role of dietary inclusion of gracillaria arcuata extract on growth performance and biochemical responses in grey mullet, mugil cephalus (linnaeus, 1758)

The present paper aims to examine the effects of dietary incorporation of gracillaria arcuata extract (ge) on growth conduct and some blood biochemical parameters (cholesterol (cho), triglyceride (tg), total protein (tp) and glucose (glu)) of the grey mullet, mugil cephalus. four experimental regimens were considered by including ge at the concentration of 0, 5, 10 and 15 mg kg^−1diet (ge0, ge5, ge10 and ge15 respectively). each regimen was allocated randomly to three identical groups of fish (n=10 in each tank) with an introductory average weight of roughly 14.95g. upon a 60 day feeding trial, fish fed with ge10 and ge15 diet had a considerable (p<0.05) final weight increase (fw), food intake (vfi), weight gain (wg), protein efficiency ratio (per), lipid efficiency ratio (ler) and specific growth rate (sgr) compared with control group. while, there were no significant difference in fw, wg and ler among fish fed with ge5 diet and fish fed ge0 diet (p>0.05). no considerable difference, in terms of survival rate, was not shown between all of experimental treatments (p>0.05). the highest level of serum total protein was seen in fish on the ge15 diet (p<0.05). fish fed ge10 and ge15 diets had lower glucose, triglyceride and cholesterol concentrations than did fish fed ge0 and ge5 diet (p<0.05). the outcomes implied that dietary inclusion of g. arcuata extract caused positive influences on growth performance, feed utilization and biochemical responses in m. cephalus.