Table 7

Effect of EM and feeding regime on economic efficiency of tilapia juveniles.

Items & Treatments Total cost (L.E) Variable cost (L.E) Production (kg) Net profit (L.E) Total Revenue (L.E) Value added (L.E) Operatin Ratio Return On Costs
Effect of EM on economic efficiency regardless feeding regime
A (0% EM) 27.26 19.24 1.786 11.85 39.28 20.04 0.69 1.44
B (2% EM) 28.25 20.25 1.857 12.46 40.71 20.46 0.69 1.44
C (4% EM) 29.15 21.15 1.973 14.24 43.42 22.27 0.67 1.49
Effect of feeding regime on economic efficiency regardless EM
2/3 of the meal at the morning 28.99 20.97 1.900 12.93 41.92 20.95 0.69 1.45
2/3 of the meal at the afternoon 27.45 19.45 1.840 12.90 40.35 20.90 0.68 1.47
Effect of interaction between EM and feeding regime on economic efficiency
(A1) 28.63 20.58 1.839 11.48 40.45 19.87 0.71 1.41
(A2) 25.90 17.90 1.733 12.22 38.12 20.22 0. 68 1.46
(B1) 29.36 21.36 1.952 13.57 42.94 21.57 0.68 1.46
(B2) 27.15 19.15 1.763 11.34 38.49 19.34 0.70 1.42
(C1) 28.99 20.99 1.925 13.40 42.39 21.40 0.68 1.46
(C2) 29.31 21.31 2.020 15.14 44.46 23.15 0.65 1.52

L.E is the leaver Egyptian.

A1: fish fed a control diet with 2/3 of amount daily meal in the morning, A2: fish fed a control diet with 2/3 of amount daily meal in the afternoon, B1 fish fed dietary 2% EM supplemented with 2/3 of amount daily meal in the morning, B2: fish fed dietary 2% EM supplemented with 2/3 of amount daily meal in the afternoon, C1: fish fed dietary 4% EM supplemented with 2/3 of amount daily meal in the morning and C2: fish fed dietary 4% EM supplemented with 2/3 of amount daily meal in the afternoon.

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