THE EFFECT OF GOLDEN SNAIL FEED FOR GROWING THE MUD CRAB Scylla serrata IN THE TRADITIONAL CULTURE POND, CILACAP CENTRAL JAVA

• Main Author: Iskandar
• Format: Theses
• Language: Indonesia
• Subjects: Ilmu hayati ; Biologi
• Online Access: https://digilib.itb.ac.id/gdl/view/35980
• Institution: Institut Teknologi Bandung

The mud crab Scylla serrata is one of aquacultural commodities which highly economic value, both in domestic and overseas market, because of high nutritional contents, such as minerals and omega-3 fatty acid. Most of the farmers used the traditional mud crab cultivation by direct stocking of the crab seeds into the ponds. This method could not be avoided by a high canibalism impact especially when the mud crab in moulting stage, so that eventually causes a low survival rate. A culture method for mud crab by individual tube technique with a limited feeding application (the crabs fed three times in ten days) have more advantages and reduced the mortality rate of mud crabs. For the intensive crab culture it needs a high quality food, and considered cheap in price and higly available in sources, this will support for the sustainable crab production. As an alternative feed for growing the crab Scylla serrata was chosen the golden snail Pomacea canaliculata, because this snail has a high protein content, 51 %. The purpose of this study was to know the effect of golden snail as feed for the mud crab growth in the traditional culture pond, Cilacap Central Java. This study was designed with twelve treatments ie. wet and dried golden snail feed (3%, 5% and 7% feed concentration based on the crab weight); sex: male and female; and with six replications in a sixty days cultural period. The initial sizes of the tested crabs were a range body weight of 35 – 75 gram, length and width of carapace 3,4 – 5,3 cm and 4.7 – 7.5 cm, respectively. Parameters measured in this study were body weight, length and width of carapace, daily growth rate, FCR, survival number, water quality (temperature, salinity, pH, DO, Sechii Disc transparency). The results of this study showed that the highest daily growth rate (1.59±0.75 g/day) was found in treatment of 5 % dry feed, on male, the lowest daily growth rate was 0.68±0.07 g/day found in treatment of 3% dry feed on female. The lowest FCR (0.84:1) was found in treatment of 3% dry feed male. There was not significantly different on survival rate for all treatments. The highst survival rate was 100%. The chemical and physical quality parameters in all treatments were still in a range of good condition for the mud crabs to grow.