00000ctm a22000004a 4500 UP-8027390931313576186 Buklod 20070912123154.0 m |o d | ta 070912s1992 xx d r |||| u| (iLib)UPVIS-00000028169 LG 995 1992 F5 K85 Kuntiyo. Fattening of mud crab Scylla serrata Forskal in net cages, installed in the drain canal of intensive prawn ponds fed with trash fish and prawn pellet by Kuntiyo. Iloilo College of Fisheries, University of the Philippines 1992. 60 leaves Thesis (M. S. Fisheries-Aquaculture) - University of the Philippines in the Visayas, April 1992. Body weight increment, feed conversion ratio, survival rate, and economic indicators of fattening make and female mud crabs (Scylla serrate) were studied. Feeding treatments were as follows : I, 2% trash fish ; II, 6% trash fish ; III, 10% trash fish ; and IV, 2% commercial prawn pellet of body weight/day. The crabs were cultured in net cages battery (one crab/cell) installed in the drain canal of intensive prawn ponds for 35 days. Result showed Treatment IV to give the highest weight gain (36.90g for male and 23.10g for female crabs) ; this is comparable to Treatment III. The best feed conversion ratio was realized in Treatment I (1.3 : 1 for male and 1.7 : 1 for female crabs). Survival rate for all treatments ranged from 80 to 100%. Treatments III and IV of male crabs and Treatments II, III and IV of female crabs were considered fat as evidenced by the significantly heavier average weight compared t the average weight crabs of equivalent carapace width in previous study conducted by Varikul (1972). Cost and return computations show treatment III to give the hghest net income (B98.17/1.35m3/year), although all Tretanments (male crabs) were profitable (payback period - 1.57, 2.29, 2.59, and 2.75 years for Treatments III, IV, II and I, respectively. Mud crab. Scylla serrata Forskal. Net cages. UPVIS UPV-CFOS LG995 .1992 F5 K85 UPVIS UPV-GL LG995 .1992 F5 K85 Thesis