Dissertation Seminar : Determining Movement and Home Range of Sumatran Tigers, Panthera tigris sumatrae Pocock, 1929 Based on Monitoring of GPS Collars
Dolly Priatna, Yanto Santosa, Lilik B. Prasetyo, Agus P. Kartono
Although translocation has been used in mitigating human-carnivores conflict for decades, few studies conducted on behavior ecology of post released animals. In this study we examine the movement and home range as well as determine the type of land cover which most frequently used by translocated tigers. Between July 2008 and December 2010 we translocated six Sumatran tigers and released them 74–1,350 km from their capture sites. All tigers were fitted with global positioning system (GPS) collars. The collars were set to fix 24-48 location coordinates per day. The mean distance moved by the tigers varies from 2.8 to 4.0 km per day. The female moved further than the males and statistically there was a significant difference between the distance they moved. In general, there was no difference to the mean distance traveled between day-time and night-time among males, but the female traveled longer in the day-time than night-time. The length of time needed by each tiger for establishing home range was significantly affected by the abundance of local tigers already in the area. The home range size of each individual tiger estimated using 100% minimum convex polygon (MCP) varies between 67.1 km2 and 400 km2 for males while for the female was 610.3 km2. Estimations of home range size using 95% fixed kernel (FK) methods were between 37.5 km2 and 376.8 km2. Age and sex of translocated tigers as well as the abundance of local tigers and their main prey species did not affect the size of the home range of translocated tigers. The translocated tigers tend to select the majority of land cover type within the landscape as their main habitat, but the forest availability within the landscape remains essensial for their survival. Despite being preliminary the finding of this study highlight the conservation value of tiger translocation and have provide valuable information for improving future translocation of rescued tigers, as this study was the first ever conducted in Sumatra.
Keywords: GPS collars, habitat selection, home range, movement, Sumatran tiger, translocation
Seminar paper can be download here [doc]
Corresponding author : Dolly Priatna <Dolly.Priatna@zsl.org>