Judul: Aspek Reproduksi Ikan Baji-Baji (Grammoplites scaber (Linnaeus, 1758)) di Perairan Pesisir Mayangan, Subang, Jawa Barat
Abstrak: Ikan baji-baji (Grammoplites scaber) merupakan hasil tangkapan sampingan di perairan Mayangan, Subang, Jawa Barat. Walaupun pemanfaatan terhadap ikan ini masih sangat terbatas namun tersimpan potensi sebagai alternatif bahan pangan. Tujuan penelitian ini adalah untuk menganalisis aspek-aspek reproduksi ikan baji-baji di perairan Mayangan, Subang, Jawa Barat. Selanjutnya informasi ini dapat digunakan sebagai dasar terhadap pengkajian sumberdaya dan pengelolaannya secara optimal.
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Judul: Makanan Ikan Baji-baji (Platycephalus indicus Linnaeus, 1785) Di Perairan Teluk Pabean, Jawa Barat
Abstrak: Ikan baji-baji termasuk famili Platychepalidae yang hidup di dasar perairan dan biasanya ditemukan di daerah pesisir dan estuari berlumpur atau pasir. Penelitian ini bertujuan untuk menganalisis makanan ikan Platycephalus indicus. Pengambilan contoh dilakukan sebulan sekali dari bulan Maret – Desember 2015. Ikan diambil dengan menggunakan jaring dan sero. Jaring ditebar di tiga zona pengambilan contoh selama 60-90 menit. Sero dioperasikan oleh nelayan pada sore hari dan diangkat pada pagi hari. Analisis makanan menggunakan metode Indeks Bagian Terbesar. Jumlah ikan contoh yang diamati sebanyak 116 ekor yang terdiri atas 53 ekor ikan jantan dan 63 ekor ikan betina. Ukuran minimum ikan baji-baji yang tertangkap adalah 105 mm dan ukuran maksimumnya adalah 380 mm. Ikan baji-baji merupakan ikan karnivora dengan makanan utama krustase. Aktivitas makan ikan baji-baji tertinggi terjadi pada bulan Juni. Ikan baji-baji betina lebih banyak mengonsumsi krustase dibandingkan dengan ikan jantan serta mengalami perubahan makanan utama seiring dengan perubahan waktu dan pertambahan ukuran tubuh.
Keyword: ikan baji-baji, kebiasaan makan, krustase, Teluk Pabean

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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