Feeding Difference Concoction of Plant Extracts on The Growth and Molting of Crabs (Scylla serrata) Culture in Silvofishery Pond
Esti Handayani Hardi (a*), Andre Julpano (a), Wanda (a), Ismail F. Almadi (b), Harris Retno (c), Rita Diana (d), Nurul P. Palupi (e), Gina Saptiani (a), Andi N. Asikin (f), A. Syafei Sidik (b)

a) Microbiology and Biotechnology aquaculture Laboratory, Aquaculture Department, Faculty of Fisheries and Marine Science, Mulawarman University.
*estie_hardie[at]fpik.unmul.ac.id
b) Basic Chemical Laboratory, Aquaculture Department, Faculty of Fisheries and Marine Science, Mulawarman University.
c) Faculty of Law, Mulawarman University, Samarinda, East Kalimantan, Indonesia
d) Faculty of Forestry, Mulawarman University, Samarinda, East Kalimantan, Indonesia
e) Faculty of Agriculture, Mulawarman University, Samarinda, East Kalimantan, Indonesia
f) THP Laboratory, Faculty of Fisheries and Marine Science, Mulawarman University.

Abstract

The purpose of this study was to investigate the effect of some extracts mixed as functional feed additives on crab growth and molting activity (Scylla serrata). There were 50 crabs used in the study, with 10 crabs for each treatment dose. The crabs are kept individually in a crab box floating on a plastic parallon. The treatments tested were divided into five groups: one without extract and four groups with 400mg/L Solanum ferox (SFE), 200 mg/L Zingiber zerumbet (ZZE), and 600 mg/L Boesenbergia pandurate (BPE). 1) Crabs without extracts, 2) 20 mg/kg BPE and SFE feed in a 1:1 ratio, 3) 30 mg/kg BPE and SFE feed in a 1:1 ratio, 4) 20 mg/kg feed of ZZE and SFE with 1:1 ratio, and 5) 30 mg/kg feed of ZZE and SFE with 1:1 ratio. Crabs feeding was fresh fish (Sardinella sp.) with the protein content of 26-30%, was given at a dose of 5% body weight every day. The findings revealed that the dosage of herbal extracts affects crab feed utilization and growth performance. The dose of herbal extract concoction in group 5 resulted in higher feed utilization and growth performance, but crabs molting were more visible in group 3. Feed utilization and growth performance of mud crabs after molting and non-molting were found to differ significantly. SGR of 2.73 percent was obtained in group 3. In Group 3, 86 percent of crabs were molting, and 86,7 percent of crabs survived. There were also significant differences between treatments for specific growth rates, feed consumption, feed efficiency, and condition factors. These findings indicate that concoction ZZE and SFE herbal extracts could be used as feed additives to improve feed utilization and growth performance, and BPE and SFE can also stimulate molting in crab farming.

Keywords: Crab, Growth, Plant extracts, Molting, Feed Utilization

Topic: Budidaya Perairan Berkelanjutan (National)