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Home  >  Transasctions of NAMP VOL3

35. Modeling the impact of Reserve Zones on MSY and Coexistence Equilibrium Points for a Bioeconomic Model of Tilapia and Nile Perch by A. Umar and S. Musa Transactions of NAMP Volume 3, (Jan. 2017), pp 271 – 278
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Fish populations are becoming increasingly limited, catches are declining due to overexploitation and extinction of fish biomass as a result of difficult sustainability of fish stock. The aim of the research is to determine an optimal harvesting strategy which fulfills the economic objective of the harvester while maintaining the population density of the fish species over a prespecified threshold values throughout the harvest. To achieve that, the research developed a modified version of a bioeconomic model for Prey-Predator interaction in Polluted Environment with Constant Harvesting by incorporating reserve zones. Maximum Sustainable Yield (MSY) and coexistence equilibrium points of both Tilapia and Nile perch are determined. The study revealed that, migration rate beyond  has no impact whatsoever on the MSY and coexistence equilibrium point of the Tilapia and Nile perch. Similarly, the study revealed that the optimal economic rent of Tilapia and Nile perch species in unreserve zone increases with varied migration rate. Thus, the study recommends creation of reserve zones for efficient control of overexploitation and extinction of fish biomass in both reserve and unreserve zones and Migration rate at  should be kept.

Keywords: Bioeconomic, Reserve Zone, MSY, MEY,Coexistence equilibrium point.