UI - Tesis Membership :: Kembali

UI - Tesis Membership :: Kembali

Studi pendahuluan : Sebaran dan aktivitas harian Orangutan Sumatera (Pongo abelii) di Cagar Alam Dolok Sibualbuali, Tapanuli Selatan, Sumatera Utara

(Universitas Indonesia, 2004)

 Abstrak

Sumatran orangutans which are found in the Province of Nangroe
Aceh Darussalam and North Sumatra Province are fragmented into four
populations. One of the population occurs in Angkola, a forested area located
in the southern part of Lake Toba. This population is considered to be small
and narrowly distributed. Our survey shows that individual orang utan appear
in and in the vicinity of the Dolok Sibualbuali Nature Reserve. This indicates
that orangutans can adapt to fragmented habitats, such as are found near
Dolok Sibualbuali Nature Reserve, South of Tapanuli, North Sumatra.
The preliminary study was conducted April 2002 - January 2003. This
study recorded the distribution and the daily activities of orangutans in Dolok
Sibualbuali Nature Reserve. Repeated crisscrossing surveys and focal
animal observation were used to document orangutan distribution and daily
activity.
Human activities are the main factor for the loss of orangutan habitat.
Illegal logging, forest conversion for timber concessions and plantations, road
construction and settlement constitute the main factors for forest loss. This
forces orangutans out of their native habitat and makes them vulnerable to
extinction.
Based on direct sightings, orangutan are found at Aek Nabara and
Sitolu. Moreover, the presence of orangutans is indicated by nests at the
Sihulambu and Bulu Mario sites. The orangutan population is not evenly
distributed but seems to be present at locations with food resources.
Seven individuals were chosen as focal animals. They consisted of 3
adult females, 3 sub-adult males and 1 juvenile. Total observation time was
757 hours and 40 minutes. Feeding, moving, resting, nesting and social
activities were the main activities that were recorded. Orangutans spent their
daily activity budgets: feeding (42.29%), moving (16.47 %), resting (37.41%),
nesting (1.89%) and social contact (1 .93%). Orangutans spent much of their
time (42.29%) feeding, particularly when food resources were abundant. Due
to their large body size, food consumption was high.
There are 115 types of orangutan food consisting of fruits (36.6%),
flowers (3.89%), leaves (28.33%), bark (17.7%) and pith/stem (11.67%), and
other food types (insects, honey, etc.) (1 .67%). Fruit is the main source of
orangutans food.
We concluded that the distribution and daily activity of orangutans at
Dolok Sibualbuali Nature Reserve was very much influenced by the
availability of food, particularly fruit. When favored fruit is abundantly
available, orangutans will constantly consume that fruit and visit fruit trees of
the same species in other locations. Orangutans will also search out other
food in community farms near the Nature Reserve when forest fruit availability
is less, leading to conflict with local people.

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 Metadata

Jenis Koleksi : UI - Tesis Membership
No. Panggil : T11674
Program Studi :
Subjek :
Penerbitan : [Place of publication not identified]: Universitas Indonesia, 2004
Bahasa : ind
Sumber Pengatalogan :
Tipe Konten :
Tipe Media :
Tipe Carrier :
Deskripsi Fisik : xiv, 70 hlm. : ill. ; 30 cm. + lamp
Naskah Ringkas :
Lembaga Pemilik : Universitas Indonesia
Lokasi : Perpustakaan UI, Lantai 3
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No. Panggil No. Barkod Ketersediaan
T11674 TERSEDIA
Ulasan:
Tidak ada ulasan pada koleksi ini: 20235747
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