Judul: Analisis Palatabilitas dan Kecernaan Pakan Kukang (Nycticebus coucang) dan Tarsius (Tarsius sp.) di Penangkaran Pusat Studi Satwa Primata IPB
Abstrak: Kukang (Nycticebus coucang), Tarsius spectrum, dan Tarsius bancanus merupakan primata primitif (Prosimii) dari famili Lorisidae dan Tarsiidae yang hidup dan dilindungi di Indonesia, sehingga untuk menjaga kelestarianya diperlukan upaya konservasi yang salah satunya adalah kajian pakan. Penelitian ini bertujuan untuk mengetahui kandungan nutrisi, palatabilitas, konsumsi serta kecernaan pakan satwa tersebut di fasilitas penangkaran. Penelitian dilakukan dengan menggunakan 4 ekor Tarsius bancanus dan 6 ekor Tarsius spectrum yang diberi pakan ulat dan jangkrik, serta 6 ekor kukang yang diberi pakan jangkrik, pisang, manggis dan telur ayam dengan menggunakan metode bebas pilih (kafetaria). Hasil penelitian menunjukkan campuran pakan Tarsius dan kukang memiliki kandungan protein yang tinggi yaitu sebesar 10.4% dan 63.5%. Tarsius bancanus, Tarsius spectrum, dan kukang memiliki konsumsi rata-rata protein kasar sebesar 0.46±0.06 g/ekor/hari, 0.38±0.07 g/ekor/hari, dan 16.14±1.92 g/ekor/hari. Koefisien cerna protein kasar pada Tarsius bancanus dan Tarsius spectrum sebesar 78.93±1.73%, dan 78.17±3.90%. Kukang mampu mencerna pakan dengan baik, dibuktikan dengan koefisien cerna bahan kering dan nutrien di atas 90%. Penelitian ini dapat disimpulkan bahwa kukang dan Tarsius memiliki palatabilitas yang tinggi terhadap pakan segar dan kecernaan yang baik terhadap protein dan lemak.
Keyword: Kecernaan, Kukang, Nutrisi, Palatabilitas, Tarsius

Judul: Analysis of the Eating Behavior on Tarsiers (Tarsius spectrumgurskyae) in Captivity at Primate Research Center IPB University.
Abstrak: Tarsius spectrumgurskyae merupakan satwa endemik Indonesia yang rentan terhadap ancaman kepunahan, sehingga diperlukan evaluasi perilaku makan di penangkaran sebagai upaya pelestarian konservasi ex-situ. Penelitian ini bertujuan menguraikan pola perilaku makan T. spectrumgurskyae di penangkaran Pusat Studi Satwa Primata Institut Pertanian Bogor melalui pengamatan tidak langsung. Penelitian dilakukan terhadap video hasil rekaman kamera closed circuit television (CCTV) pada 3 ekor T. spectrumgurskyae dewasa dengan metode focal animal sampling di kandang konservasi PSSP IPB. Hasil pengamatan menunjukkan perilaku makan memiliki persentase rataan sebesar 2,62±0,46% dari keseluruhan perilaku harian. Pola perilaku makan bervariasi, dimulai dari pergerakan mendekati dan menjauhi pakan yang terdiri dari quadrupedal walking, climbing, dan jumping. Tarsius menangkap mangsa dengan mulutnya. Posisi makan tarsius terdiri atas posisi duduk, berdiri, dan vertical clinging. Cara tarsius memakan mangsa: dipegang dengan 1 atau 2 kaki depan dan dikunyah tanpa dipegang. Lokasi makan yang digunakan tarsius adalah ranting pohon, kotak pakan, tempat minum, sarang, dan dinding kawat. Pola perilaku makan didominasi oleh pergerakan mendekati pakan quadrupedal walking, posisi makan duduk, mangsa dipegang dengan 1 kaki depan, dan berlokasi di ranting pohon. Frekuensi makan dan minum tarsius mengalami peningkatan pada sore dan pagi hari, mengalami fluktuasi pada malam hari, serta beristirahat pada siang hari., Tarsius spectrumgurskyae is a vulnerable endemic species of Indonesia, therefore it is necessary to evaluate its eating behavior in captivity. The aim of this study was to describe the eating behavior pattern of T. spectrumgurskyae in captivity at the Primate Research Center of IPB University. The study was conducted by performing focal animal sampling on video recordings of 3 adult T. spectrumgurskyae to collect behavior activity budgets. The results showed that eating behavior had an average percentage of 2.62±0.46% from the total daily behavior. The pattern of eating behavior includes the movement toward and away from the feed, which consisted of quadrupedal walking, climbing, and jumping. Tarsiers caught prey with their mouths, followed by an eating position consisted of sitting, standing, and vertical clinging. The tarsiers were found to eat their prey by exhibiting the following activities: grasping with 1 or 2 forelegs and chewing the prey without being held. The eating locations were tree branches, feed boxes, drinking containers, nests, and wire walls. The pattern of eating behavior was dominated by the movement of approaching the feed by quadrupedal walking, sitting position, holding prey with one front leg, and located on a tree branch. The frequency of eating and drinking of tarsiers increased in the afternoon and morning, fluctuated at night, and they rested during the day.
Keyword: green avtur, hidrodekarboksilasi, hidrodeoksigenasi, katalis, minyak jelantah

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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