Czech Journal of Animal Science, 2007 (vol. 52), issue 12
Effects of protein kinase C on parthenogenetic activation of pig oocytes using calcium ionophore or nitric oxide-donor
J. Petr, E. Chmelíková, A. Dörflerová, M. Ješeta, Z. Kuthanová
Czech J. Anim. Sci., 2007, 52(12):415-422 | DOI: 10.17221/2336-CJAS 
Porcine oocytes matured in vitro were activated for parthenogenetic development using either calcium ionophore (50μM for 10 min) or nitric oxide donor SNAP (2mM for 23.5 hours). Protein kinase C (PKC) inhibitors, bisindolylmaleimide I or rottlerin, are able to inhibit parthenogenetic activation induced by calcium ionophore. The rate of activated oocytes decreased from 69% to 2% (P < 0.05) under the effect of bisindolylmaleimide I at a concentration of 0 or 20nM, respectively. The activation rate decreased from 68% to 0% (P < 0.05) under the influence of 0 or 20μM rottlerin, respectively. PKC inhibitors Go6976 or hispidin...
Effect of the application of bioplexes of zinc, copper and manganese on milk quality and composition of milk and colostrum and some indices of the blood metabolic profile of cows
S. Kinal, A. Korniewicz, M. Słupczyńska, R. Bodarski, D. Korniewicz, B. Čermák
Czech J. Anim. Sci., 2007, 52(12):423-429 | DOI: 10.17221/2338-CJAS
The object of an experiment was inorganic and organic forms of zinc, copper and manganese applied in mineral mixtures to dairy cows. The experiment was carried out on 90 cows with average milk yield for previous lactation of about 9 500 kg milk. The cows received mineral mixtures containing inorganic or organic forms of zinc, copper and manganese for 6 weeks before calving and during the first three months of lactation. The application of microelements as bioplexes in amounts covering 30% of daily requirements of cows had a positive effect on an increase in colostrum dry matter content from 20.9 to 23.35% as well as on the concentration of protein...
Use of computer image analysis for in vivo estimates of the carcass quality of bulls
P. Polák, T. Sakowski, E.N. Blanco Roa, J. Huba, E. Krupa, J. Tomka, D. Peškovičová, M. Oravcová, P. Strapák
Czech J. Anim. Sci., 2007, 52(12):430-436 | DOI: 10.17221/2333-CJAS
The aims of the paper were to construct models for the estimation of carcass quality by means of computer image analysis and to verify computer photometry as an in vivo method of carcass quality prediction. Results of photometric measurements and carcass quality of 118 Slovak Pied bulls slaughtered at the age of 15 to 18 months were analysed. Nine length dimensions and four area dimensions were measured on the images of the top, left and rear view of each animal. Hot carcass weight (HCW), weight of meat in carcass (WMC) and weight of meat in valuable cuts (WMVC) were obtained after slaughter treatment and carcass dissection. HCW, WMC and WMVC...
The relationship between somatic cell count, milk production and six linearly scored type traits in Holstein cows
E. Němcová, M. Štípková, L. Zavadilová, J. Bouška, M. Vacek
Czech J. Anim. Sci., 2007, 52(12):437-446 | DOI: 10.17221/2337-CJAS
Test-day records of somatic cell count (SCC), milk yield, fat and protein content and six linearly scored type traits (fore udder attachment, udder depth, central ligament, rear udder height, front teat placement, teat length) of 22 613 first lactation cows from 117 herds were included in this study. SCC was log-transformed into somatic cell score (SCS). Milk yield was standardized as follows: MILK = milk yield (fat content + protein content)/(3.8 + 3.2). For each analyzed type trait, cows were assigned to one of the three levels according to linear type score: level 1 (score 1 and 2); level 2 (score 5 and 6); level 3 (score 8...
Effects of different dietary threonine levels on growth and slaughter performance in finishing pigs
C. Plitzner, T. Ettle, S. Handl, P. Schmidt, W. Windisch
Czech J. Anim. Sci., 2007, 52(12):447-455 | DOI: 10.17221/2334-CJAS
The objective of this study was to determine the threonine (Thr) requirement of a modern crossbred growing pig from Austria in the finisher stage (67 to 113 kg body weight). For on average 50 days, 30 castrated male and 30 female pigs were fed isonitrogenous diets (135 g/kg crude protein, 8.0 g/kg lysine) supplemented with increasing levels of crystalline Thr. Total dietary Thr contents (g/kg) were 4.9 (basal diet), 5.0, 5.4, 5.8, 6.1, 6.5, corresponding to a Thr:Lys ratio of about 0.60, 0.64, 0.68, 0.73, 0.76, 0.81. Dietary Thr concentration of 5.4 g/kg improved daily gains by about 15 percentage points (P < 0.05) and the feed conversion...
Nutritional and net energy value of fermented olive wastes in rations of lactating ewes
V. Christodoulou, V.A. Bampidis, P.H. Robinson, C.J. Israilides, A. Giouzelyiannis, A. Vlyssides
Czech J. Anim. Sci., 2007, 52(12):456-462 | DOI: 10.17221/2332-CJAS
In an experiment with 18 lactating Chios ewes, the replacement of barley grain, wheat grain, sugar beet pulp and lucerne meal with fermented olive wastes (FOW), maize grain and soybean meal was used to formulate diets that allowed the net energy (NE) for lactation (NEl) density of FOW to be calculated. In the experiment, which lasted 8 weeks, ewes were allocated, after equal distribution for milk yield, body weight (BW) and lactation number, into three treatments of 6 ewes each in a Youden square experimental design with 4 consecutive periods of 14 days. Ewes in all groups were offered a concentrate mixture ad libitum (1.12 kg/ewe/day,...
Feed input and excreta collection time in metabolisable energy assays for ducks
C.L. Zhang, S.S. Hou, Y.H. Wang, F.Z. Liu, M. Xie
Czech J. Anim. Sci., 2007, 52(12):463-468 | DOI: 10.17221/2331-CJAS
Three experiments were conducted to determine the optimal feed input and excreta collection time by a bioassay of dietary true metabolisable energy (TME) for ducks. In experiment 1 and experiment 2, the time for the unabsorbed feed passage through the alimentary canal was determined by measuring the DM and energy of excreta and feed residues in the alimentary canal at different periods. In experiment 3, the feed input of force-feeding was studied and a total of 70 mature Pekin drakes were allotted to 7 groups, each group containing 10 birds. After fasting for 36 h, one group served as a negative control to measure metabolic faecal energy plus...
VOLUME 52, CONTENTS and AUTHOR INDEX
editors
Czech J. Anim. Sci., 2007, 52(12):469-476 | DOI: 10.17221/2335-CJAS