نتایج جستجو برای: bioeconomic models

تعداد نتایج: 908293  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم انسانی 1389

rivers and runoff have always been of interest to human beings. in order to make use of the proper water resources, human societies, industrial and agricultural centers, etc. have usually been established near rivers. as the time goes on, these societies developed, and therefore water resources were extracted more and more. consequently, conditions of water quality of the rivers experienced rap...

2001
J. Kropp K. Eisenack

The understanding and management of marine processes and resources is of great economic and social importance. Marine resources have been greatly exploited, which has led to a thriving but unadopted fishery infrastructure and brought about a number of negative environmental impacts. However, the main reason for the non-prosperous rationing of marine resources is the lack of knowledge about cert...

2010
Gregory McKee Colin A. Carter James A. Chalfant Rachael E. Goodhue

When a species invades an agricultural system, policymakers and producers need ways to compare the cost and benefits of control alternatives. In this paper, we examine the greenhouse whitefly invasion of California strawberries and a set of control alternatives, along with the effects of the information included in the analytical framework. The greenhouse whitefly invasion into California straw...

2009
T. K. Kar Kunal Chakraborty

The present paper deals with a surplus production model of Verhulst-Schaefer for Bangladesh shrimp fishery to develop a static as a well as dynamic framework to investigate the optimal utilization of the resource, sustainability properties of the stock and the resource rent earned from the resource. The basic objective of this paper is to provide the way through which long run sustainability ca...

2000
John C.V. Pezzey Callum M. Roberts Bjorn T. Urdal

We model the effect of a no-take reserve in a marine fishery management area, such as on a coral reef. Implicitly, eggs and larvae are mobile but adults are not; and there is open access fishing outside the reserve. A reserve is found to increase equilibrium catch if the prior ratio of stock to carrying capacity is less than a half, and the catch-maximising reserve proportion rises towards a ha...

1996
Richard F. Kazmierczak

For simulation to be truly useful for investigating many problems in agricultural economics, non-simplifying optimization techniques need to be employed. General methods for simulation optimization that do not inhibit system characterization or analysis are available, and they would appear to provide much of the mathematical and optimizing rigor demanded by economists. This paper describes the ...

2016
David Finnoff Arthur J. Caplan DAVID FINNOFF

111 We present a computable general equilibrium model of the interface between the Great Salt Lake (GSL) ecosystem and the regional economy that impacts the ecosystem. With respect to the ecosystem, the model treats the various representative species as net-energy maximizers and bases population dynamics on the period-by-period sizes of surplus net energy. Energy markets-where predators and pre...

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