Judul: Penilaian depresiasi sumberdaya ikan kembung dengan pendekatan penurunan produktivitas: studi kasus Kabupaten Pandeglang, Provinsi Banten
Abstrak: Mackerel (Rastrelliger spp.) is a small pelagic fish resource which has a high economic value and an important source of income and protein for communities of Pandeglang Regency. Due to increasing demand, the pressure of mackerel resource exploitation increase and raised the question of degradation and sustainability of the resource. Based on that condition the study aims to calculate degradation and depreciation rate of mackerel resource, bioeconomic analysis for resource management, and identification policy for sustainable resource management. Based on the calculation of Catch Per Unit Effort (CPUE) mackerel resources in Pandeglang indicated experiencing overfishing in biology (biological overfishing) because of fishing activity. Increased fishing effort unit will reduce CPUE mackerel resources of 0.00001 tons per trips per year. According to the calculation of the average degradation and depreciation of mackerel resource respectively 0.28 and 0.29. Since of depreciation and degradation is less than 0.5 indicates that the mackerel in Pandeglang has not been degraded and depreciated, but since the year of 2009 show the increasing degradation and depreciation. The best resource management option is carried out under conditions MEY (Maximum Economic Yield) which production rate 2,662 tons per year and the effort as many as 13,971 trips per year. Fishermen will obtain the maximum rents amounting to Rp 23.67 billion per year. Sustainable mackerel resource management policies to prevent and overcome the problems of overfishing, especially in Pandeglang can be done by implementing responsible approach based on ecosystem, socio-economic and cultural, socio-political, and legal institutional aspects.
Keyword: Mackerel, Overfishing, Degradation, Depreciation, Bioeconomic, Bogor Agricultural University, Institut Pertanian Bogor, IPB

Judul: Analisis Bioekonomi Perikanan Kembung (Rastrelliger spp) di Kota Padang Provinsi Sumatera Barat
Abstrak: Nilai subsektor perikanan terhadap PDRB Kota Padang mengalami peningkatan setiap tahunnya. Peningkatan nilai PDRB diiringi oleh peningkatan jumlah nelayan dan peningkatan produksi ikan kembung. Peningkatan produksi ikan dapat mempengaruhi kondisi biologi dan ekonomi perikanan. Kajian ini bertujuan untuk melihat karakteristik dari nelayan ikan kembung, menganalisis pemanfaatan sumberdaya ikan kembung, menganalisis tingkat degradasi sumberdaya ikan kembung serta merumuskan rekomendasi kebijakan dari hasil bioekonomi. Metode yang digunakan dalam penelitian ini yaitu pendekatan statistic descriptive, analisis bioekonomi model Schnute, analisis degradasi. Hasil penelitian menunjukkan karakteristik nelayan berupa tingkat pendidikan, umur, jumlah ABK, pengalaman, dan pendapatan. Penangkapan ikan kembung memberikan konstribusi sebesar 13,13% terhadap pendapatan nelayan melaut. Hasil analisis bioekonomi menunjukkan bahwa perikanan ikan kembung terdapat kecenderungan mengalami overfishing secara biologi dan belum terjadi overfishing secara ekonomi karena kondisi perikanan masih mampu mengahasilkan nilai rente yang positif. Laju degradasi ikan kembung di Kota Padang sebesar 0,27 dimana perikanan kembung belum mengalami degradasi. Berdasarkan hal tersebut diperlukan kebijakan untuk pengelolaan perikanan yang dapat mengatur batas penggunaan alat tangkap dalam rangka mengurangi jumlah effort yang berlebih.
Keyword: Bioeconomic, degradation rate, mackerel (Rastrelliger spp), Padang

Judul: Sintesis dan Pencirian Natrium Titanat (Na2Ti2O4(OH)2) Berbahan Dasar Titanium Dioksida
Abstrak: TiO2 can be utilized as basic material for synthesis of sodium titanate (Na2Ti2O4(OH)2). This research was purposed to synthesize and characterize sodium titanate from TiO2 rutile powder as a basic material. Sodium titanate was synthesized by hydrothermal process at temperature 130 °C by mixing TiO2 rutile powder with 5 M and 10 M NaOH solution, then each was calcinated at temperature 700 °C. The energy dispersive X-ray analysis showed that sodium titanate has been successfully synthesized. This result was also supported by functional group analysis with Fourier transform infrared (FTIR) spectrofotometer showing the existence of Ti-O-Na vibration band at 989.42 cm-1. The formation of sodium titanate was depend on the reaction condition such as temperature, reaction time, and NaOH concentration. Scanning electron microscope image indicated that sodium titanate synthesized at 130 °C in 20 hours reaction time with 10 M NaOH had crystal size of 99.37 nm.
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