Judul: Simulation Model of Dynamic Yield Regulation (Case in KPH Blora, Cepu, and Randublatung Perum Perhutani Unit I West Java).
Abstrak: Pressure about forest resources can cause happen over exploitation until of forest resources not capable to give optimal benefit in fact on contrary, forest sustainable more offer decrease. The excalation of population in around forest area cause pressure about forest can effect to increase use area for settlement with construction wood and fuel wood consumption. The management of forest in Java Island which is whole almost of plant forest, at this time used one method of yield regulation of which is used in entire area of productin forest. This method only enter stand of forest factor, with the result of approach that currently used for aimed at method yield regulation of forest have the quality of partial. This research is aimed to arrange dinamics yield regulation of forest method in KPH Blora, Cepu, and Randublatung and study wood consumption effect for model of yield regulation by used. According to result khi-square test (X2) for KPH Blora shows X2 hitung 3,77 and values X2 tabcl shows 16,92 on confidence level of 95% by degrees of freedom 9. X2 hitung values more liitle than X2 tabcl can be conclusion that variability of simulation data not difference evidence with variability of actual data. For KPH Cepu according of result khi-square test (X ), shows X2 hitung 9,15 and X2 tabcl 16,92 on confidence level of 95% by degrees of freedom 9. X2hitun2 values more little than X2 tabcl, can be conclusion that variability of simulation data not difference evidence with variability of actual data. For KPH, Randublatung shows X2 hitung 3,31 and values X2 tabcl shows 16,92 on confidence level of 95% by degrees of freedom 9. X2 hitung values more liitle than X2 tabcl, can be conclusion that variability of simulation data not difference evidence with variability of actual data. According to scenario influence of construction wood and fuel wood consumption to fluctuation wood production (etat volume), sum of tree steal and enterprise profit in each KPH of result that : at KPH Blora of simulation result during 20 next years shows increase fuel wood consumption 50%, consequence of decrease etat volume 13.593,31 m or 3,34 %; increase sum of tree steal shows 66.176 tree and decrease KPH Profit shows Rp 12.158.321.453,- or 6,57.
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Judul: Simulasi Pengaturan Hasil Hutan Kayu Berdasarkan Jumlah Pohon pada Hutan Alam Produksi di Kalimantan Timur
Abstrak: Yield regulation used in The Bussiness Plan (RKU) long term 10 years using a method based on the volume of timber and extensive acreage. Determination of annual allowable production based on volume and wide can describe the availability of the raw material wood round, but could not become the tool of control sustainable natural production forest because of the current forest conditions the high fells of the former forest. Therefore, the simulation of yield regulation based on the number of trees conducted to improve the methods and complete the aspects of yield regulation as long as it is used in every company of forestry. This research using the methods which is, group of types and trees diameter, calculation of the number of trees, simulation calculation of the stands are worthy of slash, classification of plots, and mapping the distribution of plots. Analysis of data was conducted on the calculation of the stand’s volume by using a formula that based on the research of Direktorat Jenderal Bina Program Kehutanan Edisi Khusus (DJBPKEK) No. 51 A tahun 1983 with the formula V = 0.0001234 D2,49130 for the Dipterocarpaceae and V = 0.0001450 D2,42950 for the non Dipterocarpaceae. Simulations was carried out with two approaches, with and without observe to access. Approach with regard to access is the yield regulation approach in the form of a grouping of the plots cutting which will be managed by considering access, while approach without regard to access is the yield regulation appoarch in the form of a grouping of the swath slash which will be managed by the assumption that all of the plots cutting can be accessed, so the company can manage all plots cutting. The result of research about yield regulation simulation based on the number of trees shows that the length of cutting rotation is 70 years, by the standing stock at least up to 50 cm, 25 tree/ha. Annual quota of production based on the number of trees in diameter 50 cm up as many as a year 15.843 tree with a volume of 40.467 m3/years, and the acreage of 800 ha a year.
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Judul: Embriogenesis ikan buta (Astyanax fasciatus)
Abstrak: Ikan buta Astyanax fasciatus adalah spesies ikan unik dari famili Characidae yang menempati perairan dalam gua di Wilayah La Cueva Chica-San Luis Potasi-Mexico. Ikan ini memiliki mata yang tereduksi (Blind Cavefish) dan warna kulit merah muda, pucat serta mengkilap.
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