Quantitative comparison and selection of home range metrics for telemetry data

Cumming, Graeme S., and Cornélis, Daniel (2012) Quantitative comparison and selection of home range metrics for telemetry data. Diversity and Distributions, 18 (11). pp. 1057-1065.

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Aim: Home range (HR) metrics are widely used in ecology and conservation, but the quantitative basis for choosing and parameterizing metrics is weak. Home range estimates are ecological and statistical hypotheses that must balance type I and type II errors. Here, we present and test a new approach to fine-tuning and comparing HR estimates using the area under the curve (AUC) statistic.

Location: Test data are taken from telemetry studies of 44 individual ducks in southern Africa and nine buffaloes in southern and western Africa.

Methods: We use a meta-analysis of AUC statistics to compare the performance of four standard HR metrics on data from 44 ducks (two species) and nine African buffaloes.

Results: The AUC method emerges as a useful and accessible statistical tool. It captures clear differences between HR estimators as well as providing a way of fine-tuning parameters for an individual HR estimate. Code to run the HR AUC analyses in R is provided. As argued by others, we found that kernel density estimators offer the best combination of ecological and statistical validity, while estimators that use minimum convex polygons at any stage of the algorithm perform poorly and should be avoided.

Main conclusions: The AUC statistic provides a readily implementable and straightforward approach to comparing different HR metrics and to selecting parameters for individual metrics. It thus offers a valuable tool for conservation efforts that seek to define HRs for species or populations. The use of the AUC in this new context further contributes to solidifying the interface between species occurrence models and HR estimators.

Item ID: 40959
Item Type: Article (Research - C1)
ISSN: 1472-4642
Keywords: argos, home range, kernel, LoCoH, movement ecology, PTT, ROC plot, species occurrence model, telemetry
Funders: CIRAD, Oppenheimer Foundation, University of Cape Town, French National Research Agency (ANR), French Foreign Ministry, French Embassy in Zimbabwe, USAID, Wildlife Conservation Society, DST/ NRF Centre of Excellence at the Percy FitzPatrick Institute of African Ornithology
Projects and Grants: RP-PCP Grant 2008, Global Avian Influenza network for Surveillance (GRIPAVI) programme
Date Deposited: 30 Nov 2015 01:46
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050104 Landscape Ecology @ 50%
05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050199 Ecological Applications not elsewhere classified @ 50%
SEO Codes: 97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 100%
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