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Fertility assesment of sows after cervical insemination and intrauterine insemination
BRÁZDOVÁ, Ivana
The objective of the thesis was to analyse the reproductive traits of sows on a particular farm with regard to the method used, as observed during the period of one year. The highest rate of live-born piglets per the first litter (12.4) was reached in nucleus breeding. Regarding the mating method, the highest number of piglets born in the first litter (12.7) was reached through natural mating, followed by intrauterine insemination (12.3) and cervical insemination (11.6). During the one-year period, the rate of successful conception at first service was 83.3 per cent of sows in case of intrauterine insemination, 80.6 per cent of sows in case of natural mating and 79.2 per cent of sows in case of cervical insemination. When calculating the number of all born piglets per 100 inseminations, it was found out that 1 028 piglets were born in case of intrauterine insemination, 1 026 piglets in case of natural mating and only 921 piglets were born in case of cervical insemination, that is 107 (or 105) less. The highest number of born piglets (11.8) was reached in sows serviced when they were 256270 days old, followed by sows serviced when 241255 days old (11.1 piglets). With the gestation length under 114 days, the sows farrowed 1.2 piglets more than when the gestation length was over 115 days. With the weaning-to-conception interval under 5 days, the sows farrowed more (12.4) piglets than with the weaning-to-conception interval lasting over 6 days, which resulted in only 11.9 piglets being born.
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Analysis of influences on reproduction of sows
BRÁZDOVÁ, Ivana
The aim of the bachelor thesis is to analyse the reproductive traits of sows, namely their fertility, the lactation performance as well as the influences that affect them. The reproductive traits are in particular influenced by the animals? breeding affiliation, heterosis, the age and weight of the sow, the litter size and number, the farrowing index, the heritability of the boar, nutrition and the technology of stabling. The thesis deals with these aspects and clarifies them. Furthermore, it provides a description of the pig maternal breeds in which these reproductive traits were monitored, and focuses on controlled reproduction as well.
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