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Analýza reprodukčních ukazatelů plemene limousine ve vybraném chovu
Neubauerová, Ester
The aim of the bachelor thesis was to evaluate the reproductive indicators of the limousine breed in the selected breeding. For this purpose, monitoring and data collection was carried out in the period of 2021 and 2022. Subsequently, an analysis of selected reproductive indicators was carried out, which mainly included the percentage of conception (%), gross and net birth natality (%). Using the results, it was possible to evaluate the fertilization ability of breeding bulls that were used as part of natural breeding in breeding. In each year, all cows were divided into 3 herds and a breeding bull was then placed in each herd. As part of the monitoring, a lower percentage of pregnancy on average was found in a specific breeding for all monitored cows, namely in 2021 and 2022 (77.8% and 55.3%). This lower conception rate also resulted in a lower percentage of gross and net birth natality (74.1% and 51.8%). However, when looking at specific herds, significant differences can be seen with regard to the breeding bull used. As for the gender representation of calves born, in both years bulls prevailed over heifers.
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Hodnocení plodnosti hřebců a klisen v podmínkách přirozené plemenitby
ZOUBKOVÁ, Lucie
The bachelor's thesis "The Evaluation of fertility in natural service stallions and mares" focuses on the fertility of natural service stallions and mares and the results of breeding thoroughbred horses in the reference period. It analyses all forms of natural service that can be used in the horse breeding, the reproduction of wild horses, advantages and disadvantages of this method and its use in the Czech Republic. The study describes sexual behaviour of horses that is supressed by the modern methods of reproduction, unlike natural service.
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Metody reprodukce využitelné v chovu masného skotu
Střecha, Filip
This thesis entitled "reproduction methods usable in breed of beef cattle" describes the most commonly used reproductive techniques at herds of beef cattle. Breeders implement the bovine reproduction mostly through natural breeding and insemination. The first part of this thesis is devoted to the breeding of bulls, their selection and bonitation. Further, the effect of a bull in a herd is introduced, its classification and the main principles of bull breeding. In the second part the thesis deals insemination. It describes the creation of an insemination dose, its consequent long-term storage and the insemination of cows. The possibilities of influencing the gender and correct timing of insemination are have briefly summarized. The third section introduces the technique of embryo transfer. It describes a stimulation of superovulation, preparation of donors and recipients, flushing of embryos, long-term preservation of embryos and their subsequent transfer. In the fourth section bull catalogues of the Czech Republic, France and Ireland are compared. The individual parts of the cataloques and differences between them are described there. The last part is the assessment of the individual reproductive indicators published in the Czech Republic. The six largest breeds is compared here, and in some consideration beef cattle is compared across all breeds. We evaluates the length of the interim period with respect to the age of a cow, its age at first calving, the percentage of live born of calves and the part of various systems used during ensuring the the reproduction in the herd.
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Reprodukční a biotechnické metody využitelné v chovu dojených plemen skotu
Popelková, Markéta
The bachelor thesis is focused on reproductive and biotechnological methods in dairy cattle breeding. In terms of reproductive methods, it deals with natural breeding, its benefits, negatives, selection, housing and treatment of bulls in natural breeding conditions. As for insemination, it is focused on methods, place of sperm deposition, as well as determining the appropriate time for its execution. Another mentioned biotechnological method is embryo transfer, which concentrates on the correct selection of donors, recipients. Embryos can be either retrieved through lavage or the IVF method. It describes the evaluation of embryos, their transmission and also preservation. Both oestrus and ovulation synchronization and its benefits in reproduction are also mentioned. Ovulation synchronization is addressed in more detail in the synchronization programs such as Ovsynch and Presynch. In case of all these methods, both positive and negative aspects are mentioned. The thesis also concentrates on factors that might influence the functionality of the dairy cow's reproductive organs to some extent.
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Zhodnocení přirozené plemenitby ve stádě krav bez tržní produkce mléka Agrofarmy Dubnice s.r.o.
Šrubařová, Markéta
Abstract This diploma thesis aims to evaluate the natural breeding of cattle that excludes cattle bred for the market production of milk, and the birthing complicatedness in one specific company. The thesis includes short descriptions of the male and female cattle reproductive systems, the pregnancy cycle, and the birth. The most common complications during and after giving birth will be introduced along with a short summary of how to take care of the mother and the calf during the most critical period of their lives. This information is then applied to the circumstances in the chosen company where each birth was recorded with focus on its complicatedness, the size of the calf in relation to the size of the mother, and postnatal complications. The weight gain of selected calves was recorded during two separate weight checks while the data for cows include the age of their first calving and the period of time they have spent in the breeding cycle before the research.
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Možnosti reprodukce zvířat v chovu skotu chovaného v systému bez tržní produkce mléka
Koňariková, Marie
This bachelor thesesis is about options of cattle reproduction on farms without matket dairy production. This work combines literary research, hich first part is about basical principes of reproducton and biotechnical methodes used on farms without matrket dairy production, such as natural reproduction, insemination and other biotechnical methodes combined with them. The second part is dedicated to the description of the most used and most effective methodes of detection rutting cows. Next part is giving informations about methodes of insemination, their application, in connection with sucesfully conception. The part following the insemination desceribes methods of pregnancy diagnostics. And the end, thesis is comparing some herd reproduction factors on farms without market dairy production, based on data from statistical yearbooks.
