Judul: Kajian Stok Sumber Daya Ikan Selar Kuning Caranx (Selaroides) leptolepis Cuvier dan Valenciennes yang Didaratkan di PPN Karangantu, Banten
Abstrak: Yellowstripe scad (Selaroides leptolepis) is an important economic value fish as one of target species by fishermen in PPN Karangantu. The purpose of this research is to assess the condition of yellowstipe scad stocks in the Gulf of Banten. The research was conducted in May to August 2012. Total number of fish taken during the research were 728 individuals. The results showed that the yellowstripe scad have isometric growth pattern. Size at first maturity of yellowstripe scad was 146 mm with peak spawning occurs in August. Yellowstripe scad exploitation rate has exceeded the optimum exploitation rate that yellowstripe scad in the Gulf of Banten allegedly already overfished. Management measure that can be suggested is through setting dogol mesh sizes and fishing season closure to achieve sustainable use of this resources
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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: Comparison of HIV Model with and without Time Delay
Abstrak: Acquired immunodeficiency syndrome (AIDS) is the reduction of the human immune system. AIDS is caused by human immunodeficiency virus (HIV). No medicine has been found for this desease until recently. An AIDS therapy is usually performed with highly active antiretroviral therapy, namely reverse transcriptase inhibitors, protease inhibitors and combination of both. Various models have been developed to explain the immune system of patients with AIDS, namely the HIV, response and the time delay model. This paper discusses the comparison between the dynamics of the HIV virus, the dynamic response of protease inhibitors and dynamics of time delay. The dynamics model of HIV is influenced by the level of white blood cells produced and the rate of its death. Dynamics of protease inhibitors on the response and the time delay model is influenced by the death rate of infected white blood cells and the failure rate of treatment.
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