Czech Journal of Animal Science, 2018 (vol. 63), issue 10
How do herd's genetic level and milk quality affect performance of dairy farms?Original Paper
Helis Luik-Lindsaar, Ants-Hannes Viira, Haldja Viinalass, Tanel Kaart, Rando Värnik
Czech J. Anim. Sci., 2018, 63(10):379-388 | DOI: 10.17221/63/2017-CJAS 
The effects of genetic level and output quality characteristics on technical efficiency (TE) of dairy farms were studied. The average total relative breeding value (RBV) at herd level was considered a parameter of the genetic level and production potential of the main input (dairy cows), while somatic cell count (SCC) and milk composition characterise the quality of the main output (milk) of dairy farms. The analysis was carried out in two stages: data envelopment analysis was used in the first stage and fractional regression model in the second stage, combining the data collected by the Estonian Farm Accountancy Data Network with the data from the...
Effects of different durations of fasting/re-feeding bouts on growth, biochemical and histological changes in the digestive tract of Gansu golden trout (Oncorhynchus mykiss)Original Paper
Xia Liu, Ibrahim Magdy Mohamed Hegab, Junhu Su, Xiaohua Du, Xiping Fan, Qiong Zhang, Yuan Gao, Haifang Wang
Czech J. Anim. Sci., 2018, 63(10):389-398 | DOI: 10.17221/107/2017-CJAS
This study was conducted to explore the outcomes of starvation/re-feeding techniques on growth performance, liver antioxidant activities, and histological changes of the gastrointestinal organs of Gansu golden trout. A total of 225 juveniles were divided into 5 treatment groups; the control group (N0) was routinely fed every day while the other groups (N7, N14, N21, and N28) were starved for 7, 14, 21, and 28 days, respectively and after the starvation session, each group was re-fed for 28 days. Compensatory growth was statistically recorded in N14. Weight gain rate and feeding ratio...
Effect of thawing method on bull sperm survival in ejaculates frozen in 4 ml and 8 ml volumesOriginal Paper
Zuzana Biniová, Luděk Stádník, Martina Doležalová, Jaromír Ducháček
Czech J. Anim. Sci., 2018, 63(10):399-407 | DOI: 10.17221/117/2018-CJAS
The aim of this study was to evaluate the effect of different thawing protocols (slow (P1), medium (P2), and fast (P3)) on percentage of motile sperm (MOT) and percentage of sperm cells with intact membranes (INT) in Holstein (4 bulls; 72 samples) and Czech Fleckvieh (4 bulls; 72 samples) semen frozen-thawed in 4 ml and 8 ml volumes. MOT was analysed in fresh semen, as well as immediately after thawing (T0) and 30 min after thawing (T30). INT was analysed using hypoosmotic swelling test (HOS test) in fresh ejaculate (FE), after diluting (DE), and at T0. The differences between FE parameters and frozen-thawed ejaculate parameters, expressing changes...
Claw health and feed efficiency as new selection criteria in the Czech Holstein cattle Krupová Z., Wolfová M., Krupa E., Přibyl J., Zavadilová L.Original Paper
Zuzana Krupová, Marie Wolfová, Emil Krupa, Josef Přibyl, Ludmila Zavadilová
Czech J. Anim. Sci., 2018, 63(10):408-418 | DOI: 10.17221/44/2018-CJAS
The objective of this study was to calculate economic weights for ten current breeding objective traits and for four new traits characterising claw health and feed efficiency in Czech Holstein cattle and to investigate the impact of different selection indices on the genetic responses for these traits. Economic weights were estimated using a bio-economic model, while applying actual (2017) and predicted (2025) production and economic circumstances. For the actual situation, the economic weights of claw disease incidence were -100.1 € per case, and those of daily residual feed intake in cows, breeding heifers, and fattened animals were -79.37,...
Effect of supplementation with two combinations of alternative to antimicrobials by stages on cecal fermentation in rabbitsOriginal Paper
Lihui Liu, Yujing Xu, Xiurong Xu
Czech J. Anim. Sci., 2018, 63(10):419-427 | DOI: 10.17221/121/2017-CJAS
Antimicrobials inhibit cecal fermentation when preventing rabbit from infection. This study aimed to evaluate the effect of supplementation with two combinations of alternative to antimicrobial (combination I: 1 × 109 cfu/kg Bacillus subtilis + 2 g/kg fructooligosaccharide; combination II: 2 g/kg acidifier and 0.6 g/kg essential oil) by stages on rabbit's growth performance and cecal fermentation. Two hundred and forty 15-day-old male kits with similar body weight were distributed randomly to five groups, which were control (basal diet), ZnB (addition of 0.1 g/kg bacitracin zinc in basal diet), II (addition of combination II), I-II...