Effects of tribasic copper chloride on growth, copper status, antioxidant activities, immune responses and intestinal microflora of blunt snout bream (Megalobrama amblycephala) fed practical diets

► Diets with 3-6 mg Cu kg− 1 significantly increased WG and SGR. ► Diets with 9 mg Cu kg− 1 significantly increased feed efficiency. ► Diets with 50-150 mg Cu kg− 1 significantly increased Cu status in tissues. ► Diets with 9-100 mg Cu kg− 1 significantly increased hepatic T-AOC. ► Diets with 100-150 mg Cu kg− 1 significantly increase AKP and ACP.