In recent years, pig production has experienced a notable increase in productivity, mainly due to changes in management and genetic selection.
Graph 1: Evolution of numerical productivity in the last 25 years. (BDporc data). porciNews magazine (November 2018).
Nowadays, the major swine breeds are more prolific, have smaller weaning-to- estrus interval (WEI), are heavier, with less adipose tissue and reduced appetite.
On the other hand, the objectives of the current pig production are more demanding:
Maximizing the number of piglets weaned/sow/year
Obtaining quality piglets and with the least variation in weight at weaning
Feeding consumption by sows under 40 kg/weaned piglet
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