Judul: Pengelolaan Sumber Daya Ikan Tetengkek (Megalaspis cordyla, Linnaeus 1758) di Pelabuhan Perikanan Nusantara Karangantu- Banten
Abstrak: This research is aimed to determine the optimum allocation of Torpedo scad resources in the PPN Karangantu, Banten. The optimum value that calculated such as level of production, the amount of effort and the value of the benefit of the fish resources. The results showed that have not experienced over exploitation yet. Surplus production models used in this research are the models of Schaefer, Fox, Walter Hilborn, Schnute and Clarke Yoshimoto Pooley. Schaefer models had R2 values that greater than other surplus production models. The value of R2 in this model is 77%. On the actual condition of the catched of 1111 kg/year with a fishing effort of 4,17 trips/year. In the regime of open access management has the highest value of effort but zero benefit. Based on the analysis of the bioeconomy got the sustainable catched (MSY) of 2092 kg/year and fishing effort (Fmsy) by 5,22 trips/year, and the catchs (MEY) of 2110 kg/year and fishing effort (Fmey) 5,21 trip/year. Bioeconomy analysis shows that the value of Factual is smaller than the value of Fmsy and also Fmey. This indicated that the resources of Torpedo scad has not been experiencing over exploitation both biologically and economically.
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Judul: Analisis Bioekonomi untuk Pengelolaan Sumber Daya Ikan Selar Kuning (Selaroides leptolepis, Cuvier dan Valenciennes) yang Didaratkan di PPN Karangantu
Abstrak: Yellowstripe scad (Selaroides leptolepis) is a small pelagic fish which has economically important. The purpose of this study is to find out the economic aspects condition of the Yellowstripe scad (Selaroides leptolepis, Cuvier and Valenciennes) population from the Bay of Banten. The models used in this study were Schaefer, Fox, Walter Hilborn, CYP, and Schnute surplus production models. Fox models had a highest coefficient of determination (R2) value than the others surplus production models. This coefficient of determination (R2) value model was 78%, with maximum sustainability yield (MSY) was 89.289 kg/year and its effort (Fmsy) was 2.462 trip/year. Bioeconomic analysis of MEY was 87.517 kg/year and Fmey was 2.001 trip/year. Bioeconomic analysis showed that Factual value greater than Fmsy and Fmey. It indicate that Yellowstripe scad has been in overfishing condition economically. The better management regime is a regime management of MEY because it gets a catch effort and TC that was smaller and larger profit than management of MSY and oppen access. As plan for fish stock management for Yellowstripe scad in PPN Karangantu are controlling the catches effort and gears selectivity.
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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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