National Repository of Grey Literature 4 records found  Search took 0.00 seconds. 
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.
Problematics of meat sheep breeds
Picurová, Daniela ; Ptáček, Martin (advisor) ; Nohejlová, Lenka (referee)
Bachelor´s degree thesis has been elaborated as a literature review of accessible specialised sources. It dealt with a sum of recent findings concerning the breeding the meat-producing races of the sheep, which is rapidly developing after 1990. Introduction established the structure of sheep races bred in the Czech republic and their classification according to the production performance. The thesis is focused on meat-producing races of the sheep, the most important among them being characterised verbosely. Within the frame of the thesis topic, the performance features were defined. The main part of the thesis dealt with the meat production performance and breed reproduction, which affect the breeding economy. The aim of the thesis was to determine the major factors influencing reproduction and production properties of the breeding material. We have found out, according to specialised literature, that breed, sex, number of lambs per brood and the fattening manner produced the significant effects on the live weight of lambs. The body condition score of mothers had no significant effect in the time of gravidity. The results of the studies indicate that live weight of mothers, age of mothers and lambing season affect significantly the vitality of lambs and their growing disposition consequently the breed economy. Based on the available literature it seems to be an interesting issue early breed ewe lambs, a category that has not been adequately studied. It would therefore be potentially interesting to examine this issue further.
Influences which have effect on the weight of lambs in the age of 100 days of breed texel
STRNAD, Ladislav
The aim of this bachelor thesis was to evaluate chosen influences which have effect on the weight of lambs in the age of 100 days of breed texel. The evaluation was done in 2014 and 283 lambs was include in it. The observed effects were sex, line of ram, the month of birth and litter size of lambs. From the point of view of the influence of sex lambs male achieved the average weight of 33,7 kg in the age of 100 days and female 30,9 kg. From the point of view of the line of ram lambs of line TONDA (38,7 kg) and lambs of line TARTE (34,1 kg) achieved the highest values. The lambs of line TREFLE (30,1 kg) and lambs of line TUTU (30,1 kg) achieved the lowest values. From the point of view of the month of birth the lambs born in June (34,7 kg) and in March (33,1 kg) achieved the highest values. The lambs born in April achieved the lowest values (31 kg). From the point of view of the litter size singles achieved the highest values (34,8 kg). The lambs of triplet achieved the lowest values (29,7 kg). At the observed effects was found that the influence of sex, the month of birth, the line of ram and litter size had an effect on the weight of lambs in the age of 100 days.
The evalution of reproduction parametres in chosen herd of sheep
BENEŠOVÁ, Kristýna
It has been observed the breed herd of Texel sheep in the foothills area of Orlické mountains in the year 2005-2008. The base of herd was consisted of 374 ewes, 575 lambs and 6 rams in total. These parametres of reproduction {--} conception, fertility, rearing, empty ewes, abortions, lambing, stillborn, death after born, were monitored at ewes. For the parametres of reproduction at ewes were found significant effects of ewe´s age and ram´s line.

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