Description: The Practical Training Manual on Doing Aquaculture as a Business for Small and Medium-Scale farmers is composed by two modules: Module 1 The Technical Dimension of Doing Aquaculture as a Business and Module 2 The Economic Dimension of Doing Aquaculture as a Business The target users of both modules are small and medium-scale fish farmers. The purpose of this module is to enhance small and medium-scale fish farmers' knowledge and capacities in understanding and applying the basic technical principles and concepts of doing aquaculture as a business in their daily activities. Module 1 introduces the factors affecting primary productivity, carrying capacity, growth rate and yield in water, the general criteria for classifying the aquaculture systems and the main features of pond and cage based fish farming systems. The concepts of seed production, nutrition and feeds and harvest and post-harvest practices are also introduced. (fao.org)