National Repository of Grey Literature 18 records found  1 - 10next  jump to record: Search took 0.00 seconds. 
Zhodnocení růstu a základních ukazatelů jatečné hodnoty jehňat kříženců plemen romney marsh a clun forest
Minářová, Tereza
The aim of this thesis was to evaluate the growth and basic indicators of carcass value of romney marsh lambs (RM) and crossbreeds of romney marsh and clun forest (CF x RM). The study was carried out in 2019 on the family organic farm in Budeč. The first part of this work is a literature summary that represents problematics of growth and carcass value of lambs. It also deals with the possible effects of various factors on the parameters of growth ability and carcass value of lambs. The next section presents characteristics of the farm and monitored breeds of sheep. The growth was evaluated on the 25 male lambs sample. Live weight was measured at birth, at 70 days, at 100 days and at 130 days. Based on these live weights average daily gain at each interval was calculated. Further, the effect of genotype and interaction of genotype and litter size on live weight and daily gain were evaluated. The genotype had no significant effect on any of the live weights. In terms of average daily gain, the genotype had a significant effect only at some intervals of lamb´s life. Higher live weight at 100 days of age (28.2 kg) and higher daily gain from birth to 100 days (234.9 g) were found out in RM lambs. The effect of the interaction of genotype and litter size was found for most of the monitored live weights and average daily gains. In RM lambs, higher live weight at 100 days (32.0 kg) and higher daily gain in the interval from birth to 100 days (268.4 g) were found in singles. But in CF x RM lambs, these results were higher for twins. For control slaughter 10 male lambs were slaughtered of which 5 of them were RM and 5 of them were CF x RM. As part of the assessment basic indicators of carcass value and the influence of genotype on these indicators, the live weight before slaughter, carcass weight, weight of skin, weight of selected internal organs and right leg weight were determined. Meatiness and fatness were also subjectively evaluated. Slightly better results were found in CF x RM male lambs. In terms of the influence of genotype on carcass value and weight and proportion of viscera, none of the results of the control slaughter were statistically significant.
Zhodnocení růstu jehňat plemene lacaune
Šínová, Jana
The aim of this study was evaluated the growth of lambs Lacaune dairy breed. Monitoring was carried out on the family farm in Brníčko near Zábřeh na Moravě. Altogether, the study includes 168 lambs. The evaluation of growth was determined by live weight of lambs at birth, a tweaning (40 days of age) and 100 days of age. All these live weight was observed average daily gain at intervals of 0 - 40, 40 - 100, 0 - 100 days of age. The growth rate of lambs was evaluated in relation to sex, litter size, maternal age and ram used in reproduction. It was found that maternal age had a highly signifiant effect on birth weight and signifiant effect on live body weight at 100 days of age. Sex lambs had a signifiant effect on all tracked live body weight and average daily gain among birth weight. Litter size had signifiant effect on all tracked live body weights. Line of ram used in reproduction had no signifiant effect on growth or average daily gain of lambs.
Analýza faktorů ovlivňujících reprodukční užitkovost prasnic v podmínkách užitkového chovu
Bezděková, Tereza
The aim of the diploma thesis was to analyse the factors affecting the reproductive performance of sows in the conditions of farming. Self-monitoring of awakening in selected pig breeding, data for evaluation was published in PIGMATIC. The period from 2016 to 2018 was selected for evaluation. Sows were Topigs genotype and boars of BO x PN genotype were embedded. In terms of the reproductive indicators there were evaluated successful insemination and the frequency of piglets, the number of all piglets born, the number of alive and stillborn piglets and the number of piglets weaned. It was evaluated according to the order of the reproduction indicator. Furthermore, an assessment was conducted in accordance with the parity and the specific causes of the elimination. It can be stated from the evaluation of the achieved results that the company has average reproductive performance and the litter order has a significant influence on the litter size. The best reproductive parameters were achieved in 2018, namely 14.7 of all births, 13.3 live births and 11.5 weaned piglets per litter. The stillborn piglets averaged 8.22% in 2016, 9.78% in 2017 and 9.39% of the litter in 2018. In 2016, the number of born piglets in the 4th litter, in 2017 in the 7th litter and in 2018 in the 5th in the year of litter increased in the number of all born piglets. In the case of older sows, the number of piglets born decreased. In evaluating the success of the insemination, it can be said that the best results were achieved in 2016, when 89.5% of the total number of admitted breeders took over. The worst results were achieved in 2017, when 86.2% of the total number of admitted sows were pregnant. Despite this, it means good sowing of sows mainly due to the successful search for rut and proper insemination techniques. The sows in the observed breed were better with young from the 8th litter. Furthermore, it was found that sows and gilts were the worst in the summer months. The highest number of sows was eliminated in 2016 after the first litter, in 2017 after the tenth litter and in 2018 after the eighth litter. The main cause of the decommissioning of breeding was poor health in 2016 and 2017, in 2018 it was old age. Due to old age, sows were eliminated in 2016 from the 8th litter, in 2017 from the 10th litter and in 2018 already from the 7th litter. Other reasons for decommissioning of sows were overrunning, limb defects, low yield, difficult births and abortion. Sows in breeding reach high litters, which indicates very good individual zootechnical care for individual sow.
