Research Article: Population parameters and sex ratio of blue swimming crab (Portunus pelagicus) for its population management in Tiworo Strait waters of Southeast Sulawesi, Indonesia

The objective of this study was to analyze growth and mortality parameters, growth patterns, and sex ratios of blue swimming crabs (BSCs) for the population management policy in Southeast Sulawesi waters. The samples were collected weekly at Pamandati, Bungin Permai, and Kasipute mini plants from July to September ۲۰۲۳. Growth parameters were relatively similar to other tropical waters, but total mortality was high. The exploitation rate (E) was generally low (E< ۰.۵), except in Pamandati (E = ۰.۵۸). BSCs exhibited negative allometric growth (b<۳), with carapace width (CW) contributing >۵۵% to weight (W). Poor environmental conditions of BSC habitat were indicated by a negative condition factor. Efforts to maintain the sustainability of BSCs population while providing high economic and social value suggest that BSCs exploitation can still be increased until reaching E=۰.۵, but BSC females should outnumber males to support reproduction. Juveniles (<۱۰ cm CW) and spawning females should be protected, and mangrove habitats preserved. This study supports and strengthens sustainable BSC management in Indonesia.

کلیدواژه ها:

Growth parameters ، Mortalities ، Portunus pelagicus ، Sex ratio ، Growth patterns ، Condition factors