Czech Journal of Animal Science, 2004 (vol. 49), issue 1
Contact and non-contact thermometry in the milk acquisition process
I. Karas, R. Gálik
Czech J. Anim. Sci., 2004, 49(1):1-7 | DOI: 10.17221/4264-CJAS 
Temperatures of the northern wall, ceiling and floor of a 2 × 12 milking house as well as of a waiting area in front of the milking house were measured for 24 hours a day in the winter season with an average external daily temperature of -8.6°C. The influence of low external temperatures on the temperatures of cows' mammary glands was measured with a non-contact thermometer RAYNGER ST 6 equipped with laser. The analysis showed that the low external temperatures and insufficiently warmed external walls [average 24-hour temperatures: (tst = +1.32°C), ceiling (ts = +2.65°C), floor (tp = +3.29°C)]...
Non-invasive measurement of chick embryo cardiac work
K. Pawlak, J. Niedzióka
Czech J. Anim. Sci., 2004, 49(1):8-15 | DOI: 10.17221/4265-CJAS
This study used a non-invasive method of ballistocardiography to investigate cardiac work of chick embryos. In this method, an eggshell with electric charges on it is one capacitor plate, the other being a receiving antenna of the measuring equipment. Chick embryo cardiac work induces micro-movements of the whole egg, resulting in changes in the distances between the plates and thus in the difference of potentials between the shell and the receiving antenna. This is registered by the measuring equipment. The first single signals of cardiac work were registered on day 7 of incubation. Starting from day 9, the signal was recorded from all embryos. During...
Breeding value evaluation in Polish fur animals: Statistical description of fur coat and reproduction traits - relationship and inbreeding
H. Wierzbicki, A. Filistowicz, W. Jagusiak
Czech J. Anim. Sci., 2004, 49(1):16-27 | DOI: 10.17221/4266-CJAS
Three data sets were available: records on conformation and coat traits for the arctic fox from one farm (5 540 observations, collected between 1983 and 1997), and the same traits for the silver fox from three farms (8 199 observations, collected between 1984 and 1999). The third set comprised 5 829 observations on reproductive performance of the arctic fox from one farm, collected between 1984 and 1999. The GLM procedure was used to test the significance of fixed effects on the analysed reproduction traits as well as differences between groups. Phenotypic trends as well as relationship and inbreeding across the studied years were computed. Most of...
Use of Chlorella as a carrier of organic-bound iodine in the nutrition of sows
V. Kotrbáček, J. Doucha, T. Offenbartl
Czech J. Anim. Sci., 2004, 49(1):28-32 | DOI: 10.17221/4267-CJAS
The effect of supplementation with iodine incorporated into biomass of the unicellular alga Chlorella on the content of this element in colostrum and milk was investigated in sows of the Large White breed. Experiments were conducted in two elite herds with different levels of iodine supply in basal feed mixtures. On farm A the feed mixture contained 1 549 µg I/kg, on farm B it was 228 µg I/kg. Pregnant sows on both farms were divided into control and experimental group a fortnight before parturition. Control group comprised 8 sows on farm A and 6 sows on farm B. As the sows on both farms received feed rations of 3 kg feed per head/day,...
The effect of digitonin on egg quality, cholesterol content in eggs, biochemical and haematological parameters in laying hens
E. Tůmová, H. Härtlová, Z. Ledvinka, A. Fučíková
Czech J. Anim. Sci., 2004, 49(1):33-37 | DOI: 10.17221/4268-CJAS
The aim of the present study was to describe the effect of digitonin on egg quality, cholesterol content in eggs, some parameters of serum lipid metabolism and blood picture of laying hens. The experiment was split into 3 groups (8 laying hens per group); group 1 was fed control feed mixture with 16.54% crude protein and 11.61 MJ ME, group 2 received control feed mixture with 0.01% digitonin and supplement of digitonin in group 3 was 0.025%. Digitonin in the amount 0.025% significantly (P≤ 0.05) reduced egg weight from 65.07 g in control group to 61.44 g in group 3, white weight (41.21 g vs. 37.96 g), and egg cholesterol content (13.64...
Pig carcass quality and pH1 values of meat
J. Pulkrábek, J. Pavlík, L. Vališ
Czech J. Anim. Sci., 2004, 49(1):38-42 | DOI: 10.17221/4269-CJAS
The data on 964 pig carcasses were examined with the objective to determine the relationship between a high carcass lean meat content in currently used pig hybrids and deterioration of the quality traits important for further processing of meat. The average slaughter weight of pigs was equal to 106.2 ± 0.417 kg. Lean meat percentage determined by the FOM instrument with the average value of 54.50 ± 0.139% was used as the main quantitative carcass trait. For the assessment of meat quality, the pH1 value (average 6.15 ± 0.011) was used in the same way as in the system of breeding animals' progeny testing. The relationship...
Fish community structure of the middle course of the Bečva River
J. I Namin, P. Spurný
Czech J. Anim. Sci., 2004, 49(1):43-50 | DOI: 10.17221/4270-CJAS
Fish communities of the Bečva River were studied in summer and autumn 2000 and 2001. Electric fishing gear (Honda EX 1000, DC 230 V, 0.75-0.9 kW) was used for sampling. Four sampling sites (Grymov 19.6 r. km, Rybáře 35.8 r. km, Hustopeče 50.7 and Choryně 54.7 r. km) were selected. Total of 23 fish species representing 5 families were determined. The family Cyprinidae with 15 species was dominant while Salmonidae, Balitoridae, Percidae and Gadidae were the other recorded families. Species diversity ranged from 9 at Hustopeče to 20 at Grymov localities. The lowest biomass and abundance were observed at Hustopeče locality (28.93 kg/ha and 336 fishes/ha)...