Judul: Penetasan Telur, Pertumbuhan dan Pendugaan Umur Anakan Tokek (Gekko gecko Linnaeus, 1758) di Penangkaran
Abstrak: Tokay gecko (Gekko gecko, Linnaeus 1758) is one of the wildlife species that has long been used as an export commodity, the demand is likely to increase from year to year. This utilization pattern during rely more on direct capture from the wild. Although the kind that are not protected, but as an effort to control the possible threat of extinction, the Indonesian government legally through the Ministry of Forestry set quota utilization. For example, in 2008 the total quota of 45,000 legally trade chief alive (Dephut 2008), but the estimated number of illegal trade is much larger (PT Mega Citrindo press con. 2012). However, studies on age estimation juvenil G.gecko are still rare. Age and body size is also one of the important basic information known at the G.gecko breeding attempt in captivity as a ba-gian of the effort to combat the possible threat of extinction due to excessive use directly from nature. Basis for breeding in captivity G.gecko among others, must be based on knowledge of age and body size when it reaches sexual maturity (sexual-maturity) or age of first marriage (minimum breeding age). In addition, basic information on age and body size is also indispensable as a reference within either set magnification program to meet the demand for body size and export standards for the benefit of the breeding program settings (reproduction) in captivity G.gecko appropriately and effectively. The first results of the measurements made to answer the question bagimanakan description G.gecko eggs hatching process. The second is to Know G.gecko growth of ages 0 to 8 weeks. Third at me morphometric variables determine the most dominant and significant as age estimators juvenil G.gecko. Data were analyzed descriptively quantitative. The initial steps to determine the growth of the seedlings with eggs hatch G.gecko, because one of the conditions assumed age is to know the age of the animals. Hatching is done with the help of a conventional 11 watt lamp with a temperature of 29 ° C. Seedling (juvenile) G.gecko hatch 15-26 days later. Morphometric parameter measurements performed using manual calipers and digital balance. Temperature measurement is done with the help of dry-wet thermometer. Morphometric parameters of size juvenil are much smaller than adults. To estimate the most dominant parametri morphometry in chicks aged suspect at the age of 8 weeks, then be measured against the morphometric parameters Mouth 8 Length (ML), Snout vent length (SVL), humerus length (HL), Radius Length (RL), axilla groin (AG), femur length (FL), Tibia Length (TL) and Body Weigth (BW). Mean initial measurement of the 8 consecutive morphometric parameters ML, SVL, RL, HL, AG, FL, TL and BW namely 4.63 cm, 1.62 cm, 0.58 cm, 0.59 cm, 2.61 cm, 0.80 cm, 0.84 cm, 3.05 g. Results of initial measurements show, that the SVL reaching the highest size and RL occupy the lowest size. Body dimensions increase is more significant in juvenil than adults. Measurement results selamaa 8 weeks is known that, all parameters have added size every week. The average increase in the measurement of the ML, SVL, RL, HL, AG, FL, TL and
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Judul: Morphometrics and Body Color Characteristics of Male and Female Tokay Gecko (Gekko gecko)
Abstrak: Tokek rumah (Gekko gecko) merupakan reptil dari famili Gekkonidae yang bernilai ekonomi tinggi jika telah mencapai berat dan ukuran tubuh tertentu. Tingginya permintaan ekspor tokek rumah sebagai bahan obat-batan mengakibatkan perburuan tokek rumah menjadi tidak terkendali. Saat ini status tokek rumah menjadi Appendiks II. Perlu dilakukan pembudidayaan tokek rumah yang dimulai dari pengenalan morfometrik dan karakteristik tokek rumah guna mencegah perburuan yang tidak terkendali. Penelitian ini bertujuan mengamati perbedaan ukuran morfometrik tokek jantan dan betina, serta karakteristik warna tubuh tokek rumah (Gekko gecko) berupa warna dasar kulit, bintik, dan garis batas. Penelitian dilakukan dengan 10 ekor tokek jantan dan 10 ekor tokek betina. Penelitian menggunakan metode T-test untuk menganalisis data morfometrik dan metode deskriptif untuk menganalisis data karakteristik warna tubuh tokek. Hasil penelitian menunjukkan adanya perbedaan morfometrik antara tokek jantan dan betina yang terdapat pada ketebalan pangkal ekor, lebar dan panjang kepala, panjang moncong hingga kloaka, serta pada karakteristik warna tubuh., The tokay gecko (Gekko gecko) is a reptile from the Gekkonidae family which has high economic value when it reaches a certain body weight and size. The increased demand for the tokay gecko's export as a medicinal ingredient resulted in the hunting of the house gecko getting out of control. Currently, the tokay gecko's status became Appendix II. It is necessary to breeding tokay geckos starting from the introduction of morphometrics and characteristics of tokay geckos to prevent uncontrolled hunting. This study aims to observe differences in the morphometric sizes of male and female tokay geckos and the body color characteristics of the tokay gecko (Gekko gecko) in the form of primary skin color, spots, and outlines. The study was conducted with 10 male and 10 female tokay geckos. The study used the T-test method to analyze morphometric data and descriptive approaches to analyze data on the tokay gecko's body color characteristics. The results showed morphometric differences between male and female tokay geckos in the thickness of the tail base, head width and length, snout vent length, and body color characteristics.
Keyword: body color, body size, morphometric, reptile, tokay geckos

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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