Evaluation of amaranth (Amaranthus caudatus L.) and quinoa (Chenopodium quinoa) protein sources as partial substitutes for fish meal in Litopenaeus vannamei grow-out diets

摘要

Two groups of isonitrogenous diets formulated by replacing 15, 25, 35 and 45 of fish meal protein by amaranth meal and quinoa meal were used to evaluate the performance of Litopenaeus vannamei. Growth showed significant reduction (P0.05) the shrimp growth performance. Shrimp fed with quinoa diets showed better SGR (3.05 day(-1)) than those shrimp fed with amaranth (2.56 day(-1)). No differences in feed conversion ratio appeared in either of the protein sources, but quinoa diets presented a better average (3.13) than amaranth diets (4.01). The apparent digestibility of dry matter and protein for quinoa diets was similar for all diets, but they were statistically different (P<0.05) from the control diet. We conclude that quinoa meal can replace fishmeal up to 45, whereas it can be replaced with amaranth meal up to 15, without adverse effects on growth and survival.