Judul: Model of management of capture fisheries area in Banten Bay
Abstrak: Banten Bay is area which quite rapid development for many activities. Industrial waste disposal, domestic, over fishing, coral exploitation, reclamation, vessel traffic, and environmental damage, cause interest multi sector conflict in managing sea area. General objective of the research is to create model of management of sustainable capture fisheries area in Banten Bay. The specific objectives are to (1) determine utilization status and development prospect of capture fisheries; (2) determine leading commodity; (3) determine environmentally friendly fishing gears, (4) establish utilization zone; (5) arrange policy strategy in managing capture fisheries; and (6) simulate of model of management of capture fisheries. Evaluating utilization status and development prospect of capture fisheries was conducted using surplus production method with bionomic model. Determination of leading commodity was conducted with LQ value, IS, and descriptive method. Environmental and sustainable fishing gear was analyzed using CCRF criteria with scoring method approach. Zoning of capture fisheries area utilization was conducted by GIS. Management strategy of capture fisheries area was conducted with SWOT and AHP. Simulate of model of management of capture fisheries was conducted with LGP and model simulation of sustainable fish resources and salary fisherman. The result showed that utilization status and development prospect of capture fisheries in Banten Bay can still be developed for 9 species from 23 species. Squid, anchovy, and crab were commodities with high comparative advantages. Hand line, boat lift net, and gillnet were environmentally fishing gears. Zoning of Banten Bay utilization are consist of aquaculture, recreation, conservation, capture fisheries, fishing port, and industrial zone. Zone of capture fisheries was composed base on fishing ground eligibility indicator, suitability of fishing gear with fishing ground, minimum of conflict potency, availability of infrastructure, and environmental carrying capacity. Capture fisheries zone is divided into three zones, that are (i) passive zone, (ii) passive and outboard fishing boat zone, (iii) active and inboard fishing boat zone. Based on LGP analysis, maximum catch was 1.747,259 ton/year, alocation for fishing gear of gillnet, danish seine net, set lift net, boat lift net, boat seine, hand line, guiding barrier trap, and monofilament gillnet were 3, 11, 11, 6, 2, 5, 0 and 0 unit, respectively. The proposed strategy in managing Banten Bay area were (1) utilization strategic location of Banten Bay with optimalization leading commodity for providing fish demand; (2) taking advantage of high availability of human resources and fisherman concern to manage capture fisheries area; (3) utilization local government support and regional autonomy to make policy in structuring and expansion of fishing area and involving coastal communities in the management. Model of management of capture fisheries area in Banten Bay can be increase of salary fisherman as much as 25% from first scenario and take care of sustainable fish resources the periode of time 18 years.
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Judul: Capture fisheries management model in alas strait West Nusa Tenggara
Abstrak: Capture fisheries in Alas Strait of Nusa Teggara Barat contributes an important role not only for fishers, but also for local communities. Previous research showed that fish resources in this area need an appropriate management immediately. However, the scientific information as management option of the commodities in this area is very poor. This research intended to: identify the selected priority of fish resources, asses stock, define exploitation status of the selected priority of fish resources, define appropriate fishing gears, optimize the number of fishing gears to exploit the selected priority, formulate management model for capture fisheries in Alas Strait. Scoring method was applied for selecting the fish resources and the appropriate fishing gears, while surplus production model (Schaefer model) was used to asses the fish stock size. Linear goal programming was applied to allocate the number of fishing gears used in the stock fishing. There were five species of fishes identified as selected priorities: squid, sardine, red snapper, anchovy, and herring. Of the five selected fishes, the highest maximum sustainable yield (MSY) was anchovy (7,915.76 tons/year) followed by red snapper (2, 00.01 tons/year), sardine (1,282.21 tons/year), herring (867.49 tons/year), and squid (638.40 tons/year) respectively. The exploitation status of these selected commodities was classified into three categories. They were over exploited (squid), fully exploited (sardine and herring) and lightly exploited (anchovy and red snapper).This research also identified four appropriate fishing gears to exploit fish resources in Alas Strait. They were purse seine, boat lifting net, gill net, and hook and line. Refers to total allowable catch (TAC) of each fish species, fishing gears yearly productivity, requirement of gasoline, lubricant, spirituous liquid, ice blocks, number of fishers, and benefit gotten by each fishing gears, the optimum number of fishing gears allocated to exploit the selected priority fishes in Alas Strait is purse seine 43 units, lift net 30 units, gill net 395 units, and hand line 1628 units. The whole process constructed model is applicable not only in Alas Strait, but also in other areas similar to Alas Strait condition.
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Judul: Metrik Einstein (Anti-) Self-Dual Berdimensi Empat dengan Metode Cartan
Abstrak: Gravitational field equation can be formulated in differential forms (differential geometry), which describes gravity as a manifestation of the curvature of space-time. Curvature of space-time is characterized by a metric that satisfies the gravitational field equation. With differential forms it can be formulated the (anti-) self-dual Einstein equation, which is a modification of the Cartan structure in (anti-) self-dual basis. Calculation of (anti-) self-dual metric with (anti-) self-dual Einstein equation is simpler than the calculation using Christoffel symbols.
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