Judul: Estimation of Sunda Clouded Leopard Population and Its Habitat Suitability and Connectivity in Batutegi Protected Forest Lampung
Abstrak: Salah satu spesies karnivora yang paling langka dan paling sedikit dipahami, macan dahan sunda (Neofelis diardi) menghadapi ancaman besar akibat hilang dan terfragmentasinya habitat yang terus berlanjut. Hutan Lindung Batutegi yang diidentifikasi sebagai habitat macan dahan sunda, juga mengalami fragmentasi dan perambahan. Ancaman-ancaman tersebut telah menyebabkan berkurangnya ketersediaan habitat yang sesuai bagi populasi macan dahan sunda yang sudah terisolasi dan menciptakan hambatan yang membatasi pergerakannya. Pemahaman terhadap kondisi populasi macan dahan sunda, faktor-faktor yang mempengaruhi pemilihan habitatnya, dan pengembangan koridor ekologi untuk meningkatkan konektivitasnya sangat penting bagi konservasi macan dahan sunda di Hutan Lindung Batutegi. Penelitian ini mengkaji data camera trap yang dipasang pada periode Maret – Desember 2023 dan menggunakan spatially explicit capture-recapture (SECR) untuk menganalisis kepadatan populasi macan dahan Sunda. Pemodelan maximum entropy (Maxent) digunakan untuk membuat peta kesesuaian habitat, yang kemudian digunakan untuk membuat permukaan resistansi untuk melakukan analisis konektivitas habitat menggunakan pemodelan least-cost path (LCP). Macan dahan sunda yang teridentifikasi berjumlah lima individu dengan sex ratio satu jantan dan satu betina (1:1) serta dua kelompok umur yaitu muda dan dewasa. Perkiraan kepadatan macan tutul sunda adalah 2,23 individu/100 km2. Hasil penelitian menunjukkan bahwa area studi mampu mendukung keberadaan macan dahan sunda, dengan tingkat kesesuaian sedang dimana keberadaan macan dahan sunda didorong oleh keberadaan lanskap hutan dan area berelevasi tinggi. Prediksi jalur-jalur konektivitas menunjukkan bahwa koridor yang paling sesuai dapat memfasilitasi pergerakan macan dahan sunda dari satu kawasan hutan ke kawasan hutan lainnya dengan melintasi matriks petak hutan dan kebun campuran dan menghindari perkebunan monokultur. Implikasi pengelolaan yang dapat mendukung konservasi macan dahan sunda adalah dengan memastikan kawasan budidaya menjadi semakin heterogen sehingga menyediakan koridor yang lebih permeabel., One of the rarest and least understood species of carnivore, the Sunda clouded leopard (Neofelis diardi), is facing considerable threats from continued habitat loss and fragmentation. The Batutegi Protected Forest, which was recently identified as an existing, but isolated habitat of this vulnerable felid, is also experiencing fragmentation and encroachment. These combined threats have led to a reduction in the availability of suitable habitat for this isolated population and creates barriers restricting its movement between forested areas. Understanding the condition of the Sunda clouded leopard’s population, the influencing factors for its habitat selection, and ecological corridors development to improve its connectivity is critical to the conservation of the Sunda clouded leopard in Batutegi Protected Forest. This research examined camera trap data installed in March – December 2023 period and used spatially explicit capture-recapture (SECR) to analyze the population density of the Sunda clouded leopard. Maximum entropy (Maxent) modeling was used to construct a habitat suitability map, which was used to develop the resistance surface for performing habitat connectivity analysis using least-cost path (LCP) modeling. There were five individual Sunda clouded leopards identified with the sex ratio of one male to one female (1:1) and two age groups of juvenile and adult. The estimated density of the Sunda clouded leopard is 2,23 individual/100 km2. The results indicated that there was a moderate potential that some areas of the study region to support the occurrence of Sunda clouded leopard, whose presence appeared to
Keyword: habitat connectivity, habitat suitability, population density, sunda clouded leopard

Judul: Sebaran Spasial dan Tipe Metapopulasi Macan Dahan (Neofelis diardi Cuvier, 1823) di Taman Nasional Sebangau, Provinsi Kalimantan Tengah.
Abstrak: Sunda clouded leopard (Neofelis diardi Cuvier, 1823) is top predator in Sebangau National Park (SNP) forest which their existence are more threats caused by loss and fragmentation habitat in order that is potential to make N. diardi devided in to be several sub population or known as a metapopulation. This study aimed to obtain information about the spatial distribution of sunda clouded leopard in SNP and predict the risk of local extinction by identifying the type of metapopulation. Data collection was conducted from June until November 2014 by using study literature method, interviews, download, field orientation and combination of direct and indirect observation methods such as track set, grid, camera trap, and sign of animal (footprints, feces, claw, scratch, scrape, and voice). This study showed that distribution of N. diardi influenced by the distance from water sources (P = 0.002) and potential disturbance (P = 0.017), forest canopy cover (P = 0.04), peat depth (P = 0.002), and the type of habitat in SNP (P = 0.011) also the presence and abundance of preys, but only the altitude factor didn‟t affect toward distribution of N. diardi (P = 0.064). Spatial distribution patterns of N. diardi in SNP was clumped (x2hitung = 39.67, x20.025 = 26.12) with type of metapopulation was patchy population due to fragmentation from the existance of canal network so it had a low risk of local extinction, but the type of metapopulation could be changed by following the changes of habitat connectivity and the existence of threat to the N. diardi and their habitats.
Keyword: distribution, metapopulation, Neofelis diardi, sebangau national park

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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