ARIF SETIAWAN1,♥, DJUWANTOKO1, A.W.BINTARI.2, Y.W.C.KUSUMA2, S.PUDYATMOKO.1 M.A.IMRON1,

1 Research Division of Wildlife Laboratory Faculty of Forestry Gadjah Mada University

2 KP3 Primata (Primate Study Club Faculty of Forestry Gadjah Mada University

ABSTRACT

Javan fuscous leaf monkey (Presbytis fredericae Sody,1930) is one of an endemic and endangered leaf eating monkeys that still exist and living in several patchy forests in Central of Java. Survey of this monkeys was done in the Southern section slope of Mount Slamet areas (36, 6559 km2), Central Java, Indonesia. Direct observation methods using distance sampling was applied to estimate the population number of these monkeys. The survey was conducted during dry season, on May to June, 2005. Result of the population estimation size using DISTANCE 5.0 computer program within uniform key and hermite polynomial adjustment was 219 individuals, and population density was estimated around 5.96 individual/km2 (CV = 75.72%; 95% CI = 1.2466 – 28.532).

Key words: (Presbytis fredericae), population and distribution, Mt.Slamet Indonesia

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