Effect of Aphanothece halophytica microalgae on fatty acids and amino acids composition of Artemia urmiana nauplius

The present study was conducted to evaluate the effect of different levels of Aphanothece halophytica microalgae on the fatty acids and amino acids composition of Artemia urmiana nauplius for 3 weeks. Cysts were hatched under identical standard conditions and the experiment was conducted in a completely randomized design with 1200000 of nauplius in 3 trial treatments and 3 replicates (n=100000 in each replicate) included: with 200 mL microalgae with 22 × 106, 16× 106 and 13× 106 cell/mL respectively and control group (1g yeast per 10000 nauplius).The results showed that at the end of experiment, the highest EPA (3.99± 0.25%) and DHA (1.44±0.02 %) was showed in treatments fed with 13× 106 cell/mL. Also, the highest Asp, Gli, Ser, Gly, His, Arg, Thr, Ala, Tyr, Val, Met, Ile, Leu and AA was shown in treatments fed with 13× 106 cell/mL which  showed significant difference compared to other treatments (P<0.05) Overall, the results of the present study revealed that A. urmiana nauplius fed with different levels of A. halophytica microalgae showed better fatty acid and amino acid composition than to control group, and use of 13× 106 cell/mL A. halophytica algae could suggest for A. urmiana nauplius.