Czech Journal of Animal Science, 2009 (vol. 54), issue 11

Effect of essential and non-essential amino acid addition to a nitrogen-free diet on endogenous ileal amino acid flow in growing pigs

P. Dolešová, S. Nitrayová, P. Patráš, J. Heger

Czech J. Anim. Sci., 2009, 54(11):475-480 | DOI: 10.17221/63/2009-CJAS  

Pigs fitted with ileal T-cannula in the terminal ileum were used to study the effect of synthetic amino acids (AA) added to a nitrogen-free diet on endogenous losses. We compared the obtained data with data from other research centres in the world that are focusing on these problems. In the present experiment, we used three synthetic diets - a nitrogen-free (NF) diet, a diet with added essential AA (E), a diet with the same amounts of essential AA and a mixture of non-essential AA (E+N) added. The diets, apart from the amount of AA, had the same composition. Chromium oxide was used as an indigestible marker. The supplementation of the NF diet with...

Effects of protein-free energy supplementation on blood metabolites, insulin and hepatic PEPCK gene expression in growing lambs offered rice straw-based diet

X.D. Zhang, W.J. Chen, C.Y. Li, J.X. Liu

Czech J. Anim. Sci., 2009, 54(11):481-489 | DOI: 10.17221/1763-CJAS  

This study was conducted to investigate the effects of increasing levels of protein-free energy supplementation on blood glucose, urea nitrogen, insulin and gene expression of hepatic phosphoenolpyruvate carboxykinase (PEPCK) in growing lambs offered rice straw-based diet. Thirty-six male Hu lambs (3.5 months old) were divided into four equal groups according to body weight. All animals were fed rice straw ad libitum and supplemented with cornstarch at levels of 0 (control), 60, 120, and 180 g/day, respectively, along with 160 g/day of rapeseed meal. The trial lasted for 60 days with the first 15 days for adaptation. Body weight change and feed...

The meat quality of layer males from free range in comparison with fast growing chickens

M. Lichovníková, J. Jandásek, M. Jůzl, E. Dračková

Czech J. Anim. Sci., 2009, 54(11):490-497 | DOI: 10.17221/3/2009-CJAS  

: In chick hatcheries, males of laying hybrids are considered to be "waste" and the majority of these males are killed just after hatching. On the other hand, the interest of consumers in products from alternative systems (organic, free-range) is increasing. The idea was to evaluate the meat quality of these males when they have access to free range because there is not such a study available. The aim of this study was to compare the physical and sensory quality of the meat of layer males with fast-growing broilers at the same age when they had both access to free range and when they were fed to 49 and 90 days of age. Slow-growing ISABROWN (IB) layer...

The error associated with the prediction of digestible protein contents of fish diets from tabulated values

J. Sales

Czech J. Anim. Sci., 2009, 54(11):498-509 | DOI: 10.17221/65/2009-CJAS  

Numerous species available for culture, and lengthy, tedious and demanding digestibility experiments necessitate the use of tabulated values to calculate the apparent digestible nutrient contents of compound fish diets. The error associated with the above practice was evaluated in the present study with the use of apparent protein digestibility coefficients (APDCs) and dietary crude protein (CP) contents obtained in independent studies on fish nutrition. Prediction of APDCs of 21 compound diets evaluated in 18 studies with rainbow trout (Oncorhynchus mykiss), by using APDCs of 27 individual feed ingredients determined for this fish species,...

The effect of transport on biochemical and haematological indices of common carp (Cyprinus carpio L.)

R. Dobšíková, Z. Svobodová, J. Bláhová, H. Modrá, J. Velíšek

Czech J. Anim. Sci., 2009, 54(11):510-518 | DOI: 10.17221/52/2009-CJAS  

The effect of 12 h transport on the biochemical and haematological profiles of three-years-old common carp was investigated. There was a significant increase (P < 0.01) in ammonia, chloride, phosphorus, lactate dehydrogenase, aspartate aminotransferase and creatine kinase, and a significant decrease (P < 0.05) in total proteins. The levels of glucose (P < 0.01), lactate (P < 0.05), alanine aminotransferase (P < 0.01) and calcium (P < 0.01) were also significantly changed, but no time-dependent relationships were found. Significant increases in haematocrit (P < 0.01) and metamyelocyte...