Our vanishing relative: The status of wild orang-utans at by H.D. Rijksen

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By H.D. Rijksen

The orang-utan is an excellent consultant of a massive zone of the constitution of organic variety in Sumatra and Borneo. Conservation of the residing stipulations of the orang-utan implies retaining the integrity of the complete traditional environment of indigenous plant and animal species often called the West Malesian rainforest, i.e. the traditional tropical evergreen forests of special floral composition which stretch from the isthmus of Kra, in Thailand, throughout peninsular West Malaysia, south and eastwards, together with Sumatra, Borneo and Java. the most query at the back of this examine is: what's the present prestige of the orang-utan? Or in different phrases: • what's the present geographical distribution variety? • what were the traits within the dimension of its diversity and numbers? • to what volume is that this variety lined through (a) conservation components, (b) timher concessions (i.e. transformed habitat) and (c) plans for conversion (i.e. obliteration of the habitat)? • what's the present caliber of habitat during this variety and what's the possibility for conservation or recovery of such habitat? • what's a believable commonplace density of the ape in such habitat? • what are the clients for defense of the ape? • what may still and will be clone to provide the ape an opportunity of survival? numerous activities have been undertaken to discover solutions to those questions, and the most important effects are: • In Sumatra the orang-utan has a way more vast variety than was once hitherto

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Additional resources for Our vanishing relative: The status of wild orang-utans at the close of the twentieth century

Sample text

The rnainland population was possibly extinct before the first western explorers charted the coasts; the Javan population may have vanished as late as the 17th century (Dobson, 1953-54). All that was believed to have remained at the beginning of the twentieth century were two significant subpopulations: one - the largest - on the island ofBorneo, the other mainly in the northern and western part of the island of Sumatra. Jnct waves of archatC people entered the Sundaland reg1on during the mtddle Pleistocene.

Local informants reported that orang-utans occurred in the swamp forests near Kota Badak (north ofPakanbaru) and near Sungei Kampar (south of Pakanbaru, in Riau province). In 1986, the French forest ecologist Y. Laumonier sighted an orang-utan and numerous nests in the forests on the slopes of Gunung Talamau (Gn. Ophir) (pers. ). e. the northwestern section of West Sumatra province on the equator), as weil as with the Baruman reserve along the border with Riau province. It is the habitat of the southern extension of the Angkola population, and was formerly famous for its orang pendek sightings.

The Way Hitam water catchment. In 1934, Mededeelingen No 10 of the Netherlands Commission for International Nature Proteerion contained a review published as a result of an inquiry in 1932 among a number of colonial contacts, which tried to establish the distribution of certain unique species and to explore the need for their protection in 'reserves'. In a special supplement to these Mededeelingen, published in 1935, Heynsius-Viruly and van Heurn presented an update of these results, including a map of the historical and current distribution of the red ape.

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