Improving Heat Resistance of Nile Tilapia (Oreochromis niloticus) by Dietary Zinc Supplementation

Table 5

The content of copper, iron, manganese, and zinc in the serum, liver, and muscle of Nile tilapia fed on diets with different concentrations (20 or 40 mg zinc/kg feed) and sources of dietary zinc for 45 days.

Parameters	CT	20 ZnSO4	40 ZnSO4	20 Thr-Zn	40 Thr-Zn
Serum
Copper	^b	^b	^b	^ab	^a
Iron	^b	^b	^ab	^b	^a
Manganese
Zinc	^b	^ab	^ab	^ab	^a
Muscle
Copper	^b	^b	^b	^b	^a
Iron
Manganese
Zinc
Liver
Copper	^b	^b	^ab	^ab	^a
Iron
Manganese
Zinc

Different superscript letters indicate significant difference ().