[Crab rearing using bamboo fences in Pontianak Regency, West Kalimantan (Indonesia)]
1999
Yanto, H. | Dewantoro, E. | Wibowo, S.S. (Loka Pengkajian Teknologi Pertanian, Pontianak (Indonesia))
Technology assessment on growing crabs in a three-months period using bamboo fences was carried out in Peniti Village, Pontianak District. Local farmers were involved as cooperators. It used a Factorial Completely Randomized Design 2x3 with 3 replications. This assessment used 18 floating cages placed in a brackish water pond. Two level static and dynamic feeding treatments and three different stocking rates of 3, 5, and 7 crabs per square meter were applied. Dynamic feeding dosage was 10 percent of total body weight per day and reduced to 7 and 4 percent both in second and third month, respectively. Static feeding dosage was 7 percent of total body weight per day along the growing period. Parameters that were observed are initial weight, final weight and growth rate. Assessment results showed that stocking rate significantly affected crabs growth rate. In contrast, feeding type not significantly affected crabs growth rate. Also, there is no indication on interaction between stocking rate and feeding type. Combination of stocking rate of 7 crabs/square m and static feeding type showed the highest individual growth rate but provided a low production level. Stocking rate and feeding type also significantly affect on the survival rate. The highest survival rate of 78.89 percent was gained from a combination of stocking rate of 3 crabs/square m and static feeding type. Stocking rates of 5 crabs/square m is economically feasible with a B/C ratio of 1.27
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