Supplementary material from "Decision rules for determining terrestrial movement and the consequences for filtering high-resolution global positioning system tracks: a case study using the African lion ( Panthera leo )"

This is particularly the case for instrumented wildlife, with many studies now opting to record parameters at high (infra-second) sampling frequencies. However, the detail with which GPS loggers can elucidate fine-scale movement depends on the precision and accuracy of fixes, with accuracy being affected by signal reception.

We hypothesized that animal behaviour was the main factor affecting fix inaccuracy, with inherent GPS positional noise (jitter), being most apparent during GPS fixes for non-moving locations, thereby producing disproportionate error during rest periods. A movement verified filtering (MVF) protocol was constructed to compare GPS-derived speed data to dynamic body acceleration, to provide a computationally quick method for identifying genuine travelling movement.