Judul: Potensi dan Laju Eksploitasi Sumber Daya Ikan Kurisi (Nemipterus japonicus Bloch, 1791) di Selat Sunda yang Didaratkan di PPP Labuan, Banten
Abstrak: Labuan Fishing Port is growing fish landing place around the Sunda Strait. Threadfin Bream include demersal fish with most catch is 14%. The purpose of this study was to assess the condition of the Threadfin Bream in Sunda Strait. In this study, used the surplus production models and ELEFAN I methods. The results showed that exploitation rate of Threadfin Bream males and females respectively are 0.87/year and 0.77/year. Bioeconomic analysis results showed that the optimum production level on utilization for Threadfin Bream resourches was 1 836.05 tons/year; the optimum effort levels on utilizations for Threadfin Bream resourches was 750 trips/year; and the optimum economic rent levels on utilizations for Threadfin Bream resourches was Rp 36 608 932 573/year. Now, Threadfin Bream resourches was indicated has biological overfishing and economic overfishing. One of the effort to overcome it is to reduce the excessive input by limiting fishing effort and fish diversion targets.
Keyword: Sunda Strait, PPP Labuan, Exploitation rate, Threadfin Bream (Nemipterus japonicus), Bioeconomic

Judul: Stock study of Japanese Threadfin Bream (Nemipterus japonicus, Bloch 1791) in Sunda Strait, Banten
Abstrak: Ikan kurisi merupakan ikan demersal yang termasuk ikan ekonomis penting dan sering tertangkap di perairan Selat Sunda. Tujuan penelitian ini adalah mengidentifikasi status stok sumberdaya ikan kurisi di Selat Sunda yang didaratkan di PPP Labuan, Banten sebagai dasar informasi pengelolaan. Penelitian ini dilakukan pada bulan September 2019 sampai Februari 2020. Total ikan contoh pada penelitian ini terdiri dari 199 ekor ikan jantan dan 218 ekor ikan betina. Nisbah kelamin pada penelitian ini menunjukkan ikan kurisi berada dalam keadaan seimbang. Pola pertumbuhan ikan kurisi allometrik negatif. Ukuran pertama kali matang gonad (Lm) ikan kurisi lebih panjang dibanding ukuran pertama kali tertangkap (Lc). Puncak peremajaan ikan kurisi jantan dan betina terjadi pada bulan Mei dan Agustus. Mortalitas dan laju eksploitasi menunjukkan ikan kurisi sudah dieksploitasi secara berlebih. Hasil analisis tangkapan lestari maksimum menunjukkan nilai upaya aktual telah melebihi nilai upaya lestari, Japanese threadfin bream is a demersal fish which is an important economic fish and is often caught in the waters of the Sunda Strait. The purpose of this research is to identify the stock status of japanese threadfin bream resources in the Sunda Strait which landed at PPP Labuan, Banten as the basic for information management. The research was conducted from September 2019 until February 2020. The total fish samples in this research were 199 males and 218 females. The sex ratio in this research shows that Japanese threadfin bream in Sunda Strait are in a state of balance. The growth pattern of Japanese threadfin bream is allometric negative. The length at first maturity (Lm) of Japanese threadfin bream longer than the length at first captured (Lc). The peak recruitment of male and female Japanese threadfin bream occurred in May and August. The mortality and exploitation rate showed that the Japanese threadfin bream are overexploited. The result of maximum sustainable yield shows that the actual effort value has exceeded the sustainable effort value
Keyword: Japanese threadfin bream, maximum sustainable yield, Sunda Strait, stock status

Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
Keyword: