Czech Journal of Animal Science, 2006 (vol. 51), issue 3
Effects of high air temperatures on milk efficiency in dairy cows
J. Brouček, Š. Mihina, Š. Ryba, P. Tongeľ, P. Kišac, M. Uhrinčať, A. Hanus
Czech J. Anim. Sci., 2006, 51(3):93-101 | DOI: 10.17221/3915-CJAS 
26 herds with 71 586 individual records were used. We tested a hypothesis that milk efficiency was influenced by the elevation of the farm, housing system, breed, area of altitude, and by the cooling of dairy cows. There were 20 herds from lowlands and 6 herds from mountains, 20 herds from free-stall housing, 6 herds from tie-stall housing. 8 herds consisted of Slovakian Pied cattle, 4 herds of Red Holstein cattle, 11 herds of Black-Pied Lowland cattle and 3 herds of Slovakian Pinzgau cattle. The herds were divided into 4 groups according to the nearest meteorological station, and they were distributed according to the type of cooling. 10 herds were...
Factors contributing to the incidence and prevalence of lameness on Czech dairy farms
I. Dembele, M. Špinka, I. Stěhulová, J. Panamá, P. Firla
Czech J. Anim. Sci., 2006, 51(3):102-109 | DOI: 10.17221/3916-CJAS
Twenty-four Czech dairy farms were visited to record lameness prevalence and to identify factors associated with high lameness prevalence at the farm level and/or increased lameness risk at the level of individual cows. All cows were checked for lameness and forty cows per farm were examined for overgrown claws, body dirtiness and skin lesions. The farm environment was scored between 1 (excellent) to 5 (very poor) in three different aspects: floor slipperiness, cow care quality, and housing quality. Data on hoof trimming schedules were obtained from farm managers. Lameness prevalence on farms was in a wide range from 6% to 42% (median 22%). At the...
The determination of growth in Akkeci (White goat) female kids by various growth models
A. Kor, E. Baspinar, S. Karaca, S. Keskin
Czech J. Anim. Sci., 2006, 51(3):110-116 | DOI: 10.17221/3917-CJAS
This study aimed to determine the growth of 26 Akkeci (White goat = Saanen × Kilis (Bi) crossbreed) female kids by measuring their body weight, withers height, body length, heart girth depth, heart girth width, heart girth circumference, leg circumference and volume index in two-week intervals from birth to 500 days of age and by using different growth models (Monomolecular, Gompertz, Weibull and Richards). An approximate volume index was calculated by multiplying the values of heart girth depth, body length and heart girth width. The best one among these models was determined in respect of RMS (square root of Residual Means Squares which is calculated...
Linseed oils with different fatty acid patterns in the diet of broiler chickens
J. Zelenka, D. Schneiderová, E. Mrkvicová
Czech J. Anim. Sci., 2006, 51(3):117-121 | DOI: 10.17221/3918-CJAS
The effect of 1, 3, 5 or 7% of linseed oil on the performance and content of nutrients in meat was studied in an experiment with broiler chickens from 25 to 40 days of age. Oils made either of seeds of the cultivar Atalante (A; groups A1; A3; A5; A7) with a high content of α-linolenic acid or of the cultivar Lola (L) with a predominating content of linoleic acid (L1; L3; L5; L7) were used. The diets were formulated to maintain a constant energy/protein ratio. As compared with the groups receiving 1% and 3%, body weight gains were higher in the groups receiving 5% and 7% of oils in the feed mixture (P < 0.01). A lower feed consumption...
Comparison of performance and digestibility characteristics of broilers fed diets containing treated hulled barley or hulless barley
A. Moharrery
Czech J. Anim. Sci., 2006, 51(3):122-131 | DOI: 10.17221/3919-CJAS
This study was performed with growing chickens (14 to 56 days of age) to evaluate the effects of feeding a barley-based diet. The treatments were maize diet (1) as a control, barley diet with (4) or without (2) the commercial enzyme β-glucanase, barley treated with rumen fluid without protozoa (3) and hulless barley (5). The effects of treatments were investigated in a 42-day trial using 360 sexed broiler chickens. In a digestibility trial, 15 male broiler chicks were used at 45 days of age. In this regard, five treatments were offered to chickens in three replications individually. The experimental design for performance investigation was a completely...
Artificial propagation of female Hungarian strain 7 carp (Cyprinus carpio) after treatment with carp pituitary homogenate, Ovopel or Dagin
E. Brzuska
Czech J. Anim. Sci., 2006, 51(3):132-141 | DOI: 10.17221/3920-CJAS
The effects of reproduction were investigated in carp females of the Hungarian strain 7 whose ovulation was stimulated with carp pituitary homogenate (0.3 + 2.7 mg/kg; group I), Ovopel (1/5 + 1 pellet/kg; group II) or Dagin (1 dose/kg; group III). The least-squares means calculated for the weight of eggs expressed in grams show that eggs of the highest weight were given by females treated with Ovopel and those of the lowest weight by females treated with carp pituitary homogenate (1 047.65 g and 769.28 g, respectively). For this parameter a statistically significant (P ≤ 0.05) difference was found between the means of group I and II and...