Judul: Perilaku Makan Gorila (Gorilla gorilla gorilla ) Di Pusat Primata Schmutzer Taman Margasatwa Ragunan Jakarta
Abstrak: Gorilla merupakan hewan diurnal teresterial. Makanan gorila berupa dedaunan dan buah, serta sedikit makanan berupa serangga. Penelitian ini bertujuan untuk mengidentifikasi perilaku harian dengan penekanan terhadap perilaku makan di dalam penangkaran Pusat Primata Schmutzer Jakarta. Pengamatan perilaku dengan metode focal animal sampling, dan ad libitum sampling. Hasil penelitian ini menunjukan bahwa persentase makan dan istirahat gorila lebih besar dibandingkan dengan perilaku lainya, yaitu 34,06% dan 29,32%. Hal ini dikarenakan gorila memiliki ukuran tubuh yang besar, sehinga waktunya lebih banyak dihabiskan untuk makan dan istirahat. Perilaku makan meningkat pada pukul 09.00, 12.00, dan 15.00. Persentase gorila mengambil pakan cenderung satu persatu 26,37%, pegang dengan satu tangan 17,69%, dan merobek dengan menggunakan gigi 24,19%. Posisi makan gorila lebih besar dengan duduk64, 36%, dan berbaring 27,10%.
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Judul: Aktivitas Makan dan Status Gizi Owa Jawa (Hylobates moloch) di Pusat Primata Schmutzer Taman Margasatwa Ragunan Jakarta
Abstrak: Hylobates moloch is endemic Indonesian primate which live in Java. The population of javan gibbon is declining because of the loss of feeds due to the degradation of habitats. This research aims to identify feeding activities, type of feeds, and nutrient status of javan gibbon (Hylobates moloch) in Schmutzer Primate Centre Ragunan Zoo Jakarta. Feeding activities observation was performed using focal animal sampling method which done in the same time with feed palatability. Feeds were given once a day which consist of fruits, vegetables, eggs, and bread. Highest feeding activities was recorded in the feeding given by zoo keeper. Biting and swallowing are the highest was shown Kecil (juvenile) feeding activities of first cage (22.00%). Highest feeding activity in second cage made by Rano (male) was chewing (21.43%) and in the third cage was carried out by Eneng (female) which were biting, chewing, and swallowing each 23.31%. Based on the palatability rank in the three cages, kumak (Lactuca indica) and banana (Musa paradisiaca) was categorized as the most favored feed. Based on the nutrient status, it was obtained that dry materials were consumed 683,83 to 1099,03 g/cage/day, protein consumption 13,13 to 19,37 g/cage/day, fat consumption 4,58 to 8,51 g/cage/day, and energy consumption from 594,64 to 1154,50 kal/cage/day.
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Judul: Penggunaan Metode Homotopi untuk Menyelesaikan Persamaan KdV (Korteweg-de Vries)
Abstrak: Natural phenomena can be explained using nonlinear mathematical models. In this paper, we studied the solution of KdV equation using the Homotopy method. The KdV equation is used for describing both surface and internal waves. One of the solutions is called a solitary wave. The use of homotopy method to solve the KdV equation required a nonlinear operator which was determined by the nonlinear form of the KdV equation itself. Based on this operator, a recursive formula was obtained to get a sequence of the KdV solution. The higher the sequence order of the sequence used, the closer to the exact solution of the KdV equation.
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