Analýza morfologických změn spermií kanců a jejich vliv na plodnost prasnic
ŠTVERÁK, Martin
The aim of the work was to evaluate the quality of boar ejaculate in terms of sperm morphology and the influence on fertility of sows. The data came from 58 sperm collections from 8 boars of one line. The boars were housed in the semen collection centre under the same conditions and were in age from 11 to 21 months. In the ejaculate analysis, the evaluation of the pathologically changed sperms was performed by determining the frequency of the finding of individual morphological changes. To evaluate the effect of semen on the litter size, data from 123 successful inseminations and subsequent births were processed. The results showed that boars in most cases produced ejaculate with an average volume with a lower sperm concentration. The incidence of morphologically abnormal sperms was normal for almost all boars. The most common sperm abnormalities were immature sperms and defects of sperm flagella. It was confirmed that more piglets were born after using insemination doses made from sperm ejaculate with the higher sperm count. Furthermore, when using ejaculate with a morphologically abnormal sperm count below 15%, more piglets were born than when the sperm count was 1525%. In the case of immature sperms, a negative correlation with the number of born piglets has been proven.
Analýza stáda a vlivů působících na reprodukční užitkovost prasnic
MUŽÍKOVÁ, Martina
The aim was selected in a commercial breeding (AGRO Vodňany a.s.) to analyze and evaluate herd reproductive performance of sows used for the production of piglets (final hybrids). The analysis was focused on the age structure of the sow, when the first and second litter was 28.8% on the 3rd to 5th litter 23.5% and the sixth and other litters of sows 47.7%.The annual renewal of the herd was culled 22.9% and 25.5% included sows for breeding.This breeding is used natural reproduction, where for the purposes of reproduction bred four boars lines of 48 (White paternity x Pietrain).The average gestation length breeding was 115.2 of days. In 2016, it was born an average of 13.8 piglet per litter, of which 11.5 piglet of live and been preserved was 10.2 piglet per litter.The length of the farrowing interval was 171,1 days and the onset of estrus after weaning piglets was an average of 4.9 days.Weaning is in monitored husbandry carried out between 28 to 31 day age of piglets.Part of this work was to evaluate zoohygiene also at stud and compared with the results of performance farms in the Czech Republic and recommendations for improving the results of husbandry evaluated. When comparing the results of selected indicators identified in Agro Vodňany a.s. with selected data published by the Czech Statistical Office for the South Bohemian Region and the Czech Republic in 2016, it was found that the number of piglets born per sow in the Czech Republic was 30.1 piglets. Piglets was born25.1 in South Bohemia and 24.3piglets was born per sow in Vodňany. The death of piglets from the number of births in the Czech Republic was 10.6% in the South Region accounted for 15.6% and in Vodňany it was 11.9%.The number of surviving piglets per sow in the Czech Republic was 26.9 piglets in South Bohemia have been preserved 21.3 piglet per sow and Vodnany during the reporting period have been preserved 21.4 piglets per sow.
Vlivy působící na hmotnost jehňat ve 100 dnech u plemene texel
STRNAD, Ladislav
The aim of this diploma thesis is to evaluate the chosen influences which effects the weight of lambs in the age of 100 days of breed texel. The evalution was done from 2013 to 2016 and the basic data set is consisted of 1149 lambs. The observed effects were sex, litter size, month of birth, year of birth, mother's age, father's line, and mother's father line. There was found a statistically highly significant difference in the monitoring of sex influence in male lambs (34,69 kg). A statistically significant difference was found in singles (35,14 kg) when evaluating the influence of litter size. There was found a statistically significant differences between the lambs born in May (36,78 kg) and February (37,29 kg), according to the influence of the month of birth. There is also the influence of the year of birth, a statistically highly significant difference was found between 2016 and 2015. There wasn't found a statistically significant difference in the influence of the mother's age. The influence of the father's line proved a statistically highly significant differences in the TAXI line (36,81 kg) and TAYLOR (37,76 kg). The evaluating of the influence of the mother's father line didn´t show a statistically significant difference in the TRISK line (48,50 kg). There wasn´t found a statistically significant difference in interaction of mother's father line and litter size.
