Judul: Perbandingan Ketidakpastian Perikanan Kembung (Rastrelliger spp.) Di Perairan Selat Sunda dan Laut Jawa
Abstrak: Ikan kembung memiliki kandungan gizi tinggi yang menyebabkan nilai ekonomi tinggi di Indonesia. Sumber daya ikan bersifat tidak tampak dan mengikuti dimensi ruang, penyebab ketidakpastian dan resiko dalam perikanan, sehingga membutuhkan pengelolaan yang tepat. Fluktuasi produksi dan harga menyebabkan ketidakpastian dalam perikanan. Penelitian ini bertujuan mengestimasi tingkat ketidakpastian produksi dan harga ikan kembung secara temporal yang ditangkap di perairan Selat Sunda dan Laut Jawa, dan mengidentifikasi upaya pengelolaan berdasarkan analisis ketidakpastian. Data primer berupa produksi, harga, dan biologi ikan dikumpulkan pada Maret-April 2021 di Laut Jawa. Data sekunder diperoleh dari DKP Banten tahun 2009-2018, KUD Mina Fajar Sidik tahun 2018- 2020, dan hasil riset sebelumnya di Selat Sunda. R kanagurta bersifat alometrik positif, R brachysoma bersifat isometrik, dan R faughni bersifat alometrik negatif. R. kanagurta dan R. brachysoma dari Laut Jawa periode Maret-April 2021 bersifat isometrik. Analisis Monte Carlo menyimpulkan bahwa ketidakpastian produksi dan harga ikan kembung di Selat Sunda lebih rendah dibandingkan di Laut Jawa. Skil nelayan dan teknologi perlu diperbaiki untuk mengurangi ketidakpastian., Mackerel (Rastrelliger spp.) has high nutrition, causing high economic value in Indonesia. The invisible and spacial dynamic of fish resources causes uncertainty and fisheries risk. Production and price fluctuation are implicated in fisheries uncertainty. The research objectives are to estimate the uncertainty of temporary production and price of mackerel captured at Sunda Strait and the Java Sea, and identify the suitable fisheries management based on fish uncertainty. The primer data such as daily production and price, and fish biology were collected from March to April 2021 captured at Java Sea. Secondary data was collected from DKP Banten on the period 2009-2018, KUD Mina Fajar Sidik period 2018-2020, and previous research activities at Sunda Strait. R. kanagurta had positive allometric, R. brachysoma has isometric and R. faughni has a negative allometric growth pattern. In contrast, both R. kanagurta and R. brachysoma from the Java Sea have isometric growth pattern. Monte Carlo analysis conclude that both locations have production and price uncertainty. The production and price uncertainty at Sunda Strait were lower than at Java Sea. Need the improving of technology and fishermen skill to anticipate the fisheries risk.
Keyword: allometric, fluctuation, fisheries uncertainty, isometric

Judul: Stock Status of Mackerel (Rastrelliger faughni Matsui, 1967) in the Sunda Strait
Abstrak: Ikan kembung (Rastrelliger faughni Matsui, 1967) merupakan salah satu jenis ikan pelagis yang memiliki nilai ekonomis penting, sehingga termasuk salah satu target penangkapan nelayan di Perairan Selat Sunda, Banten. Tujuan dari penelitian ini adalah menentukan status stok sumberdaya ikan kembung di Perairan Selat Sunda berdasarkan ikan yang didaratkan di Pelabuhan Perikanan Pantai (PPP) Labuan Banten. Penelitian ini dilakukan pada periode Juni hingga Oktober 2014. Analisis yang dilakukan meliputi analisis nisbah kelamin, hubungan panjang dan bobot, tingkat kematangan gonad, fekunditas, sebaran kelompok umur, mortalitas, laju eksploitasi, dan model produksi surplus. Hasil yang diperoleh menunjukkan bahwa pola pertumbuhan ikan kembung betina maupun jantan adalah allometrik positif. Laju eksploitasi ikan kembung betina dan jantan telah mengalami tangkap lebih. Hasil tangkapan maksimum lestari dan upaya optimum sebesar 422 ton per tahun dan 758 trip per tahun.
Keyword: Mackerel (Rastrelliger faughni), exploitation rate, the pattern of growth, sunda strait, maximum sustainable yield, Fish stock, Pelagic fish, Sex ratio, Length and weight, Maturity level, Age group distribution, Mortality

Judul: Elektrodeposisi Film Tipis Semikonduktor Cu2ZnSnS4 (CZTS) pada Substrat Kaca ITO
Abstrak: Semiconductor Cu2ZnSnS4 (CZTS) thin film that can be used as absorber layers on solar cell module was made via electrodeposition method. CZTS thin film was electrodeposited on the surface of a silicate glass coated with a thin layer of indium tin oxide (ITO). Deposition process was done using potentiostatic mode at room temperature with a potential of 1.05 V for 30, 45, and 60 minutes, followed with annealing the film at 2 different temperatures, 500 ºC using furnace and 180 ºC using hot plate, both treatments for 45 minutes in N2/H2S atmosphere. The X-ray difractograms were analyzed using Match 2 program and showed that the CZTS thin films had kesterit crystalline structure, with a low percentage of CZTS phase. The thin film also contained secondary phases such as Cu2S, ZnS, and SnS. The obtained CZTS thin films had a thickness between 1.039 and 1.676 μm. Absorption study showed that the band gap energy of CZTS thin films which was annealed using furnace ranged from 1.50 to 1.52 eV, whereas that annealed using the hot plate was not observed. The band gap energy value showed that CZTS thin films can be used as sunlight absorber layers on solar cell. The formation of CZTS crystal film on this investigation was effectively performed using furnace annealing process at a temperature of 500 ºC with deposition time of 45 minutes.
Keyword: Thin film, Electrodeposition, Cu2ZnSnS4