Judul: Dinamika Perubahan Penggunaan Lahan dan Kecukupan Usahatani di Kabupaten Subang
Abstrak: Subang regency is located adjacent to Jakarta on the north coast of West Java. This strategic location has positioned Subang for having an added value of easy access. Therefore, it is exposed to increasing regional growth and development. Approximately 11,250 ha of the area have been allocated in a spatial plan as industrial area. The allocation causes land alteration, primarily in agricultural fields. Considering its significant impact, land conversion needs to be controlled. This research aims to observe the patterns of agricultural land use change in Subang during 2007-2013, as well as to study factors affecting land conversion by using logistic regression and to identify farmer’s interest to maintain their agricultural land. Analysis of land use conversion in 2007-2013 indicates that mixed garden and built-up increased considerably. These rises consume other land use types, including plantations, rice fields, and dry land agriculture. Other land use types remained constant. Logistic regression analysis concluded that the change of agricultural fields to built-up was influenced by several factors, including soil type, spatial plan and distance to the capital city. While factors affecting the interests of farmers were net agricultural income, total production and landrent. The Markov Chain accuracy in predicting land use of 2013 in Subang regency as much as 96.4%. This method is fairly accurate in predicting the use of mangroves, ponds, and forests
Keyword: Subang, farming interest, markov chain, logistic regression, land use change

Judul: Perubahan Penggunaan/Penutupan Lahan dan Faktor yang Mempengaruhinya (Studi Kasus: Kota Sukabumi, Jawa Barat)
Abstrak: The strategic position of Sukabumi City between Jabodetabek and Bandung Raya intensified the development in this region. It implied to the high of land use/land cover change (LUCC) in Sukabumi City. We utilized IKONOS in 2010 and 2012 to determine LUCC pattern. Furthermore, multiple regression was employed to find out affecting factors of LUCC. Skalogram analysis was then utilized to find out the level of regional development, descriptive analysis to correlate LUCC and level of regional development, and benchmarking of current utilization to evaluate the conformity of current land use/land cover with Spatial Plan (RTRW). The spatial analysis showed that within two years, built up area of Sukabumi increased at 2.8% while rice field and unproductive land decreased at 1.2% and 1.9% respectively. Factors affecting of LUCC in Sukabumi City were the availability of land; distance to CBD, allocation of Spatial Plan (RTRW); distance to economic, education, and medical facilities; regional development index; and the increase of population. Unproductive land change into agricultural land occured in 2nd hierarchy and 3rd hierarchy, whereas agricultural land change into built up area and unproductive land change into built up area occured in all of the hierarchy. Land use/land cover in 2012 conformed with RTRW was 36.6%, while 45.1% was undeveloped, and 2.3% was unconfirmed the plan.
Keyword: regional development, factors of change, land use/land cover change

Judul: Pertahanan pada ikan terhadap infestasi ichthyophthirius multifiliis dengan tetrahymena pyriformis dan tetrahymena thermophila
Abstrak: Ichthyophthirius multifiliis adalah protozoa dari kelas Oligohymenophorea, ordo Hymenostomatida dan famili Ophryoglenidae. Protozoa ini sering menyerang ikan liar, ikan yang dibudidayakan dan ikan hias dalam akuarium. Bentuk dewasanya (trophozoit) tinggal dibawah kulit ikan yang menjadi inangnya. Mereka makan runtuhan sel dan mengelupaskan epithel. Angka mortalitas dapat mencapai 100% pada ikan yang dipelihara dalam akuarium. Penyakit ini telah dilaporkan dari semua benua. Banyak preparat kimia yang dapat dipakai untuk mengontrol parasit ini. Yang paling berhasil dari antara preparat-preparat kimia yang digunakan adalah malachite green dengan konsentrasi 0.25 ppm yang dibiarkan bekerja selama 1 jam. Namun ada masalah yang timbul dalam pengobatan, karena di dalam hampir setiap perairan terdapat parasit tersebut. Hal ini menyebabkan sewaktu-waktu atau secara kontinyu terjadi infestasi oleh parasit ini dalam populasi ikan. Untuk mengatasi masalah ini maka tindakan yang dianggap praktis dan efektif untuk mengontrol parasit ini adalah imunisasi. Disinipun timbul permasalahan pula. Karena Ichthyophthirius multifiliis adalah parasit obligat, maka sulit mengumpulkannya dalam jumlah yang cukup untuk pembu- atan vaksin. Maka dicari sumber lain untuk membuat vaksin terhadap parasit ini. Hasil penelitian menunjukan bahwa Tetrahymena pyriformis dan Tetrahymena thermophila dapat dipakai sebagai vaksin terhadap Ichthyophthirius multifiliis. Masalah yang timbul kemudian adalah bahwa perlindungan terhadap Ichthyophthirius multifiliis ternyata tergantung pada strain (galur) atau isolat dari kedua spesies Tetrahymena di atas yang digunakan. Sebagai pertahanan bentuk lain dari ikan selain imunitas dapat dikemukakan ketahanan non imunologis yang tergantung pada spesies ikan dan kenaikan kadar vitamin C didalam makanan.
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