Effect of Padina atraulis extract on growth, feed, carcass composition and fatty acids in Mugil cephalus Linnaeus, 1758

This experiment was conducted to evaluate the effect of Padina astraulis extract on the growth performances of Mugil cephalus in terms of final weight (FW) and daily growth ratio (DGR), feed indices (feed conversion rate) (FCR), voluntary feed intake (VFI), protein efficiency ratio (PER) and lipid efficiency ratio (LER) and body chemical (protein, fat, moisture and ash) and fatty acid composition of Mugil cephalus for 62 days. The experiment was conducted in a completely randomized design with 360 of grey mullet larvae (with average weight of 0.82±0.02g) in 4 treatments and 3 replicates (n=30 in each replicate) and included: control group without using algae extract, an another groups (treatment 2, 3 and 4) the amounts of this extract were 5,10 and 15 g/kg food. The results showed that at the end of experiment, the highest FW (4.22±0.11g), DGI (1.77±0.51%), the lowest FCR (0.95±0.05), the highest VFI (2.81±0.12 %), the highest PER (2.91±0.78), the highest LER (3.66±0.54), the highest crude protein (23.51±0.98%), the highest crude lipid (18.95±0.08%) and the highest poly unsaturated fatty acid (PUFA) including C18:2n-6 (6.51±0.04%), C18:3n-3 (4.81±0.09%) and C20:5n-3 (EPA) (5.21±0.10%) were observed in the diet containing 15 g /kg algae extract in all of these parameters, treatment 4 showed a significant difference compared with control treatment (P