Judul: Analisis Perbandingan Tingkat Pendapatan Usaha Pembudidaya Ikan Keramba Jaring Apung Sistem Monokultur dan Polikultur.
Abstrak: Bendungan Way Rarem terletak di Desa Pekurun, Kecamatan Abung Pekurun, Kabupaten Lampung Utara, Provinsi Lampung, menjadi salah satu lokasi budidaya ikan air tawar dengan sistem keramba jaring apung (KJA). Jenis sistem budidaya KJA yang dilakukan yaitu sistem polikultur dan monokultur dengan komoditas ikan mas dan nila. Sebagian besar penduduk desa menjadikan budidaya ikan sebagai mata pencaharian utama, maka pemilihan keputusannya dapat memengaruhi kesejahteraan pembudidaya. Tujuan penelitian ini yaitu: 1) Mengidentifikasi sistem polikultur yang diterapkan, 2) Menganalisis tingkat pendapatan sistem monokultur dan polikultur, 3) Mengidentifikasi faktor-faktor yang memengaruhi pembudidaya dalam pemilihan sistem budidaya. Metode yang digunakan dalam penelitian ini adalah analisis deskriptif, analisis uji t, analisis R/C rasio dan analisis Regresi Logistik dengan menggunakan SPSS25. Hasil penelitian ini menunjukkan bahwa terdapat perbedaan penggunaan jaring dan waktu panen pada ikan nila yang dilakukan 2 kali dalam satu tahun dengan ukuran 1-2 ekor per kilogram pada sistem polikultur. Ikan mas pada sistem monokultur dapat dipanen setelah 3 bulan pembesaran dengan ukuran 3-4 ekor perkilogram. Rata-rata pendapatan atas biaya total dari sistem polikultur dan monokultur adalah Rp 201.503.958/tahun dan Rp 137.688.958/tahun. Faktor – faktor yang memengaruhi keputusan dalam memilih sistem budidaya adalah tingkat pendidikan formal pembudidaya (TPFP), lama usaha budidaya (LUBI) dan pendapatan pembudidaya (PNPI).
Keyword: analisis pendapatan, monokultur, polikultur, regresi logistik

Judul: Analisis Perbandingan Tingkat Pendapatan dan Faktor yang Mempengaruhi Pilihan Sistem Budidaya Ikan dalam Keramba Jaring Apung (Studi Kasus Waduk Jatiluhur Kabupaten Purwakarta)
Abstrak: Jatiluhur reservoir is a multi-purpose dam located in Citarum River basin, Purwakarta. This reservoir has a major contribution for fishery sector in West Java. Main fishing activites in Jatiluhur Reservoir is fish cultivation by using Keramba net cage (Keramba Jaring Apung) techniques. Farmers mostly grow golden fish and tilapia fish. Both fishes are the major commodities in Jatiluhur Reservoir. Farmers apply two kinds of cultivation systems monoculture (only golden fish) and polyculture (golden fish and tilapia). The main goal of this research is to estimate the rate of farmers’ income, both for monoculture and polyculture farming, in Jatiluhur Reservoir. The result showed that income earned by polyculture farmers is more favorable than monoculture farmers. The difference among the two systems was statistically significantly meaning that statistically the level of income of the farmers who applied polyculture system was significantly different from those who applied monoculture systems. The second goal is to identify the factors that influence the farmers’ decision in the selection of the pattern between monoculture and polyculture systems in Jatiluhur Reservoir with logistic regression analysis. Based on the result obtained, the factors that influence farmers’ decisions at 15 percent significant level are the level of education, length of experience cultivation, farmers’ income and number of dependents, while the acreage of KJA has no effect on the farmers’ decision.
Keyword: determinants of the selection of fish farming pattern, polyculture of golden fish and tilapia, golden fish monoculture, comparison of income

Judul: Sintesis dan Pencirian Kompleks Fe(III)-Kuersetin
Abstrak: Quercetin belongs to flavonols which is able to chelate metal ions. Quercetin may chelate metal ions at 3’,4’-catechol, 3- or 5-hydroxycromone sites. In this study, quercetin was complexed with Fe(III). The complex with Fe(III) ions from FeCl3·6H2O was more stable than the complex derived from Fe(NO3)3·9H2O. The quercetin was yellow in color and showed maximum wavelengths (λ􀭫􀭟􀭶) at 250 and 370 nm. The Fe(III)-quercetin complex from Fe(NO3)3·9H2O was yellowish green with 􀟣􀭫􀭟􀭶 at 280 and 420 nm, whereas that from FeCl3·6H2O was dark green with 􀟣􀭫􀭟􀭶 at 280 and 430 nm. The 􀟣􀭫􀭟􀭶 shift indicated that the complex was formed at 3-hydroxychromone site. The Fe(III)- quercetin complex was formed with 1:1 metal-ligand mole ratio based on atomic absorption spectrophotometry analysis and the X-ray diffractogram showed that the crystallinity of the complex was 37%.
Keyword: