Table 7.

Impact of dietary SDBH inclusion on the economic efficiency of the diets.

	SDBH0	SDBH2.5	SDBH5	SDBH7.5	SDBH10	SEM	Linear Reg.	Quadratic Reg.
TFI (kg/tank)	0.95	0.96	1.01	0.9	0.93	0.01	0.40	0.41
Feed costs (USD)	0.80	0.78	0.80	0.69	0.69	0.02	0.02	0.31
Feed costs/kg gain	1.02 a	0.95 ab	0.94 ab	0.79 bc	0.73 c	0.03	<0.01	0.41

^a,b,c Means with different superscripts in the same row were significantly different (p < 0.05) as the main effect. The regression was considered significant when p < 0.05. The cost of one kg of fish meal was 1.66 USD, and the cost of one kg of SDBH was 0.75 USD. The cost of one kg of diet was 0.83, 0.81, 0.79, 0.76, and 0.74 USD for SDBH0, SDBH2.5, SDBH5, SDBH7.5, and SDBH10 diets, respectively.