Czech Journal of Animal Science, 2006 (vol. 51), issue 2
Effect of breed on growth performance and carcass composition of Aberdeen Angus, Charolais,Herefordand Simmental bulls
L. Bartoň, D. Řehák, V. Teslík, D. Bureš, R. Zahrádková
Czech J. Anim. Sci., 2006, 51(2):47-53 | DOI: 10.17221/3908-CJAS 
Breed effects on live weight gain, slaughter characteristics and carcass composition were compared in Aberdeen Angus, Charolais, Hereford and Simmental bulls. The experiment extended over 2 years and involved totally 96 animals. The target slaughter live weights were determined 550 kg for earlier maturing breeds Aberdeen Angus and Hereford and 630 kg for later maturing breeds Charolais and Simmental. Charolais and Simmental gained more rapidly (P < 0.05) than Aberdeen Angus while Hereford were intermediate. Hereford had lower (P < 0.05) dressing percentage than the other breeds. Percentages of grade I meat were significantly...
Effect of some factors on growth of lambs from crossing between the Improved Wallachian and East Friesian
J. Kuchtík, I. Dobeš
Czech J. Anim. Sci., 2006, 51(2):54-60 | DOI: 10.17221/3909-CJAS
The effect of some factors (genotype, sex, litter size, age of dam at lambing, month of lambing and year of birth of lamb) on the growth of lambs - crossbreds between the Improved Wallachian (IW) and East Friesian (EF) breed was evaluated in operating conditions during two successive years. Three genotypes were evaluated: IW 50 EF 50, EF 75 IW 25 and EF 87.5 IW 12.5. The evaluation of the effect of genotype on growth showed that this factor did not have a significant effect on the majority of growth traits under study. In the period from birth to 100 days of age the highest daily gain was found in IW 50 EF 50 (263 g). The daily gains of EF 75 IW 25...
Effect of long-term storage on induced photon emission of boar spermatozoa
P. Gogol, B. Szczęśniak-Fabiańczyk
Czech J. Anim. Sci., 2006, 51(2):61-65 | DOI: 10.17221/3910-CJAS
Ultraweak photon emission measurements were found to be a useful tool for investigating the influence of stress factors on cells. In the present study, induced photon emission of boar spermatozoa was investigated using a luminometer during a 12-day storage at 15°C in Biosolwens extender. It was shown that the day of storage had a significant effect on some photon emission parameters. During storage, a significant increase in the Integral, Peak max. and Slope max. parameters and a decline in the T.-half (fall) parameter were observed. A significant correlation was observed between photon emission parameters and sperm motility. In conclusion, the results...
Fermentation pattern of the rumen and hindgut inocula of sheep grazing in an area polluted from the non-ferrous metal industry
Z. Váradyová, K. Mihaliková, S. Kišidayová, P. Javorský
Czech J. Anim. Sci., 2006, 51(2):66-72 | DOI: 10.17221/3911-CJAS
In vitro study of the rumen fluid (RF) and hindgut content (HC) fermentation by microbiota taken from sheep grazing in an area atmospherically polluted from the non-ferrous metal industry was conducted and compared with controls from an uncontaminated area (UA). The experimental sheep were exposed to the prolonged intake of heavy metals by grazing in the contaminated area (CA) for one year. Soil and grass from that area and the rumen content of sheep were analyzed for heavy metal levels. Based on the levels of mercury (4.752 mg/kg), copper (232.9 mg/kg), cadmium (1.167 mg/kg), lead (92.509 mg/kg) and arsenic (74.59 mg/kg) the soil was categorized...
The effects of prestorage incubation and length of storage of broiler breeder eggs on hatchability and subsequent growth performance of progeny
M. Petek, S. Dikmen
Czech J. Anim. Sci., 2006, 51(2):73-77 | DOI: 10.17221/3912-CJAS
A total of 1 200 broiler breeder eggs were collected from a commercial flock at the hen age of 37 weeks and divided into storage treatments of 5 and 15 days. Prior to storage, the eggs were further divided into pre-storage incubation (PRESI) 0 (control), 4 and 8 h treatments. Eggs in the 4 and 8 h PRESI treatment were incubated at a standard dry-bulb temperature of 38.0°C. All eggs were weighed prior to and after storage, then incubated in a commercial setter and hatcher for 21 days. After the incubation, all unhatched eggs were opened to determine fertility, hatchability and embryonic death. The 4 and 8 h PRESI treatment significantly decreased hatchability...
Effects of pelleting temperature of phytase supplemented broiler feed on tibia mineralization, calcium and phosphorus content of serum and performance
F. Kirkpinar, H. BASMACIOGLU
Czech J. Anim. Sci., 2006, 51(2):78-84 | DOI: 10.17221/3913-CJAS
The present study was conducted to determine the effects of different pelleting temperature on tibia mineralization, calcium, phosphorus content of serum and growth performance of broilers fed phytase-supplemented diets. The basal experimental diet type was typical maize-soybean meal. The basal diet was supplemented with a microbial 6-phytase (Novo CT: coated thermostable granulate, from Novo Nordisk A/S,Denmark) at 500 Phytase Units (FTU) per kg of feed before pelleting. The diets were pelleted at 65, 75, or 85°C except the basal mash diet as the control. The experimental diets were used from 0 to 6 weeks of age of birds. Dry matter, crude ash, Ca,...
Effect of feeding frequency on growth and size variation in juvenile pikeperch, Sander lucioperca (L.)
Z. Zakęś, A. Kowalska, S. Czerniak, K. Demska-Zakęś
Czech J. Anim. Sci., 2006, 51(2):85-91 | DOI: 10.17221/3914-CJAS
The aim of the investigation was to determine the effect of feeding frequency (one or three rations or continuous feeding with artificial feed) on the juvenile pikeperch (Sander lucioperca) growth rate, intra-group body weight variability and feed utilization. Two experiments were conducted. In the first experiment, the fish (approximate initial body weight 5 g) were fed in excess (5.0-3.5% of stock biomass) while in the second (approximate initial body weight 21 g) a restricted feed ration (1.0-0.8% of stock biomass) was applied. The fish were reared in cylindrical tanks that were a part of the recirculating system. The applied feeding frequencies...