Judul: Penelusuran Keaslian Ikan Guppy (Poecilia reticulata) berdasarkan Marka Genetik COI (Cytochrome Oxidase Subunit I) sebagai Dasar Pengelolaan
Abstrak: Guppy merupakan ikan air tawar hias. Variasi tinggi dalam karakter morfologi disebabkan oleh distribusi yang luas dan perkawinan silang genetik. Selain itu adanya fenomena kriptik dan kompleks spesies mengarah pada kesalahan identifikasi. Penelitian ini bertujuan untuk mengidentifikasi karakter gen molekuler cytochrome oxidase subunit I (COI) pada ikan guppy (Poecilia reticulata) dari Bogor dan Bandung. Penelitian ini menunjukkan bahwa ikan guppy Bogor dan Bandung terpisah secara genetik. Ikan guppy Bogor dan Bandung cenderung berasal dari nilai sumber genetik yang berbeda dengan jarak genetik sebesar 22,24%. Hal ini membuktikan bahwa ikan guppy Bogor dan Bandung merupakan spesies yang berbeda dari dasar gen COI.
Keyword: Gen COI, guppy, perbedaan genetik, Poecilia reticulata

Judul: Keragaman Genetik Ikan Kiper (Scatophagus argus) Berdasarkan  Marka Gen 16s rRNA di WPP 573 Bagian Barat sebagai Dasar Pengelolaan
Abstrak: Ikan kiper (Scatophagus argus) merupakan salah satu ikan demersal yang memiliki nilai ekonomis penting, ikan ini dijadikan sebagai ikan konsumsi dan ikan hias. Ikan kiper juga merupakan ikan yang aktif bermigrasi sehingga memungkinkan adanya perpindahan genetik dari perairan yang berbeda. Penelitian ini bertujuan untuk menganalisis keragaman genetik ikan kiper di WPP 573 Bagian Barat berdasarkan marka gen 16s rRNA sebagai pengelolaan sumberdaya yang berkelanjutan. Hasil amplifikasi menunjukkan amplicon dengan pita untaian tunggal namun masih terdapat smear akibat adanya kontaminan. Hasil sekuensing dan validasi BLASTn menunjukkan bawah seluruh contoh sampel ikan kiper termasuk ke dalam spesies Scatophagus argus dengan persen identifikasi sebesar 99,51 sampai dengan100%. Hasil penelitian menunjukkan bahwa antar sampel ikan kiper memiliki hubungan kekerabatan yang sangat dekat, namun populasi ikan kiper tergolong ke dalam kategori tidak baik karena tingkat keragaman yang rendah., Spotted scat (Scatophagus argus) is one of the demersal fish that has important economic value, this fish is used as a consumption fish and ornamental fish. It is also an active migratory fish that allows genetic transfer from different waters. This study aims to analyze the genetic diversity of Spotted scat in WPP 573 West Part based on 16s rRNA gene markers as a sustainable resource management. Amplification results show amplicon with single strand band but there are still smears due to the presence of contaminants. The BLASTn sequencing and validation results showed that all Spotted scat samples belonged to the Scatophagus argus species with a percent identification of 99.51 until100%. The results showed that the Spotted scat samples had a very close kinship relationship, but the population of spotted scat was classified into the unfavorable category because of the low level of diversity.
Keyword: Gen 16s, Genetic diversity, Scatophagus argus

Judul: Thermal Characteristics and Dynamics of Tropical Cyclone over Western North Pacific Ocean: A Case Study of Typhoon Songda (Chedeng) 2011
Abstrak: The frequent occasion of Tropical Cyclone (TC) over Western North Pacific (WNP) Ocean lies from 10˚N to 26˚N and 121˚E to 170˚E. Sources of TC development come from warm ocean temperature where latent heat is released during condensation processes and subsequently concentrated in the boundary layer. Relative humidity at 850-700 hPa is responsible to produce the most intense storm. Meanwhile, weak vertical wind shear between 850-200 hPa is one of the dynamical factors that lead to the development of TC. Pressure level of 850-200 hPa is chosen to minimize the thermodynamic effect in the lower troposphere. Typhoon Songda (Chedeng in the Philippines) or TSC lasted from May 18th to 30th, 2011 and strengthened into powerful Super Typhoon stage between May 24th and 27th. Long curving track and the exhibition of all sequences of TC life cycle, TSC is then considered as an ideal case of TC. The objective of the study with case of TSC is to investigate the role of thermal characteristics and dynamics on TC intensity. The research is carried out by using Advanced Research of Weather Research and Forecasting model (WRF ARW model) version 3.3. Two domains are employed in the model. The first domain situate from 02˚N to 40˚N and 118˚E to 149˚E and cover spatial resolution () of 33.1 km. The second domain situate from 09˚N to 27˚N and 119˚E to 132˚E with of 11 km. Timestep of the model () is 120 seconds. The model is supported by the following physical parameterization, i.e., Yonsei University Scheme (YSU) in the boundary layer, Kain-Fritsch scheme (KF) in the cumulus, and WRF Single-Moment 3-class scheme in the microphysics. Initial meteorological condition prior to the formation of the cyclone is generated using WRF ARW standard-release model. Sensitivity of the model output is obtained from a selected single-parameter change scenarios, namely, 10 % to 20 % decrease and increase of wind shear initial data at 850-200 hPa, and by 10 % to 20 % decrease of relative humidity initial data at 850-700 hPa. The result showed that the negative correlations between wind shear and intensity are found in wind shear scenarios. Wind shears of 10 ms-1 which lead to strengthening of the wind intensity in the early period of Typhoon development are found in wind shear scenarios. The effect of wind shear changes on wind intensity is statistically significant in the 20 % wind shear scenarios. During mature stage, weak wind intensity occurred when wind shear increase as given in the WRF standard-release and the 20 % decreasing scenario. Different situation is found in the 20 % increasing scenario where wind shear tend to weak and lead to strong wind intensity at this stage. Meanwhile, the reduction of moisture supply at 850-700 hPa resulting from 20 % decreasing relative humidity play a major role in the weakening of wind intensity and reduces mechanical energy of the cycle process as much as 300 J kg-1.
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