Effect of Addition of Mangrove Extract Sonneratia caseolaris for the Growth of Cantang Grouper (Ephinephelus fuscoguttatus X Ephinephelus lanceolatus)

Abstract

This study aims to evaluate the digestibility of feed and growth of cantang grouper fed artificial feed with the addition of pedada mangrove fruit extract. This research was carried out at the Laboratory of Brackish and Sea Water Cultivation, Faculty of Fisheries, University of Pekalongan. The test fish were cantang grouper with a size of 4-5 cm with a stocking density of 1 fish/L. This study used a completely randomized design (CRD) which consisted of 4 treatments and 3 replications. Treatment A (control) without pedada mangrove fruit extract, treatment B with an extract dose of 5 ml/kg of feed, treatment C with an extract dose of 10 ml/kg of feed and treatment 4 with an extract dose of 15 ml/kg of feed. The results of the study through statistical analysis, administration of papain enzyme extract doses was able to provide a significant effect (P<0.05). Parameters observed were absolute biomass growth, FCR, EPP, SR and water quality. Feeding was done 3 times a day with a maintenance period of 30 days. The results showed that the cantang grouper which was fed with the addition of mangrove fruit extract 15 ml/kg of feed produced the highest average absolute biomass growth in treatment D of 37.98 grams, FCR 1.10, EPP 90.69%. SR 100%. Water quality temperature 28-30 oC, pH 7-8.5, salinity 30-33 ppt and DO 5.4-6.7 ppm. These results indicate that the quality of the water during the study was still within the range of the quality standards. The conclusion from the results of this study was that the addition of pedada mangrove fruit extract at different doses had a very significant effect on growth, feed efficiency and feed conversion rate for cantang grouper with the best dose of 15 ml/kg feed.