Keywords :
dynamic Brownian Bridge Movement
Models
home range size
movement patterns
king cobras
บทคัดย่อ :
Home range estimators are a critical component for understanding animal spatial ecology. The choice of home range estimator in spatial ecology studies can significantly influencemanagement and conservation actions, as different methods lead to vastly different inter-pretations of movement patterns, habitat selection, as well as home range requirements.Reptile studies in particular have struggled to reach a consensus on the appropriate homerange estimators to use, and species with cryptic behavior make home range assessmentdifficult. We applied dynamic Brownian Bridge Movement Models (dBBMMs) to radio-telem-etry data from Ophiophagus hannah, a wide-ranging snake species. We used two focal indi-viduals at different life stages (one juvenile male and one adult male) and sought to identifywhether the method would accurately represent both their home range and movement pat-terns. To assess the suitability of dBBMMs, we compared this novel method with traditional home range estimation methods: minimum convex polygons (MCP) and Kernel density estimators (KDE). Both KDE and MCP incorporated higher levels of Type I and Type II errors,which would lead to biases in our understanding of this species space-use and habitat selec-tion. Although these methods identified some general spatial-temporal patterns, dBBMMswere more efficient at detecting movement corridors and accurately representing long-termshelters sites, showing an improvement over methods traditionally favored in reptile studies. The additional flexibility of the dBBMM approach in providing insight into movement patternscan help further improve conservation and management actions. Additionally, our resultssuggest that dBBMMs may be more widely applicable in studies that rely on VHF telemetryand not limited to studies employing GPS tags.
เอกสารอ้างอิง :
Silva, I., Crane, M., Suwanwaree, P., Strine, C., & Goode, M. (2018). Using dynamic Brownian Bridge Movement Models to identify home range size and movement patterns in king cobras. PloS one, 13(9), e0203449.
