Czech Journal of Animal Science, 2016 (vol. 61), issue 10

Bisphenol S instead of bisphenol A: a story of reproductive disruption by regretable substitution - a reviewReview

T. Žalmanová, K. Hošková, J. Nevoral, Š. Prokešová, K. Zámostná, T. Kott, J. Petr

Czech J. Anim. Sci., 2016, 61(10):433-449 | DOI: 10.17221/81/2015-CJAS  

A range of substances that are released into the environment, foodstuffs and drinking water as a result of human activity were originally considered relatively harmless, and it was only later that their adverse effects were discovered. In general the use of such substances is currently restricted, and they are often replaced by other substances. This applies also in the case of a range of endocrine disruptors. These substances have the capacity to disturb the balance of physiological functions of the organism on the level of hormonal regulation, and their pleiotropic spectrum of effects is very difficult to predict. Endocrine disruptors include the...

Effect of silver nanoparticles on the immune, redox, and lipid status of chicken bloodOriginal Paper

K. Ognik, E. Cholewińska, A. Czech, K. Kozłowski, Ł. Wlazło, B. Nowakowicz-Dębek, R. Szlązak, K. Tutaj

Czech J. Anim. Sci., 2016, 61(10):450-461 | DOI: 10.17221/80/2015-CJAS  

The aim of the study was to analyze how per os application of hydrocolloids of silver nanoparticles (22 nm) and lipid-coated silver nanoparticles (5 nm) affect the immune, redox, and lipid status of the blood of broiler chickens. The experiment was conducted on 60 chickens. The first group was the control (Group C). The chickens in Group II received a silver nanoparticle hydrocolloid (Ag-nano) at a dose of 5 mg/kg body weight (BW) per day. The chickens in Group III received a lipid-coated silver nanoparticle hydrocolloid (AgL-nano) at a dose of 5 mg/kg BW per day. Blood for analysis was collected from 24- and 38-day-old chickens and several...

Genetic diversity within and gene flow between three draught horse breeds using genealogical informationOriginal Paper

H. Vostrá-Vydrová, L. Vostrý, B. Hofmanová, E. Krupa, Z. Veselá, J. Schmidová

Czech J. Anim. Sci., 2016, 61(10):462-472 | DOI: 10.17221/91/2015-CJAS  

Three draught horse breeds are maintained in the Czech Republic: the Silesian Noriker (SN), the Noriker (N), and the Czech-Moravian Belgian (CMB). Because the SN and CMB populations are currently closed to outside breeding and are endangered (Genetic Resources), the loss of the genetic variation these horses represent is concerning. Genetic diversity within and between these three breeds and their population structures was analyzed based on pedigree information. Our goal was to identify and quantify factors that affected their genetic variability. The effective population size was analyzed in each breed. The numbers of generations were 22, 32, and...

Effect of dietary magnesium, calcium, phosphorus, and limestone grain size on productive performance and eggshell quality of hensOriginal Paper

M. Skřivan, M. Englmaierová, M. Marounek, V. Skřivanová, T. Taubner, T. Vít

Czech J. Anim. Sci., 2016, 61(10):473-480 | DOI: 10.17221/3/2016-CJAS  

Two experiments conducted on laying hens, aged 50 and 52 weeks, were carried out to evaluate the effect of dietary Mg and its relationship to the Ca : NPP (non-phytate phosphorus) ratio using a various grain-size of limestone. The Ca : NPP ratio in each experiment was 12.8 and 18, respectively. Two Mg levels were evaluated in the first (1.56 and 4.0 g/kg) and the second experiment (1.52 and 4.0 g/kg). A fine-grained limestone (< 0.5 mm; FL) or a coarse-grained limestone (0.8-2 mm; CL) was used in the first experiment. In the second experiment, a mixture of both the aforementioned limestone forms (FCL) was used as the third alternative. The main...

Effects of different stripping methods of female and activation medium on fertilization success in northern pike (Esox lucius)Original Paper

B.I. Cejko, B. Sarosiek, S. Krejszeff, S. Judycka, M. Szczepkowski, B. Szczepkowska, R.K. Kowalski

Czech J. Anim. Sci., 2016, 61(10):481-486 | DOI: 10.17221/19/2016-CJAS  

In this study, the quality of northern pike eggs collected by the traditional method (hand stripping) and the pneumatic method (air stripping) was compared. Additionally, different activation solutions (Billard solution, hatchery water, and Woynarovich solution) were tested for their effects on egg fertilization under artificial conditions. After the eggs were collected, the Pseudo-Gonado-Somatic Index (PGSI) was measured. Although the values of the PGSI in the samples obtained with use of air stripping were lower (13.8 ± 3.9%), they did not differ statistically from those obtained by hand stripping (16.5 ± 5.4%). Hatchery water and Woynarovich...