Efecto de la edad al servicio en la hembra reemplazo , en los nacidos totales al primer parto de la cerda, en una granja de cría comercial

Abstract

The effect of age at first service in relation to litter size in total born sows in the first parturition and its relationship with the accumulated total number of piglets born up to the fourth cycle were evaluated with a database from a farm. commercial from the north of Antioquia, in Colombia, between January 2016 and October 2021 with 17,756 individual deliveries, corresponding to 4,439 calving females. Individual records were validated prior to analysis by passing them through a tolerance "filter" to remove extreme values from the analysis. The total sow database was classified into 7 classes according to age at first coverage (190-210, 211–230, 231–250, 251–270, 271–290, 291–310 and 311-330 days) and four consecutive deliveries (P1, P2, P3 and P4) The total number of born piglets obtained from each sow during the productive life were higher for gilts served between 211 and 230 days of age in the first service with 13.59 ± 0.09 on average in their first parturition and 54.01 ± 3.16 until her fourth delivery. There was a significant effect (P <0.001) of litter size at the first parity with respect to the cumulative litter size up to the fourth parity. The results indicated that sows mated for the first time at the appropriate age, 221-230 days, are more productive, both in the first parturition and in the rest of their productive life.