Judul: Biodiversitas, Karakter Morfologis dan Aspek Reproduksi Jenis Ikan Khas Perairan Mangrove di Suaka Margasatwa Muara Angke, Penjaringan Jakarta Utara
Abstrak: The research was conducted in Muara Angke Wildlife Conservation, Penjaringan, North Jakarta. The aim of this study was to determine fish diversity in mangrove ecosystem, morphological character, and reproduction aspect (P. schlosseri, A. Gymnocephalus, and L. subviridis). Furthermore, those were compared with the same fish species in Ujung Kulon National Park. The result showed that there were 32 spesies belongs to 29 genera and 24 families were found in Muara Angke Wildlife Conservation. Based on PCA analysis, P. schlosseri has variance that can be explained 45.5%, L. subviridis 59.8%, and A. gymnocephalus 64.5%. The highest fluctuating asymmetry character is located in gill rakers. P. schlosseri supposedly better able to adapt to the pattern in the SMMA positive allometric growth (b> 3). Fecundity of this three species is vary and depend on environmental factors.
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Judul: Hubungan antara Kondisi Mangrove dengan Keanekaragaman Jenis Ikan di Muara Angke, Jakarta Utara
Abstrak: Kegiatan pembangunan yang berdekatan dengan ekosistem mangrove menjadi faktor utama penyebab penurunan kondisi ekosistem mangrove di Jakarta, yang diduga berdampak terhadap ikan yang berasosiasi di dalamnya. Penelitian ini bertujuan menganalisis hubungan antara kondisi ekosistem mangrove dengan keanekaragaman ikan. Pengamatan lapang dilakukan pada bulan Desember 2021 hingga Januari 2022 di kawasan mangrove Muara Angke, Jakarta Utara. Pengukuran vegetasi mangrove dilakukan pada empat stasiun melalui metode transek dengan tiga ulangan, sedangkan pengambilan contoh ikan menggunakan alat tangkap jaring insang yang dilakukan pada waktu pasang dan surut selama tiga hari berturut. Hasil yang diperoleh menunjukkan kerapatan mangrove paling tinggi berada di stasiun empat. Kondisi kesehatan mangrove juga tergolong kategori sedang. Jenis mangrove dengan indeks nilai penting tertinggi adalah Rhizophora apiculata. Total hasil tangkapan ikan dari dua stasiun di lokasi sebanyak 187 individu dengan tingkat keanekaragaman ikan berada pada kategori sedang. Terdapat hubungan positif antara kerapatan mangrove dengan keanekaragaman jenis ikan di Muara Angke, Jakarta Utara., Development activities adjacent to the mangrove ecosystem were the main factors causing the decline in the condition of the mangrove ecosystem in Jakarta, which ultimately affects the associated fishes. This study aims to analyze the relationship between the condition of the mangrove ecosystem and fish diversity. Field observations were carried out from December 2021 to January 2022 in the mangrove area of Muara Angke, North Jakarta. Measurement of mangrove vegetation was carried out at four stations through the transect method with three replications, while fish sampling was carried out using gill nets which were carried out at high and low tides for three consecutive days. The results obtained showed that the highest density of mangroves was at station four. The health condition of the mangroves is also in the moderate category. The type of mangrove with the highest importance value index is Rhizophora apiculata. The total fish catches from the two stations in the location were 187 individuals with the index of fish diversity in the medium category. There is a positive relationship between mangrove density and fish species diversity in Muara Angke, North Jakarta.
Keyword: fish, mangrove, Muara Angke

Judul: Pembuatan Film Tipis Cu2ZnSnS4 sebagai Lapisan Penyerap Cahaya pada Sel Surya Menggunakan Metode Elektrodeposisi
Abstrak: Thin film of Cu2ZnSnS4 (CZTS) is an alternative semiconductor used as light absorber layer on solar cell. CZTS can replace silicon that commonly used as commercial semiconductor. The advantage of using CZTS as absorber layer is due to the abundance of its chemical composer on earth, and its high value of absorption coefficient. The absorber layer was made by using electrodeposition method on ITO glass substrates. The films were deposited at room temperature using potentiostatic mode with a potential of –1.05 V for 30, 45, and 60 minutes. After that, the films were annealed at two different temperatures, 180 ºC and 500 °C, for 45 minutes in N2/H2S atmosphere. Based on X-ray diffraction analysis, the polycrystalline thin film obtained fall into kesterite crystal phase. This type of crystal was obtained when the CZTS was annealed at 500 °C in H2S/N2 atmosphere. The value of optical band gap energy for the CZTS thin film was 2.2 eV with the film thickness about 1.228–6.366 μm. The sample of CZTS with electrodeposition time of 45 minutes and annealing temperature of 500 °C showed the best result and in conformity with absorber layers criteria for solar cells.
Keyword: semiconductor, ITO glass, CZTS thin film, electrodeposition