Phytochemical examination of the leaves of Psydrax ficiformis Hook. f.
Bridson. - an endangered tree

Abstract :

Seven detection function models used in line transect sampling for estimating herbivore densities were evaluated using data from tropical moist deciduous forests. The data were collected from nine Wildlife Sanctuaries in Kerala during 1993 on the following species viz., elephant (Elephas maximus), gaur (Bos gaurus) and sambar (Cervus unicolor). Univariate half normal distribution was found promising with respect to accuracy and precision of the density estimates. The use of median in estimating average cluster size reduced animal densities to realistic values and provided more precise estimates. Bivariate detection function models were not effective as the size-bias parameter was not significant for most of the models considered.