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HODNOCENÍ PLODNOSTI HŘEBCŮ V PŘIROZENÉ PLEMENITBĚ
ZÁHOROVÁ, Pavla
The aim of the bachelor thesis was to collect information about horse reproduction. It was evaluated the outcome of breeding mares and fertility of stallions at the selected breeding station. It was collected information from literary data about factors that influence fertility. The results of the work illustrate data about fertility of three stallions in season 2018. It was found that the using of stallions is not equal and intensity of using depends on breeder's interest. Frequency of using stallions is determined by intensity of mare's heat. The most intensive use of stallions was in May and June. Mares were breed at one heat three times on average. Success of the breeding was 59% and more. Time of ejaculation was on average 9 seconds and it was ascertained important differences between length of preparation before breeding mare, because stallions have different preferences to specific mare. Stallions used for breeding and sports have higher requirements on feed quantity and quality in order to retain good condition and high fertility. Popularity of stallions is affected by their results in sports in previous seasons.
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Přirozená plemenitba masného skotu na farmách v ČR
Šrubařová, Markéta
The thesis deals with the natural mating of cattle, excluding the market production, with focus on the time period of using a breeding bull and the reasons for their removal from the breeding. The study includes the description of genitalia both male and female, and also the breeding cycle of cows and the ejaculate of bulls. Further on, the study looks into the process of natural breeding, its rules, advantages and disadvantages, and the dates of spring and winter calving. Shortly described is the selection of breeding bulls, their inclusion to the breeding, the time period of their use, the most common reasons for their removal and the options that enable the elimination of those reasons. In conclu-sion, I introduce a real business, which deals with the breeding of cows without market production of milk. The way of breeding is described, and also the factual replacement of bulls in this business, including reasons for their exclusion from breeding.
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Vliv vybraných způsobů reprodukce ve stádě masného skotu na růst telat
HANŽL, Jaromír
The thesis goal was to evaluate the effect of selected breeding methods in Simmental cattle herd on chosen indicators calf birth weight, weight in the age of 120 and 210 days. The thesis deals with the evaluation of differences between sex and the comparison of calving seasons 2014 and 2015 and also shortly focus on the comparison of chosen sires and the evaluation of its effect on selected indicators. Proposal of measures in specific breeding based collected and statistically evaluated data in part of this thesis. As the first, using a linear model, analysed the effect of individual factors which can affect observed indicators was analysed. Afterwards the evaluation of difference between each factors category was done. Within first observed factor which was breeding method was found, that the best results are reached by embryotransfered calves with birth weight 46.81 kg, weight at 120 days 201.11 kg and weight at 210 days 318 kg. The weight at 210 days within artificial insemination group was only 304.33 kg and within natural breeding group 297.68 kg. Furthermore it was found that bulls reach better results in all observed indicators in comparison with heifers. In the light of birth difficultness is important birth weight which was 46.66 kg within group of bulls and 43.45 kg within group of heifers. Weight at 210 days was 321.59 kg, respectively 294.21 kg in case of heifers. It was also found that in 2015 the studied group of calves reached better results than in year 2014 in all observed indicators. Live weight in 210 days was 326 kg and 295.63 kg respectively. The evaluation of observed indicators according to sires showed that a sire significantly affects birth weight; however the effect was not significant on weight at 210 days. The best of compared sires was ZSI 478, birth weight of calves was 48.8 kg.
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Using biotechnological methods in beef cattle herds
ZATLOUKAL, Jakub
The aim of this dissertation consists in analysing the results of the biotechnological techniques (insemination, embryotransfer) for a selected herd of meat-type cattle raised in a foothills countryside dutiny 5 years (2002 {--} 2006) and their comparison with natural breeding. The results this obtained are presented in dependence on the breed, fater{\crq}s origin and calving month. The analysis involves 795 Charolais calves and 450 meat-type Siemental calves. In the Charolais group insemination gave 275 calves, while natural breeding gave 520 calves. In the case of meat-type Siemental group the corresponding numbers are 179 and 271, accordingly. After embryotranfer we have got 4 Charolais calves and 15 calves of the other breed. The work evaluates the influence of the technique of breeding on to the rate of calf grow, with this investigation being performed in dependence on the breed. The meat-type Siemental bulls have shown a significant difference (p {>} 0,05) in the live weight of the calves 120 and 365 days old. In this age bulls born after insemination have been heavier (183,9 kg, 527,9 kg) in comparison with bulls born after natural breeding (172,4 kg, 497,0 kg). Concerming Charolais bulls, no statistically significant difference in the live weight have been found. In addition, no significant influence of the mode of breeding on to the live weight has been found for heifers of both breeds. Concerning the effect of the calving month on the rate of grow, the meat-type Siemntal calves have shown a highly statistically significant (p {>} 0,001) difference in the live weight of calves born in March. The live weights of calves born in March and weighed at 120, 210 and 365 days have been 181,17 kg, 289,2 kg and 510,31 kg, these values being valid for calves after insemination. The corresponding values for natural breeding are lower, particularly 168,26 kg, 271,37 kg and 439,59 kg. In addition a statistically considerable difference (p {>} 0,01) in the live weight has been found for calves 120 days old if the calves were born in April. Insemination has led to a live weight of 194,5 kg, while natural breeding to 168,9 kg. In the group of Charolais calves a statistically significant difference (p {>} 0,01 {--} 0,05) has been found at the age of 365 days. Calves born after insemination had a higher live weight (462,85 kg) as compared to those born after natural breeding (432,85 kg). As concerns the parameters characterising fertility, the following ones have been analysed: the service period (SP), the birth-to-birth interval and the percentage of becoming pregnanat after the first insemination. For the whole period under investigation, the SP value for the Charolais calves (T 100) has been 89,19 days while for the meat-type Siemental calves (S 100) 80,04 days. As concerns the birth-to-birth period found for Charolais (381,32 days) and the meat-type Siemental (390,35 days), it may be stated that these results are satisfactory. The percentage of becoming pregnant after the first insemination has shown a downword trend for both breeds in the course of the years under study. Investigated paramentrs of growth and reproduction are markedly influenced by the breed.
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