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Vyhodnocení produkčních vlastností ovcí plemene suffolk a charollais v ekologickém chovu
VOSTŘÁKOVÁ, Veronika
The aim of this diploma thesis is to evaluate production characteristics of two breeds of sheep: Suffolk and Charollais. Data for evaluation of characteristics were received from the performance control in years 2016 - 2019. This data were afterwards compared with the nationwide results. This thesis focuses mainly on fertility, fertilization, rearing, number of sheep in reproduction, intensity, evaluation of growth capacity of lambs after birth, death rate of lambs and the difference in number of sheep with single lambs, twins, triplets and quadruplets. In 2016, the average fertilization of the Suffolk breed was 94.1%. In 2016, the percentage of fertilization in the Charollais breed was 97.2%. In comparison with the national results, the average fertilization on the Bočan Farm is higher, in the Suffolk breed by 4.9%. The average fertility per ewed sheep from 2016 - 2019 in the Suffolk breed was 147.4%. The average fertility of the Charollais breed was 159.3% during the observed period. The average intensity in the Suffolk breed was 142.5%. The lowest intensity was in 2016 - 129.4%. The highest intensity of the Charollais breed was reached in 2017 - 164.6%. Another value observed was the weight of lambs after birth and at the 100th day of age. The average weight of Suffolk breed ewes after birth was 2,87 Kg, for rams it was 3,04 Kg. The average weight in the Czech Republic, during the measured period, was 3,1 Kg. The lowest weight of ewes at the 100th day was 28,40 Kg in 2016. The average weight of rams was 30,49 Kg. The lowest weight of Charollais breed ewes after birth was reached in 2019 with value of 2,89 Kg. The highest weight of rams was reached in 2018 with value of 3,27 Kg. The average weight after birth in the Czech Republic is 3,3 Kg. Another parameter monitored was the death of lambs. The most dead lambs in the Suffolk breed were in 2019 - 12 pieces, in the Charollais breed there were the most dead lambs in the year - 2018 - 25 pieces.
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Analysis of reproductive traits in selected sheep breeds
Bubeníčková, Gabriela ; Ptáček, Martin (advisor) ; Ducháček, Jaromír (referee)
The aim of this bachelor's thesis is a literary review and summary of current knowledge of reproduction in selected sheep breeds, namely breeds Romney and Suffolk, definition of the different reproduction indicators and description of the internal and external factors that affect them. Another goal is to make, based on the information gathered, an overall assessment of the reproduction standard of selected sheep breeds of breeders in the Czech Republic.
The period assessed is 2010 - 2014, and the monitored reproduction indicators are: the percentage of fertilization, fertility, strength, rearing and also the birthweight of lambs. Furthermore, the thesis describes the basics of reproduction of Romney and Suffolk sheep and the factors affecting reproduction. For the basis of this thesis were used the documents from the sheep and goats year book. Suffolk breed is the most numerous meat breed in the Czech Republic. The assessment shows that the Suffolk breed achieved better results than Romney breed only in the percentage of fertility. In other indicators breed Romney showed better results. The greatest differences were in percentage of fertilization and fertility. At the percentage of intensity, the results were comparable with the exception of year 2014. The percentage of rearing was significantly better in the Romney breed in the years 2011 and 2014. The results of lambs birthweight did not show big differences; the weight of both breeds was around 3,1 to 3,2 kg. Suffolks have been particularly reared for their outstanding meat yield and therefore do not achieve as good results as the Romney breed, which is thanks to its good reproductive and maternal characteristics used in the maternal position. To improve the percentage of fertilization it would be appropriate to eliminate the number of pregnant ewe in the herds. It is also necessary to ensure high quality and sufficient quantity of feed, to ensure proper animal welfare and selecting proven sheep breeding ram for conceiving.
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