Judul: Kondisi Mangrove dan Struktur Komunitas Udang (Studi Kasus di Kecamatan Pasekan, Indramayu)
Abstrak: Mangrove is one of a group of plants in the tidal area. This study aims to describe community structure of shrimp with relation to mangroves. Research analyzed were species of shrimps in three different sub-habitats are ponds, river, and beaches in the Pabean Ilir and Pagirikan villages, Indramayu. Conditions measurzed include vast, density, and basal cover of mangroves and water quality. The results showed that the extent and mangrove density in the Pagirikan village lower than Pabean Ilir village. Environmental conditions in the two observation stations showed the results do not significant different and still in the range for survival of shrimp. There are eight species of shrimp during the observation, namely Penaeus merguiensis, P. japonicus, P. monodon, Acetes sp., Metapenaeus ensis, M. monoceros, Harphiosquilla raphidae, and M. rosenbergii. Diversity shrimps in the Pabean Ilir slightly higher than Pagirikan, however not significant. Community structure differences found between sub-habitat of ponds, river, and beaches from each of the two observation sites.
Keyword: Shrimp., P. merguiensis, Mangrove, Diversity, Indramayu

Judul: Keterkaitan Ekosistem Mangrove dengan Keanekaragaman Ikan di Pabean Ilir dan Pagirikan, Pasekan Indramayu, Jawa Barat
Abstrak: Mangrove ecosystem has high productivity because it has the ability as a nutrient trap, which supports aquatic biota, especially fish. The purpose of this study was to determine the relationship between mangrove densities with total fish catch, number of fish species, and fish diversity. The data collections were mangrove condition, fish, physical, and chemical parameters. The results showed that mangrove density in Pabean Ilir Village higher than Pagirikan village. The highest importance value index of mangrove was Rhizophora mucronata and Avicennia marina. Total number of fish catch in two locations were 1093 individuals, consisting of 80 species belonging to 38 families. The dominant fish species were Ambassis nalua, Johnius belangerii, Leiognathus equulus, and Platycephalus indicus. There was positive relationship between the mangrove density with the total number of fish catch, number of fish species, and fish diversity in Pabean Ilir Village and Pagirikan Village, Pasekan Indramayu, West Java.
Keyword: mangroves., Indramayu, fish, Bogor Agricultural University (IPB)

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