Czech Journal of Animal Science, 2004 (vol. 49), issue 4
A relationship between production and reproduction traits in cows of Czech Pied cattle
D. Vaněk
Czech J. Anim. Sci., 2004, 49(4):131-136 | DOI: 10.17221/4290-CJAS 
The purpose of the paper was to analyse the effect of the level of milk yield and breeding value on reproduction of Czech pied cows. In the study of cows that calved in the period 1999-2001 the results for 41 357 cows from the central database were used analytically. The study was focused on the following traits: breeding value of the father of the cow for kg of milk, breeding value of the mother of the cow for kg of milk, the cow's milk yield in the 1st to the 3rd lactation, and reproduction traits after the 1st and 2nd calving. To determine the effect of the breeding value of the father or mother of the cow on reproduction traits of daughters the...
The effect of branched chain amino acids on proteosynthesis in skeletal muscles of japanese quail during ontogenesis
J. Antalíková, M. Baranovská, J. Jankela
Czech J. Anim. Sci., 2004, 49(4):137-143 | DOI: 10.17221/4291-CJAS
We studied the influence of branched chain amino acids on the muscle proteosynthesis of Japanese quail during ontogenesis. We used in vitro incubation of these muscles: musculus extensor metacarpalis radialis (EMR) - wing muscle, musculus ambiens (MA) - leg muscle. The incorporation of 14C-tyrosine into the individual protein fractions was evaluated. Influences of valine, leucine and isoleucine on proteosynthesis on day 14, 28 and 53 of life of Japanese quails were compared. Different patterns of individual protein fractions were detected. During ontogenesis, in the MA the number of fractions remained unchanged...
Nutritive value of broad-leaved dock (Rumex obtusifolius L.) and its effect on the quality of grass silages
S. Hejduk, P. Doležal
Czech J. Anim. Sci., 2004, 49(4):144-150 | DOI: 10.17221/4292-CJAS
The effect of broad-leaved dock (Rumex obtusifolius L.) on the impaired nutritive value of grassland herbages was studied together with the effect of dock and addition of microbial inoculant on the fermentation process in grass silages. The herbage of broad-leaved dock exhibits low DM content, CP and fibre contents comparable with red clover, yet its NEL concentration is low. Quality of silages made of dock at DM content over 300 g/kg is good but the silages show significantly lower contents of lactic acid (35.9%), acetic acid (70.0%) and higher pH values (4.69 vs. 4.35) as compared with the grass silage. Silages made of dock do not contain...
In vitro ruminal degradability of cereal grain starch
O. Tománková, P. Homolka
Czech J. Anim. Sci., 2004, 49(4):151-155 | DOI: 10.17221/4293-CJAS
An in vitro method was used to determine ruminal degradability of starch (IVRDS) in a set of cereal grains. The set included 9 feed samples, including 2 samples of ground wheat, 2 samples of wheat treated with sodium hydroxide, ground barley, barley treated with sodium hydroxide, 2 samples of ground oats and ground maize. Ruminal degradability of starch was assayed by the feed fermentation for 2, 4, 6, 16 and 24 hours. A significant difference in starch degradability was found between treated and untreated ground samples after 2-hour fermentation (13.73 ± 3.12 vs. 32.77 ± 8.17; P < 0.001), 4-hour fermentation (33.44...
Growth performance of juvenile pikeperch, Sander lucioperca (L.) fed graded levels of dietary lipids
Z. Zakes, A. Przybyl, M. Wozniak, M. Szczepkowski, J. Mazurkiewicz
Czech J. Anim. Sci., 2004, 49(4):156-163 | DOI: 10.17221/4294-CJAS
The aim of the experiment was to determine the effect of graded lipid content in experimental isoprotein feed (6, 10, 14% lipids and 45% protein) on the growth performance of juvenile pikeperch (initial body weight P < 0.05). Feed conversion ratio (FCR) and protein efficiency ratio (PER) attained the most advantageous values in this group of fish. The application of the experimental feed had a significant effect on the lipid values in fish bodies and viscera (P < 0.05) although no relationship was detected between the lipid content of the feed and that of the fish muscles. The lipid content was approximately 7.7% in all the...
Lead and cadmium levels in raw cow's milk from an industrialised Croatian region determined by electrothermal atomic absorption spectrometry
I. Pavlovic, M. Sikiric, J. L Havranek, N. Plavljanic, N. Brajenovic
Czech J. Anim. Sci., 2004, 49(4):164-168 | DOI: 10.17221/4295-CJAS
A simple and accurate method for lead and cadmium determination in raw cow's milk by electrothermal atomic absorption spectrometry (ET-AAS) is described. Milk from fifteen farms near Križ in Zagreb region was sampled from the collective sample directly into plastic bottles (to avoid contamination) four times during the March of 2000. The milk samples were digested in an MLS-1200 Mega Microwave digestion system with MDR Technology. Lead and cadmium were determined directly by ET-AAS in the solutions of digested samples. Statistical analyses were performed using statistical software SAS v. 8.0. Both the farm and the date as well as their interaction...
A comparison of Holstein Friesian, Brown Swiss and Eastern Anatolian Red cattle slaughtered in Turkey for carcass conformation and fatness in SEUROP system
A. Onenc
Czech J. Anim. Sci., 2004, 49(4):169-176 | DOI: 10.17221/4296-CJAS
The study was conducted to compare the carcass conformation and fatness of common slaughter cattle breeds in Turkey. A total of 878 carcasses from pure Holstein Friesian (HF, n = 381), pure Brown Swiss (BS, n = 314) and pure and crosses of Eastern Anatolian Red (EAR, n = 183) males that had been slaughtered in a commercial abattoir between1 October 2000 and1 October 2001 were evaluated. Carcass conformation and fatness classes were evaluated subjectively using photographic patterns according to the SEUROP classification system. According to the data of this study, HF and BS carcasses were heavier and had a better class in...