Munguti J M, Waidbacher H, Liti D M, Straif M and Zollitsch W J 2009: Effects of substitution of freshwater shrimp meal (Caridina nilotica Roux) with hydrolyzed feather meal on growth performance and apparent digestibility in Nile tilapia (Oreochromis niloticus L.) under different culture conditions. Livestock Research for Rural Development. Volume 21, Article #129. Retrieved , from http://www.lrrd.org/lrrd21/8/mung21129.htm