1. Introduction
In 2004, aquaculture activities were 43% of marine resource production worldwide. Shrimp was the most important product economically, being 17% of the global values of fishing products in international trade (FAO, 2007). According to CONAPESCA (2008), production of cultivated shrimp reached 130,200 tons in 2008, 66.33% of aquaculture production in Mexico.