Czech Journal of Animal Science, 2008 (vol. 53), issue 9
Relationships among body condition score, milk yield and reproduction in Czech Fleckvieh cows
F. Jílek, P. Pytloun, M. Kubešová, M. Štípková, J. Bouška, J. Volek, J. Frelich, R. Rajmon
Czech J. Anim. Sci., 2008, 53(9):357-367 | DOI: 10.17221/335-CJAS 
The objective of this study was to confirm the relationship among body condition score at the time around parturition, milk yield in subsequent lactation, reproductive efficiency and BCS development in Czech Fleckvieh dairy cows. The BCS and milk yield were measured once a month and the cows were divided into groups according to their BCS before and after calving. Next, data from the database of cattle reproduction of the Czech Fleckvieh herd book were used. The dataset was analyzed by multifactorial analysis of variance using procedures COOR and GLM of the statistical program SAS. Cows with lower BCS in the 1st month after calving showed...
The evaluation of growth and selected carcass and meat quality parameters in fattening bulls fed a diet based on concentrates or maize silage
E. Štercová, A. Krása, R. Lepková, J. Šterc
Czech J. Anim. Sci., 2008, 53(9):368-376 | DOI: 10.17221/334-CJAS
The aim of the study was to evaluate the growth rate and selected carcass and meat quality parameters in bulls fed a high-grain diet and to compare the results with those obtained in bulls fed a diet based on preserved roughage. The trial included 18 Czech-Pied bulls fed a diet with a high proportion of concentrated feed and 18 Czech-Pied bulls fed a diet based on maize silage, used as a control group. The trial was launched after the weaning of calves. During the fattening period, live weight and average daily weight gain were monitored. The bulls were slaughtered at the live weight of 550-600 kg, the mean age at slaughter was 473 days for the high-grain...
Effects of avilamycin and essential oils on mRNA expression of apoptotic and inflammatory markers and gut morphology of piglets
A. Kroismayr, J. Sehm, M.W. Pfaffl, K. Schedle, C. Plitzner, W. Windisch
Czech J. Anim. Sci., 2008, 53(9):377-387 | DOI: 10.17221/338-CJAS
In this study 120 piglets were allotted to 3 dietary treatments, negative control group, one group receiving a blend of essential oils (EO) derived from oregano, anise and citrus peels (40 mg/kg diet), and a positive control group treated with avilamycin as growth promoting feed additive (40 mg/kg diet). On day 22 of the experiment, 12 representative animals from each treatment group were sacrificed and tissue samples were collected for quantitative real time-PCR analysis and gut tissue morphology. EO and avilamycin decreased the gene expression of the transcriptional factor NFκB and the apoptotic marker TNFα significantly in the ileum...
Hypodiploidy as a prominent attributor to chromosomal aneuploidy in transgenic rabbit embryos
S. Roychoudhury, J. Bulla, J. Čurlej, P. Chrenek
Czech J. Anim. Sci., 2008, 53(9):388-397 | DOI: 10.17221/336-CJAS
Transgenic animals play a vital role in basic research, agriculture and pharmaceutical industries. Rabbits have the advantage of other large laboratory species in that they have a short gestation period and yield large numbers of embryos. Production of transgenic rabbits has been directed towards using the rabbit as a model for large domestic animals or as a basic biological model for studying the mammalian gene regulation. In connection with their use, developmental and health disorders have also been reported in genetically modified animals. Random integration of a transgene can disrupt the function or regulation of an endogenous gene, resulting...
Effects of non-steroidal gonadal factors on LH secretion in female common carp during the reproductive cycle
J. Chyb, T. Mikolajczyk, M. Sokolowska-Mikolajczyk, M. Socha, P. Szczerbik, D. Biedroń, M. Dębowska, M. Kasiuk, J. Madej, E. Podczerwińska, M. Adamek, P. Epler
Czech J. Anim. Sci., 2008, 53(9):398-403 | DOI: 10.17221/337-CJAS
The aim of this study was to evaluate the effects of recombinant human inhibin A, recombinant human activin A and desteroidized ovarian extract on LH secretion in vitro and in vivo in female common carp during different stages of reproductive cycle. Inhibin stimulated spontaneous as well as GnRH-stimulated LH release in vivo in fish during gonadal recrudescence. This hormone did not have an influence on spontaneous LH secretion in the periovulatory period, but had a slightly inhibitory effect on GnRH-stimulated LH release in this stage of gonad maturity. Activin decreased spontaneous LH secretion during gonadal recrudescence and...