Surplus production model for the tuna (Thunnus Sp.) in Makassar Strait Waters

Abstract

Abstract Tuna (Thunnus Sp.) is a pelagic fish with high potential and economic value in the Makassar Strait. This resource utilizes tuna handlines and purse seine units, and the number of gears has increased. Therefore, effective management is crucial to ensure optimal productivity. This study analyzes the catch and effort at maximum sustainable yield (MSY) of tuna (yellowfin and bigeye) in Majene Regency, West Sulawesi Province, from 2007 to 2022, using catch per unit effort (CPUE) and production data. The analysis includes the equilibrium approach and the Schaefer model to understand the subject comprehensively. In July 2022, the highest tuna catch was 143.47 tons (84.67 tons of yellowfin tuna and 58.8 tons of bigeye tuna). The average CPUE for tuna was 4.7 tons per unit, with a CMSY of 1,113.99 tons per year and an EMSY of 128 units per year. During 2014, 2015, 2019, and 2020, the biomass trend decreased, and overfishing occurred.

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