Effect of The Addition of Water Lettuce (Pistia stratiotes) Fermented As Plant Protein Source In Java Carp (Osteochilus hasselti) Juvenile Feed.
The research was conducted in Hatchery Faculty of Fisheries and Marine Sciences UNPAD for main observation and in Poultry Nutrition Laboratory Faculty of Animal Husbandry UNPAD for the fermentation process and manufacturing test feed. The research started from March 1st until May 11th, 2013. The research was conducted to determine the optimal percentage of fermented water lettuce leaf meal by Aspergillus niger in artificial feed for growth rate in Java carp juvenile. Fish used was fingerling size of 2.69 ± 0.22 g. Fermentation techniques used were solid substrate fermentation using Aspergillus niger inoculum. This research design used Completely Randomized Design (CRD) with five treatments and three replications. The feed was formulated at the percentage of 0%, 5%, 10%, 15%, and 20%. The main parameters observed were the fermentation product, the specific growth rate and feed efficiency. The results of research showed that the use of water lettuce leaf meal fermented by Aspergillus niger did not significantly affect for specific growth rate and feed efficiency. The use of 15% water lettuce leaf meal fermented was gives the highest value of specific growth rate 1.46% with feed efficiency 24.85%.