Preferensi dan Kandungan Nutrisi Pakan Orangutan Sumatera (Pongo abelii Lesson, 1827) di Stasiun Penelitian Hutan Lindung Batang Toru, Tapanuli Tengah, Sumatera Utara
SUMMARY
FITROTUL AINI. E34070010. Feed Preferences and Nutrition of Sumatran
Orangutan (Pongo abelii Lesson, 1827) in the Research Station of Batang Toru
Preservation Forest, Central Tapanuli, North Sumatra. Under Supervision of
YANTO SANTOSA AND LIN NURIAH GINOGA.
Orangutans have the nature of being selective for their foods. One factor of
their selectivity is their preference for food. The abundance of a certain feed tree is
not necessarily preferred by orangutans. Therefore, research on food preferences of
orangutans is necessary to identified the availability in the nature. Nutrient content of
the feed should also be identify, since nutrient would affect the appearance, welfare,
production, and health of orangutans.
The research was conducted on June - August 2011 at the research station of
Batang Toru Preservation Forest. Focal time sampling was used with 2 minutes
interval on a single individual of orangutan. Primary date consist of number of
encounter, daily activity, food preference, feed availability, and nutrient content of 7
feed samples. Secondary data consists of temperature, climate, and the general
condition of Batang Toru Preservation Forest. SPSS 16.0 software was used in data
processing, while Nue Index was used to analysis food preferences of orangutan.
As many as 28 encounters with orangutans were recorded on 5 male individuals
and 2 female individuals. Orangutans was observed during the activities of eating
(39.31%), moving (31.23%), resting (27.58%) and other activities (1.87%). Fruit was
the part of the plant mostly used by the orangutans with a percentage of 62.59%.
Among 27 tree species observed, there were 10 species preferred by the orangutans,
namely Eurya nutida, Tetrameristra glabra, Naigea neriifolium, Syzygium sp., Ficus
sp., Rodhomirtus tomentosa, Agathis borneensis, Dacrycarpus imbricatus, Garcinia
parvifolia, and Gironniera subaequalis. The Important Value Index for preference
species was low with the value of
FITROTUL AINI. E34070010. Feed Preferences and Nutrition of Sumatran
Orangutan (Pongo abelii Lesson, 1827) in the Research Station of Batang Toru
Preservation Forest, Central Tapanuli, North Sumatra. Under Supervision of
YANTO SANTOSA AND LIN NURIAH GINOGA.
Orangutans have the nature of being selective for their foods. One factor of
their selectivity is their preference for food. The abundance of a certain feed tree is
not necessarily preferred by orangutans. Therefore, research on food preferences of
orangutans is necessary to identified the availability in the nature. Nutrient content of
the feed should also be identify, since nutrient would affect the appearance, welfare,
production, and health of orangutans.
The research was conducted on June - August 2011 at the research station of
Batang Toru Preservation Forest. Focal time sampling was used with 2 minutes
interval on a single individual of orangutan. Primary date consist of number of
encounter, daily activity, food preference, feed availability, and nutrient content of 7
feed samples. Secondary data consists of temperature, climate, and the general
condition of Batang Toru Preservation Forest. SPSS 16.0 software was used in data
processing, while Nue Index was used to analysis food preferences of orangutan.
As many as 28 encounters with orangutans were recorded on 5 male individuals
and 2 female individuals. Orangutans was observed during the activities of eating
(39.31%), moving (31.23%), resting (27.58%) and other activities (1.87%). Fruit was
the part of the plant mostly used by the orangutans with a percentage of 62.59%.
Among 27 tree species observed, there were 10 species preferred by the orangutans,
namely Eurya nutida, Tetrameristra glabra, Naigea neriifolium, Syzygium sp., Ficus
sp., Rodhomirtus tomentosa, Agathis borneensis, Dacrycarpus imbricatus, Garcinia
parvifolia, and Gironniera subaequalis. The Important Value Index for preference
species was low with the value of