The multi-species fisheries model of fringescale sardinella and largehead hairtail in Rembang Regency, Indonesia

Abstract

The characteristics of fisheries in Rembang Regency are multi-species fisheries. There is a production relationship between fringescale sardinella fish (Sardinella sp.) and largehead hairtail fish (Trichiurus sp.). It is suspected that the two types of fish have a predator-prey relationship (largehead hairtail fish as predator and fringescale sardinella fish as prey). The purpose of this study was to develop the multi-species model of fringescale sardinella and largehead hairtail in Rembang Regency. This study used time series data from 2010 to 2018, both production and fishing effort data. We also conducted observations and indepth interviews. This study produced a predator-prey model that can be used as a basis for fisheries management especially for fringescale sardinella and largehead hairtail fisheries. The results of the study can be used to estimate the optimal level of fishing effort for the production of fringescale sardinella (459 units of mini purse seine) and largehead hairtail (176 units of mini purse seine). While the optimal profit occurs in the fishing effort of 184 units of mini purse seine