Judul: Model permintaan filet ikan nila beku Indonesia di Pasar Amerika Serikat
Abstrak: Ikan nila Indonesia telah menembus pasar internasional dan ekspornya yang berupa filet beku terus mengalami peningkatan yang signifikan. Pasar utama ekspor filet ikan nila beku yaitu Amerika Serikat. Amerika Serikat lnerupakan Negara importir terbesar untuk pasar ikan nila di dunia. Indonesia menempati urutan kedua setelah Cina sebagai pemasok utama filet ikan nila beku di Pasar Amerika Serikat. Penelitian ini menggunkan metode analisis data sekunder. Data tersebut merupakan rangkaian waktu (tinle series) periode 1992-2004 untuk Pasar Amerika Serikat. Variabel bebas yang digunakan adalah harga rata-rata impor filet ikan nila beku Indonesia di Pasar Amerika Serikat, volume impor filet ikan nila beku Cina di Pasar Amerika Serikat, dan pendapatan per kapita Amerika Serikat.
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Judul: Faktor-Faktor yang Memengaruhi Permintaan Impor Ikan Hias Indonesia di Negara Importir Utama
Abstrak: Indonesia merupakan salah satu negara pengekspor ikan hias dunia. Permintaan ikan hias Indonesia berasal dari negara importir utama seperti Amerika Serikat, Tiongkok, dan Singapura. Dalam hal memenuhi permintaan pasar ikan hias di negara importir, Indonesia masih kalah dengan negara lainnya seperti Filipina. Tujuan penelitian ini yaitu menganalisis faktor-faktor yang memengaruhi volume permintaan impor ikan hias Indonesia di negara Amerika Serikat, Tiongkok, dan Singapura. Periode waktu yang digunakan dari tahun 2000 sampai 2018. Sumber data berasal dari UN Comtrade dan World Bank. Metode penelitian yang digunakan adalah analisis deskriptif dan analisis kuantitatif menggunakan Ordinary Least Square. Hasil dari penelitian ini menunjukkan volume permintaan impor ikan hias Indonesia di Amerika Serikat dan Singapura memiliki tren yang negatif sedangkan di pasar Tiongkok memiliki tren yang positif. Kemudian faktor – faktor yang memengaruhi permintaan impor ikan hias Indonesia di Amerika Serikat yaitu harga impor ikan hias Indonesia, harga impor pesaing, dan kurs rupiah terhadap dolar Amerika. Pada pasar Tiongkok dipengaruhi oleh harga impor ikan hias Indonesia dan kurs rupiah terhadap yuan. Sedangkan pada pasar Singapura dipengaruhi oleh harga impor ikan hias Indonesia.
Keyword: ordinary least square, perdagangan, perikanan

Judul: Screening and Characterization of Bacterial Antagonists as Potential Agents for the Biological Control of the Chrysanthemum White Rust Disease
Abstrak: White rust disease caused by Puccinia horiana (Basidiomycetes: Uredinales) is the major problem on chrysanthemum plantation and caused yield lost until 100%. Biocontrol is an alternative way to control this disease. Therefore, the aims of this study are to obtain antagonist bacterial as biocontrol agents of chrysanthemum white rust disease, to identify the potential isolate and their biocontrol character, charachterized their biocontrol mechanism, and to know the role of their chitinolytic activity on germination of teliospore. The methods used in this study are selection of antagonistic bacteria which are able to control this disease in-vitro, characterized of potential antagonist bacteria with polymerase chain reaction of a 16S rRNA gene and physiology and biochemical character, characterized the mechanism of inhibition teliospore germination, and the role of chitinolytic activity in antagonism activity using transposon mutagenesis. The result showed that out of 29 bacterial isolates, 12 isolates had chitinolityc activity. The twelve isolates were the potential antagonist agents to control teliospore germination with percentage above 90%. Isolate K2 was the most potential antagonist bacteria to control this disease. This isolate could inhibit the germination up to 98% and had the highest chitinolytic activity among the isolates. Based on 16S rRNA gene partial sequences analysis and physiology and biochemical characters, this isolate was identified as Chromobacterium sp. The major mechanism was antibiosis. It is showed from the biocontrol activity which are bacteria’s cell colonization, lytic activity, and disintegrated of protoplasm. This bacteria produced cyanide acid (HCN) and phenazine beside chitinolytic enzyme. Chitinolytic activity was not a single factor in the mechanism of antibiosis but other secondary metabolic compounds produced by this bacteria also come into play. It is showed on the results of mutagenesis that transconjugants which had no chitinolytic activity was still able to inhibit germination of teliospora, whereas transconjugants which still had an activity equal to or smaller than wild type bacteria, the inhibitory were lower. It was indicated that chitinase was not the most important compound that inhibited the germination of teliopsore. There was another compound have the bigger role such as hydrogen cyanide, phenazine, or other substances produced by Chromobacterium sp..
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