Bioeconomic Model of Threadfin Bream Fish Resources in Banten Bay Waters

Abstract

Threadfin bream or Nemipterus sp. becomes one of the fish resources utilized in Banten Bay waters. The catch of threadfin bream decreased from year to year. Therefore, threadfin bream resources in the Banten Bay waters have alleged over-exploited. This study aims to analyze the optimum utilization of threadfin bream fish resources, seen from three management positions namely maximum sustainable yield (MSY), maximum economic yield (MEY) and open access equilibrium (OAE). Bio-economic analysis was carried out using the Gordon Schaefer model. Economic parameters that used in this research are price and fishing cost. Biological parameters are estimated using the Schaefer model. The set gillnet, Danish seine, and trammel net are the fishing gear for catching the threadfin bream in this research. The result shows that the maximum sustainable yield of threadfin bream is 1,344 tons/year and the optimum effort is 2,298 units/year. The productions rate of threadfin bream from 2007 continued to decrease until 2016. The highest economic profit was obtained in MEY of IDR 12.9 billion. The actual condition of threadfin bream fisheries is still under the condition of MEY management. The utilization of threadfin bream can still be optimized, but it needs to be done carefully and wisely so as not to cause damage to fish resources and the environment. The decrease in catch and CPUE needs to be aware of symptoms of overfishing.