Exploitation level of shortfin scads fish (Decapterus macrosoma) caught with purse seine in Bulukumba waters, South Sulawesi

Abstract

Abstract Shortfin scads fish is a pelagic fish that has an important role in the economic sector of fishermen in South Sulawesi waters. In the last five years, there has been a decline in catch resulting from uncontrolled exploitation. However, there is no control instrument for the exploitation of shortfin scads fish to date, hence, there is a concern that the sustainability of shortfin scads fish resources will be threatened. This study aimed to determine the exploitation level of shortfin scads fish (Decapterus macrosoma) caught with a purse seine. The research was carried out in the waters of Bulukumba Regency, South Sulawesi, from April to August 2018. The method used was direct observation. Data on catches were recorded based on the fish species caught at the time of hauling. Data time series of shortfin scads fish and effort data tabulated from fisheries statistical data. Maximum sustainable yield (MSY) of shortfin scads fish in Bulukumba waters in 2016-2017 exceeded the maximum sustainable production (MSY) of 10,739 tons/year (overfishing). The regression analysis between effort and CPUE Schafer model, showed the estimation parameter intercept value (a) 42.38620491, slope (b) -0.041823411. The equality relationship interpreted as the fishing effort for f units per year will reduce the production value (CPUE) of shortfin scads fish by 42,386 tons/year. The estimation of sustainable potential value (MSY) of shortfin scads fish in Bulukumba waters was 10,739 tons/year, while the optimum fishing effort (fopt) was 507 units/year and the total allowable catch (TAC) 8,591 tons/year.