Czech Journal of Animal Science, 2024 (vol. 69), issue 6
Relationship between rib fat thickness and carcass price among different carcass weight groups in Korean native cattleOriginal Paper
Eunjeong Jeon, Sangbuem Cho, Myungsun Park, Sung-Il Ahn, Junior Isaac Celestin Poaty Ditengou, Ki-Beom Kim, Sung-Sub Shin, Nag-Jin Choi
Czech J. Anim. Sci., 2024, 69(6):211-218 | DOI: 10.17221/57/2024-CJAS 
The study assessed the relationship between rib fat thickness and carcass price among different carcass weight groups in Korean native cattle (Hanwoo), taking into account changes in the beef grading system. Data from 8 926 Hanwoo steers, with an average age of 30.6 ± 1.88 months and slaughtered between 2017 and 2019, were analysed. The variables considered included rib fat thickness, carcass weight, eye muscle area, marbling score, and carcass price. Steers were categorised into eight carcass weight groups ranging from 250 kg to 650 kg in the original system, rib fat thickness consistently had a negative impact on carcass price, with partial...
Effects of maize silage withdrawal from finishing ration on weight gain, carcass yield and beef quality of Holstein Friesian × Belgian Blue crossbred bullsOriginal Paper
Tayfun Gündüz, Hayrettin Çayıroğlu
Czech J. Anim. Sci., 2024, 69(6):219-229 | DOI: 10.17221/40/2024-CJAS
This study was practical work in a commercial beef cattle enterprise to offer beef producers different options in a total mixed ration (TMR) design. This study was conducted to determine the effects of withdrawing maize silage from TMR during the finishing period on weight gain, carcass yield and beef quality of meat in beef cattle. Fifty-two Holstein Friesian x Belgian Blue crossbred bulls were used in this study for 126 days. These bulls were divided into four feeding methods described as (i) no maize silage in TMR (C1), (ii) maize silage was withdrawn from TMR two months before slaughter (S1), (iii) maize silage was withdrawn from TMR one month...
Influence of daily feed ration on growth and condition of juvenile pikeperch (Sander lucioperca) reared in a recirculating aquaculture system (RAS)Original Paper
Tomáš Pěnka, Oleksandr Malinovskyi, Jitka Kolářová, Václav Kučera, Tomáš Policar
Czech J. Anim. Sci., 2024, 69(6):230-242 | DOI: 10.17221/33/2024-CJAS
The study tested the effect of daily feed ration (DFR: 0.5%, 0.75%, 1.0%, 1.25%, and 1.5% of fish biomass) on juvenile pikeperch (Sander lucioperca) with an initial body weight of 21.5 ± 5.1 g and total length of 144.5 ± 8.5 mm. The pikeperch were fed floating feed at 8-hour intervals for a duration of 84 days. By the end of the experiment, the group fed DFR of 1.5% exhibited the highest body weight (51.5 ± 16.1 g) and total length (188.2 ± 17.8 mm). The weight heterogeneity, measured as the coefficient of variation (CV), ranged between 30.29 and 33.24%. The specific heterogeneity rate (SHR) ranged from 304.44 to 334.94‰/day....
Comparative study on the large-scale intensive culture of pikeperch (Sander lucioperca) larvae: Evaluation of two different live exogenous food optionsOriginal Paper
Václav Kučera, Tomáš Pěnka, Oleksandr Malinovskyi, Carlos Yanes-Roca, Zhaxygali B. Kuanchaleyev, Tomáš Policar
Czech J. Anim. Sci., 2024, 69(6):243-254 | DOI: 10.17221/42/2024-CJAS
This study is focused on the comparison of production efficiency (growth, survival, and development) and economic evaluation of large-scale larvae culture in pikeperch (Sander lucioperca) using Artemia (Group A) compared to using rotifers and the subsequent combination of rotifers and Artemia (Group R) as a first exogenous feed following weaning and intensive culture of juveniles. Both experimental groups were stocked with the same initial density (100 pcs per litre) of larvae at 4 days post hatching (DPH). Each group was cultured in triplicate until 65 DPH. Assessed parameters included FBW (final body weight), FTL (final total length), SGR (specific...