Judul: Bioekonomic Analysis on the Impact of Fish Aggregation Device for the Sustainable of Tuna Kecil Fisheries (Case Study at the Palabuhanratu Bay Area, Sukabumi Regency).
Abstrak: The research aims to determine the impact of using fish aggregation device in the Palabuharatu bay. The study uses a bioeconomic approach and simulation. Using Ordinary Differential Equation (ODE) teqchnique, the dynamic trajectory of resources as well as the phase plane between input and output calculated with the computer programs, Maple 9.5 and Excell. The result of the study showed that little tuna and skipjack tuna fisheries in the Palabuhanratu bay area has been experiencing both severe biological and economic over fishings. Calculation of degradation rate coefficient of the fishery that the resource at average 0,2596 per year. The existence of fish aggregation device increases yield around 11,79 % and decrease the effort level 10 10,54 %. Dynamic analysis shows the relation between stock and effort on the exploitation of little tuna and skipjack tuna fisheries in Pelabuhanratu bay, showed in third quadrant e.\ploi/otion (increasing effort causing decreasing stock), stock trajecto/y and effort have Ihe same pattern on the condition of before and afier implemented of fish aggregation device. Increasing slack will be reached if there is decreasing on effort
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Judul: Dampak Ekologis dan Ekonomis Kegiatan Perikanan Tangkap di Palabuhanratu, Sukabumi, Jawa Barat.
Abstrak: To study the sustainable fishing management, an integrated analysis of ecology economy should be sistematicaly conducted. The objective of this study are: (1) to determine the ecological and economic impact of fishing activities on community structure and trophic level of catch; 2) to determine optimum utilization fish stock based on bio-economic aspects. The results showed that the catches landed in PPN Palabuhanratu were dominated by highest food web level (trophic level) of carnivore group fish (TL5). The annual catch of this TL group was increase, the potentially threaten its prey of TL 2 to TL 4. The most dominant catch in study location was hairtail (Trichiurus savala). Hairtail was dominanly caught by hand line and payang (seine nets). The catch of this spesies was larger than the size of the allowable size based on length at first maturity parameter. Length-weight relationships of this species seemed negative allometric growth pattern (b = 2,6734). The sustainable utilization of the hairtail fish stock in the fishing ground of Palabuhanratu is 222.248 kg with annual effort of 14.571 trips for handline fishing fleet and 6.267 trips for payang fishing fleet. Bio-economic optimization of payang fishing fleet was higher than hand line fishing fleet.
Keyword: Bogor Agricultural University (IPB), trophic level, Palabuhanratu, hairtail, bioeconomic

Judul: Prenilasi Senyawa β-Diketon sebagai Prekursor 3-Prenilflavon
Abstrak: One group of flavonoids that has not been commonly synthesized is 3- prenylflavone. The main objective of this experiment was to synthesize precursor of 3-prenylflavone. Firstly, β-diketone was synthesized via 4 steps from phenol as starting compound with total yield of 24%. Prenylation of β-diketone with prenyl bromide and K2CO3 base produced 4 fractions which were separated by using preparative thin layer chromatography (PTLC) with n-hexane:EtOAc (8:2) as the eluent. Fraction with Rf = 0.80 was further separated by using preparative PTLC with n-hexane:EtOAc (99:1) as the eluent. Two fractions were obtained with Rf = 0.38 and 0.42. The first fraction has been characterized as diprenylated β-diketone with 49% yield. Application of protecting group on the phenolic OH group in β- diketone are needed to obtain monoprenylated β-diketone which can be further cyclized into 3-prenylflavone
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