Culling in served females and farrowed sows at consecutive parities in Spanish pig herds

Table 2 By-parity culling risks, farrowing rates and retention rates (%) of first-served female pigs

	Served parity (from service prior to subsequent farrowing)
Measurements	0	1	2	3	4	5	6^b	Total
Number of first-served female pigs	94,691	81,897	72,622	63,909	54,731	44,573	30,733	465,947
Re-served female pigs	11,947	9492	6086	5125	4080	2895	1733	42,442
Culled females without farrowing	5667	4300	3369	3390	3133	3028	2446	27,414
Dead females without farrowing	1272	981	926	911	909	800	598	6889
Re-service risks, %	12.6	11.6	8.4	8.0	7.5	6.5	5.6	9.1
Culling risks for pregnant pigs, %	6.0	5.3	4.6	5.3	5.7	6.8	8.0	29.0
	Farrowed parity (from farrowing prior to subsequent service)
	1	2	3	4	5	6	7	Total
Number of sows farrowed in current parity^a	87,752	76,616	68,327	59,608	50,689	40,745	27,689	431,644
Retention rates, %	92.7	80.9	72.2	63.0	53.5	43.0	29.2	–
Farrowing rates including re-served females, %	92.7	93.6	94.1	93.3	92.6	91.4	90.1	92.6
Culled females without subsequent service	4370	3095	3507	4097	5365	9050	10,809	53,431
Dead female records without subsequent service	1485	899	911	780	751	962	644	6957
Culling risks for farrowed sows, %	5.0	4.0	5.1	6.9	10.6	22.2	39.0	56.4

^aNumber of sows farrowed was calculated as the number of served records subtracted by the number of female pigs that died or were culled before farrowing
^bParity 7 or higher are not shown in Table 2 because these variables are similar to parity 6 sows

ISSN: 2055-5660