Table 8.

Ultrasound measurements (longissimus and biceps femoris) and carcass characteristics of Bos indicus bulls offered isolipidic diets containing 15%, 10%, 5%, or 0% (DM basis) of WC and 2%, 3%, 4%, or 5% of CSFA as lipid sources^†

Item	Treatments				SEM	P-value
	15WC	10WC	5WC	0WC		0WC vs. WC	L	Q
Ultrasound measurements
REA, cm2
Day 0	48.8	48.5	48.5	48.1	1.62	0.77	0.75	0.97
Day 55	56.6	57.3	58.0	56.8	0.68	0.54	0.69	0.18
Day 103	67.2	67.6	67.6	66.0	0.89	0.16	0.37	0.25
Δ	18.6	19.1	19.1	17.6	0.92	0.20	0.44	0.27
Daily gain	0.181	0.186	0.185	0.171	0.009	0.20	0.44	0.27
Longissimus BFT, mm
Day 0	2.0	2.0	2.0	1.9	0.08	0.70	0.97	0.58
Day 55	3.6	3.9	3.6	3.5	0.16	0.45	0.5	0.32
Day 103	4.9	5.3	4.9	5.1	0.27	0.79	0.76	0.65
Δ	2.9	3.4	3.0	3.2	0.28	0.79	0.76	0.64
Daily gain	0.028	0.033	0.029	0.031	0.003	0.79	0.76	0.64
Biceps femoris BFT, mm
Day 0	2.9	3.0	3.0	3.0	0.11	0.94	0.75	0.41
Day 55	4.9	5.5	5.4	5.6	0.19	0.23	0.04	0.32
Day 103	6.6	7.2	6.7	7.0	0.28	0.57	0.49	0.51
Δ	3.6	4.3	3.8	4.1	0.28	0.59	0.54	0.52
Daily gain	0.035	0.042	0.037	0.040	0.003	0.59	0.54	0.52
Marbling, %
Day 0	2.43	2.52	2.20	2.34	0.15	0.82	0.41	0.88
Day 55	2.94	3.11	3.01	3.25	0.07	< 0.01	0.01	0.63
Day 103	3.06	3.21	3.16	3.35	0.07	0.01	0.01	0.72
Δ	0.70	0.76	0.83	0.98	0.08	0.02	0.01	0.61
Carcass traits
HCW, kg	259.6	260.8	258.0	267.5	9.54	0.48	0.63	0.67
DP, %	54.69	54.28	53.88	54.12	0.31	0.65	0.14	0.30
Carcass ADG, kg	1.05	1.05	1.02	1.00	0.03	0.48	0.40	0.83
YG, %	62.2	61.5	60.4	61.5	0.90	0.87	0.45	0.31

L, linear effect; Q, quadratic effect.

^†Diets were offered for 108 d.