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: Penilaian Depresiasi Sumberdaya Ikan Lemuru Dan Dampaknya Bagi Kesejahteraan Nelayan Sebagai Bahan Pertimbangan Rekomendasi Kebijakan Perikanan (Studi Kasus: Kecamatan Muncar Kabupaten Banyuwangi)
Abstrak: Kecamatan Muncar merupakan penyumbang terbesar perikanan tangkap di Kabupaten Banyuwangi, dengan produksi perikanan tangkap dominan yaitu ikan lemuru. Tujuan penelitian ini adalah (1) menganalisis nilai depresiasi sumberdaya ikan lemuru, (2) menganalisis dampak depresiasi terhadap perubahan kesejahteraan nelayan, (3) mengidentifikasi alternatif rekomendasi kebijakan strategi adaptasi nelayan dan menganalisis alternatif kebijakan lain yang dilakukan pemerintah. Metode yang dipakai dalam penelitian ini adalah model bioekonomi Schaefar, metode present value, analisis perubahan surplus produsen, metode WSM dan analisis deskriptif. Berdasarkan data terkoreksi, depresiasi terjadi selama 9 kali dalam 15 tahun. Estimasi nilai depresiasi sebesar Rp 1,7 triliun dengan rata-rata Rp 214,3 miliar per tahun. Skenario pencemaran 10%, 25%, 50%, estimasi nilai depresiasi sebesar Rp 1,6 triliun, Rp 1,4 triliun, Rp 1,2 triliun. Total surplus yang hilang dari 190 armada di Kecamatan Muncar sebesar Rp 2,31 triliun/tahun. Alternatif kebijakan strategi adaptasi yang terbaik dilakukan yaitu penanaman pohon mangrove di Perairan Muncar. Rekomendasi kebijakan lain yang diajukan yaitu adanya pembatasan pemanfaatan perikanan tangkap dan mengurangi limbah pencemaran dengan aturan-aturan yang berlaku.
Keyword: bioekonomi, depresiasi, lemuru, perubahan surplus produsen, strategi adaptasi, weighted sum model

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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