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Performance comparison of selected populations of two breeds of rabitts
POUSTKA, Milan
The aim of the thesis was performance comparison of selected populations of two breeds of rabbits, the Moravian blue (Mm) and the Dutch rabbit (Ho), large and small breed of rabbit in fact. The monitored aspects were the production characters (growth and carcass yield) and reproduction characters (average numbers of birth, number of all births, live born and still-born births and number of weaning rabbits, ability of pregnancy, milkiness). Population of each of the breeds was monitored in a selected base of 68 litters of Moravian blue and 84 litters of Dutch rabbit. Both monitored breeds are recognized by the Czech Breeders Association as bred breeding and club breeding rabbits. Growth was monitored in regular intervals from birth until the end of fattening, i.e. until 8 months of age at Moravian blue a until 6 months of age at Dutch rabbit. The results were compared with the gain in weight published in pattern book of breeds. To evaluate milkiness, each of litters was weighed at 2 and 21 days of age. To compare the reproduction characters the monitored criteria were number of births, total natality and mortality and the number of raised births. The gained values of both breeds were compared and evaluated depending on increment of living mass and the fattening period. Carcass yield was monitored according to the traditional procedure of selected animals of average live weight and after reaching the slaughter age. The results show significantly higher gain in weight throughout the growth period of Dutch rabbit, than required by the pattern book of breeds. Moravian blue showed lower average increase of weight during the first five months of age from standard. The average number of rabbits in litter was 6,3 births at Moravian blue and 6,48 births at Dutch rabbit. On the other hand breeding succest and overall natality gave better results at Moravian blue. It has also been found that the milkiness of Moravian blue was 3985,4 grams in comparison with 2582,2 grams at Dutch rabbit, which is given by the size of breed. The slaughter analysis showed the carcass yield to be 56,1 % at Moravian blue and 62,4 % at Dutch rabbit, which is a value approaching meat breeds but at a lower meat production. The overall summary of the gained results showed greater production of living matter at Moravian blue rabbit providing greater demands for animal housing and feeding base. Its brood provides greater potential for growth and in some aspects better reproduction character. On the other hand, Dutch rabbit reached paradoxically more births in litter and higher carcass yield of undoubtedly better quality meat. Results of this thesis can be beneficial for choosing breed for novice breeders and for existing breeders it can help in their attempts to improve the strengths and eliminate the weaknesses of their breed.
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The level of utility qualities of Chinchilla chinchilla in the chosen breeding
TUROŇOVÁ, Kamila
The main aim of this bachelor work was the analyzing of reproduction of indicators in private breedings. Furthermore, the growth abilities of chinchillas with colour mutations standard, black velvet and milkiness were appraised too. Altogether data were got from 1292 litters of chinchillas wavy color standard mutation from the period 1999 to 2008. Reproduction charakteristics were evaluated in number of born and weaning the youngs, the length of the interim and the size,weaning index of the litter depending on the order of the litter, the year of the monitoring and the membership of the family. The growth abilities of chinchillas colour mutations standard and black velvet were evaluated according to the order of the litters. Data about development of the live weight were made from data of 25 the youngs - standard colour mutation and 23 the youngs - black velvet mutation. Records of weights were taken place in 2009, on the day of the birth of the young and after every week until the young is 49 days. Data were summarized and statistically processed in MS Excel and Statistica Statsoft version 10. The analysis of reproduction characteristics found out on the average 1.82 the youngs born and 1.52 the youngs weaned with the average length of the interim 202.34 days. There were most often two youngs in the litter. The youngs of standard colour mutation evinced bigger average weight than the youngs of colour mutation black velvet.
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