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Fertility and uncertainty
Lupač, Milan ; Melzochová, Jitka (advisor) ; Matějka, Marek (referee)
This paper focuses on effects of economic uncertainty on decision making about childbearing. We had used a regression analysis of unbalanced panel dataset of 27 european countries with maximal lenght of time series of 52 years to determine relationship between fertility and uncertainty. Proxy variables like real GDP per capita, unemployment and their volatilities were used to measure the rate of uncertainty. Volatilities were created by using GARCH and EGARCH models. There was found that real per capita GDP is positively related to fertility and unemployment is related negatively. On the other hand the relationship between volatilities of real per capita GDP and unemployment are positively related to the fertility, but only till the moment when the volatility reaches turning point. Thereafter this relationship turns into negative. Positive relationship on fertility was also found for infant mortality, marriage rate and female labor participation rate. Negative relationship on fertility was found for divorce rate and old dependency ratio.
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Evaluation of the breed of sheep production Merinolandschaf
KRÁLOVÁ, Lucie
The aim of this work is to evaluate the levels of production traits in sheep breed Merinolandschaf. Evaluation of the effect of selected factors on commercial properties in the herd of the breed. This thesis mainly focuses on the effect of age ewes, rams line at impact, influence the frequency of newborn lambs on production indicators. The evaluation of these properties were used data from performance tests and evidence from past years. The thesis should clarify some advantages in breeding should point out shortcomings and problems that occur in the breed while providing solutions to improve the situation in the selected breed. In 2009, the percentage of fertilization to the lowest value of 77.1. The performance tests from 2006 to 2012, we can see that the percentage of fertility by 2010 rising, thanks to the experience breeder. Average intensity of the years 2006 - 2012 was 120.9%. Thanks to the year 2009, the average number of weaned lambs from ewes low number of 107%. Minimum number of weaned lambs in 2009 and to 77.1% and the maximum number was reached in 2010 - 123,4%. Average weight of lambs at birth breed Merinolandschaf for the period was 3.41 kg and 100 days of age 22.55 kg. When comparing fertility ewes depending on their age were detected statistically significant differences at the level p < 0.001 yen sheep aged 5 and 7 year olds. When evaluating the impact of fertility ewes depending on the line of ram, a statistically significant difference at moderate level of p < 0.001 > 0.01 MACEK between lines and between the lines and MESTEK MAGOR and MESTEK. Highest percentage of sheep with singleton was achieved in 2010 and the lowest percent in 2009, while in 2009 it achieved the highest percentage of sheep with twins and multiple litters. Based on the results it can be stated average level of breeding. About this fact testifies above all to achieve reproduction indicators, which were compared with countrywide results.
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Analysis of some of the effects on milk production and fertility of dairy cows in the herd Czech Fleckvieh
TOMAN, Michal
This work occupy with analysis of selected impact milk efficiency and fertility milk cow of herd of czech motley cattle in enterprise Šumavský statek Dlouhá Ves. Main selected impact are genotype, grazing of milk cow, age of first calve, duration of servis period, duration interlude and exterior of milk cow. From result emerge, the biggest impact milk efficiency had age during first calve, Heifer calve in later life had statistical verifiably higher milk yield at first and another lactations. Milk cowswhit lower part of blood of breed czech motley cattle had higher milk yield. In persue years was always reach the biggest milk yield during graze. Durations of servis period and interlude was identical with reached average of Czech Republic. At judge milk cow was find out positive correlational relations between exterior and average daily milk yield only at judge muscle and at judge udder. The enterprise have been anprofitable without provision of subsidy all year long 2012.
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Analysis of selected effects on milk production and fetility in holstein cattle herd
KAUTSKÁ, Jitka
Cattle production plays a very important role in agriculture and economics. It provides key inputs to crop production, but it also forms an integral part of human nutrition. For us the most bred cash breed is Holstein cattle. Its share of the total cow population in the Czech Republic is now 57 percent. The average yield in Holstein cattle in the Czech Republic is 9000 kilograms of milk, making us one of the major EU countries. The aim of my bachelor?s dissertation was to evaluate selected influences on milk yield and fertility in high productive herd of Holstein cattle. Evaluation was hold in ?Agropodnik Košetice, stock company? Chyšná on the farm where is kept 389 Holstein milking cows. On milk cows were monitored indicators such as milk yield in kilograms of milk, lactation, age at first calving, calving month, height in loins, the length of service period and the course of involution of the uterus. From the ascertained results emerge a provable impact sequence from lactation and calving month on milk yield. Milk production in the first lactation was 9 526.97kg, 2nd lactation was 9 727.96kg, 3rd lactation was 10 628.06kg and 4th and other lactations were 11 272.52 kg. In the autumn there was higher milk production at milk cows were calved and the production was 11 163.48kg. The cows calved in summer was yield about 836 kg less. The influence of the length of uterine involution service period was statistically highly significant difference (P ? 0.001) between the healthy group and the group treated within 40 days. The length of a service period was 142.63 days at healthy cows. Cows that treated the longest took about 251 days. As statistically significant (P ? 0.01) was shown the influence of the height of loins at first born calf on milk yield in kilograms of milk. Highest heifers in the herd produced milk at 1 lactation of 10 222.94 kg. Cows with a height in loins up to 142 cm and from 143 cm to 146 cm produced the lactation about 1000 kg lower. Also, the impact of age at first calving and the yield in kilograms of milk on fertility was found to be statistically significant (P ? 0.01). At cows calved at the age of 652-700 days was the longest service period 176.86 days. Cows calved at the age of 751 days had the length of service period 118.67 days. As statistically insignificant was evaluated only the impact sequence of lactation on service period. The results show the importance of herd management, because whichever monitored has impact on affecting the economic efficiency of milk production.
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The performance and fertility of pasture reared Holstein heifers
NEJEDLÁ, Alice
The aim of this thesis was to evaluate the parameters of the milk performance, reproduction indicators and health of Holstein cows that were raised on pasture. The data were obtained from 50 pure bred animals and its crossbreeds which had been grazed and the control group which was represented by 20 heifer which had been reared in stable. The evaluation of parameters was set on the first standardized lactation in the range of 240 to 305 days. The first lactation milk performance traits were: quantity of milk (kg), quantity and content of fat (kg; %), quantity and content of protein (kg; %). The fertility traits were: length of service period (days), insemination interval (days), age at first calving (days).
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Factors affecting the reproductive performance of sows
TŮMOVÁ, Petra
The aim of the bachelor thesis was to analyse reproductive characteristics of sows, that means the fertility and the lactation performance and influences that effect them. This work clarifies internal influences, primarily the breed affiliation, the age and weight of the sows, the parity number and the farrowing index. From external influences are covered nutrition, feeding and technology of stabling. The attention also aims at the pig maternal breeds that are bred for the reproduction characteristics.
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Factors affecting the reproductive characteristics of sows
DULOVCOVÁ, Ivana
The aim of the bachelor theses was to make a review of the issue of sow reproduction and the factors affecting it. The work is focused on fertility of sows. That means the number of total born piglets, number of live born piglets, number of piglets weaned, the age at first mating, farrowing interval and piglet birth weight as well as lactation performance of sows. There were characterized the factors affecting reproductive parameters such as breed affiliation, parity number, nutrition and microclimatic conditions.
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