Template-Type: ReDIF-Article 1.0 Author-Name: L. Bartoň Author-Workplace-Name: Research Institute of Animal Production, Prague-Uhříněves, Czech Republic Author-Name: D. Řehák Author-Workplace-Name: Research Institute of Animal Production, Prague-Uhříněves, Czech Republic Author-Name: V. Teslík Author-Workplace-Name: Research Institute of Animal Production, Prague-Uhříněves, Czech Republic Author-Name: D. Bureš Author-Workplace-Name: Research Institute of Animal Production, Prague-Uhříněves, Czech Republic Author-Name: R. Zahrádková Author-Workplace-Name: Research Institute of Animal Production, Prague-Uhříněves, Czech Republic Title: Effect of breed on growth performance and carcass composition of Aberdeen Angus, Charolais,Herefordand Simmental bulls Abstract: 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 higher (P < 0.05) in Charolais and Simmental. The highest percentage of separable fat was recorded in Hereford (P < 0.05). Charolais and Simmental had lower (P < 0.05) thickness of subcutaneous fat over MLLT than Aberdeen Angus andHereford. The later maturing bulls generally tended to achieve higher live weight gains during the experiment, produced less fat and had higher percentage of meat from high priced joints in comparison with earlier maturing animals. Keywords: beef cattle, bulls, breeds, growth, carcass composition Journal: Czech Journal of Animal Science Pages: 47-53 Volume: 51 Issue: 2 Year: 2006 DOI: 10.17221/3908-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/3908-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200602-0001.txt Handle: RePEc:caa:jnlcjs:v:51:y:2006:i:2:id:3908-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: J. Kuchtík Author-Workplace-Name: Department of Animal Breeding, Mendel University of Agriculture and Forestry, Brno, Czech Republic Author-Name: I. Dobeš Author-Workplace-Name: Department of Animal Breeding, Mendel University of Agriculture and Forestry, Brno, Czech Republic Title: Effect of some factors on growth of lambs from crossing between the Improved Wallachian and East Friesian Abstract: 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 and EF 87.5 IW 12.5 in this period were lower but identical (244 g). Age of dam had a significant effect on the majority of growth traits under study. Sex of lamb had a significant effect on body weight at 100 days of age and also on the majority of daily gains under study. The factors litter size, month of lambing and year of lamb birth were the most significant sources of variation of daily gains. As far as the non-genetic factors were concerned, the highest daily gains from birth to 100 days of age were recorded in males (259 g), in singles (260 g), in lambs from 4-years-old ewes (269 g), in lambs born in January (263 g) and in lambs born in the first year of evaluation (256 g). The analysis of phenotypic correlations indicated that body weight at birth showed a positive and highly significant (P ≤ 0.01) effect on the majority of growth traits under study. All phenotypic correlations between individual body weights were positive and high (P ≤ 0.01). The majority of phenotypic correlations between individual daily gains under study were also positive and high (P ≤ 0.01). Keywords: lamb, growth traits, Improved Wallachian, East Friesian Journal: Czech Journal of Animal Science Pages: 54-60 Volume: 51 Issue: 2 Year: 2006 DOI: 10.17221/3909-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/3909-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200602-0002.txt Handle: RePEc:caa:jnlcjs:v:51:y:2006:i:2:id:3909-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: P. Gogol Author-Workplace-Name: Department of Biotechnology of Animal Reproduction, National Research Institute of Animal Production, Balice/Kraków, Poland Author-Name: B. Szczęśniak-Fabiańczyk Author-Workplace-Name: Department of Biotechnology of Animal Reproduction, National Research Institute of Animal Production, Balice/Kraków, Poland Title: Effect of long-term storage on induced photon emission of boar spermatozoa Abstract: 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 of the present study indicate that the measurement of induced photon emission can be an alternative, sensitive and relatively simple method for assessing the effect of preservation on oxidative damage to boar spermatozoa. Keywords: boar semen, oxidative stress, luminescence, photon emission, sperm motility Journal: Czech Journal of Animal Science Pages: 61-65 Volume: 51 Issue: 2 Year: 2006 DOI: 10.17221/3910-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/3910-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200602-0003.txt Handle: RePEc:caa:jnlcjs:v:51:y:2006:i:2:id:3910-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: Z. Váradyová Author-Workplace-Name: Institute of Animal Physiology, Slovak Academy of Sciences, Košice, Slovak Republic Author-Name: K. Mihaliková Author-Workplace-Name: Institute of Animal Physiology, Slovak Academy of Sciences, Košice, Slovak Republic Author-Name: S. Kišidayová Author-Workplace-Name: Institute of Animal Physiology, Slovak Academy of Sciences, Košice, Slovak Republic Author-Name: P. Javorský Author-Workplace-Name: Institute of Animal Physiology, Slovak Academy of Sciences, Košice, Slovak Republic Title: Fermentation pattern of the rumen and hindgut inocula of sheep grazing in an area polluted from the non-ferrous metal industry Abstract: 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 