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The aim was to evaluate the reproductive performance of the dairy herd. Data were obtained on the farm ZZN Strakonice center Sousedovice from cows culled during 2015. The center treats an average of 250 cows that are kept free of manure and farm milked at four milking robots Lely - Astronaut. The most important reproduction traits were summarized and subsequently statistically processed. Monitored were fertility parameters, milk yield and lifetime production, which were derived from a zootechnical records and monthly reports from milk recording system on 100 dairy cows. With increasing milk yields were deteriorating reproduction parameters such as artificial insemination index, insemination interval and number of days open. For the entire group of cows was monitored milk productivity and reproduction parameters related to parity. The average milk yield in the selected cows was 8579 kg of milk per lactation. With parity increased milk yield per lactation. As well as the average daily milk production and average milk production per day of calving interval. Insemination index and days open length were significantly longer for 2nd lactation where a large increase in milk yield negatively affected these parameters. Furthermore, we evaluated the lifetime milk production. The highest average yield per lactation reached cows cullet later than on 4th lactation. In these cows was detected milk production per lactation for 1000 kg higher than in cows that finished only 2 or 3 lactations. The lowest average yield per lactation was in cows that finished only two lactation. Furthermore, cows were evaluated according to the lactation curve. It was found that with increasing lactation persistence increases milk production but deteriorate the reproduction traits as a days open, insemination interval and insemination index. It was also found that with increasing lactation persistence decreases the longevity. Furthermore, we observed the level of milk productivity according to insemination index and found, that with increasing milk production increase insemination index.

In the thesis we aimed on data connected with slaughter analysis of the body, carcass yield, feed conversion and content of chemicals, including pH of thighs and loin. In the experiment, we used standard nutrias which have been weaned at the second month of age. There were 90 nutrias in the experiment. Nutrias were fed with complete feed mix - made by Kooperace Hrotovice created by CLUS in Prague utility model UV 24096, ad libitum. Nutrias were weighted every 28 days. At the age of 6, 7, and 8 months, 6 females and 6 males were chosen and slaughtered. Results were analysed by variation of analysis, ANOVA method and with age and sex interactions. We have used value P <= 0,05 as statistical significant difference. As a result, we have found out that males grew significantly (P <= 0,05) faster than females. The highest feed conversion was recorded at 4th month of the experiment. Influence of age on the weight of carcass without a head and organs was observed (P <= 0,029), carcass weight of males increased significantly (P <= 0,001). Fat percentage was influenced by both sex (P <= 0,001) and age (P <= 0,001). It loin part weight decreased with growing age (P <= 0,001), and was significant (P <= 0,029).according to sex with lower decreasing in males. For the loin percentage, there was recorded interaction of sex and age (P <= 0,038) and was affected by age (P <= 0,007) and sex (P <= 0,007) as well. Decrease was significantly faster in females. The pH values of loin and thighs were growing with age (P <= 0,001) and were influenced by sex as well, for loin (P <= 0,013) and thighs (P <= 0,016). For proteins we have recorded significant interaction of sex and age (P <= 0,009). Fat content was higher in females (P <= 0,009). Conclusion of the thesis showed, that nutrias can be slaughtered in the age of six months, without a negative on effect meat quality. Males are better in carcass yield, higher protein content and lower fat percentage, in comparison of same age of females.

Objectives of this study were to evaluate effects of milk production level and calving interval, resp. days open period length on the lactation curve parameters and milk production profitability. Data were obtained from Holstein dairy farm. From our results can be stated, that cows with the longest days open period length reached significantly the highest lactation persistence. Due to their ability to maintain high milk productivity after peak day, average daily milk yield was not in these cows, despite long lactation, lower than in cows with shorter lactations. From the economic point of view, milk production profitability with calving interval length decreased and with milk production level increased. Low profitability in cows with long days open period caused high replacement and fertility costs. Feeding costs despite expectations didn´t differ between these groups. All early lactating cows are fed with the same expensive concentrated feeding ration, thats why there is not possible to save feeding costs in high persistent cows with low milk production increase after calving

The aim of this thesis was to compare the reproductive performance of sows on two farms within a selected company, which is engaged in breeding pigs. There were observed phenotypic level of selected reproductive parameters, namely the total number of piglets born, number of piglets born alive and number of weaned piglets. These reproductive performance were also compared depending on the order of litters and the length of pregnancy. The evaluation of the results we can say that the best reproduction performance were achieved in 2014 on a farm A, namely 15,00 pcs of all born piglets per litter. Live born and weaned piglets per litter were found most in 2015 on a farm B, namely 12.56 pcs / litter of live born piglets and weaned piglets - 11.67 pcs / litter. In comparison reproductive performance in the sequence of litter in the number of live born piglets were the best third and subsequent litters on the farm A - 14.66 piglets per litter. The most live born piglets were found in the third and subsequent litters on the farm B - 12.58 piglets per litter. The highest number of weaned piglets were found again in third and subsequent litters, namely 11.64 piglets per litter on the farm B. The evaluation of influence of the length of pregnancy on the reproductive performance is obvious that the best results in all parameters was achieved at a length of pregnancy in the interval from 111 to 113 days. All born piglets per litter were found 15.2 pcs / litter on the farm A and live born piglets per litter were the most on the farm B - 12.55 pcs / litter. The most weaned piglets were found on the farm B - 11,70 pcs / litter. Losses of piglets from birth to weaning were recorded at least on the farm A in 2015 - 5.73% of piglets born alive and on the farm B in 2014 - 6.69%. Depending on the order of litter was the best result achieved at the farm and for sows in the second litter, when losses were recorded only 0.09% of piglets born alive. The best result of losses in relation to the length of pregnancy was achieved on farms A 3.24% at the length of pregnancy in the interval from 117 to 119 days

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