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Porovnání užitkových vlastností mezi plemeny králíků velký světlý stříbřitý a kalifornský
Sysel, Zdeněk
In the literary part, the bachelor thesis deals with the history of rabbit breed-ing and their quantity in the Czech Republic. It is also mentioned classification of breeds based on their weight and the technology used in small-scale and farm breeding. Next part deal with performance, such as growth rate and car-cass yield. In connection with the performance characteristics, rabbit meat and fur production are characterized. The experimental part describes the comparison of performance character-istics of Californian and Great Light Silver breeds in small-scale breeding. Ob-served animals were weighed regularly from 6 weeks old and slaughtered at 18 weeks old. The Great Light Silver breed achieved better daily growth, on aver-age 35.84 g before weaning and 22.25 g after weaning. The highest growth rates in both breeds were observed in the 7-11 weeks of age. After slaughter, the carcass yield was calculated and the carcasses of both breeds were com-pared again. The average slaughter weight of the California breed was 2262 g and the carcass yield was 54%. The Great Light Silver breed was weighed an average slaughter weight of 2777 g and the carcass yield was calculated to be 56%. The Californian breed excelled in the weight balance of individuals regard-less of gender, the VSS breeds females had better growth ability than males.
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Vyhodnocení kvality králičího masa
Laciná, Monika
This diploma thesis with the topic of evaluation of rabbit meat quality was processed in order to determine the nutritional and technological quality of meat of farmed rabbits in the domestic environment. The rabbits were raised, fed and slaughtered by a breeder. A total of 21 rabbits were selected from 3 litters, which were fed and slaughtered at different times. The experiment was divided according to sex into males and females and further into individual litters 1-3. The following analyzes were performed on the left hind thigh muscle: Water binding, muscle pigments, pH value, collagen proteins, muscle fiber diameter, meat color, dry matter, intramuscular fat, proteins, ashes and fatty acids. All 3 litters were slaughtered between 124-126 days. In the basic parameters (age, slaughter weight, thigh weight, carcass yield, thigh yield, daily gain) there was no statistically significant difference either between sex or between individual litters. The difference (p≤0,05) were observed only in the technological parameters for the color of meat in the value of L * between litter 1 with an average of 66.55 and litter 3 with an average of 60.65. In nutritional indicators, differences were again observed between individual litters. Litter 1 together with litter 2 had lower dry matter and protein compared to litter 3. However, litter 1 had a higher ash compared to litter 3. The most statistically significant differences between litters were determined in fatty acids. There were differences between the content of MUFA, PUFA and in the ratio n6 / n3. The highest content of PUFA was in litter 1 (25,62 %), which was bred and fed during the summer period, the lowest content was in litter 3 (18,92 %), which was bred and fed during the winter period. There were minimal statistically significant differences between male and female. A statistically significant (p≤0,05) difference was found only in the content of γ-linolenic acid, where males had an average value of 0.10% and females 0.06% and in eicosapentaenoic acid. Males had an average acid content of 0.05% and females 0.09%. Based on the results, we can state that we have not demonstrated a significant effect of the sex of rabbits on the quality of meat. This was significantly influenced by the period when the rabbits were fed.
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