PENGARUH PERBEDAAN SALINITAS TERHADAP MOLTING KEPITING BAKAU (SCYLLA SERRATA): The effect of Salinity Differences on the Molting of Mud Crabs (Scylla serrata)

Tadora Kinanggi (Universitas 45 Mataram)
Aminullah Aminullah (Universitas 45 Mataram)
Ni Kadek Puji Astuti (Universitas 45 Mataram)

Ganec Swara
Vol. 19 No. 3 (2025): September 2025

Mud crab (Scylla serrata) is a high-value fishery commodity with promising aquaculture prospect. Moling (shedding of the shell) is a crucial physiological prosess for crab growth, and its rate is strongly influenced by environmental factors, particulary salinity, whicth plays a role in maintaining the organism’s osmotic balance. This study aimed to determine the effect of different salinity levels on the molting percentage, survival rate (SR), feed conversion ratio (FCR), and absolute weight gain of mud crabs. The research was conducted for 30 days at the Wet Laboratory of the faculty of Fisheries, University 45 Mataram, using a Completely Randomized Design (CRD) with three salinity treatments: P1 (10 ppt), P2 (15 ppt), and P3 (20 ppt), each with four replications. The observed parameters included molting percentage, survival rate, FCR, and absolute weight gain. The results showed that differences in salinity did not have signivicant effecton all obsolute parameters. However, 10 ppt salinity (P1) showed the highest molting percentage of 62.5%, indicating that lower salinity increases the molting percentage in mud crabs. The highest absolute weight gain was also found in the 10 ppt salinity treatment (P1) reaching 18.14 grams, indicating an environment that supports crab growth. However, the highest FCR (6.97) was recorded at 20 ppt salinity (P3).