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. 2020 Jul 11;6(7):e04400. doi: 10.1016/j.heliyon.2020.e04400

Table 4.

Effect of strain (Ross Cobb) and Sex (Male or Female) on weekly feed conversion ratio (FCR = g:g).

Strain²	Sex	Weekly FCR¹
Strain²	Sex	0–7 d	0–14 d	0–21 d	0–28 d	0–35 d	0–42 d
Ross		1.272	1.229	1.312	1.385	1.445	1.775
Cobb		1.267	1.242	1.330	1.398	1.447	1.801
	Male	1.262	1.223	1.305	1.367	1.406	1.711
	Female	1.277	1.248	1.337	1.416	1.486	1.866
SEM³		0.015	0.010	0.007	0.008	0.007	0.012
Ross Male		1.251	1.211	1.296	1.364	1.407	1.704
Ross Female		1.293	1.247	1.328	1.406	1.484	1.847
Cobb Male		1.273	1.234	1.315	1.370	1.405	1.717
Cobb Female		1.261	1.249	1.346	1.426	1.489	1.885
SEM³		0.022	0.014	0.010	0.012	0.010	0.017
		(Probability > F)

Strain		0.835	0.160	0.009	0.400	0.154	0.073
Sex		0.513	0.068	0.002	0.001	0.001	0.009
Strain x Sex		0.222	0.694	0.117	0.844	0.475	0.646

^ab Means within a column of 3 or more independent variables lacking a common superscript differ significantly (P < 0.05).

¹

Main and interaction effect means calculated using total pen feed consumption (g)/growth (g) = FCR (g:g).

²

Ross 708 and Cobb 500.

³

SEM = Standard error of mean, main effect means of strain and sex calculated using n = 20.