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Kastrace kanečků a minimalizace výskytu kančího pachu
Lujka, Jan
This Bachelor thesis deals with the methods of minimizing the boar taint. Methods of boar castration, advantages and disadvantages of these castration methods are discussed here. There is also written about alternative methods of removing the boar taint, such as fattening boars, sexing sperm cells, nutritive manipulation and the change of breeding technology. The differences in the carcass value of boars, pigs, sows and immunocastrates. We compare the breeding economics depending on gender.
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Úroveň reprodukčních ukazatelů prasnic v užitkovém chovu
Lujka, Jan
The aim of the final thesis was to perform analysis focused on the quality of reproduction parameters of the sows in the utility farming. The observation was focused on the influence of the sow on the reproduction yield and the losses of the piglets, it also observed the influence in the order of the litter and the losses of the piglets, following with the influence of the boar on the reproduction yield and the losses of the piglets and the influence of the boar on the birth weight of the piglets. During the analysis of the influence of the sow on reproduction parameters and the losses of the piglets, three types of sows were compared amongst which no statistically provable differences were found out. During the observation of the influence in the turning of the litter, a statistically provable difference ((P ≤ 0,05) was proved in the number of all the born piglets, that is among the sows in the first litter (14,31 pc/litter) and in the third litter (15,57 pc/litter). Also during the observation of the number of live born piglets in the litter between the sows in the first (13,39 pc/litter) and the second litter (14,47 pc/litter), as well as between the sows in the first (13,39 pc/litter) and the third litter (14,70 pc/litter). Another statistically provable difference (P ≤ 0,05) was noticed during the observation of the number of the weaned piglets between the sows in the first (12,13 pc/litter) and the fourth litter (12,69 pc/litter). During the observation of the piglets´ losses in pieces there was a statistically provable difference (P ≤ 0,05) between the sows in the first litter (1,26 pc/litter) and the third litter (1,71 pc/litter). During the observation of the influence of the boar on the reproduction yield and the losses of the piglets, three boars of various combinations were compared among which no statistically provable differences within the observed parameters were found. In the analysis focused on the influence of the boar on the birth weight of the piglets, the piglets taken after three boars, named A, B and C, were observed. During the evaluation a statistically provable difference was found out (P ≤ 0,05) among the average birth weight of the piglets by the boar A (1,33 kg) and the average birth weight of the piglets by the boar B (1,28 kg), and the average birth weight of the female piglets by the boar A (1,39 kg) and the average birth weight of the female piglets by the boar B (1,23 kg). Another statistically provable difference (P ≤ 0,05) was found out between the birth weight of the female piglets by the boar B (1,23 kg) and the birth weight of the female piglets by the boar C (1,42 kg). Between the values of the average birth weight of the piglets by the boar B (1,28 kg) and the average birth weight of the piglets by the boar C (1,45 kg) a statistically highly provable difference (P ≤ 0,01) was found out. Another statistically highly provable difference (P ≤ 0,01) was also found out between the birth weight of the female piglets by the boar B (1,23 kg) and the birth weight of the male piglets by the boar C (1,48 kg).
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