Effect of methanol extract of gokshura (Tribulus terrestris( on liver and digestive enzymes and blood biochemical parameters in grey mullet, Mugil cephalus Linnaeus 1758

This experiment was conducted to evaluate the effect of methanol extract of gokshura (Tribulus terrestris( (MET) on liver and digestive enzymes and blood biochemical parameters in grey mullet, Mugil cephalus for 60 days. The experiment was conducted in a completely randomized design with 240 grey mullet (with average weight of 8.42±0.43g  and average length of 6.45± 0.40 cm) in 4 treatments and 3 replicates (n=10 in each replicate) and included:  treatment 1 (control), treatment 2 (0.5g MET/kg diet), treatment 3 (1g MET/kg diet) and treatment 4 (1.5g MET/kg diet). At the end of experiment, the lowest cholestrol and triglyceride and and highest albumin of blood serum were observed in treatment 3 and 4 (P< 0.05). The lowest glucose androtein and glubolin  were observed in treatment 4 and there is a significant difference between all of treatments (P< 0.05). The highest the activity of amylase  enzyme and the lowest the activity of asoartat aminotransferase and alanin aminotransferase enzymes were observed in treatment 3 and 4 but there was no significant difference among them (P>0.05). So, finaly the present results showed that use of the diet containing 1.5 g g  the methanol extract o of gokshura /kg had positive effects on the activity of liver and digestive enzymes and blood biochemical parameters of grey mullet.