Replacement of fish meal with co-extruded wet tuna viscera and corn meal in diets for white shrimp (Litopenaeus vannamei Boone)

A feeding trial was conducted to evaluate the potential of replacing fish meal with co‐extruded wet tuna viscera and corn meal in diets for juvenile white shrimp Litopenaeus vannamei. Five practical diets were formulated to contain 30% crude protein and 16.6 kJ g^?1. The feeding experiment was carried out in a recirculating seawater system with fifteen 25‐L tanks with 15 shrimp per tank. Each dietary treatment was fed in triplicate in a completely randomized design for 41 days. Percent weight gain (WG%), survival (S%) and feed conversion ratio (FCR) were calculated, comparisons of these parameters showed no statistical differences (P>0.05) among treatments. The shrimp almost tripled their weight during the feeding trial. Under the experimental conditions S%, WG% and FCR were either improved or were not significantly influenced by the replacement of fish meal with double co‐extruded viscera+corn, except for a slight increase in feed consumption without affecting FCR. Hence, this product can be included by up to 40% in practical shrimp diets without any detrimental effects.