as profusely contaminated. Meadow hay (MH) from UA was used as a tested substrate of fermentation activity; it was incubated with buffered RF and HC inocula from CA and UA for 24 h. The gas volume in CA was significantly decreased by 50 and 36% in RF and HC, respectively. The methane production in CA was significantly decreased by 77 and 71% in RF and HC, respectively. The significantly decreased values of the fermentation parameters in CA in comparison with UA were accompanied by the reduced (P < 0.01) total concentration of rumen ciliate protozoa. Keywords: heavy metals, in vitro fermentation, rumen fluid, hindgut content, volatile fatty acids, rumen ciliates Journal: Czech Journal of Animal Science Pages: 66-72 Volume: 51 Issue: 2 Year: 2006 DOI: 10.17221/3911-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/3911-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200602-0004.txt Handle: RePEc:caa:jnlcjs:v:51:y:2006:i:2:id:3911-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: M. Petek Author-Workplace-Name: Department of Zootechnics, Faculty of Veterinary Medicine, University of Uludag, Bursa, Turkey Author-Name: S. Dikmen Author-Workplace-Name: Department of Zootechnics, Faculty of Veterinary Medicine, University of Uludag, Bursa, Turkey Title: The effects of prestorage incubation and length of storage of broiler breeder eggs on hatchability and subsequent growth performance of progeny Abstract: 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 results of long-term stored eggs compared to non-heated eggs. Hatchability results of eggs stored for 5 days were significantly better compared to eggs stored for 15 days. Subsequent growth performance of progeny was not significantly affected except for the main effect of egg storage on feed conversion. There were significant PRESI × egg storage interactions for apparent fertility, hatchability of total and fertile eggs and embryonic mortality. It was concluded that the PRESI treatment did not have a detrimental effect on the hatchability of broiler breeder eggs stored for 5 days and it might even increase hatchability while it had a detrimental effect on the hatchability of broiler breeder eggs stored for 15 days. Keywords: broiler, prestorage, performance Journal: Czech Journal of Animal Science Pages: 73-77 Volume: 51 Issue: 2 Year: 2006 DOI: 10.17221/3912-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/3912-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200602-0005.txt Handle: RePEc:caa:jnlcjs:v:51:y:2006:i:2:id:3912-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: F. Kirkpinar Author-Workplace-Name: Department of Feeds and Animal Nutrition, Faculty of Agriculture, Ege University, Izmir, Turkey Author-Name: H. BASMACIOGLU Author-Workplace-Name: Department of Feeds and Animal Nutrition, Faculty of Agriculture, Ege University, Izmir, Turkey Title: Effects of pelleting temperature of phytase supplemented broiler feed on tibia mineralization, calcium and phosphorus content of serum and performance Abstract: 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, total P, Na, K and Mg, Zn, Fe, Mn, Cu contents of tibia were not affected by the pelleting temperature. No effects of pelleting temperatures on Ca content in the serum were found out. However, P content in the serum was increased by feeding the diet pelleted at 65°C as compared to the control and other treatments. Pelleting at 65 and 75°C had a significant positive effect on body weights and body weight gains of broilers. It was concluded that the best pelleting temperature was 65°C. It is to note that the temperature of 85°C damages enzymatic activity. Keywords: pelleting temperature, broiler, phytase, tibia mineralization, growth Journal: Czech Journal of Animal Science Pages: 78-84 Volume: 51 Issue: 2 Year: 2006 DOI: 10.17221/3913-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/3913-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200602-0006.txt Handle: RePEc:caa:jnlcjs:v:51:y:2006:i:2:id:3913-CJAS Template-Type: ReDIF-Article 1.0 Author-Name: Z. Zakęś Author-Workplace-Name: Department of Aquaculture, Stanisław Sakowicz Inland Fisheries Institute, Olsztyn, Poland Author-Name: A. Kowalska Author-Workplace-Name: Department of Aquaculture, Stanisław Sakowicz Inland Fisheries Institute, Olsztyn, Poland Author-Name: S. Czerniak Author-Workplace-Name: Department of Aquaculture, Stanisław Sakowicz Inland Fisheries Institute, Olsztyn, Poland Author-Name: K. Demska-Zakęś Author-Workplace-Name: Department of Ichthyology, University of Warmia and Mazury, Olsztyn, Poland Title: Effect of feeding frequency on growth and size variation in juvenile pikeperch, Sander lucioperca (L.) Abstract: 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 did not have a significant effect on the analyzed zootechnical parameters (body weight, condition factor, intra-group body weight variability, feed conversion ratio). This pertained to both the fish fed in excess and the restricted regime. Keywords: Sander lucioperca, feeding schedule, feed ration, growth, size dispersion Journal: Czech Journal of Animal Science Pages: 85-91 Volume: 51 Issue: 2 Year: 2006 DOI: 10.17221/3914-CJAS File-URL: http://cjas.agriculturejournals.cz/doi/10.17221/3914-CJAS.html File-Format: text/html X-File-Ref: http://agriculturejournals.cz/RePEc/caa/references/cjs-200602-0007.txt Handle: RePEc:caa:jnlcjs:v:51:y:2006:i:2:id:3914-CJAS