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

Table 3

Effect of different levels (20 or 40 mg zinc/kg feed) and sources of dietary zinc on growth performance and nutrient utilization of Nile tilapia for 45 days.

Item	CT	20 ZnSO4	40 ZnSO4	20 Thr-Zn	40 Thr-Zn
IBW (g)
FBW (g)	^b	^ab	^a	^ab	^a
WG (g)	^b	^ab	^a	^ab	^a
SGR (%/day)	^b	^ab	^a	^ab	^a
FCR	^a	^ab	^b	^ab	^b
PER
Body length (cm)
CF
Survival (%)

IBW: initial body weight; FBM: final body weight; WG: weight gain; SGR: specific growth rate; FCR: feed conversion ratio; PER: protein efficiency ratio; CF: condition factor. Different superscript letters indicate significantly difference ().