Table 7 Carcass characteristics and internal organs (% CCW, unless stated otherwise) of Boschveld roosters fed with diets containing brown seaweed spent oyster mushroom substrate.

²Parameters	¹Experimental diets						³SEM	Significance
²Parameters	CON	SMS0	SMS20	SMS30	SMS40	SMS50	³SEM	P-value	Linear	Quadratic
Slaughter weight (g)	1640.8^a	1653.0^a	1646.4^a	1734.9^b	1762.7^b	1722.2^ab	28.69	0.015	0.017	0.784
HCW (g)	1208.0	1210.0	1197.1	1256.9	1202.9	1234.1	33.16	0.794	0.621	0.972
CCW (g)	1172.7	1173.0	1163.4	1214.5	1179.0	1195.1	31.22	0.873	0.556	0.927
Dressing (%)	73.60	73.23	72.64	72.42	69.96	71.70	1.562	0.630	0.259	0.909
Breast	9.939	8.470	9.193	9.778	9.381	9.856	0.442	0.197	0.020	0.498
Drumstick	7.383	7.635	7.413	7.639	7.600	7.449	0.140	0.626	0.630	0.983
Thigh	6.092	6.412	6.308	6.228	6.414	6.237	0.139	0.570	0.391	0.720
Wing	7.946	7.746	7.917	7.585	8.006	7.817	0.204	0.719	0.719	0.990
Liver	2.053	2.230	2.048	2.088	1.992	2.137	0.066	0.196	0.170	0.075
Gizzard	3.063	3.651	3.744	3.650	3.440	3.609	0.156	0.052	0.444	0.767
Spleen	0.271	0.352	0.231	0.241	0.240	0.282	0.033	0.135	0.117	0.023
Proventriculus	0.456	0.482	0.532	0.504	0.462	0.534	0.022	0.059	0.573	0.921
Duodenum	1.049	1.063	1.083	1.099	1.117	1.120	0.039	0.734	0.201	0.992
Jejunum	1.467	1.577	1.614	1.501	1.503	1.542	0.059	0.527	0.372	0.917
Ileum	1.178	1.256	1.298	1.250	1.359	1.309	0.060	0.397	0.325	0.993
Caecum	0.864^a	1.045^c	1.001^bc	0.901^ab	0.981^abc	0.936^abc	0.033	0.005	0.035	0.368
Small intestines	3.694	3.896	3.995	3.851	3.979	3.972	0.121	0.495	0.682	0.955
Large intestines	0.165	0.149	0.191	0.179	0.151	0.145	0.014	0.166	0.548	0.015

^a,b Means, in a row, with different superscripts denote statistical differences (P < 0.05). ¹Experimental diets: CON = a standard grower diet, SMS0 = CON containing 150 g/kg brown seaweed without oyster mushroom spawn inoculation, SMS20 = CON containing 150 g/kg of brown seaweed substrate after inoculating with 20% oyster mushroom spawn, SMS30 = CON containing 150 g/kg of brown seaweed substrate after inoculating with 30% oyster mushroom spawn, SMS40 = CON containing 150 g/kg of brown seaweed substrate after inoculating with 40% oyster mushroom spawn, and SMS50 = CON containing 150 g/kg of brown seaweed substrate after inoculating with 50% oyster mushroom spawn. ²Parameters: HCW = hot carcass weight, CCW = cold carcass weight. ³SEM = standard error of the mean.

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