Journal
AQUACULTURE RESEARCH
Volume 35, Issue 12, Pages 1153-1157Publisher
WILEY
DOI: 10.1111/j.1365-2109.2004.01139.x
Keywords
Litopenaeus vannamei; extrusion processing; fish meal; marine by-products
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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.
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