Predator-prey model of exploited fish population Arowana (Scleropages spp.)

Abstract

Interactions in the ecosystem are inseparable from predator-prey interactions. Population model of two species that the predator interacts with its prey for its survival has been developed. The growth rate of a predator depends on predation on its prey. The model used to describe this predation is the Holling Tanner II function. This model also includes a catch variables of prey and predator populations. This formulation provides more realistic picture of exploited fisheries, such as Scleropages spp. (arowana) that prey on small fish and shrimp. The purpose of this study is to analyze the model of predator-prey and to interpret on the model based on simulation. High of exploitation rate will lead to rapid population decline. Exploitation rate ranges from 0 ≤ h ≤ h max, where h max is the maximum exploitation rate. Results of these simulation show that population of the predator fish will become extinct if exploitation rate exceeds the maximum exploitation rate.