Judul: Dinamika Populasi Sumberdaya Ikan Swanggi (Priacanthus tayenus, Richardson 1846) di Perairan Selat Sunda.
Abstrak: Priacanthus tayenus (Richardson 1846) is one of economic important demersal fish originally distributed in Sunda Strait. The fish has long been exploited; however, present stock status has not yet been assess. Therefore, in order to prevent overexploitation, its stock should be well studied. This study was aim at assessing reproduction biology and population dynamic of Purple-spotted bigeye (Priacanthus tayenus) in the Sunda Strait landed in Labuan Beach Fishing Port, Banten province. This study covered some aspects of reproduction, growth, and the rate of exploitation. Spawning time Purple-spotted bigeye was commenced in June to October. Size at first maturity in respect to female and male was 127,67 mm and 268,78 mm. Exploitation rates of female and male individuals were 71% and 64%, respectively. It is concluded that purple-spotted bigeye in Sunda Strait is overexploited.
Keyword: Growth, PPP Labuan, Purple-spotted bigeye, Rate of exploitation, Stock assessment

Judul: Faktor-Faktor Input Pengelolaan Sumberdaya Ikan Swanggi (Priacanthus tayenus, Richardson 1846) di Perairan Selat Sunda.
Abstrak: Hasil tangkapan perikanan di perairan Selat Sunda sangat beragam, salah satu sumberdaya ikan demersal yang bernilai ekonomis penting adalah ikan swanggi. Tujuan penelitian ini adalah menganalisis kondisi stok dan tingkat eksploitasi ikan swanggi (Priacanthus tayenus) dilihat dari faktor-faktor input pengelolaan. Analisis data terdiri atas rasio kelamin, hubungan panjang bobot, sebaran frekuensi panjang, parameter pertumbuhan, ukuran pertama kali matang gonad dan tertangkap, mortalitas, laju eksploitasi, serta penerimaan per unit upaya. Ikan swanggi memiliki pola pertumbuhan allometrik negatif. Laju eksploitasi ikan swanggi telah melebihi laju eksploitasi optimun dan telah mengalami eksploitasi berlebih sehingga upaya pengelolaan yang dapat dilakukan adalah pengaturan daerah tangkapan, kontrol terhadap intensitas penangkapan, sosialisasi terhadap nelayan serta penerapan alat tangkap yang ramah lingkungan.
Keyword: ikan swanggi, laju eksplotasi, pengelolaan, Selat Sunda

Judul: Detoxification of Cassava’s Acid Hydrolyzate by Activated Carbon Method for Bioethanol Production
Abstrak: Cassava is one of natural resources for carbohydrate that also available for bioethanol production. Starch and fibers hydrolysis maybe conducted on acid condition. The restriction in acid hydrolysis is 5-hydroxymethyl furfural (HMF) and furfural formation, which inhibit yeast fermentation. This study applied two stages of detoxification, which are overliming and activated carbon adsorption methods for lowering HMF and furfural concentrations. In order to obtain tolerable amount in sugar solution, detoxification by activated carbon adsorption was done by concentration of 1%, 2.5%, 5% and 10% and duration of contact are 30 45 and 60 minutes. The results showed that overliming method decreased HMF and furfural concentrations 34.38% and 60.81%, respectively. Overliming followed by 5% activated carbon adsorption for 30 minutes produced the best sugar solution which has a lower HMF and furfural concentrations by 72.03% and 89.11%, respectively. Adsorption constants of HMF and furfural by 5% activated carbon were 0.044 g/min and 3,7 x 10-5 g/min, respectively. The concentration of ethanol produced was 5.00% (b/v) or 63.22% higher than obtained from detoxification by neutralization (NH4OH) which produced ethanol only 3.06%.
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