Analysis of Biology and Resource Management of Crab (Portunus pelagicus) in Betahwalang Village

Crab is a fishery commodity with significant economic value and market demand. This encourages an increase in fishing activities, which, without a management strategy, will lead to a decrease in the crab population in the waters. Betahwalang Village is one of the villages in Bonang District, Demak Regency as the center of crab management. The objective of this study was to determine the biological aspects of crabs to determine their growth patterns, as well as the fisheries aspects and management strategies for crab resources (Portunus pelagicus) in Betahwalang Village. The study was carried out from November to December 2023 in Betahwalang Village, Demak Regency. The research method was descriptive. The sampling method was random sampling. The frequency distribution, width and weight relationship, sex ratio, Gonad Maturity Level (TKG), and the size of the first time caught and mature (Lc and Lm) were all considered in the data analysis. The results showed that measurements were taken on 423 crabs. The growth pattern of width and weight was pos/neg allometric. The crab sex ratio was divided into 246 males (58%) and 177 females (42%). The first catch size (Lc) was 114.5 mm.