Table 4 Effect of Tea Tree oil (TTO) dietary supplementation on growth performance and whole-body composition (% fresh weight basis) of O. Niloticus for 60 days

Initial body weight (g)

16.33 ± 0.764

16.57 ± 0.681

15.23 ± 0.681

16.00 ± 1.054

Final body weight (g)

44.17 ± 1.069^c

44.60 ± 0.889^c

47.83 ± 1.595^b

59.80 ± 1.513^a

Weight gain (g)

27.83 ± 0.306^c

28.03 ± 0.503^c

32.60 ± 0.917^b

43.80 ± 0.529^a

Specific growth rate (%)

1.658 ± 0.038^c

1.651 ± 0.046^c

1.907 ± 0.019^b

2.199 ± 0.070^a

Feed intake (g)

46.33 ± 0.764^c

46.63 ± 0.513^c

48.03 ± 0.351^b

53.50 ± 0.500^a

Feed conversion ratio

1.664 ± 0.009^a

1.663 ± 0.024^a

1.474 ± 0.031^b

1.221 ± 0.006^c

moisture

73.42 ± 0.214

73.48 ± 0.161

73.70 ± 0.239

73.36 ± 0.326

C lipid

4.637 ± 0.261^a

4.617 ± 0.202^a

4.233 ± 0.076^b

4.130 ± 0.030^b

C protein

16.47 ± 0.126^b

16.48 ± 0.076^b

16.69 ± 0.320^b

17.11 ± 0.091^a

ASH

5.477 ± 0.078

5.417 ± 0.236

5.377 ± 0.216

5.400 ± 0.315