This experiment was performed to determine the suitable quantity of highly unsaturated fatty acids (HUFA) for survival and growth of female broodstock of White leg shrimp (Litopenaeus vannamei) during a 2- months culture period (from Apr 3 to Jun 4, 2008). Brood feed was similar in all treatmints containing and Isonitrogeneous (31.5 % protein): but the only difference between dry diets of the test was varying levels of HUFA (1, 2 and 3%). This research tested the effect of dietary HUFA on the survival ratio (SVR) and the body weight (%WG) and body length (% L), compared to those fed on fresh meals (Prenereis worm, melalis and cuttlefish). The survival ratio didn’t differ significantly between all diets (P>0.05). The (% L) in control diet was significantly higher than other treatments (P<0.05) and then1% HUFA diet was significantly higher. The (%WG) in 1% HUFA diet was significantly higher comared to other treatments (P<0.05).

Keywords: Litopenaeus vannamei, HUFA, growth, Survival

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