Judul: interspesific crosses between rosy barb (Puntius conchonius) and denisonii (Puntius denisonii) through artificial spawning
Abstrak: Kawin silang merupakan kegiatan dalam pemuliaan ikan untuk meningkatkan keragaman genetik dan menggabungkan beberapa fenotipe. Tujuan penelitian ini mengevaluasi performa kawin silang interspesifik antara ikan barbir dengan ikan denisoni serta karakter fenotipe dan pertumbuhan hibridanya. Penelitian menggunakan metode eksplorasi dengan rancangan acak lengkap, empat perlakuan masing-masing tiga ulangan. Perlakuan berupa persilangan antara ikan barbir betina dengan denisoni jantan (BD) dan resiprokalnya (DB) dibandingkan dengan perkawinan sesama spesies ikan barbir (BB) serta ikan denisoni (DD). Semua pemijahan dilakukan secara buatan dengan induksi hormon. Persilangan DB menunjukkan derajat pembuahan (73,17%), penetasan (72,47%) dan pertumbuhan (7,23%) yang lebih tinggi dibandingkan dengan resiprokalnya (BD), namun tingkat kelangsungan hidupnya lebih rendah (41,78% dan 31,53%). Karakteristik fenotipe hibrida cenderung mewarisi ciri yang dimiliki tetua betinanya.
Keyword: artificial spawning, hybrid, Puntius conchonius, Puntius denisonii, reciprocal

Judul: Hybridization Performance of Denisoni Sahyadria denisonii with Rosy Barb Pethia conchonius
Abstrak: Hybridization can produce offspring with better characteristics than their original parent but the opportunity to be succeed is one of the limiting factors. This study aims to identify the successful of hybridization between denisoni and rosy barb. This study was conducted with exploration method using random design complete (RAL) with treatments: DD (denisoni ♀ >< denisoni ♂), BB (rosy barb ♀ >< rosy barb ♂), DB (denisoni ♀ >< rosy barb ♂), BD (rosy barb ♀ >< denisoni ♂) and 3 repetition. The mating was done artificially using Ovaprim® and stripping. Eggs hatched and the larvae reared for 7 days after hatching. The parameters observed including semen volume, spermatocrit, sperm morphology, motility, viability, fecundity, FR, HR, and SR. Hybridization between denisoni and rosy barb was possible for BD treatment otherwise was impossible with differences towards sperm physiological and morphological characteristics, motility, viability, and fecundity between denisoni and rosy barb, also FR, HR, and SR value was significantly different (P<0,05) between treatments., Hibridisasi dapat menghasilkan benih dengan karakter yang lebih unggul daripada tetuanya namun memiliki keterbatasan berupa peluang keberhasilan dalam melakukan kawin silang. Penelitian ini bertujuan mengidentifikasi keberhasilan hibridisasi antara ikan denisoni dengan ikan barbir. Penelitian ini dilakukan dengan metode eksplorasi menggunakan rancangan acak lengkap (RAL) dengan perlakuan: DD (denisoni ♀ >< denisoni ♂), BB (barbir ♀ >< barbir ♂), DB (denisoni ♀ >< barbir ♂), BD (barbir ♀ >< denisoni ♂) dengan 3 kali ulangan. Pemijahan dilakukan secara buatan dengan bantuan induksi Ovaprim® dan proses stripping. Telur ditetaskan dan larva yang dihasilkan dipelihara hingga 7 hari pascatetas. Parameter yang diamati meliputi volume cairan semen, spermatokrit, morfologi sperma, motilitas, viabilitas, fekunditas, FR, HR, dan SR. Persilangan antara ikan denisoni dan ikan barbir memiliki peluang pada perlakuan BD namun tidak untuk sebaliknya dengan adanya perbedaan terhadap karakteristik fisiologis dan morfologi sperma, motilitas, viabilitas, dan fekunditas antara ikan denisoni dan ikan barbir serta adanya perbedaan yang signifikan (P<0,05) terhadap nilai FR, HR, dan SR antar perlakuan.
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Judul: Utilization of terra/MODIS L1B data for analysis of horizontal wind profile in the troposphere
Abstrak: This study was concerned with horizontal wind derived from data collected with the Moderate-resolution Imaging Spectroradiometer (MODIS) on board the NASA’s Earth Observation System (EOS)-Terra satellite. The aim of this study is to develop a method for the estimation of horizontal wind movement in the troposphere based on Navier-Stokes equation. The method was applied to a calibrated and geolocated Terra/MODIS L1B 1 km data set. The data inputs to estimate surface temperature are retrieved from TIR (Thermal Infrared) bands 31 (10.780 μm to 11.280 μm) and 32 (11.770 μm to 12.270 μm). The obtained surface temperatures were later used to approximate geopotential height on a constant-pressure surface by using the modified Poisson equation. The main assumptions used are the hydrostatic equilibrium, ideal gas law, constant lapse rate and constant acceleration of gravity. Based on the distribution of geopotential height, the pressure gradient force is measured by the gradient of geopotential on an isobaric coordinate to present the horizontal wind profile. For certain topographic areas especially in the mountain ranges, there was a disadvantage of using pressure as a vertical coordinate which lead to inaccuracy. In spite of that, Terra/MODIS L1B data with 1 km spatial resolution can be used to estimate the horizontal wind movement in the troposphere.
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