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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Analýza ztrát selat v konkrétním chovu
 Fabiánek, Tomáš
The aim of this thesis was to evalulate reproductive traits of sows in specific farm. All data was collected in period 2017-2021 from sows which are raised by agricultural company GenAgro Říčany a.s. In data there are informations about 3862 litters in total. In sows there was observed gestation length, number of piglets total born, number of liveborn piglets, stillborn piglets, weaned piglets, preweaning mortality in litters and reasons for their elimination. There is evalulation of effect of year, parity and gestation length on these reproductive traits in this thesis also. Statistica and R programs were used to perform this evalulation. Average gestation length for the whole period was 113,92 days. Average number of piglets total born was 15,74. Average number of liveborn piglets was 12,84 and stillborn piglets was 2,89. Average number of weaned piglets was 11,86. Average number of preweaning mortality was 1,78. There was observed significant effect of year, parity and gestation length on reproductive traits in this thesis.
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Rozbor reprodukčních ukazatelů dosahovaných u prasniček a prasnic ve vybraném chovu
 JEŘÁBKOVÁ, Adéla
The aim of this diploma thesis was to analyse the reproductive performance of sows at the particular farm during the time period 2018-2020. The highest number of piglets born alive was observed in 2018 (16.5 pcs; p < 0.05) with the highest rate seen among the sows that have had previously 3-5 litters (17.0; p < 0.05). The highest number of piglets born alive was observed at sows inseminated during the spring season. The average length of pregnancy of the sows during the monitored time period was 116 days. However, the highest number of piglets born alive was reached at sows with the pregnancy length between 110-115 days (16.6 pcs; p < 0.05). Most piglets born alive were born to gilts introduced to the breeding cycle at the age higher than 290 days (15.1 pcs). And lastly, most piglets born alive were born to the sows inseminated by the boar catalogued as #85 (17.1 pcs; p < 0.05). The number of stillborn piglets in 2018 was 2.3 pcs. The number increased to 3.1 pcs in 2019 and slightly decreased in 2020 to 3.0 pcs. The number of litters with 3 and more stillborn piglets was lowest (12%) during the 1st parity then it rapidly grew until it reached its peak during the observed period at the 8th parity (45%).
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