Czech Journal of Animal Science, 2008 (vol. 53), issue 10
Selection of a suitable definition of environment for the estimation of genotype × environment interaction in the weaning weight of beef cattle
L. Vostrý, J. Přibyl, V. Jakubec, Z. Veselá, I. Majzlík
Czech J. Anim. Sci., 2008, 53(10):407-417 | DOI: 10.17221/351-CJAS 
Genotype by environment interactions for weaning weight in beef cattle were tested using several definitions of environments. Four breeds of beef cattle (Hereford, Aberdeen Angus, Beef Simmental, and Charolais) were represented. The environments were defined according to five criteria: altitude, production areas, economic value of the land, less favourable areas, and performance levels of a breed within herds. Ten mixed models were compared including the effects of direct and maternal genetics, herd-year-season, maternal permanent environmental, breed, environment, genotype × environment interaction, sex of calf, and age of dam. The suitability of...
Replacement of soya in pig diets with white lupine cv. Butan
Z. Zralý, B. Písaříková, M. Trčková, M. Doležal, J. Thiemel, J. Simeonovová, M. Jůzl
Czech J. Anim. Sci., 2008, 53(10):418-430 | DOI: 10.17221/353-CJAS
The purpose of the present study was to evaluate the effect of soya replacement (50 or 100%) with whole (WL) or dehulled seeds (DL) of white lupine cv. Butan in the diets for market pigs. The experiment was performed on 50 pigs in equal numbers of barrows and gilts with the initial mean body weight (BW) of 18.3 ± 2.1 kg, fed isonitrogenous and isoenergetic diets for 100 days. In the experimental starter pigs (18 to 35 kg BW), the mean daily body weight gain (BWG) was 0.61 to 0.64 kg and was insignificantly lower by 1.5 to 6.2% in comparison with the pigs fed the control soya diet (SBM). The diet intake was also lower by 5.4 to 6.8% and could...
The effect of lycopene supplementation on lipid profile and meat quality of broiler chickens
S. Ševčíková, M. Skřivan, G. Dlouhá
Czech J. Anim. Sci., 2008, 53(10):431-440 | DOI: 10.17221/350-CJAS
An experiment was conducted to determine the effect of lycopene on lipid profile and quality of meat of broiler chickens Ross 308 at a different form of selenium. 540 broiler cockerels were randomly divided into 6 groups: without lycopene supplement (groups C and E3), supplemented with 50 mg/kg lycopene (groups E1 and E4), supplemented with 100 mg/kg lycopene (groups E2 and E5) while the source of selenium was sodium selenite (groups C, E1, E2) and Se-enriched yeast (groups E3, E4, E5). The experimental period was from 14 to 35 days of broiler age and was terminated by slaughter. The organic form of dietary selenium increased (P ≤ 0.05) its...
Comparison of ovarian cycles of Hungarian riverine fish species representing different spawning strategies 441
K.K. Lefler, Á. Hegyi, F. Baska, J. Gál, Á. Horváth, B. Urbányi, T. Szabó
Czech J. Anim. Sci., 2008, 53(10):441-452 | DOI: 10.17221/352-CJAS
Investigations on the ovarian cycle of fish species that inhabit Hungarian rivers are necessitated by both environmental and economic reasons. The objective of our research was to explore new fundamental knowledge concerning the ovarian cycle of the white bream (Blicca bjoerkna, Linnaeus, 1758), barbel (Barbus barbus, Linnaeus, 1758), orfe (Leuciscus idus, Linnaeus, 1758) and nase (Chondrostoma nasus, Linnaeus, 1758). Histological investigation of ovaries and determination of proportions of oocytes in different stages of development is an appropriate method for the description of spawning characteristics of these species....