Czech Journal of Animal Science, 2010 (vol. 55), issue 10
The effect of individuality of animal on diurnal pattern of pH and redox potential in the rumen of dry cows
M. Richter, L. Křížová, J. Třináctý
Czech J. Anim. Sci., 2010, 55(10):401-407 | DOI: 10.17221/1695-CJAS 
The aim of this study was to continuously monitor ruminal pH and redox potential of individual dry cows using a newly developed wireless device. Three dry Holstein cows fitted with rumen cannulas were used for the individual measurement of ruminal pH and redox potential (Eh) using a newly developed wireless device. The experiment was carried out in the period of 14 days consisting of a 10-day preliminary period followed by a 4-day measurement period. Cows were fed twice daily the diet based on maize silage, lucerne hay and concentrate. During the measurement period ruminal pH and redox potential were monitored continuously using a developed wireless...
Effect of intensive fattening of lambs with forages on the fatty acid profile of intramuscular and subcutaneous fat
U. Kaczor, B. Borys, H. Pustkowiak
Czech J. Anim. Sci., 2010, 55(10):408-419 | DOI: 10.17221/1697-CJAS
The effect of forage and breed of lambs on the fatty acid profile of intramuscular fat in m. longis-simus lumborum (LL) and depot fat (SCF) above this muscle was investigated. The study was carried out in two replications on 36 Koluda sheep (KS) and Ile de France×KS (IF×KS) ram-lambs fattened intensively to 32-37 kg of body weight. Lambs were fed ad libitum the same concentrate mixture and different roughage supplements: grass hay in group C (control), field forage fed in a sheep house in group F, and pasture grazing (4 h/day) in group P. In the case of LL fat, the composition of fatty acids was found to deteriorate in lambs...
Effect of different phosphorus levels on the performance and egg quality of laying hens fed wheat- and maize-based diets
M. Skřivan, M. Englmaierová, V. Skřivanová
Czech J. Anim. Sci., 2010, 55(10):420-427 | DOI: 10.17221/1699-CJAS
The effects of diet type (wheat- or maize-based) and concentration of available phosphorus (AP; about 4, 3 and 2 g/kg) on the parameters of hen performance and egg quality as well as shell calcium (Ca) and phosphorus (P) contents were examined. Two experiments were carried out in which 240 and 120, respectively, older ISA Brown hens were housed in enriched cages. The interaction of diet type and AP concentration was ascertained for all evaluated characteristics except the amount of Ca and P deposited in shells in the first experiment. In the second experiment, the interaction of diet type and AP concentration was found for feed intake, egg weight,...
Laying pattern parameters in broiler breeder hens and intrasequence changes in egg composition
M. Gumulka, E. Kapkowska, D. Maj
Czech J. Anim. Sci., 2010, 55(10):428-435 | DOI: 10.17221/1698-CJAS
The aim of the study was to analyze the pattern of oviposition time in laying sequences in broiler breeder hens and to determine a relationship between egg position in the sequence and egg quality. The sequences were described using mean oviposition time (hour) within a sequence, mean lag of oviposition time between successive ovipositions, and mean and cumulative lag of oviposition for a sequence. Egg weight, percentage of egg components and shape index were determined for successive eggs in a sequence. The 2-, 3-, 4-, 5- to 6- and 7- to 9-egg sequences were considered. The light/dark regime was 16 h/8 h (05:00 a.m. to 09:00 p.m.). Hens laid the first...
Effect of the age and season of fattening period on carbon dioxide emissions from broiler housing
M. Knížatová, Š. Mihina, J. Brouček, I. Karandušovská, G.J. Sauter, J. Mačuhová
Czech J. Anim. Sci., 2010, 55(10):436-444 | DOI: 10.17221/1701-CJAS
The quantification of emissions of greenhouse gases from human activities is of prime importance for determining the importance of their effect on the environment. The aim of this study was to test a hypothesis that the interior concentration and emission of carbon dioxide in chicken housing is impacted by the age of animals and season of fattening period. Carbon dioxide (CO2) concentrations and emissions were assessed over six fattening periods in total. The major part of CO2 seemed to have its origin in bird respiration with assumed production of approx. 147 kg of CO2/h. CO2 emission was most affected by chickens...
Evaluation of semen quality of endangered Caspian brown trout (Salmo trutta caspius) in different times of spermiation during the spawning season
S. Hajirezaee, B. Mojazi Amiri, A. Mirvaghefi, A. Sheikh Ahmadi
Czech J. Anim. Sci., 2010, 55(10):445-455 | DOI: 10.17221/1696-CJAS
Sperm motility and sperm production as well as organic and inorganic components present in the seminal plasma were measured at different time periods of spermiation during the spawning season in order to evaluate the semen quality in Caspian brown trout, Salmo trutta caspius. For such evaluation, males were divided into four groups based on the date of spermiation: group A (pre-mature broodstocks), group B and C (mid-mature broodstocks), group D (late-mature broodstocks). Our results showed that the Caspian brown trout produces semen of variable quality depending on the date in the period of spermiation. In this regard, the percentage of motile...
Assessing losses of genetic variability in the endangered Mallorquí horse
I. Álvarez, L.J. Royo, L. Pérez-Pardal, I. Fernández, L. Payeras, F. Goyache
Czech J. Anim. Sci., 2010, 55(10):456-462 | DOI: 10.17221/1700-CJAS
Information contained in the studbook of the endangered Mallorquí horse was analysed to assess the genetic variability of the breed. Also, the effect of selection for coat colour variation was assessed using a set of 15 microsatellites genotyped on 68 Mallorquí reproductive individuals previously diagnosed for the presence of the chestnut allele on the melanocortin-1 receptor gene. Mean inbreeding for the whole pedigree (310 individuals) was 2.5% while that for the individuals born during the last three years of recording (reference population) was 4.7%. Only 70% of all the founders have genetic representation in the reference population. A comparison...