Economic rent and optimum allocation of blue swimming crab (Portunus spp.) In Fishery Management Area 712 (Case Study: PPN Karangantu, Banten)

Esza Cahya Dewantara; Muhammad Nur Arkham; Elfando Mada Indranatan; Wilda Retno Palupi

doi:10.15578/aj.v8i1.20343

Economic rent and optimum allocation of blue swimming crab (Portunus spp.) In Fishery Management Area 712 (Case Study: PPN Karangantu, Banten)

Esza Cahya Dewantara, Muhammad Nur Arkham, Elfando Mada Indranatan, Wilda Retno Palupi

Abstract

Blue swimming crab (Portunus spp.) is a high-value demersal fishery commodity in Indonesia, yet increasing fishing pressure threatens its stock sustainability. This study aims to analyze the utilization level, determine optimum effort, and estimate economic rent of blue swimming crab fisheries at Karangantu Fishing Port, Banten within Fisheries Management Area 712. A bioeconomic approach using the Clark-Yoshimoto-Pooley (CYP) algorithm was applied to time-series data from 2015-2024. Results showed Biological parameter estimation yielded intrinsic growth rate (r) = 8.54/year, catchability coefficient (q) = 0.00053, and environmental carrying capacity (K) = 30.94 tons. Bioeconomic analysis revealed that actual conditions (production 86.5 tons, effort 12,283 trips, profit IDR 1,055 million) have exceeded the optimum level. The Maximum Economic Yield (MEY) regime offers the most optimal scenario with production of 58.8 tons, effort of 5,396 trips, biomass of 20.6 tons, and profit of IDR 1,573 million, increasing profit by 49% through 56% effort reduction. Total Allowable Catch (TAC) was set at 52.86 tons (80% of MSY), with quota allocation: set gill nets (45.20 tons), bottom trawls/dogol (3.87 tons), and pots/traps (3.79 tons). Policy recommendations include effort reduction towards 5,000-6,000 trips/year and implementation of input-output controls for sustainable blue swimming crab management in WPP 712.

Keywords

Bioeconomic, blue swimming crab, maximum economic yield, maximum sustainable yield.

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DOI: http://dx.doi.org/10.15578/aj.v8i1.20343