Czech Journal of Animal Science, 2025 (vol. 70), issue 5
Effect of polyphenol-rich oil palm empty fruit bunch extract on in vitro rumen fermentation, fatty acid profile and microbial populationOriginal Paper
Nur Liyana Akmal Harun, Anjas Asmara Samsudin, Awis Qurni Sazili, Yong Meng Goh
Czech J. Anim. Sci., 2025, 70(5):161-172 | DOI: 10.17221/180/2024-CJAS 
The aim of this study was to evaluate the effect of oil palm empty fruit bunch (OPEFB) extract on in vitro rumen fermentation, fatty acid profile, and microbial population. Rumen fluid was obtained from three female dairy goats fed a similar diet of 60% Napier grass and 40% commercial pellets. The substrate used for the fermentation was a Napier grass and commercial pellet mixture (60 : 40 in dry matter) and the treatment diets were: CON (substrate without OPEFB extract), OPEFB-5 (substrate with 5% of OPEFB extract), OPEFB-10 (substrate with 10% of OPEFB extract). The characteristics of rumen fermentation including pH, fermentation...
Genetic diversity and population structure of a Creole sheep flock from UruguayOriginal Paper
Beatriz Carracelas, Pablo Peraza, Brenda Vera, Silvia Llambi, Gabriel Ciappesoni
Czech J. Anim. Sci., 2025, 70(5):173-182 | DOI: 10.17221/93/2024-CJAS
Since 2020, the National Agricultural Research Institute (INIA) has conserved a Creole sheep flock at INIA Las Brujas. This study genetically characterised this population and compared it with six others: San Miguel National Park Creoles, commercial farms Creoles, Brazilian Creoles, Corriedale, Merilin and Soay sheep. The analysis included 628 individuals and 31 392 autosomal SNPs. Soay and San Miguel National Park Creoles exhibited the lowest genetic diversity (Ho = 0.266 and 0.279) and highest inbreeding (FHOM: 0.283 and 0.249; FROH: 0.199 and 0.202). Merilin and Corriedale showed the highest genetic diversity (Ho = 0.351...
Different particle sizes of laying hens diets and it’s effect on blood biochemical parameters, ileal digesta viscosity and nitrogen retentionOriginal Paper
Ondřej Šťastník, Dana Zálešáková, Jakub Novotný, Vojtěch Kumbár, Andrea Roztočilová, Eva Mrkvicová, Leoš Pavlata
Czech J. Anim. Sci., 2025, 70(5):183-193 | DOI: 10.17221/11/2025-CJAS
The aim of this work was to evaluate the effect of different particle sizes of hens diets on blood biochemical parameters, ileal digesta viscosity and nitrogen retention. In the experimental part, the effects of different physical structure were investigated on two groups of laying hens of the Bovans Brown hybrid from 76 to 80 weeks of age. A finely ground mash diet [geometric mean diameter (GMD), 632 µm] and a coarsely ground mash diet (GMD, 1 258 µm) with the equal nutritional content were used. In the experiment, the particle sizes of the feed mixtures were analysed and compared with the particle size of unaccepted feed residues using...
Effects of two protein levels on the performance of chicken males with different growth intensitiesOriginal Paper
Jan Tyl, Eva Tůmová, Darina Chodová
Czech J. Anim. Sci., 2025, 70(5):194-201 | DOI: 10.17221/44/2025-CJAS
At present, genetic selection programs produce chicken genotypes with different growth intensities, which might have variable requirements for dietary protein. The objective of this study was to compare the response of three different genotypes to two levels of crude protein in feed mixtures. Cockerels of fast-growing Ross 308, medium-growing Hubbard JA 757 and slow-growing ISA Dual chickens were used in the study. Each genotype was fed diets that differed in protein level: the control group (C) received commercial feed, and the experimental group was fed a diet with a 6% lower protein content (LP). The daily weight gain (DWG) and feed conversion ratio...