Molting mud crab (Scylla serrata) in the mangrove ecosystem service

Abstract

Mud crabs (Scylla serrata) are one of the coastal fisheries commodities, especially in mangrove forests. This study was proposed to determine mangrove ecosystems service to produce molting of mud crab (S. serrata). This research on mangrove crab molting using a completely randomized design with four levels of treatment, namely ablation, autotomy, ablation + autotomy and control with three replications. The highest growth rate was ablation (molting percentage 80.95%, and 100% survival, growth 12.51%/day) and lowest ablation + autotomy (growth 4.95%/day, molting percentage 19.05%, growth 4.95% of the day). The differences in molting stimulation affect the percentage of molting.

Mangrove ecosystem in North Sumatran (Indonesia) forests serves as a suitable habitat for mud crabs (Scylla serrata and S. olivacea)

“…To find out the calculation of the economic potential value of mud crabs, each mud crab found in the measurement plot was weighed to determine the weight and category (Figure 2), because the weight and category of mud crabs determine the price at which the fishermen will sell them to the nearest agent (Basyuni et al 2020). In Lubuk Kertang village, there are six categories of mangrove crabs that are commonly traded: pete (weight 30-50 gr, price IDR 18000/kg for nursery purposes), ceka/ashoka crab category (weight 80-100 gr, price IDR 35000/kg for sales purposes until the shell becomes hard), category A1 (weight 100-350 gr, price IDR 65000/kg), category AA (weight 350-500 gr, price IDR 80000/kg), category A Super (weight 500-1000 gr, price IDR 115000/kg), and female crabs laying eggs (weight 250 gr, price IDR 90000-150000).…”

“…The condition index reflects the interaction between biotic and abiotic factors that influence physiological processes in fish (Rahman et al 2012). According to Fatihah et al (2017), the growth rate of carapace length of mangrove crabs is determined by natural activities such as the molting process (Basyuni et al 2020). Fishermen that work as mud crab catchers (Scylla sp.)…”

“…Fishermen and crab aquaculture owners recommend that the government pay attention to this sector to prevent overexploitation of these species and environmental damage affecting their habitats. Fishermen are becoming increasingly interested in farming mud crabs (Basyuni et al 2020;Bir et al 2020).…”

“…According to Tetelepta et al (2020), the high demand for mud crab, both in the village of Lubuk Kertang and elsewhere, has a significant impact on the natural population of mud crabs. It has been reported that molting mud crab has been developed in Lubuk Kertang as a mangrove ecosystem service (Basyuni et al 2020). Mud crabs were also cultivated for many years in Asia, mainly based on the capture and fattening of juveniles from the wild, particularly in Southeast Asia where production is rapidly increasing (Petersen et al 2013;Hungria et al 2017).…”

Effects of Temperature and Diurnal Cycle in the Molting Schedule of Mangrove Crab, Scylla serrata (Forskål, 1775)

“…Soft-shell crabs are among the top emerging fishery products with huge export potential (Basyuni et al 2020). Soft-shelled crabs are referred to as "luno" in the local dialect, which means newly molted with a soft body or shell.…”