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: The Performance of Male Tokay Geckos by Providing Different Condition of Crickets As Feed, The Performance of Male Tokay Geckos by Providing Different Condition of Crickets As Feed
Abstrak: Tokek rumah (Gekko gecko) adalah hewan reptil satwa harapan yang mempunyai potensi untuk dikembangkan. Saat ini populasinya terancamakibat perburuan liar sehingga perlu dibudidayakan. Penelitian ini bertujuan untuk menganalisis performa tokek jantan (ukuran morfometri dan pertambahan bobot badan) yang diberi pakan jangkrik pada kondisi berbeda. Peubah yang diamati adalah pertambahan morfometrik dengan parameter berupa tail length (TL), base of tail (BT), body length (BL), femur length (FL), radius length (RL), humerus length (HL), width of head (WH), length of head (LH), snout-vent length (SVL), dan produktivitas (pertambahan bobot badan). Penelitian ini menggunakan 20 ekor tokek jantan yang diambil dari alam dan dipelihara selama 42 hari dengan pemberian jangkrik pada kondisi berbeda. Data penelitian dianalisis menggunakan statistik deskriptif, uji-T berpasangan dan uji-T tidak berpasangan. Hasil menunjukan bahwa pemberian jangkrik pada kondisi pakan bergerak memberikan pertambahan pada ukuran morfometrik dan bobot badan sedangkan pada kondisi pakan diam mengalami penyusutan., The domestic tokay gecko (Gekko gecko) is a hopeful animal reptile that has the potential to develop, whose population is currently threatened by wild hunting so it needs to be cultivated. The study aimed to analyze the performance of male tokek (morphometric measurements and body weight gains) given to an anchor in different conditions. The observed variables are morphometric additions with parameters such as tail length (TL), base of tail (BT), body length (BL), femur length (FL), radius length (RL), humerus length (HL), width of head (WH), length of head (LH), snout-vent length (SVL), and productivity. The study used 20 males who were taken from nature and kept for 42 days with anchorage in different conditions. The research data was analyzed using descriptive statistics, pairs-T tests and non-pairs T tests. The results showed that the administration of anchorage in moving feed conditions resulted in an increase in morphometric size and body weight while in non-moving feed conditions there was a shrinkage.
Keyword: criket, feed, morphometric, productivity, tokay gecko

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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