Application of Surplus Production Model to the Tuna (Thunnus Sp.) in Makassar Strait waters Muh. Aldhy Hatmar(a), Alfa Nelwan(a*), Musbir (a)
(a) Jln. Perintis Kemerdekaan Km 10, Faculty of Marine and fisheries Sciences, Universitas of Hasanuddin, Makassar City, South Sulawesi
Abstract
Tuna (Thunnus Sp.) is one of pelagic fish that has high potential and economic value in Makassar strait. Utilization of this resource is using Handline tuna units, with the number of handline continuously increasing. Therefore, management needs to be done so that optimal productivity can be maintained. This study discusses the estimation of catch and effort at maximum sustainable yield (MSY) of Tuna (yellowfin and Big Eye) based on catch per unit effort (CPUE) and handline production in Majene Regency, West Sulawesi Province during 2007-2022. Mathematical analysis was carried out using the equilibrium approach with the Schaefer model. The highest catch of Tuna reached 143.47 ton in July 2022 (yellowfin tuna reached 84.67 ton and Big Eye Tuna reached 58.8 ton). The average CPUE for tuna was 4.7 tons/unit with CMSY of 1113.99942 tons/year and EMSY of 128 unit/year. From 2014,2015,2019 and 2020, the trend of biomass continued to decline and overfishing occurred during this period.
Keywords: CPUE, MSY, Tuna, Surplus Production Model
