Table 3.

Effect of animal species and feedlot period on growth performance and carcass tissue composition

Item	Species		Days in feedlot			SEM	P value1
	Goat	Sheep	28	56	84		Species	DF	S × DF
Performance2 (kg)
Final BW	27.44	31.43	23.75	29.75	34.81	1.40	<0.01	<0.01	0.20
Weight total gain	7.74	11.73	4.05	10.05	15.11	1.23	<0.01	<0.01	0.20
ADG	0.10	0.16	0.09	0.14	0.16	0.01	<0.01	<0.01	0.34
HCW	12.87	14.55	11.05	13.25	16.83	0.71	0.01	<0.01	0.62
CCW3	12.78	14.47	10.98	13.26	16.64	0.70	0.01	<0.01	0.58
Weight of tissue (kg)4
Muscle	7.74	8.08	7.08	7.81	8.83	0.37	0.60	0.10	0.28
Fat	1.15	2.51	1.23	1.69	2.57	0.21	<0.01	<0.01	<0.01
Bone	2.62	2.68	2.20	2.64	3.11	0.11	0.64	<0.01	0.44
Tissue ratio
Muscle:bone	2.82	3.04	2.94	2.95	2.90	0.10	0.13	0.94	0.43
Fat:bone	0.43	0.91	0.55	0.63	0.83	0.03	<0.01	<0.01	<0.01
Fat:muscle	0.16	0.30	0.19	0.21	0.28	0.007	<0.01	<0.01	<0.01
Weight of tissue (% CCW)5
Muscle	66.14	61.43	65.49	64.49	61.38	0.73	<0.01	<0.01	0.92
Fat	10.27	18.19	12.09	13.64	16.95	0.98	<0.01	<0.01	<0.01
Bone	23.58	20.36	22.40	21.85	21.66	0.52	<0.01	0.76	0.27

¹DF = days in feedlot; S × DF = interaction between animal species and days in feedlot.

²Final BW: linear effect: P < 0.01 and quadratic effect: P = 0.64; weight total gain: linear effect: P < 0.01 and quadratic effect: P = 0.64; ADG: linear effect: P < 0.01 and quadratic effect: P = 0.27; HCW: linear effect: P < 0.01 and quadratic effect: P = 0.29; CCW: linear effect: P < 0.01 and quadratic effect: P = 0.37.

³CCW = cold carcass weight.

⁴Bone: linear effect: P < 0.01 and quadratic effect: P = 0.85.

⁵Muscle: linear effect: P < 0.01 and quadratic effect: P = 0.70.