Potential impact of L-threonine and encapsulated butyric acid (ButiPEARL) on growth performance, serum biomarkers, intestinal histomorphometry and economic indices of Nile tilapia fingerlings

Table 4 Effect of different dietary levels of L-threonine and encapsulated butyric acid (ButiPEARL) on growth performance and profitability measures of O. niloticus at the end of the experiment

	G1	G2	G3	G4	G5	G6	MSE	P value
Initial wt (g)	14.6	14.7	15.00	14.83	14.80	14.75	0.243	0.906
Initial length (cm)	6.9	6.9	7.17	6.83	7.20	6.83	0.200	0.649
Total length gain (%)	5.9^d	6.4^cd	7.25^bc	8.17^ab	8.30^ab	8.72^a	0.300	0.000
Total feed intake (g)	44.2	44.2	44.20	44.20	44.20	44.20	0.000	1.000
Total WG (g)	20.40^e	24.58^de	30.72^cd	36.37^bc	41.98^ab	43.28^a	1.697	0.000
Total FCR (%/day)	2.214^a	1.828^b	1.47^c	1.24^cd	1.06^d	1.02^d	0.087	0.000
Total WGR (%)	140.38^d	167.714^cd	205.36^bc	246.38^ab	284.09^a	294.58^a	13.998	0.000
Total SGR (%/day)	2.078^d	2.336^cd	2.65^bc	2.94^ab	3.20^a	3.26^a	0.105	0.000
Kg feedcost (EGP)	10	10.05	10.01	10.06	10.02	10.07	0.000
G feedcost ((EGP)	0.01	0.01	0.01	0.01	0.01	0.01	0.000	0.000
Management cost/1000 (EGP)	100	100	100.00	100.00	100.00	100.00	0.000
TFC/1000 (EGP)	30	30	30.00	30.00	30.00	30.00	0.000
Feed cost /1000 (EGP)	442^f	443.99^c	442.53^e	444.52^b	443.06^d	445.05^a	0.000	0.000
TVC/1000 (EGP)	542	543.99	542.53	544.52	543.06	545.05	0.000
TC/1000 (EG	572	573.99	572.53	574.52	573.06	575.05	0.000
TR/1000 (EGP)	1050.06^d	1178.4^d	1371.55^c	1536.00^bc	1703.40^ab	1740.85^a	47.094	0.000
NP/1000 (EGP)	478.06^d	604.41^d	799.02^c	961.48^bc	1130.34^ab	1165.80^a	47.094	0.000
TVC/1000 ($)	34.63	34.76	34.67	34.79	34.70	34.83	0.000
TFC/1000 ($)	1.92	1.92	1.92	1.92	1.92	1.92	0.000
TC/1000 ($)	36.55	36.68	36.58	36.71	36.62	36.74	0.000
TR/1000 ($)	67.098^d	75.298^d	87.64^c	98.15^bc	108.84^ab	111.24^a	3.009	0.000
NP/1000 ($)	30.548^d	38.622^d	51.06^c	61.44^bc	72.22^ab	74.49^a	3.009	0.000
Feed cost /1000 ($)	28.24^f	28.37^c	28.28^e	28.40^b	28.31^d	28.44^a	0.000	0.000

G1: Control group, G2: Butyric acid 0.3 gm supplemented group, G3: Threonine 0.24 gm supplemented group,G4: Butyric acid 0.3 gm + Threonine 0.24 gm supplemented group, G5: Threonine 0.48 gm supplemented group, G6: Butyric acid 0.3 gm + Threonine 0.48 gm supplemented group, WG: Weight gain, FCR: Feed conversion ratio, WGR: Weight gain ratio, SGR: Specific growth rate, TVC: Total variable cost, TFC: Total fixed cost, TC: Total cost, TR: Total return, NP: Net profit

ISSN: 1746-6148