Vyhodnocení plodnosti prasnic ve vybraném chovu

The goal of the thesis was to analyse the reproductive performance of sows at a selected farm during years of 2011 - 2015. As a main performance indicator we picked a number of live born piglets per sow and litter. Average number of born alive piglets per litter was 12.54. Highest average was reached by Large White breed with 12.70 piglets in a single parity. Highest average over observed period occurred in 2012 with 13.07 live born piglets. Most productive month was May with 12.81 piglets per parity.First parity produced least amount of piglets (11.94), this metric increased until 4th litter to 13.11, and since 5th parity the parity number slowly decreased. Sows with a shorter farrowing interval (under 145 days) exhibited slightly lower fertility than sows with a longer interval (12.64 and 12.75 live born piglets/parity respectively), the difference being 0.11 piglets per sow. Measuring the effect of length of weaning-to-conception interval, sows with interval of 5 or less days produced more live-born piglets per parity (12.69) than sows with interval of 6 and more days (12.55). As for effect of gestation length, sows with shorter gestation (114 days or less) farrowed more piglets (13.10) than sows with longer gestation (115 days and more 12.14 piglets). Examining gilts, the ones mated in earlier age (under 8.3 months) had smaller average litter size of 11.80 piglets vs. 12.29 piglets for gilts mated after 8.3 months. For 92.05 % of observed sows, a single mating was sufficient, and these had higher farrowing rate of 12.55 vs. 12.35 for sows requiring repeated mating