Judul: Sebaran Populasi dan Karakteristik Habitat Monyet Ekor Panjang Di Taman Nasional Gunung Merapi
Abstrak: Long-tailed macaque (Macaca fascicularis) is a widely distributed primate species which experiencing rapid population decline due to habitat loss and degradation, pharmaceutical usage and conflicts with human. Many researches regarding this species has been carried out, but not a particular topic on how volcanic eruptions affected its habitat. Gunung Merapi, a volcano located in Yogyakarta Province and was known as long-tailed macaque habitat, erupted in 2010 and made a massive destruction to the forest ecosystem. This research was aimed to identify the distribution of population, habitat characteristic and the correlation of habitat components to the existence of this monkey in Gunung Merapi forest ecosystem after the eruption took place. Spatial analysis was used to describe the distribution of population, while habitat characteristic was identified using vegetation analysis followed by chi square test. The result showed that 5 groups of this macaque were found spreading in 5 resorts of Gunung Merapi of which these regions were classified as slightly-damaged and moderately-damaged habitat. As for the diversity of plant species, an amount of 85 species was able to be identified and these species were found at the slightly-damaged and moderately-damaged habitats within a group of 82 and 29 species respectively. Of all these species only 21 and 11 species in each group were identified as the macaques’ diet. The result of Chi square test suggested a significant correlation between the existence of long-tailed macaque with habitat components of altitude, temperature, humidity, distance to farm, distance to water, plant species for diet, the number of vegetation species, and vegetation density (seedlings, saplings and trees).
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Judul: Populasi dan Habitat Monyet Ekor Panjang (Macaca fascicularis) di Kawasan Ekowisata Mangrove Wonorejo dan Sekitarnya, Surabaya
Abstrak: Long-tailed macaque is a diurnal nonhuman primate and can be found in various types of vegetation including mangrove forests to mountain forests. The purpose of this research is to identify the population and habitat of Longtailed macaque (Macaca fascicularis) in the Wonorejo Mangrove Ecotourism and surrounding areas, Surabaya. Method of observation population is concentration count and then method of habitat analysis is based on vegetation analysis. The minimum estimation of population size of Long-tailed macaque in the areas was 148 individuals. Sex-ratio of adult macaque was estimatied to be 1 : 2. Macaque population densities was 0,55 individuals/hectare. The Longtailed macaque’s eats are mangrove forest vegetations and animal. There was 9 kind of food, which 7 species of plants and the others species was animals. The macaque has highest tendency for using area in their daily life above the ground (40,54%) and only 29,73% individuals spend the day in bottom of the canopy.
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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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