout,Matthew Linkie +1 more
TLDR
In this paper, the similarity between two activity patterns may be quantified by a measure of the extent to which the patterns overlap, and several methods of estimating this overlap measure are described and their comparative performance for activity data is investigated in a simulation study.Abstract:
Data from camera traps that record the time of day at which photographs are taken are used widely to study daily activity patterns of photographed species. It is often of interest to compare activity patterns, for example, between males and females of a species or between a predator and a prey species. In this article we propose that the similarity between two activity patterns may be quantified by a measure of the extent to which the patterns overlap. Several methods of estimating this overlap measure are described and their comparative performance for activity data is investigated in a simulation study. The methods are illustrated by comparing activity patterns of three sympatric felid species using data from camera traps in Kerinci Seblat National Park, Sumatra.read more
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Journal ArticleDOI
Quantifying levels of animal activity using camera trap data
J. Marcus Rowcliffe,Roland Kays,Roland Kays,Bart Kranstauber,Bart Kranstauber,Chris Carbone,Patrick A. Jansen,Patrick A. Jansen +7 more
TL;DR: In this article, the authors present a method to estimate activity level with time-of-detection data from camera traps, fitting a flexible circular distribution to these data to describe the underlying activity schedule, and calculating overall proportion of time active from this.
Journal ArticleDOI
Fear of large carnivores causes a trophic cascade.
TL;DR: It is suggested that the results reinforce the need to conserve large carnivores given the significant “ecosystem service” the fear of them provides.
Journal ArticleDOI
Assessing tiger–prey interactions in Sumatran rainforests
TL;DR: This study quantifies temporal overlap between the Sumatran tiger and five of its presumed prey species from four study areas comprising disturbed lowland to primary submontane forest and provides the first insights into Sumatan tiger–prey temporal interactions.
Journal ArticleDOI
camtrapR: an R package for efficient camera trap data management
TL;DR: The free and open‐source R package camtrapR is described, a new toolbox for flexible and efficient management of data generated in camera trap‐based wildlife studies and should be most useful to researchers and practitioners who regularly handle large amounts of camera trapping data.
Journal ArticleDOI
Occupancy patterns and niche partitioning within a diverse carnivore community exposed to anthropogenic pressures
TL;DR: Differences in the temporal activity patterns of the apex predators and mesocarnivores supported a hypothesis of temporal niche partitioning, and it is suggested that a diverse carnivore community persists in this mixed use landscape because of seasonal variation in human land use.
References
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BookDOI
Density estimation for statistics and data analysis
TL;DR: The Kernel Method for Multivariate Data: Three Important Methods and Density Estimation in Action.
Book
Statistical Analysis of Circular Data
TL;DR: This book presents a meta-modelling framework for analysing two or more samples of unimodal data from von Mises distributions, and some modern Statistical Techniques for Testing and Estimation used in this study.
Book
Wild cats status survey and conservation action plan
Kristin Nowell,Peter Jackson +1 more
TL;DR: In this article, the authors present the most comprehensive and up-to-date information available on the 36 wild cats of the world, including range maps and some of the first photographs of rare species in the wild.
Book
Topics in Circular Statistics
TL;DR: In this article, the CircStats package is used to use Bessel functions to estimate the probability of a given point in a given set of data points and to detect outliers and change-point problems.