Evaluation of the Accuracy of Kernel Density Estimators for Home Range Analysis

• Published in: Ecology (Durham) Vol. 77; no. 7; pp. 2075 - 2085
• Main Authors: Seaman, D. Erran, Powell, Roger A.
• Format: Journal Article
• Language: English
• Published: Washington, DC Ecological Society of America 01-10-1996
• Subjects: Analysis; Animal populations; Animal, plant and microbial ecology; Animals; Biological and medical sciences; Black bears; Data smoothing; Density; Density estimation; Estimate reliability; Estimation bias; Estimation methods; Estimators; Fundamental and applied biological sciences. Psychology; General aspects. Techniques; Harmonic mean; Kernel functions; Methods and techniques (sampling, tagging, trapping, modelling...); Population density; Telemetry; Statistical method; Radiotelemetry; Spatial distribution; Home range; Spatial analysis; Non parametric method; Kernel method
• ISSN: 0012-9658; 1939-9170
• DOI: 10.2307/2265701

Kernel density estimators are becoming more widely used, particularly as home range estimators. Despite extensive interest in their theoretical properties, little empirical research has been done to investigate their performance as home range estimators. We used computer simulations to compare the area and shape of kernel density estimates to the true area and shape of multimodal two—dimensional distributions. The fixed kernel gave area estimates with very little bias when least squares cross validation was used to select the smoothing parameter. The cross—validated fixed kernel also gave surface estimates with the lowest error. The adaptive kernel overestimated the area of the distribution and had higher error associated with its surface estimate.