Judul: Economic Valuation of Javan Gibbons (Hylobates moloch) in Ragunan Wildlife Park and Javan Gibbon Center
Abstrak: Owa jawa (Hylobates moloch) merupakan primata endemik Indonesia yang dilindungi dan terancam punah akibat perburuan dan perdagangan ilegal. Perhitungan nilai ekonomi owa jawa penting dilakukan sebagai dasar penetapan denda atau nilai tukar bagi pelaku kejahatan owa jawa. Penelitian ini bertujuan menganalisis hubungan antara karakteristik responden dengan nilai willingness to pay (WTP), menduga nilai ekonomi owa jawa berdasarkan pendekatan WTP pengunjung dan biaya pemeliharaan di Taman Margasatwa Ragunan dan Pusat Rehabilitasi Owa Jawa, serta membandingkan kedua metodologi valuasi ekonomi yang digunakan. Pengumpulan data dilakukan melalui studi literatur, observasi, dan wawancara kepada 145 orang pengunjung dan 2 sampai 4 orang pengelola. Variabel karakteristik responden yang berpengaruh nyata terhadap nilai WTP meliputi pendapatan, pekerjaan, jenis kelamin, dan tingkat pendidikan. Dugaan nilai ekonomi owa jawa berdasarkan WTP motif konservasi dan biaya pemeliharaan berturut-turut, yaitu sebesar Rp311.828,00/ekor dan Rp29.231.170,00/ekor. Biaya pemeliharaan merupakan metode yang efektif, efisien, dan menghasilkan nilai ekonomi yang dapat digunakan sebagai acuan denda perdagangan ilegal owa jawa., The Javan gibbon (Hylobates moloch) is an endemic primate to Indonesia that is protected and threatened with extinction due to hunting and illegal trade. It is important to calculate the economic value of the Javan gibbon as a basis for determining fines or exchange rates for perpetrators of Javan gibbon crimes. This research aims to analyze the relationship between respondent characteristics and willingness to pay (WTP) values, estimate the economic value of Javan gibbons based on the WTP approach of visitors and maintenance cost approach at Ragunan Wildlife Park and the Javan Gibbon Rehabilitation Center, and compare the two economic valuation methodologies used. used. Data collection were carried out through literature study, observation and interviews with 145 visitors and 2 to 4 managers. Respondent characteristic variables that have a significant effect on the WTP value include income, occupation, gender and education level. The estimated economic value of the Javan gibbon based on the conservation motive WTP and maintenance cost respectively approach is IDR 311,828.00/head and IDR 29,231,170.00/head. The maintenance cost is a more appropriate method to use because it is effective, efficient, and produces economic value that can be used as a reference for fines for illegal trade in Javan gibbons.
Keyword: biaya pemeliharaan, kesediaan membayar, owa jawa, perdagangan ilegal, valuasi ekonomi

Judul: Teknik Pemeliharaan dan Tingkat Kesejahteraan Owa jawa (Hylobates moloch) di Taman Safari Indonesia Bogor
Abstrak: Penurunan populasi owa jawa di alam semakin meningkat sehingga diperlukan adanya konservasi eksitu. Taman Safari Indonesia Bogor merupakan salah satu lembaga konservasi eksitu yang berkomitmen dalam penerapan prinsip kesejahteraan satwa. Penelitian ini bertujuan mengkaji teknik pemeliharaan, menilai tingkat kesejahteraan, dan mengkaji pemanfaatan owa jawa di Taman Safari Indonesia Bogor. Penelitian ini dilakukan di kandang penangkaran owa jawa yang berada di Taman Safari Indonesia pada Mei 2023. Metode yang digunakan yaitu pengamatan, pengukuran, wawancara, dan studi pustaka. Hasil penelitian menunjukkan bahwa teknik pemeliharaan (perkandangan, pakan, kesehatan, reproduksi, dan Sumber Daya Manusia) sudah sangat baik, namun tetap perlu adanya perbaikan terkait dengan adanya asap rokok dan perlunya penambahan variasi jenis pakan yang diberikan. Tingkat kesejahteraan owa jawa yang berada di dua penangkaran masuk dalam klasifikasi sangat baik dengan nilai kesejahteraan satwa di Penangkaran Penangkaran Burung sebesar 93,06 dan Penangkaran Rumah Dua sebesar 92,96. Pemanfaatan owa jawa yang berada di Taman Safari Indonesia Bogor dilakukan untuk rencana kegiatan pelepasliaran., The decline in the Javan gibbon population in nature is increasing so that ex situ conservation is needed. Taman Safari Indonesia Bogor is one of the ex-situ conservation organizations committed to implementing the principles of animal welfare. This study aims to examine maintenance techniques, assess the level of well-being, and evaluate the utilization of the Javan gibbon in Taman Safari Indonesia Bogor. This research was conducted in the Javan gibbon captivity at Taman Safari Indonesia in May 2023. The methods used were observation, measurement, interviews, and literature study. The results showed that maintenance techniques (housing, feed, health, reproduction, and human resources) were very good, but improvements were still needed due to the presence of cigarette smoke and the need to add variations in the type of feed given. The welfare level of the Javan gibbon in two captives is classified as very good with an animal welfare value in Bird Breeding captivity of 93.06 and Rumah Dua captivity of 92.96. The use of the Javan gibbon in Taman Safari Indonesia Bogor is carried out for planned release activities.
Keyword: Owa jawa, pemanfaatan, teknik pemeliharaan, tingkat kesejahteraan

Judul: Hydroxyapatite-Chitosan Composite Coating on Stainless Steel 316 to Improve Corrosion Resistance
Abstrak: Metals that were used in bone implantation should have good corrosion resistance that were not easily corroded when implanted into the body. Metal corrosion resistance of stainless steel 316 can be enhanced through the metal coating by hydroxyapatite-chitosan composite with composition ratio of hydroxyapatite (gram) and chitosan 3% (mL) 0.2:0, 0.2:0.1, 0.2:0.5, 0.2:1.0, and 0.2:1.5. Besides improving the corrosion resistance of metal, the presence of chitosan also maintain the position of hydroxyapatite on metal surfaces. Corrosion resistance increases with increasing amount of chitosan added and the best composition of hydroxyapatite-chitosan composite was 0.2:1.0.
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