Model Dinamis Bioekonomi Ikan Lemuru (Sardinella Longiceph) di Selat Bali serta Penilaian Deplesi Sumberdayanya

Eugenia Mardanugraha and Riyanto
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Eugenia Mardanugraha: Researcher, Institute for Economic and Social Research, Faculty of Economics, University of Indonesia, Jakarta
Riyanto: Researcher, Institute for Economic and Social Research, Faculty of Economics, University of Indonesia, Jakarta

Economics and Finance in Indonesia, 2002, vol. 50, 115-130

Abstract: Lemuru, the about 80% of fish production in Bali strait, is one of the most important fishes in Bali strait. Moreover, labor that involved in fish activity is about 61%. Thereupon the economic analysis in Bali strait is highly related to the analysis about the economic of Lemuru. The dynamic economic analysis can be implemented to count the optimum catching which maximize the net profit of the whole efforts of Lemuru. The biological conditions of Lemuru, which are reproduction, growth and the interaction between production of young lemuru and old lemuru, are used as constraints to solve the maximization problem. This optimization problem is solved by using Lagrange multiplier and Kuhn Tucker conditions. Kuhn Tucker condition is one technique to solve non-linear programming problem. To describe its biological conditions, Lemuru are divided into young and old Lemuru. In one year, young Lemuru will grow to be old Lemuru and the old ones will reproduce young Lemuru. In market, the young Lemurus are cheaper than the old ones. The population of Lemuru is predicted to be equilibrium in 2010 in the level 245,634.395 tons for the old Lemurus and 110,070.564 tons for the young ones. To reach the equilibrium, fishermen should catch 95,309.640 tons for old Lemuru and 29,768.135 tons for young Lemuru in a year.

Keywords: Deplesi; sumberdaya; –; Model; matematika; -; Indonesia (search for similar items in EconPapers)
Date: 2002
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