Judul: Analisis Bioekonomi Sumber Daya Ikan Swanggi (Priacanthus macracanthus Cuvier, 1829) di Teluk Palabuhanratu, Sukabumi, Jawa Barat
Abstrak: Ikan swanggi merupakan hasil tangkapan yang menjadi incaran nelayan di wilayah Palabuhanratu karena menjadi komoditas ekspor sehingga dapat mengakibatkan terjadinya overfishing. Tujuan penelitian ini untuk menentukan kondisi populasi sumber daya ikan swanggi (Priacanthus macracanthus) di Teluk Palabuhanratu berdasarkan aspek bioekonomi. Pengambilan contoh ikan dilakukan dengan metode Penarikan Contoh Acak Sederhana dari September 2021 sampai Februari 2022. Data yang digunakan berupa data sekunder dan primer. Model produksi surplus yang digunakan untuk parameter biologi pada analisis bioekonomi adalah Fox yang lebih mampu menjelaskan data yang ada dengan korelasi 61%. Hasilnya diperoleh tangkapan lestari maksimum (MSY) sebesar 16.998 kg/trip dan upaya penangkapan (fMSY) sebesar 859 trip/tahun yang menjamin keberlanjutan sumber daya ikan swanggi. Hasil dari ketiga rezim pengelolaan fOA lebih besar dari fMEY dan fMSY, sehingga kondisi populasi sumber daya ikan swanggi (Priacanthus macracanthus) di Teluk Palabuhanratu berdasarkan pendekatan bioekonomi telah mengalami overfishing., Red bigeye is a catch that is the target of fishermen in the Palabuhanratu area because it is an export commodity so it can cause overfishing. The purpose of this study was to determine the condition of the red bigeye (Priacanthus macracanthus) population in Palabuhanratu Bay based on bioeconomic aspects. Fish sampling was carried out using the Simple Random Sampling method from September 2021 to February 2022. The data used is in the form of secondary and primary data. The surplus production model used for biological parameters in the bioeconomic analysis is Fox because it has a larger R, namely 61%. Based on the Fox model, the maximum sustainable catch (MSY) is 16,998 kg/trip and the fishing effort (fMSY) is 859 trips/year which ensures the sustainability of red bigeye resources. The results of the three management regimes fOA are greater than fMEY and fMSY, so the condition of the population of red bigeye (Priacanthus macracanthus) resources in Palabuhanratu Bay based on the bioeconomic approach has experienced overfishing.
Keyword: Bioeconomic, Palabuhanratu Bay, red bigeye, sustainability

Judul: Reproductive Biology of Red Bigeye (Priacanthus macracanthus Cuvier, 1829) in Palabuhanratu Bay, Sukabumi, West Java
Abstrak: Ikan swanggi (Priacanthus macracanthus) merupakan salah satu ikan demersal yang memiliki nilai ekonomis dan ekologis penting. Tingginya intensitas penangkapan ikan swanggi akan berdampak pada perkembangan stok ikan yang akan terhambat serta mengancam potensi sumberdaya ikan swanggi. Penelitian ini bertujuan menganalisis aspek biologi reproduksi ikan swanggi di Teluk Palabuhanratu. Penelitian ini dilakukan pada bulan September 2021 hingga Februari 2022. Metode yang digunakan dalam pengambilan contoh adalah penarikan contoh acak sederhana. Ukuran contoh ikan swanggi yang diteliti sebanyak 566 ekor. Nisbah kelamin sebesar 1:1,18 yang didominasi ikan betina. Pola pertumbuhan ikan swanggi yaitu allometrik negatif. Potensi reproduksi ikan swanggi berkisar antara 16.921-28.683 butir telur. Pola pemijahan ikan swanggi adalah total spawner atau pemijahan terjadi secara sekaligus. Puncak musim pemijahan selama pengamatan terjadi pada bulan Februari., Red bigeye (Priacanthus macracanthus) is one of the demersal fish that has important economic value. The high intensity of red bigeye fishing will have an impact on the development of fish stocks which will be hampered and threaten the potential of red bigeye resources. This research aims to analyze the reproductive biology of red bigeye in Palabuhanratu Bay. This research was conducted from September 2021 to February 2022. The method used in sampling was simple random sampling. This research using 566 individuals. The sex ratio of male and female is 1:1,18 which is dominated by female fish. The growth pattern of red bigeye is negative allometric. The reproductive potential of red bigeye ranged from 16,921-28,683 of eggs. Spawning pattern of red bigeye is a total spawner or spawning time occurs at once. The peak spawning season during observation was occured in February.
Keyword: Palabuhanratu, Red Bigeye, Reproductive Biology

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