Upaya Peningkatan Produktivitas Budidaya Kepiting Soka dengan Meningkatkan Frekuensi Moulting Melalui Pemberian Daun Murbei

Abstract

Pengembangan budidaya terhadap upaya peningkatan produktivitas kepiting soka atau kepiting cangkang lunak (soft carapace) terus dilakukan dengan berbagai teknik. Penelitian ini bertujuan menganalisis kinerja produksi dan kinerja usaha budidaya kepiting soka melalui peningkatan frekuensi moulting yang diberi penambahan daun murbei pada pakan dengan dosis berbeda dalam sistem apartemen RAS. Penelitian ini menggunakan rancangan acak lengkap (RAL) yang terdiri atas empat perlakuan, yaitu tanpa pemberian daun murbei (kontrol), pemberian daun murbei dengan dosis 30g/kg pakan (DM30), 40g/kg pakan (DM40), dan 50g/kg pakan (DM50). Setiap perlakukan dilakukan tiga kali ulangan dan setiap satu ulangan terdiri dari 10 ekor kepiting bakau yang berukuran 92,50 ± 2,09 g. Daun murbei (Morus alba) sesuai dosis ditambahkan air kapur (Ca2+) dan dihaluskan dengan ikan selar kuning (Selaroides leptolepis) tanpa kepala dan ekor dan selanjutnya dibentuk seperti bakso. Kepiting bakau (Scylla serrata) dipelihara dalam boks apartemen berukuran 30×33×15 cm dengan Resirculated Aquaculture System (RAS) selama 30 hari. Kepiting bakau diberi pakan sesuai perlakuan sebanyak 3-5 % dari biomassa kepiting dengan frekuensi satu kali dalam sehari pada pukul 17.00 WIB. Hasil penelitian menunjukkan DM50 memberikan persentase moulting kepiting bakau tertinggi yaitu 43,33%, tingkat kelangsungan hidup 80% dan produktivitas yang diperoleh lebih baik dari tiga perlakuan lain. Hasil kinerja usaha budidaya kepiting bakau soka terbaik didapatkan pada pemberian daun murbei dosis 50 g/kg dengan R/C ratio 1,56 dengan payback periode 2,19 tahun.

The development of aquaculture towards improving the productivity of mud crab or soft-shelled crab (soft carapace) is continuously being carried out using various techniques. This research aims to analyze the production performance and business performance of mud crab farming by increasing the frequency of moulting with the addition of Morus alba leaves in feed at different doses in a RAS apartment system. This research uses a completely randomized design (CRD) consisting of four treatments, namely without Morus alba leaf supplementation (control), Morus alba leaf supplementation with a dose of 30g/kg feed (DM30), 40g/kg feed (DM40), and 50g/kg feed (DM50). Each treatment was conducted in three replications and each replication consisted of 10 mud crabs with a size of 92.50 ± 2.09 g. Morus alba leaves according to the dose were added with lime water (Ca2+) and ground with yellow scad (Selaroides leptolepis) without the head and tail and then formed into meatballs. Mud crabs (Scylla serrata) were reared in apartment boxes measuring 30×33×15 cm with a Recirculated Aquaculture System (RAS) for 30 days. Mud crabs were fed according to the treatment as much as 3-5% of the crab biomass with a frequency of once a day at 17.00 WIB. The research results showed that DM50 provided the highest percentage of mud crab moulting, which was 43.33%, a survival rate of 80%, and better productivity than the other three treatments. The best mud crab farming business performance was obtained in the dose addition 50 g/kg treatment with an R/C ratio of 1.56 and a payback period of 2.19 years.