Czech Journal of Animal Science, 2009 (vol. 54), issue 1
Influence of elevated content of cadmium and arsenic in diet containing feeding yeast on organisms of rats
J. Száková, V. Zídek, D. Miholová
Czech J. Anim. Sci., 2009, 54(1):1-9 | DOI: 10.17221/1739-CJAS 
The influence of elevated cadmium content in diet on the content of this element in liver, kidney and testes of 68 male rats was studied in dependence on the chemical form of applied cadmium (as inorganic salt - CdCl2 and organically bound in yeast cells); the influence of elevated arsenic content (as NaAsO2) in diet on its content in the same organs was also investigated. The interactions between arsenic and cadmium in the above-mentioned organs were studied. The addition of cadmium to the diet of rats significantly (P < 0.05) increased cadmium content in several organs. The addition of yeast containing the natural...
Effects on growth performance, faecal microflora and plasma cholesterol after supplementation of spray-dried metabolite to postweaning rats
T.C. Loh, S.W. Chong, H.L. Foo, F.L. Law
Czech J. Anim. Sci., 2009, 54(1):10-16 | DOI: 10.17221/1738-CJAS
A study was conducted to study the effects of feeding a spray-dried metabolite (SDM) produced by Lb. Plantarum I-UL4 in the diets of postweaning rats on growth performance, faecal pH, Enterobacteriaceae bacterial and lactic acid bacteria (LAB) counts in the faeces and on plasma cholesterol concentrations. A total of 15 female 4-weeks-old Sprague dawley rats were randomly assigned to 3 groups of diets: basal diet (control), 0.25% SDM and 0.5% SDM diets. Daily feed intake, daily growth rate, blood plasma for total cholesterol concentration and faecal Enterobacteriaceae and LAB were measured. The growth rate, total feed intake,...
The effect of genotype, housing system and egg collection time on egg quality in egg type hens
E. Tůmová, M. Skřivan, M. Englmaierová, L. Zita
Czech J. Anim. Sci., 2009, 54(1):17-23 | DOI: 10.17221/1736-CJAS
The effect of egg collection time, genotype and housing system on egg quality characteristics was evaluated in an experiment with laying hens of ISA Brown, Hisex Brown and Moravia housed on litter and in conventional cages. The experiment was conducted from 20 to 64 weeks of age. Eggs were collected and recorded daily at 06:00, 10:00 and 14:00 h. Once every four weeks, two days in row, all eggs laid from each pen or cage at each oviposition time were used for egg quality analyses (total 1 694 eggs). Egg collection time was dependent on genotype. Significantly more eggs were laid at 06:00h by ISA Brown while Moravia laid eggs mainly at 10:00 and 14:00...
Investigation of the effect of probiotics and potentiated probiotics on productivity of laying hens
S. Mátéová, M. Gaálová, J. Šály, M. Fialkovičová
Czech J. Anim. Sci., 2009, 54(1):24-30 | DOI: 10.17221/1735-CJAS
Probiotic bacteria are used to balance a disturbed intestinal microflora and dysfunctions of the gastrointestinal tract (GIT). They could be an effective alternative to the use of synthetic substances in nutrition and medicine. We investigated the effect of probiotics and potentiated probiotics on the productivity of laying hens. An experiment was carried out on 30 hens of the Hyssex layer hybrid starting from week 30 of laying. The hens were divided into three groups, 10 hens in each (K - control group, L - hens supplemented with probiotics and L + E - hens fed probiotics potentiated with essential oils). No statistically significant differences among...
Limnological changes in a pond ecosystem caused by grass carp (Ctenopharyngodon idella Val.) low stocking density
I. Pípalová, J. Květ, Z. Adámek
Czech J. Anim. Sci., 2009, 54(1):31-45 | DOI: 10.17221/1737-CJAS
Grass carp (Ctenopharyngodon idella Val.) stocked (29 kg/ha) in a small pond reduced the biomass of aquatic macrophytes from 109 g/m2 to 33 g/m2 during one growing season. The only changes in hydrochemical parameters (pH, alkalinity, acidity, BOD5, CODMn, NH4-N, NO2-N, NO3-N, TN, PO4-P and TP) associated with the grass carp stocking were a decrease in pH (from 8.43 to 7.57) and in NO3-N concentration (from 0.99 mg/l to 0.56 mg/l). The increases in organic matter content and NO3-N concentration in the surface sediment layer were higher...