| Summary: | 碩士 === 國立屏東科技大學 === 野生動物保育研究所 === 100 === Absolute population size is crucial information for wildlife conservation and management. In Taiwan, there has been no practice of absolute population size estimation for mid- to large-sized wildlife. This research estimated the absolute population size and density of Formosan Sambar（Rusa unicolor swinhoii）using capture-mark-recapture model around the upstream of Lakuyin river and Bushin camp in Yushan National Park. Infrared-triggered camera was used for trapping and individual identification. The aims of this research were to 1) discuss methods of operation and how to deal with camera trapping data such as occasion definition and estimation model selection, 2) reveal the density of Formosan Sambar, and 3) evaluate the feasibility of this population estimation method.
Results showed that 6 a.m. was the best starting point of an occasion. The optimal length of a trapping occasion was 2 days at Buxin camp when cameras were distributed concentrically. Models Mh(JK1) and Mh(SC2) performed the best for data from Buxin, and estimated population size of adult bucks were 14.3 ± 2.3 and 14.4 ± 4.7, respectively. Bucks consisted of 27.9 ± 0.4 % of total captures. Average maximum moving distance was 402.4 m and effective area was 0.63 km2. Density of adult Formosan Sambar were 81.2 ± 13.3 individuals km-2 by Mh(JK1) and 81.8 ± 16.8 km-2 by Mh(SC2). The optimal length of a trapping occasion was 12 hours at Lakuyin River shelter when cameras were set as a grid. Model M0(CMLE) performed the best for data from Lakuyin. In this area, estimated population size of adult bucks were 206.8 ± 55.1 and effect area was 15.2 km2. Density of adult Formosan Sambar was 48.69 ± 12.98 individuals km-2. This research showed that camera trapping along with capture-mark-recapture model is feasible for estimating population size and density of Sambar deer and model Mh sould be considered for the optimal result.
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