Estimation of carcase composition of goat kids from joint dissection and conformation measurements

Figures & data

Table 1. Mean, standard deviation (SD) and coefficient of variation (CV) of SBW, CCW, conformation measurements, joints percentage and carcase composition in tissues (weight and percentage) of half carcase of goat kids (n = 55).

Item	Mean	SD	CV, %
SBW, kg	10.0	1.95	19.4
CCW, kg	4.8	1.10	22.9
Conformation measurements
Chest circumference, cm	48.4	3.51	7.3
Anterior buttock circumference, cm	35.6	3.46	9.7
Posterior buttock circumference, cm	39.3	3.12	7.9
Carcase internal length, cm	44.2	3.60	8.1
Leg length, L, cm	30.0	2.17	7.2
Carcase compactness index, CCW/L, kg·m^−1	10.8	1.81	16.7
Joints
Leg, %	25.1	1.06	4.2
Chump, %	8.3	0.64	7.6
Loin, %	10.5	0.76	7.2
Ribs, %	6.6	0.48	7.2
Anterior rib, %	5.7	0.45	8.0
Shoulder, %	22.6	0.95	4.2
Breast, %	11.6	1.13	9.8
Neck, %	9.7	0.92	9.5
Carcase composition in tissues weight
Muscle, g	1437.0	324.0	22.6
Subcutaneous fat, g	92.7	42.4	45.7
Intermuscular fat, g	197.2	82.5	41.8
Dissected fat, g	289.9	120.7	41.6
Bone, g	463.6	97.2	21.0
Carcase composition in tissues percentage
Muscle, %	64.8	2.79	4.3
Subcutaneous fat, %	4.1	1.15	28.3
Intermuscular fat, %	8.7	2.54	29.0
Dissected fat, %	12.8	3.40	26.6
Bone, %	21.0	1.41	6.7

Table 2. Correlation coefficients (r) between predictors and carcase composition (n = 55).

	Tissue weight, g				Tissue percentage, %
Predictors	M	B	SF	IF	M	B	SF	IF
Cold carcase weight, g	0.98***	0.95***	0.78***	0.70***	0.12^ns	0.40**	0.40**	0.19^ns
Chest circumference, cm	0.93***	0.93***	0.71***	0.68***	0.16^ns	0.34*	0.34*	0.21^ns
Anterior buttock circumference, cm	0.80***	0.77***	0.64***	0.52***	0.07^ns	0.32*	0.36**	0.11^ns
Posterior buttock circumference, cm	0.84***	0.82***	0.62***	0.54***	0.07^ns	0.30*	0.30*	0.12^ns
Carcase internal length, cm	0.83***	0.84***	0.53***	0.56***	0.05^ns	0.21^ns	0.13^ns	0.12^ns
Long leg length, cm	0.92***	0.93***	0.68***	0.65***	0.15^ns	0.28*	0.31*	0.19^ns
Carcase compactness, kg/m^2	0.93***	0.89***	0.79***	0.67***	0.13^ns	0.43**	0.47***	0.20^ns

M: muscle; B: bone; SF: subcutaneous fat; IF: intermuscular fat.

^nsNot significant correlation (p > .05).

* Significant correlation (p < .05).

** Very significant correlation (p < .01).

*** Highly significant correlation (p < .001).

Table 3. Correlation coefficients between carcase tissues (weight and percentage) and the corresponding tissue in the carcase joints (n = 55).

	Carcase joints
Carcase tissues	Leg	Chump	Loin	Ribs	Anterior rib	Shoulder	Breast	Neck
Weight, g
Muscle	0.98***	0.97***	0.96***	0.96***	0.93***	0.98***	0.96***	0.94***
Bone	0.96***	0.85***	0.80***	0.78***	0.85***	0.97***	0.86***	0.76***
Subcutaneous fat	0.87***	0.86***	0.94***	0.72***		0.95***	0.91***	0.35*
Intermuscular fat	0.94***	0.78***	0.93***	0.91***	0.93***	0.95***	0.94***	0.89***
Percentage, %
Muscle	0.80***	0.76***	0.81***	0.68***	0.81***	0.93***	0.89***	0.63***
Bone	0.86***	0.58***	0.59***	0.15 ^ns	0.62***	0.83***	0.69***	0.61***
Subcutaneous fat	0.76***	0.81***	0.88***	0.48***		0.90***	0.78***	0.22 ^ns
Intermuscular fat	0.90***	0.67***	0.92***	0.84***	0.94***	0.93***	0.90***	0.87***

^nsNot significant correlation (p > .05).

* Significant correlation (p < .05).

*** Highly significant correlation (p < .001).

Table 4. Equations for estimation the carcase tissue weights and percentages from carcase weight, carcase measurements and joints tissues dissection.

Dependent variable (y)	Independent variable (x)	r^2	RSD	p	Slope	Intercept
Carcase M, g	Leg M, g	.965	61.43	***	3.77	−17.99
	Shoulder M, g	.963	63.00	***	4.43	−17.57
	CCW, g	.959	66.02	***	0.58	51.28
	Chest circumference, cm	.874	116.29	***	86.19	−2736.3
Carcase B, g	Shoulder B, g	.950	22.05	***	4.12	−0.93
	Leg B, g	.922	27.42	***	3.63	−6.93
	CCW, g	.896	31.71	***	0.17	61.91
	Chest circumference, cm	.864	36.21	***	25.715	−781.46
Carcase SF, g	Shoulder SF, g	.906	13.10	***	3.67	7.34
	Loin SF, g	.875	15.11	***	4.95	30.45
	Breast SF, g	.825	17.88	***	3.99	12.79
	Carcase compactness, kg·m^−1	.630	26.04	***	18.62	−108.41
Carcase IF, g	Shoulder IF, g	.904	25.80	***	4.99	13.66
	Breast IF, g	.889	27.68	***	4.07	13.03
	Leg IF, g	.875	29.47	***	7.49	−2.79
	Chest circumference, cm	.460	61.16	***	15.92	−573.70
Carcase M, %	Shoulder M, %	.865	1.03	***	1.03	−2.69
	Breast M, %	.799	1.26	***	0.54	35.90
	Loin M, %	.661	1.64	***	0.58	22.69
Carcase B, %	Leg B, %	.745	0.72	***	0.81	2.24
	Shoulder B, %	.683	0.80	***	0.81	2.81
	Breast B, %	.481	1.02	***	0.34	13.97
Carcase SF, %	Shoulder SF, %	.815	0.50	***	0.72	0.82
	Loin SF, %	.771	0.56	***	0.45	1.73
	Chump SF, %	.658	0.68	***	0.35	1.62
Carcase IF, %	Anterior rib IF, %	.882	0.88	***	0.49	2.87
	Shoulder IF, %	.858	0.97	***	1.12	0.77
	Loin IF, %	.838	1.03	***	0.84	2.59

r²: Coefficient of determination; M: muscle; B: bone; SF: subcutaneous fat; IF: intermuscular fat; RSD: residual standard deviation.

*** Highly significant correlation (p < .001).