Vlivy působící na hmotnost jehňat ve 100 dnech u plemene zwartbles
KVAPILOVÁ, Tereza
The aim of this bachelor thesis was to evaluate the effects of chosen factors (rams effect, litter size and age of the ewes) on the weight of lambs at the age of 100 days of the breed Zwartbles. The evaluation was performed in 2014 and 2015 on the farm in Hranice u Nových Hradů and 263 lambs were included into it in total. From the point of view of the litter size, single lambs achieved the highest average weight of 31.28 kg and the lowest average weight of 24.42 kg was achieved by the lambs of triplets. From the point of view of the age of the ewes, the lowest weight was achieved by the lambs from the seven-year-old ewes (23.07 kg) and from the two-year-old ewes (23.88 kg). The lambs from the three-year-old ewes and the six-year-old ewes achieved the highest average weight (28.14 kg and 29.66 kg). From the point of view of the ram effect, the lowest average weight was found in lambs of the line Zvon (24.05 kg) and the lambs of the line Ztepl achieved the highest average weight (27.22 kg). From the observed effects, it was found out that the litter size and age of the ewes had an effect on the weight of lambs at the age of 100 days, but effect of the ram wasn´t proven.
Estimation of Genetic Parametrs in Selected Reproduction Traits of Sheep and Revision of Existing Evaluation of Animals
Schmidová, Jitka ; Vostrý, Luboš (advisor) ; Jan, Jan (referee)
The objective of this investigation was to select the proper model for genetic parameter estimation, to estimate genetic parameters, and to predict breeding values for litter size in most common sheep breeds in Czech Republic. A total of 143 896 lambing records from 1990 to 2012 were analysed. Variance components and genetic parameters for litter size were estimated separately for each breed using the BLUP animal model with repeatability. The basic model equation contained ewe age as a fixed effect and random effects of contemporary group, permanent environment and direct additive genetic effect of the animal. Modifications of the basic model were examined when various combinations of mating effects were included (contemporary group of ewes during mating (harem), additive genetic and permanent environmental effect of service ram). Estimates of phenotype variance increased across breeds (0.236 for Šumava to 0.779 for Romanov) with increasing breed average for number of lambs per litter. Variance component estimates for permanent environmental effect of the ewe were low (0.0001 to 0.0262). The variance of common environment of contemporary group (from 0.0223 to 0.1309) had bigger influence on the total variability of litter size in almost all studied breeds then additive genetic variance (from 0.0146 to 0.0587). The lowest heritability and repeatability estimates were for the Šumava (h2=0.0619; w2=0.0823) and Romney breeds (h2=0.0626; w2=0.0811); while the highest were for Merinolandschaf (h2=0.1091; w2 = 0.1129). The effect of service ram ranged from 0.01 to 0.02 of phenotypic variance in Šumava sheep, in Romanov sheep it was from 0.05 to 0.10, and in Suffolk sheep it was from 0.04 to 0.05. Including effects of mating (service sire, harem, and/or ram´s permanent environmental effect) in the model decreased deviance information criterion, what means that these models are more proper than the basic one. Results from present study demonstrate that genetic parameters did differ among the investigated breeds, which should be taken into account in breeding value estimation. The service rams have low but a clearly detectable influence on litter size of their mates. Genetic parameter estimates indicate that direct selection on the service ram effect could increase litter size and achieve genetic gain through ram selection.
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.
STUDIUM VLIVŮ PŮSOBÍCÍCH V REPRODUKČNÍM PROCESU U PRASNIC SE ZVLÁŠTNÍM ZŘETELEM K PORODNÍMU OBDOBÍ
ZIMOLOVÁ, Barbora
The aim of the thesis was to reveal reserves for improving the piglets breeding and to reduce losses by death. The highest number of all (13.52 pcs) and live born (11.88 pcs) piglets were achieved in gilts embedded in more than 247 days of age. Gilts covered within 224 days of age showed the lowest average number of piglets born (13.13 pcs). Statistically, however, has not been demonstrated difference (p > 0.05) between age groups of gilts during the first recess in the number of piglets born. Effect of order of litter on litter size was found to be statistically highly significant (p < 0.01), especially between the first and third parturition. The highest number of born piglets was found on the third litter (14.95 pcs) and lowest in the first litter (13.3 pcs). Most live piglets born were at the second litter (14.03 pcs) and least live born piglets were found on the 5th and higher litter (11.57 pcs). Among the number of piglets born alive in the individual litters was also evaluated statistically highly significant difference (p < 0.01). In assessing the impact on the duration of labor litter size was found to be a higher number of piglets born at night on average by 0.33 piglet more, but the number of piglets born alive was found higher in childbirth during the day (childbirth with assist). During statistical evaluation was not demonstrabled difference between the number of all even in the case of piglets born alive in viewpoint of the time of birth. From the perspective of the impact of the length of the interval from weaning to sows on litter size was found to be a higher number of all (14.83 pcs) and live (12.79 pcs) piglets born of sows recessed for more than 6 days after weaning. From the viewpoint of the impact sequence of litter for childbirth was detected statistically detectable difference (p > 0.05). In each of the litters was observed an average of 75 % births through the day. When evaluating the number of live births, depending on the number of piglets, born piglets showed a statistically highly significant relationship (p < 0.01) with high tightness on dependence (R = 0.83). Between the number of all born piglets and born alive was found a direct correlation.

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