Czech Journal of Animal Science, 2010 (vol. 55), issue 12
Volume 55, Contents Author Index 2010
editors
Czech J. Anim. Sci., 2010, 55(12):I-V | DOI: 10.17221/2484-CJAS 
The effects of feeding various forages on fatty acid composition of bovine milk fat: A review
P. Kalač, E. Samková
Czech J. Anim. Sci., 2010, 55(12):521-537 | DOI: 10.17221/2485-CJAS
The nutritional image of bovine milk fat has suffered for years because of the association of saturated fatty acids and coronary heart disease. Thus the alteration of fatty acid composition has been a long-term strategy. Forages, even though containing a relatively low level of lipids, are the cheapest and often the major source of beneficial unsaturated fatty acids in ruminant diets. Recent progress in the research of factors affecting fatty acid content and composition in fresh and preserved forages and the associations between feeding such forages and milk fat profile are reviewed. Milk from cows grazed or fed fresh forage, especially from species-rich...
Anaerobic degradability of organic matter of cattle faeces and a possibility of its utilization
L. Kolář, J. Frelich, J. Brouček, S. Kužel, J. Borová-Batt, J. Peterka, M. Šlachta, K. Volfová, J. Pezlarová, J. Hřebečková, V. Čechová
Czech J. Anim. Sci., 2010, 55(12):538-547 | DOI: 10.17221/2888-CJAS
The content of organic matter labile fractions is negligible in cattle faeces but the content of the anaerobically degradable fraction on the boundary of organic matter lability and stability is analytically utilizable and different. It depends not only on feed quality and quantity but also on all factors of enteric fermentation and processes determining the digestion of ruminants. In the present paper we attempted to describe the digestive tract of ruminants as an anaerobic bioreactor and to calculate its mass balance so that the measurement of a difference in the anaerobic degradability of feeds and faeces at steady state could be theoretically demonstrated...
Meat quality defined based on pH and colour depending on cattle category and slaughter season
A. Węglarz
Czech J. Anim. Sci., 2010, 55(12):548-556 | DOI: 10.17221/2520-CJAS
The studies were carried out on 614 animals slaughtered in winter and summer seasons. After slaughter and post-slaughter processing the carcasses were evaluated according to EUROP system. The meat pH and its colour were determined in m. longissimus thoracis after 48 hours of chilling. A significant effect of cattle category, season of slaughter and interactions between them on meat pH was found. High pH values were observed mainly in the summer season in the groups of young bulls (A) (6.1) and bulls (B) (6.07). Slightly lower values 5.94 and 5.65, respectively, were observed in both above-mentioned groups in winter. Meat collected from heifers...
Developmental patterns of FASN and LIPE mRNA expression in adipose tissue of growing Jinhua and Landrace gilts
Z. Miao, F. Zhu, H. Zhang, X. Chang, H. Xie, J. Zhang, Z. Xu
Czech J. Anim. Sci., 2010, 55(12):557-564 | DOI: 10.17221/2514-CJAS
The present study was aimed to investigate the developmental patterns of FASN (fatty acid synthase) and LIPE (lipase, hormone-sensitive) mRNA in adipose tissue in pigs of different breeds and the relation with carcass fat content. Subcutaneous adipose tissue was sampled and total RNA was extracted to determine FASN and LIPE mRNA levels by semi-quantitative RT-PCR. The results showed that the FASN mRNA level increased with age (P < 0.05) and Jinhua gilts expressed higher FASN mRNA compared with Landrace gilts at 80 and 125 days of age (P < 0.05). In addition, Jinhua gilts expressed...
The use of selenium-enriched alga Scenedesmus quadricauda in a chicken diet
M. Skřivan, V. Skřivanová, G. Dlouhá, I. Brányiková, V. Zachleder, M. Vítová
Czech J. Anim. Sci., 2010, 55(12):565-571 | DOI: 10.17221/2480-CJAS
The selenium-enriched Scenedesmus biomass of patented selenium-resistant strain SeIV was tested in a broiler chicken diet in comparison with sodium selenite supplementation. Feed conversion, mortality and live weight were not significantly influenced by the source of selenium. Supplementation of either form of selenium significantly increased the Se concentration in breast muscle with a more pronounced effect (P < 0.001) caused by selenium enriched Scenedesmus (635 μg/kg DM, 229 μg/kg DM in control). Breast meat of chickens fed a diet with sodium selenite or Se-Scenedesmus had a significantly (P...
The effect of dietary selenium sources and levels on performance, selenium content in muscle and glutathione peroxidase activity in broiler chickens
J. Heindl, Z. Ledvinka, M. Englmaierová, L. Zita, E. Tůmová
Czech J. Anim. Sci., 2010, 55(12):572-578 | DOI: 10.17221/2487-CJAS
The study examined the effect of dietary supplements of sodium selenite (SS), selenium-enriched yeast (Sel-Plex®, SP) and selenium-enriched alga Chlorella (SCH) on growth traits, carcass analysis, selenium content in breast meat, glutathione peroxidase (GSH-Px) activity in breast and thigh meat and liver of chickens. The experiment was realized with seven hundred thirty-five cockerels Ross 308 randomly divided into 7 dietary treatments with 3 replications in each treatment. Chickens were fed a diet supplemented with 0 (control), 0.15 or 0.30 mg of selenium/kg in the form of sodium selenite (SS), Sel-Plex® (SP) and selenium-enriched...