Judul: Karakteristik Habitat dan Populasi Tarsius (Tarsius fuscus Fischer 1804) di Resort Balocci Taman Nasional Bantimurung Bulusaraung Sulawesi Selatan
Abstrak: Tarsier (Tarsius fuscus Fischer 1804) is one of endemic primates of South Sulawesi, which has been protected by Government Regulation No. 7 of 1999. This species is categorized as vulnerable by the International Union for Conservation of Nature (IUCN) Red List and on Appendix II of the Convention on International Trade in Endangered Species (CITES). The objective of this study were (1) to identify habitat characteristics including physical condition, composition and structure of vegetation and food (insects) availability, (2) to examine the distribution and population of tarsier. This study was conducted in Resort Balocci, Bantimurung Bulusaraung National Park from May to July 2011. The data collected consisting composition and structure of vegetations, the number and diversity of insects, distribution and population size of tarsier. Characteristic of vegetations data was collected using a single swath method. Collection of insects as potential food of tarsier was taken by light trap method and identified in Laboratory of Insect Taxonomy, Plant Protection Department, Faculty of Agriculture, Bogor Agricultural University. Population size was determined using concentration count method around the nesting trees of tarsier. The observations were started at 05.00-07.00 and 16.30-18.00. This study showed that tarsier inhabited secondary forest, plantations and vegetation near the settlement (yard). Nesting trees of tarsier could be observed in the crevices of the rocks, in the cracks of ficus trees (Ficus spp.), sugar palm tree (Arenga pinnata) and bamboos (Bambusa spp.). In addition to the nesting trees, there are Macaranga hispida and Artocarpus altilis. The secondary forest has more insects than plantations and vegetation near the settlement. A total of 112, 89 and 80 individuals of insects recorded in the secondary forest, vegetation near the settlement and plantation respectively. A total of 13 groups consisting of 44 individuals of tarsiers recorded in the study area. There were 31 individuals in secondary forest, 9 individuals in plantation and 4 individuals in vegetation near the settlement. Population densities of tarsier were 151 individuals/km2 in the secondary forest, 36 individuals/km2 in the plantation and 23 individuals/km2 in the vegetation near the settlement.
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Judul: Karakteristik Habitat Preferensial Tarsius (Tarsius tarsier) di Taman Nasional Bantimurung Bulusaraung, Maros, Sulawesi Selatan
Abstrak: Tarsius tarsier was reported to occur throughout the island of Sulawesi and several small adjacent islands around it. For effective conservation, a detailed knowledge of the habitat requirements and preferences of the species concerned is needed. The presence of tarsier population and its habitat characteristics in Bantimurung Bulusaraung National Park are not clearly known. The habitat quality and space have been decreasing due to the increasing of human activities. This study that was carried out in Pattunuang Resort from Desember 2009 to Pebruari 2010, aimed to analyze the relationship between the existence of tarsier and its habitat characteristics, and to determine habitat preferences of tarsiers in the study area. The results showed that the tarsier was found on flat to steep topography with slope gradient reached 38%. The densities of plants at various of structure vegetation were higher in Blok Pute. Plant diversity was generally significantly different in each location. The abundance of insect species richness was highest in Blok Pattunuang among other location with pattern distribution were clumped. Based on the index of Neu, Tarsius tarsier preferred bamboo habitats to the secondary forest and karst vegetation to maintain their viability in this area.
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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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