Judul: Ecological Characteristics of Catch by Handline Fisherman Landing based in Harapan Island Kepulauan Seribu
Abstrak: Pancing kotrek merupakan alat tangkap yang digunakan oleh nelayan Pulau Harapan untuk menangkap ikan ekor kuning (Caesio cuning). Kegiatan penangkapan berpotensi menimbulkan dampak negatif terhadap ikan target dan fungsi ekosistem. Penelitian ini bertujuan untuk: mendeskripsikan unit penangkapan pancing kotrek yang berbasis di Pulau Harapan, Kepulauan Seribu; mengestimasi jenis dan keragaman ikan hasil tangkapan pancing kotrek yang berbasis di lokasi studi; dan mengevaluasi dampak penangkapan berdasarkan persentase jumlah ikan layak tangkap menurut spesiesnya dan tingkat trofik hasil tangkapan pancing kotrek yang berbasis di lokasi studi. Hasil penelitian menunjukkan bahwa konstruksi pancing kotrek di Pulau Harapan terdiri dari penggulung, tali utama (main line), tali cabang (branch line), benang, kili-kili (swivel), mata pancing (hook), dan pemberat. Mata pancing yang digunakan yaitu nomor 20. Ikan hasil tangkapan pancing kotrek terdiri dari 13 jenis dengan nilai indeks keragaman Shannon- wiener H’=1,57. Ukuran layak tangkap berdasarkan parameter length at first maturity (Lm) menunjukkan bahwa ikan ekor kuning (Caesio cuning) sebesar 41% layak tangkap, ikan selar como (Atule mate) sebesar 64-91%, dan ikan lemuru (Sardinella lemuru) sebesar 25-92%. Berdasarkan parameter tingkat trofik hasil tangkapan, pancing kotrek didominasi oleh jenis ikan kelompok omnivora cenderung pemakan hewan atau trophic level 3 (TL3). Penelitian ini menunjukkan bahwa walaupun ikan hasil tangkapan pancing kotrek sebagian besar layak tangkap, namun secara ekologis berdampak terhadap struktur dan fungsi ekosistem (ketidakseimbangan rantai makanan)., Handline is a fishing gear maintly used by the fishermen in Harapan Island to catch Redbelly yellowtail fusilier (Caesio cuning). Fishing has a potential negative impact on target fish and ecosystem function. This study aims: to describe the handline fishery based in Harapan Island, Kepulauan Seribu; to estimate species and diversity of catch by handline in this study area; and to evaluate fishing impact base on parameters of biological allowable catch sizes and trophic level of handline in this study area. The study result showed that the handline construction in Harapan Island consisted of a roller, main line, branch line, twine, swivel, hook, and weight. There were 13 fish species caught by handline with Shannon – wiener diversity index value H ' of = 1,57. Biological allowable catch size based on the parameter length at first maturity (Lm) showed that Redbelly yellowtail fusilier (Caesio cuning) has allowable catch size of 41%, Yellowtail scad (Atule mate) of 64-91%, and Bali sardinella (Sardinella lemuru) of 25-92%. Based on the trophic level parameters, the handline catches were dominated by the omnivore group of fish or trophic level 3 (TL3). This study confirm that although most of the handline catches are allowable size, ecologically it has an impact on the structure and function of the ecosystem (food chain imbalance).
Keyword: ecological impact, catch characteristic, Kepulauan Seribu, handline

Judul: Pengaruh Penangkapan Ikan terhadap Komposisi Tingkat Trofik (Trophic Level) di Kepulauan Seribu
Abstrak: Trophic level is a structure of organism in food chain. The using both selective or non selective fishing gears has potential effects on the food chain. Thus, the important question is whether the caught at a certain trophic level relate to the used fishing gears. The study aimed: (1) to describe the status of fisheries in Seribu Islands; (2) to determine the composition of caught based on fishing gear types; and (3) to identify the potential impacts on ecosystem. The result of this study showed that the major fishing gears in Seribu Islands were seine net, muroami, gill net, hook and line as well as „bubu tambun‟ (trap). Most of the catch in the study area were redbelly yellowtail fusilier and goldlined spinefoot; the average length were 19 ± 4,0 cm and 22,4 ± 1,5 cm respectively. Further more, the average weight were redbelly yellowtail fusilier (110,6 ± 103,7 gr) and goldlined spinefoot (163,6 ± 58,5 gr). Majority, trophic level of catch was carnivores which prey the smaller fish and cephalopods (TL5: 4.0 – 4.5) e.g. frigate mackerel. This study has indicated that there was an impact of fishing on the ecosystem, particularly the balance of the food chain.
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Judul: Synthesis of Molybdenum Trioxide (MoO3) by Electrochemical Method for Electrochromics Application
Abstrak: Molybdenum trioxide (MoO3) thin films have been deposited on glass substrates by electrochemical method using ammonium heptamolybdate tetrahydrate ((NH4)6Mo7O244H2O). The films were deposited onto glass substrates as the control temperature at 25○C and annealing treatment at 350○C for 30 mins. The MoO3 thin films were investigated by UV-Vis, X-ray diffraction techniques (XRD), Scanning Electron Microscopy (SEM). The JCPDS card show that orthorhombic MoO3 (α- phase) has been formed. Molybdenum trioxide MoO3 formation was also confirmed by JCPDS card no. 35-0609. The SEM photographs revealed that the spherical and rod-like morphology and their grains size increased with increasing of heating temperatures. The measurement results show that the MoO3 thin film prepared at 350°C transmited about 80% of the visible spectrum. The effect of different heat treatments on surface morphology, thickness and optical properties of the films are discussed in this thesis.
Keyword: Institut Pertanian Bogor, Bogor Agricultural University, IPB, Electrophoretics, electrodeposide, electrochromics, electrochromic materials, electrochromic mechanism