Bioeconomics of shortfin scad (Decapterus macrosoma) landings at Nusantara Fishing Port (PPN) Tasikagung, Indonesia

Pelagic fish resources are one of the most important potential resources in Indonesian waters. One small pelagic fish that has high economic value and is currently in high demand is the shortfin scad (Decapterus macrosoma). The production of D. macrosoma in the Nusantara Fishing Port (PPN) Tasikagung is very large. This has led to increased fishing efforts without regard to the existence and sustainability or conservation of the species. This study specifically discusses the bioeconomic analysis of the fishing of D. macrosoma. Therefore, this study aims to make a significant contribution to the development of D. macrosoma fishing in the PPN Tasikagung and surrounding areas. The bioeconomic study of D. macrosoma fishing uses the Gordon Schaefer model, which includes Maximum Sustainable Yield (MSY), Maximum Economic Yield (MEY), Open Access Equilibrium (OAE), utilisation rate and exploitation rate. Several aspects to be assessed in this study include technical aspects of fishing, bioeconomic aspects of fisheries, and utilisation rates. Data collection was carried out through observation, interviews, documentation, and literature studies. The results of the study obtained an average CPUE value for the 2020–2024 period of 29.193 kg per unit. Under MSY conditions, a C_MSY value of 15,283,570 kg was obtained, an E_MSY value of 601 fishing gear units per year with a profit of IDR 56,181,648,063. Under MEY conditions, the C_MEY value was 15,283,338 kg, the E_MEY was 599 fishing gear per year, with a total profit of 56,182,508,405. Fishing efforts under OAE conditions yielded a C_OAE value of 237,371 kg per year and an E_OAE of 1,198 fishing gear units per year. The level of exploitation of D. macrosoma resources has reached moderate exploitation with an exploitation rate of 95% and an effort rate of 85%, and the level of exploitation produces an effort of 1.19, which means 0.5 ≤ E < 1= Fully exploited. Fishing efforts are closely monitored to ensure that the D. macrosoma resources at the PPN Tasikagung are not overfished, thereby supporting the sustainability of D. macrosoma fishing efforts in the future and improving the welfare of the fishermen themselves.