Predictors of death and production performance of layer chickens in opened and sealed pens in a tropical savannah environment

Table 1 Descriptive statistics of layer chickens' mortality, egg production and feed consumptions

Pens	Chicken population per house (number)			Mortality in percentages			Egg production percentages			Total feed/layer/day (g)			Total feed/egg laid (g)
Pens	Mean ± SD	Min.	Max.	Mean ± SD	Min.	Max.	Mean ± SD	Min.	Max.	Mean ± SD	Min.	Max.	Mean ± SD	Min.	Max.
House 1	8414 ± 992	6791	10354	0.17 ± 0.25	0	2.07	60 ± 11	25.00	82.13	116 ± 3	105	128	202 ± 50	137	483
House 2	7874 ± 650	4756	9753	0.20 ± 0.27	0	1.83	59 ± 12	25.20	83.90	117 ± 5.7	95	168	210 ± 63	136	593
House 3	7452 ± 1713	5927	11010	0.16 ± 0.23	0	2.03	63 ± 10	30.90	81.20	117 ± 3.5	114	155	195 ± 44	141	396
House 4	7561 ± 2013	5102	11199	0.16 ± 0.19	0	1.27	67 ± 11	31.90	85.50	116 ± 3.2	107	126	180 ± 39	135	376
House 5	6447 ± 1834	2666	9627	0.18 ± 0.28	0	3.03	57 ± 10	28.10	79.30	116 ± 4.1	106	125	215 ± 51	146	434
House 6	12107 ± 602	11090	13429	0.04 ± 0.04	0	0.22	66 ± 10	43.40	86.00	119 ± 14	104	217	183 ± 29	134	277
House 7	14149 ± 625	12670	15200	0.06 ± 0.05	0	0.34	68 ± 17	4.30	89.30	116 ± 8.8	86	166	211 ± 194	132	1970
House 8	11072 ± 1198	7707	12454	0.12 ± 0.13	0	1.03	74 ± 7.0	46.40	86.10	116 ± 3.1	75	121	160 ± 18	95	247
Open houses	7573 ± 1661	2666	11199	0.18 ± 0.24	0	3.03	61 ± 12	25.00	85.50	117 ± 4.0	95	168	200 ± 51	135	593
Sealed houses	12614 ± 1367	9647	15200	0.07 ± 0.08	0	1.03	69 ± 13	4.30	89.30	117 ± 10	75	217	187 ± 123	95	1970
	12614 ± 1367			0.07 ± 0.08			69 ± 13			(NS)			()**
	()*			()*			()*			(NS)			()**

The total sample population was 83,033 layer chickens. All birds in each house were included for analysis. (***) Significant at P≤ 0.001; (**) Significant at P≤ 0.005; (NS) = Not significant.
Bold data in Table 1 indicated combined data for all open and closed houses.

ISSN: 1746-6148