Exploitation Rate of the Bade-Bade Clam (Isognomon isognomum) in the Waters of Tapulaga Village, Southeast Sulawesi
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The bade-bade clam is a bivalve that plays an ecological role and is utilized by local communities as a food source. One area suitable for the survival of this clam is the waters off Tapulaga Village. This study aims to determine the level of bade-bade clam exploitation based on growth parameters and population mortality rates in the waters of Tapulaga Village, Konawe Regency, conducted from December 2025 to February 2026. The research method employed was manual sampling (hand picking) without size selection in the intertidal zone during low tide. Length frequency distribution data were analyzed using the Sturges formula, while growth parameters were analyzed using the ELEFAN method and the von Bertalanffy growth model. Mortality and exploitation rates were analyzed using the length-converted catch curve method and Pauly’s empirical equation, both accommodated within the FiSAT II version 3.0 program. The total sample of bade-bade clams during the study was 768 individuals. Growth analysis results showed the asymptotic length (L∞), growth coefficient (K), and estimated t0 value for bade-bade clam growth at 152 mm, 1.40, and -0.072, respectively. The results of the mortality analysis showed a natural mortality (M) of 1.46, a fishing mortality (F) of 3.53, and a total mortality (Z) of 4.99. The exploitation rate (E) was 0.71, indicating that the exploitation of bade-bade clams in the waters of Tapulaga Village is classified as (over-exploited).
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