Judul: Swiftlet’s House Environment Characteristics and The Production of Edible-Swiftlet Nest of Collocalia fuciphaga in Haurgeulis, Indramayu District, West Java
Abstrak: Swiftlets farmings have various problems such as the reduction in population and swiftlets’s nest production due to the variabilities of environment characterictics around the swiftlets’s house. The purposes of this research were to detect the factors that influence swiftlets’s nest production, characteristics of the swiftlets’s houses, and also location and condition of the swiftlets’s nest production in Haurgeulis, Indramayu District, West Java. The general characteristics of swiftlets houses and their surrounding, microclimate inside the swiftlet’s houses (temperature, relative humidity, light intensity and their edible-swiftlet nest production) were observed in this study. There were four swiftlet’s houses (A, B, C and D) observed in this study. The design and construction of those houses affected the microclimate inside the houses, thus affected the population and production of edible-swiftlet nest of Collocalia fuciphaga. The daily temperature inside the swiftlet’s house of A, B, C and D were 26.10-29.73°C, 30.03-31.98oC, 25.35-27.5oC and 27.7-29.25oC, respectively. The daily humidity inside the swiftlet’s house of A, B, C and D were 69.5-85.5%, 59-65%, 77.75-92% and 83.25-93.25%, respectively. The light intensity of all houses was 0 lux. The production of nest and swiftlets population inside the swiftlet’s house of A, B, C and D were 76 nests (190 heads), 136 nests (340 heads), 10 nests (25 heads) and 81 nests (203 heads), respectively. Haurgeulis had 3997 ha of paddy field and 204 ha of garden area (65.71% and 3.35% of total area in Haurgeulis). Haurgeulis is also surrounded by 4.753,55 ha teak plantation (Tectona grandis), located in Gantar, Cikandung, and Tamansari (BKPH Haurgeulis, 2011). The reduction in swiftlet population and swiftlet’s nest production, the presence of nuisance animals in the swiftlet’s house, thieve of the nest, and illegal payments were identified as farmer’s problem in increasing edible-swiftlet nest production.
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Judul: Keanekaragaman Jenis Burung pada Beberapa Cluster Perumahan di Sentul City, Bogor Jawa Barat
Abstrak: Sentul City held the eco-city concept and has a unique landscape with a variety of topography. This area has a variety of vegetation structure and composition which are distributed in several residential clusters. One of the biodiversity that can be found in this area is bird. Variety of habitat types will influence the bird diversity in each area (Blendinger and Ricardo 2001). The objective of this research were (1) to describe the habitat of birds, (2) to examine bird diversity, (3) to compare the bird composition among cluster types, (4) to examine vertical and horizontal distributions of birds in several vegetation and tree architecture, (5) to examine the influence of tree architecture on tree utilization by bird. The research was conducted in Sentul City from June to September 2011, in the area of research are five residential cluster which are selected by the age of cluster and composition of vegetation, and one location is a boulevard. The habitat condition and vegetation (dominant vegetation, tree height, type of tree architecture, vertical and architecture utilized side) are described with qualitative data and collected by direct survey. Bird data is collected by MacKinnon species list method (MacKinnon et al. 1998) with 10 species of birds each list. Bird diversity analyzed by using species area curve, meet frequence and index of similarity. Utilization of vegetation using descriptive analysis. A total of 42 species of bird from 24 families were recorded in this research. There were 6 species cannot find and 25 new species recorded compare by the result of AMDAL Bukit Sentul at 2000. The highest bird diversity found in Northridge cluster with 33 species of bird and the lowest bird diversity found in Venesia-Pasadena-Sakura cluster. Based on MacKinnon species list result, showed the leveled out of curve. It showed there was nothing increment of bird species at research location. Some of birds have a high number of meet frequence in one location, but cannot find in other location. It showed there was a low distribution of bird species. The highest similarity index was found between Bali cluster and Venesia-Pasadena-Sakura cluster (IS=0.76). In general, most of bird can be found at 2/3 of tree crown except in Argenia cluster. Midlde branching part of the tree crown are the most utilize part by bird. There are management method that can impelement, (1) provide and defence birds habitat, (2) planting a favourite vegetation for birds, (3) establish protected area for birds, (4) research on bird diversity in other locations, (5) intensively monitoring on bird diversity, (6) Sosialization in the importance of bird diversity, (7) develope an environmental education programs.
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Judul: : Persamaan Tunggal sebagai Representasi Kurva Komposit
Abstrak: A mathematical method is introduced to represent a composite curve based on an extension of analytic geometry. The representation is given either with a single equation or with two equations, in the case of parametric representation. This method permits the representation of composite curves in similar manner to the conventional representation of non-composite curves. Some mathematical tools, including Heaviside unit step function and periodizer function, are used in the establishment of a single equation. In this paper, regular equations of regular and irregular polygon, as well as composite curves of two dimensions, are implemented using a computer algebraic system, Mathematica.
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