Influences of dietary Eucommia ulmoides extract on growth, flesh quality, antioxidant capacity and collagen-related genes expression in grass carp (Ctenopharyngodon idellus)

The study investigated the effects of dietary Eucommia ulmoides extracts on growth, flesh quality and collagen-related genes expression grass carp (Ctenopharyngodon idella). bark extract (EBE) leaf (ELE) were individually supplemented into basal diet (control) at an inclusion 4 g/kg, then three diets fed to (59.7 ± 0.3 g) for 60 days. results indicated that ELE significantly increased weight gain (+4.22 %), decreased feed conversion ratio (-4.05 %) (P < 0.05), while EBE did not affect growth performance carp. Compared control, apparent digestibility coefficient dry matter, crude protein intestinal digestive enzyme activity contents calcium, total collagen, heat-insoluble collagen free amino acids level (including delicious acids) in also 0.05). In both groups, centrifugal loss, steaming drip loss24h, carbonyl malondialdehyde lower, superoxide dismutase glutathione peroxidase activities higher than control No significant differences amount saturated, monounsaturated polyunsaturated fatty found among but docosapentaenoic acid (DPA), docosahexaenic (DHA), n-3 n-3/n-6 by expression, supplementation promoted type I (COL1A1, COL1A2), proline hydroxylase, lysine oxidasein muscle, matrix metalloproteinase-2 metalloproteinase-9 was conclusion, improved muscle antioxidant capacity