عنوان مقاله [English]
The aim of this study was to evaluate the use of seaweed, Jania adhaerens extract (JE) for the first time as dietary additive on the growth performance, feed utilization, body composition and digestive enzymatic activities of grey mullet, Mugil cephalus. Four experimental diets were prepared: JE0 as a control group; JE5, JE10 and JE 15 which included 0, 5, 10 and 15 g JE kg-1 diet respectively. One hundred twenty grey mullet weighting 14.95± 2.01 g (mean± SE) was randomly divided into four groups corresponding to the different feeding regimes. Significant differences (P<0.05) were evident in final weight (FW), weight gain (WG), protein efficiency ratio (PER) and lipid efficiency ratio (LER)) between the control group and treatment. The highest levels for all previous parameters were shown in JE10. Also, the highest crude protein, moisture and amylase, lipase, protease activities the lowest crude lipid were observed in JE15. However no significant difference (P>0.05) were observed in lipase activity, between JE10 and JE15 diet (P>0.05). Overall, the results of the experiment revealed that grey mullet fed with JE10 and JE15 diets showed better growth performance, feed utilization, body composition and digestive enzymatic activities than the control group, and use of diet containing 10 g/kgJ.adhaerens could suggest for grey mullet.