Czech Journal of Animal Science, 2006 (vol. 51), issue 11
Adult steers for beef production: breed effect on animal performance, retail yield and carcass quality
C. Vieira, A. CERDEÑO, E. Serrano, A.R. Mantecón
Czech J. Anim. Sci., 2006, 51(11):467-474 | DOI: 10.17221/3966-CJAS 
The production of adult steers for beef could be a profitable use of the territory in some mountain areas in the south of Europe, where this production is nearly inexistent, owing to an increase in the demand for meat from adult animals in specialized markets. The objective of this study was to evaluate the profitability of beef production in three breeds adapted to these areas but varying greatly in their mature size. The studied breeds were a specialized meat breed Limousin, a dual-purpose breed - Brown Swiss breed and - a Spanish local breed Asturiana de los Valles. Higher growth rates (P < 0.05) and higher carcass weights (P <...
Influence of dietary linseed and sunflower oil on sensory characteristics of rainbow trout (Oncorhynchus mykiss)
Z. Drobná, J. Zelenka, E. Mrkvicová, D. Kladroba
Czech J. Anim. Sci., 2006, 51(11):475-482 | DOI: 10.17221/3967-CJAS
This study describes the effects of dietary linseed and sunflower oil on the sensory characteristics of rainbow trout (Oncorhynchus mykiss) fillets. Rainbow trout were fed a diet containing either 2.5% or 5% of linseed or sunflower oil or 5% mixture of both oils (2.5% of each). Control group received a commercial feed mixture. A selected and trained panel carried out descriptive sensory tests on fish fillet cross-sections. The addition of vegetable oil into fish feed did not affect firmness, juiciness or intensity of total taste but had a significant impact on colour, intensity of odour and fish oily taste. A higher content of n-3 polyunsaturated...
Factors affecting milk yield and ewe's lactation curves estimated with test-day models
M. Oravcová, M. Margetín, D. Peškovičová, J. Daňo, M. Milerski, L. Hetényi, P. Polák
Czech J. Anim. Sci., 2006, 51(11):483-490 | DOI: 10.17221/3968-CJAS
Test-day records of purebred Tsigai, Improved Valachian and Lacaune ewes were analysed with a general linear model in order to investigate the effects of flock-test day, lactation number, days in milk, litter size and month of lambing. In total, 121 576 (Tsigai), 247 902 (Improved Valachian) and 2 196 (Lacaune) test-day records gathered over the period 1995-2005 were included in the analyses. Average daily milk yields were 0.604 ± 0.279 kg (Tsigai), 0.595 ± 0.243 kg (Improved Valachian) and 1.053 ± 0.475 kg (Lacaune). The significant (P < 0.05) or highly significant (P < 0.01) effects of flock-test day,...
The use of treated rape cake in a calf starter diet
E. Göpfert, M. Trčková, R. Dvořák
Czech J. Anim. Sci., 2006, 51(11):491-501 | DOI: 10.17221/3969-CJAS
The objective of the experiment was to evaluate the effect of starter diet containing 10% of treated rape cake (TRC) with a reduced glucosinolate content on calf growth, development and health. The experiment included 45 calves allocated into 3 groups. After the colostrum period (5 days) the calves were fed 4 l of pooled fresh milk per calf/day and one of the starters ad libitum. The control group (S) was fed Standard starter with components with a standard nutrient content including fibre. Comparative group T was fed Telstar starter, which contained whole maize kernels and protein pellets. Experimental group G was fed Grant starter containing...