Czech Journal of Animal Science, 2011 (vol. 56), issue 2
Carcass and meat quality traits of pig reciprocal crosses with a share of Pietrain breed
A. Rybarczyk, A. Pietruszka, E. Jacyno, J. Dvořák
Czech J. Anim. Sci., 2011, 56(2):47-53 | DOI: 10.17221/363/2010-CJAS 
The study was carried out on 119 hybrid grower-finisher pigs that were divided into 5 experimental groups. The analysis covered carcass and meat quality traits of crossbred pigs produced by mating Polish Large White × Polish Landrace crossbred sows with boars of either purebred Pietrain (P) or crossbreds of Line 990 × Pietrain (LP), or Pietrain × Line 990 (PL), or Duroc × Pietrain (DP), or Pietrain × Duroc (PD). The analysis of results which include the effect of the RYR1 gene polymorphism showed that porkers descending from Pietrain boars (P) had a higher meat content in the carcass and a larger loin eye area in comparison with porkers descending...
The effect of different dietary potassium and chloride levels on performance and excreta dry matter in broiler chickens
J. Koreleski, S. Świątkiewicz, A. Arczewska-Włosek
Czech J. Anim. Sci., 2011, 56(2):53-60 | DOI: 10.17221/45/2010-CJAS
The aim of this 3 × 3 factorial experiment on broilers was to investigate the effect of different dietary levels of potassium and chloride on chicken performance, carcass composition and dry matter content in excreta. 360 one-day-old Ross 308 chickens were allocated to 9 groups, in 5 replications of 8 birds (4 ♂ and 4 ♀). Chickens from 1 to 42 days of age were kept in cages with wire floors to enable excreta collection, and were administered water and feed ad libitum. The basal starter (days 1-14) and grower (days 15-42) diet contained in 1 kg, as analysed, 2.11 g and 2.10 g chloride, 8.6 g and 7.8 g potassium and 2.04 g and...
Antioxidant responses and plasma biochemical characteristics in the freshwater rainbow trout, Oncorhynchus mykiss, after acute exposure to the fungicide propiconazole
Z.-H. Li, V. Zlabek, J. Velíšek, R. Grabic, J. Machová, J. Kolařová, P. Li, T. Randák
Czech J. Anim. Sci., 2011, 56(2):61-69 | DOI: 10.17221/35/2010-CJAS
In this study, the toxic effects of PCZ, a triazole fungicide present in aquatic environment, were studied in rainbow trout, Oncorhynchus mykiss, by an acute toxicity test. Compared to the control group, fish exposed to PCZ (96-h-LC50, 5.04 mg/l) showed significantly higher (P < 0.05) plasma NH3 and GLU concentration and the activities of plasma enzymes including CK, ALT, AST, LDH, but the TP content was not significantly different (P > 0.05). The oxidative stress indices (levels of LPO and CP) of brain and muscle in the experimental group were higher compared to the control group, especially for a significant change...
Effect of variable and constant thermal conditions on embryonic and early larval development of fish from the genus Leuciscus (Cyprinidae, Teleostei)
K. Kupren, A. Mamcarz, D. Kucharczyk
Czech J. Anim. Sci., 2011, 56(2):70-80 | DOI: 10.17221/312/2009-CJAS
The aim of this study was to determine the effects of variable and constant thermal conditions on embryonic development of three endangered fish species from the genus Leuciscus. Wild living spawners of dace Leuciscus leuciscus (L.), ide L. idus (L.) and chub L. cephalus (L.) were obtained from rivers belonging to the Pasleka River basin (northeastern Poland) and next transported to a hatchery for the purpose of conducting artificial reproduction. The obtained eggs were fertilized and next incubated under a variety of thermal protocols: slow gradual heating of water (M1), rapid increase in temperature at the end...
Influence of dietary selenium level on the concentration of conjugated linoleic acid isomers, other fatty acids and amino acids in the liver and femoral muscles of rats
M. Czauderna, J. Kowalczyk, K.A. Krajewska
Czech J. Anim. Sci., 2011, 56(2):81-94 | DOI: 10.17221/55/2010-CJAS
The purpose of the present study was to determine the influence of diets containing conjugated linoleic acid isomers (CLAmix) with or without low (LSe) or high (HSe) concentration of selenised yeast (SeY) on body weight gain (BWG), feed conversion efficiency (FCE), and concentrations of CLA isomers and other fatty acids (FA) in the liver and femoral muscle of rats. The investigation was performed on 48 female rats (Wistar, Hsd Brl Han: WIST), aged 8 weeks with an initial body weight of 195.7 ± 0.8 g. After one week of submaintenance feeding, for 6 weeks the rats were fed ad libitum the Labofeed H diet supplemented...