Czech Journal of Animal Science, 2006 (vol. 51), issue 4
Carcass and meat quality in Brown fattened young bulls: effect of rearing method and slaughter weight
A. CERDEÑO, C. Vieira, E. Serrano, A.R. Mantecón
Czech J. Anim. Sci., 2006, 51(4):143-150 | DOI: 10.17221/3921-CJAS 
Three groups of Brown fattened young bulls were studied, comparing the effects of rearing method (suckled vs. bucket reared) and of slaughter weight (400 vs. 480 kg). Suckled animals had higher fatness scores (2.2 vs. 1.3), more dissectible fat (14.5 vs. 9.1%), and higher intramuscular fat content (7.8 vs. 4.6%DM), accompanied by better scores in sensory tenderness (5.2 vs. 3.8) than did the bucket-reared ones. Animals slaughtered at a heavier weight showed a higher dressing percentage (57.5 vs. 53.8%), conformation score (9.2 vs. 6.2), and fat content (fatness score, dissectible...
Association between aggressive behaviour and high-energy feeding level in beef cattle
Y. Bozkurt, S. Ozkaya, I. Ap Dewi
Czech J. Anim. Sci., 2006, 51(4):151-156 | DOI: 10.17221/3922-CJAS
The aim of this study was to investigate an association between aggressiveness and high level of feeding in a half-open feedlot production system. An experiment was conducted on 72 head of beef cattle of different breeds. The animals were at about 10 months of age. Medium quality silage was offered ad libitum and supplemented with high (HE) and low level (LE) of barley (2.5 and 1.5 kg/day/head, respectively) and supplemented without (nil) or with (+) extracted soybean meal (0.45 kg/day/head). Several types of animal behaviour were observed such as those parameters that are categorized to be main aggressive behaviours, butting, being butted,...
Individual and combined usage of enzyme preparation and heat-treated cereals in pig fattening
M. Domaćinović, Z. Steiner, Đ. Senčić, Z. Antunovic, P. Mijić
Czech J. Anim. Sci., 2006, 51(4):157-162 | DOI: 10.17221/3923-CJAS
In order to reach better production and financial results of pork production different technological ways of pig fattening are researched. The purpose of this paper is to show separate results of polyenzyme application and the results of the use of heat-treated cereals in pig fattening as well as the results of their combined application. Pigs fattened on a diet with polyenzyme preparation and heat-treated cereals, either separately or combined, were characterised by an insignificantly higher growth rate and their feed intake per kilogram of weight gain was low compared to pigs fed standard mixtures (control group). In statistical terms, the relative...
Effect of dietary sodium selenite, Se-enriched yeast and Se-enriched Chlorella on egg Se concentration, physical parameters of eggs and laying hen production
M. Skřivan, J. Šimáně, G. Dlouhá, J. Doucha
Czech J. Anim. Sci., 2006, 51(4):163-167 | DOI: 10.17221/3924-CJAS
ISA Brown laying hens at 24 weeks of age, housed in laying battery cages, were used in this 4-group experiment. One group was fed a basal diet containing primarily maize, soybean meal and wheat. Selenium (Se) content of the basal diet was 0.07 mg/kg dry matter. The other hens received diets supplemented with Na2SeO3, Se-enriched yeast and Se-enriched alga Chlorella, respectively, in a concentration of 0.3 mg Se/kg. The experiment lasted twenty-seven weeks. Egg production, feed consumption, egg weight, physical parameters of egg white, yolk and egg shell were examined every third week and egg white and yolk Se content repeatedly....
The effect of a clinoptilolite-based feed supplement on the performance of broiler chickens
P. Suchý, E. Straková, V. Večerek, Z. Klouda, E. Kráčmarová
Czech J. Anim. Sci., 2006, 51(4):168-173 | DOI: 10.17221/3925-CJAS
The main objective of this research was to verify the effect of feed mixtures supplemented with clinoptilolite-containing ZeoFeed (at a level of 1% and 2%) on the performance traits of broiler chickens in the period of their growth. Experimental results confirmed a positive effect of clinoptilolite on the performance of chickens which was demonstrated by a highly significant increase in the average live weight (P ≤ 0.01) of broiler chickens at 40 days of age. The average live weight of broiler chickens was 2.24 kg (at a dose of 1%) and 2.28 kg (at a dose of 2%) with feed conversion of 1.84 kg (at a dose of 1%) and 1.95 kg (at a dose of...
Artificial stripping and embryonic development of the common gudgeon (Gobio gobio L.) and its use in embryo-larval tests - a pilot study
M. Palíková, R. Krejčí
Czech J. Anim. Sci., 2006, 51(4):174-180 | DOI: 10.17221/3926-CJAS
Artificial reproduction with and without hormonal treatment was performed in females of the common gudgeon (Gobio gobio L.) to assess the suitability of this cyprinid species as a fish model for embryo-larval cytotoxic tests. Considering sperm immobilisation tests, the solution for tench was utilizable. The clearing solution designed for the observation of embryonic development in the European catfish was also found suitable for the common gudgeon embryos. The egg and embryonic mortality, embryonic development, hatching and survival rate were examined. Ovulation occurred in 89% of females after the application of the carp pituitary (5 mg/kg)...