Stock assessment of christian crabs (Charybdis feriatus, Linnaeus, 1758) in San Miguel bay
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Abstract
Assessment of the status of swimming crab fisheries in San Miguel Bay with focus on Christian or Crucifix crab, Charybdis feriatus, was undertaken from November 2011 to January 2013. An analytical length-based fish stock assessment was employed using the FISAT (version 1.2.2). A total of 7,679 length frequencies (3,612 C. feriatus and 4,067 Portunus pelagicus) were used in the analysis. About 15 and 14 percent gravid females were harvested monthly for both species that may contribute to recruitment overfishing. Population parameters showed exploitation rate (E) for P. pelagicus and C. feriatus exceeded the optimum exploitation (E0.5) implying excessive fishing effort and heavily exploited stocks. Size at maturity of C. feriatus and P. pelagicus in San Miguel Bay is 8.3 cm and 8.5 cm, respectively. Doable options for resources conservation and management strategies are proposed and supported by local government units (LGUs) including the Integrated Fisheries and Aquatic Resource Management Council.
Suggested Citation
Nieves, P. M., Olfindo, N. R., & Macale, A. M. (2015). Stock assessment of christian crabs (Charybdis feriatus, Linnaeus, 1758) in San Miguel bay. In M. R. R. Romana-Eguia, F. D. Parado-Estepa, N. D. Salayo, & M. J. H. Lebata-Ramos (Eds.), Resource Enhancement and Sustainable Aquaculture Practices in Southeast Asia: Challenges in Responsible Production of Aquatic Species: Proceedings of the International Workshop on Resource Enhancement and Sustainable Aquaculture Practices in Southeast Asia 2014 (RESA) (pp. 121-135). Tigbauan, Iloilo, Philippines: Aquaculture Dept., Southeast Asian Fisheries Development Center.
Subject
mortality 
; sustainable fishing ; resource conservation ; stock assessment ; fishing gear ; Catching methods; check lists ; Catch/effort; sustainability ; catch composition ; growth ; fishery management ; crab fisheries ; marketing ; population structure ; exploitation ; marine crustaceans ; Charybdis feriatus; Stock assessment; San Miguel Bay; Resource conservation and management; Philippines
; sustainable fishing ; resource conservation ; stock assessment ; fishing gear ; Catching methods; check lists ; Catch/effort; sustainability ; catch composition ; growth ; fishery management ; crab fisheries ; marketing ; population structure ; exploitation ; marine crustaceans ; Charybdis feriatus; Stock assessment; San Miguel Bay; Resource conservation and management; Philippines
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