Estimation of demographic parameters, spatial distribution of activity and its habitat types used of Javan Surili (Presbytis comata) in Sigedong Forest Block, Ciremai Mount National Park

Abstract

As one of the priority species for conservation in Indonesia, Javan surili is listed as an endangered species (IUCN redlist) and the population trend tends to decrease year by year. A conservation step need to be done and relevant data is needed to guide the management strategy and support its conservation. However the data and information about the population of Javan surili is still limited. The research objectives are to estimate the population of Java surili and identify their activity distribution related to the habitat types used in Sigedong Forest Block, Ciremai Mount National Park. Concentration count methods and camera trap were used to obtain the demographic parameters. Activities trace obtained by direct observation methods, by making line transects (±1km) and vegetation analysis. Chi-square method is used to determine the connectivity between the type of activity and the habitat types used. The result shows that there are nine group of Javan surili with a total 42 individuals. The value of sex ratio is 1:1.31, the birth rate is 0.238, and the mortality rate on teen-adult age class is 0,769. Activities of Javan surili that found during the observation are allelomimetic, ingestive, resting, and shelter seeking. Those activities scattered in lowland forest, sub mountains forest, and mountains forest. The distribution activities divided into four types of vegetation horticultural plantations, fields, forest and undergrowth. Furthermore, the result shows that there is a correlation between Javan surili activity distribution and its vegetation type, seen from the land cover types that used by this species, wherein the fields and undergrowth vegetation no individual was found.