Judul: Analysis of Home Range and Habitat Suitability Model of The Large Flying Fox (Pteropus vampyrus) in West Java Province
Abstrak: Kalong memiliki wilayah jelajah yang luas sehingga pemodelan distribusi spasial diperlukan untuk mengidentifikasi kesesuaian habitatnya. Satwa ini memiliki peranan penting bagi ekosistem meskipun dipercaya sebagai reservoir virus. Penelitian ini bertujuan untuk menganalisis pergerakan harian, wilayah jelajah, variabel yang berpengaruh terhadap kesesuaian habitat dan risiko virus nipah di Provinsi Jawa Barat. Titik perjumpaan dua individu kalong direkam pada tahun 2017-2018 menggunakan satellite telemetry ARGOS (Advanced Research and Global Observation Satellite). Analisis pergerakan harian dan wilayah jelajah menunjukkan hasil yang berbeda dari kedua individu dengan kecenderungan untuk tidak berpindah jauh dari titik awal perekaman. Nilai akurasi model kesesuaian habitat menunjukkan hasil sangat baik (AUC 0,975) dengan pengaruh variabel tertinggi yaitu curah hujan dan suhu. Salah satu habitat yang sesuai untuk kalong terdapat di Cagar Alam Leuweung Sancang. Pemetaan area risiko virus nipah menunjukkan sedikit lokasi yang memiliki risiko tinggi dalam penyebaran virus nipah., The large flying fox has a wide home range so that spatial distribution modelling is required to identify the suitability of its habitat. This animal has an important role for the ecosystem although it is believed to be the reservoir of viruses. This study aims to analyze the daily movement, home range, variables that affect habitat suitability and risk of nipah virus in West Java Province. The presence point of the two individuals was recorded in 2017-2018 using ARGOS satellite telemetry. Analysis of daily movements and home ranges showed different results from both individuals with a tendency not to move far from the starting point of recording. The accuracy value of the habitat suitability model shows excellent results (AUC 0.975) with the highest variable influence of rainfall and temperature. One of the suitable habitats for kalong is found in Leuweung Sancang Nature Reserve. Mapping the risk area of nipah virus shows few locations that have a high risk in the spread of nipah virus.
Keyword: kalong, habitat, pergerakan harian, virus nipah, wilayah jelajah

Judul: Daerah jelajah dan penggunaan ruang Kukang Jawa (Nycticebus javanicus) di Taman Nasional Gunung Halimun Salak Jawa Barat
Abstrak: The Javan slow loris (Nycticebus javanicus) is a slow moving nocturnal prosimian primate. Javan slow lorises are considered Critically Endangered by the International Union for the Conservation of Nature (IUCN 2013), as well as being listed in Appendix I of Convention on International Trade in Endangered Species (2007). To date, there is limited source information available regarding wild loris ecology and behavior. In this study, home range areas and use space of wild javan slow loris was carried out in Mount Halimun-Salak National Park, in Bogor, West Java, Indonesia. This study aims to measure home range size and to analyze activity budgets in natural forest conditions. Kernel Home range methods were used to analyze home range areas, while Point Centered Quarter methods were used to collect habitat data, and five minute Instantaneous-Focal Animal Sampling was used to observe and record behavioral data. The observed lorises were two adult females, one of which (Individual I) was pregnant. Analysis showed contiguous home range sizes of 5.43 hectares and 5.58 hectares for Individuals I and II respectively, as well as a core home range area of 1.77 hectares and 1.60 hectares. These home ranges were larger than that reported in Malaysian Nycticebus coucang. Behavioral analysis showed that daily activities were dominated by travel, feeding, active, and foraging, which took place primarily in the lower canopy stratum (2 – 15 m), whereas sleeping typically occurred in the medium canopy stratum height (15 – 22 m). The use of space of javan slow loris correlated with height, substrat, contact, and size of branch. Javan slow loris preferred heights positions (5 – 7 m), and the size of a small twig branch categories. Javan slow loris preferred to use kaliandra (Calliandra calothyrsus), bungbuai (Plectomia elongata), and kisampang (Evodia latifolia) as foraging site and sleeping tree.
Keyword: Bogor Agricultural University (IPB), lower canopy, kernel home range, sleeping tree, Core area

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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