Czech Journal of Animal Science, 2004 (vol. 49), issue 10

Single nucleotide polymorphism (SNP) in the 5'-noncoding region of the bovine growth hormone receptor gene and its association with dairy production traits in Polish Black-and-White cattle

A. Maj, N. Strzałkowska, K. Słoniewski, J. Krzyżewski, J. Oprządek, L. Zwierzchowski

Czech J. Anim. Sci., 2004, 49(10):419-429 | DOI: 10.17221/4327-CJAS  

The effects of cow's genotype for growth hormone receptor (GHR) were determined on milk production traits of the Polish Black-and-White (BW) cattle. It was shown that GHR genotypes significantly influenced most of the dairy traits studied. Cows of the RFLP-NsiI -/- genotype of GHR produced more milk with higher content of milk components, including fat, protein, and lactose than those with +/+ genotype. The heterozygous +/- genotype at RFLP-AccI appeared superior with respect to two milk composition parameters - gross energy and total solids. The combined GHR genotypes (CGGs) 2213 and 1113 were...

Farm animal genetic resources in the Slovak Republic

M. Oravcová, J. Huba, L. Hetényi, J. Bulla, V. Mátlová, O. Kadlečík

Czech J. Anim. Sci., 2004, 49(10):430-435 | DOI: 10.17221/4328-CJAS  

At present, farm animal genetic resources are used to a various extent and with different objectives inSlovakia. The use of highly productive breeds or hybrids aimed at profitable and competitive production prevails. To a smaller extent, breeds that are a part ofSlovakia's and world cultural heritage are kept. The improvement of these breeds for high production or reproduction traits is not a priority. Diversity of farm animals is viewed through the variety of species and breeds used for production of food for people and, also, through the variety of production systems in livestock. Within livestock species, populations of cattle, sheep, goat, pig...

Influence of L-lactic acid on the efficacy of microbial phytase in broiler chickens

P. Zobač, I. Kumprecht, P. Suchý, E. Straková, J. Brož, J. Heger

Czech J. Anim. Sci., 2004, 49(10):436-443 | DOI: 10.17221/4329-CJAS  

Two growth trials and a short-term metabolism trial were conducted in broiler chickens in the period of 22 to 42 days of age in order to evaluate the effects of two dietary levels of L-lactic acid (1.03 or 2.06 g/kg) and microbial 6-phytase (750 U/kg), added either separately or in combination, on growth rate, feed conversion, dressing percentage and utilization of selected nutrients. In the first growth trial, six different dietary treatments were added to a basal grower diet containing 19.4% crude protein and a reduced level of dietary phosphorus (P) (5.9 g total and 2.9 g non-phytate P per kg). Single administration of L-lactic acid did not show...

Intensive rearing of the nase Chondrostoma nasus (L.) larvae using dry starter feeds and natural diet under controlled conditions

P. Spurný, J. Fiala, J. Mareš

Czech J. Anim. Sci., 2004, 49(10):444-449 | DOI: 10.17221/4330-CJAS  

We performed intensive rearing of larvae of the nase Chondrostoma nasus (L.) in a feeding experiment until 21 days from the initiation of exogenous nutrition under laboratory conditions at a temperature 26°C. Two dry starter feeds (a feed for salmonids and a starter feed of the artificialplanktontype)differinginthecompositionof nutrients (50% and 60% of proteins, 12% and 16% of fat, respectively) and natural food (Artemia salina nauplii) were used. Cumulative survival rate, individual weight (w), total length (TL), specificweightgrowthrate(SWGR),specificlengthgrowthrate(SLGR)andconditionfactor(CF)wereassessed.One-wayanalysisofvariance(ANOVA)was...

Littoral 0+ fish assemblages in three reservoirs of the Nové Mlýny dam (Czech Republic)

P. Jurajda, J. Regenda

Czech J. Anim. Sci., 2004, 49(10):450-457 | DOI: 10.17221/4331-CJAS  

A synchronous study of 0+ juvenile fish in three lowland reservoirs (Mušov, Věstonice, Nové Mlýny) of the Nové Mlýny dam (Czech Republic) was conducted in July 1997. Fish were sampled by fry beach seine and backpack electro fishing gear at 32 sites in three types of inshore habitats: concrete stepped embankment, stony rip-rap and sandy-gravel beach. In total, we registered 0+ juvenile fish of 17 species and one hybrid. The most common species was bleak Alburnus alburnus (62.7%), followed by roach Rutilus rutilus (12.8%), ide Leuciscus idus (6.2%) and asp Aspius aspius (5.5%). More than 53% of 0+ fish samples were...

Assessment of metal contamination in the upper reaches of the Tichá Orlice River

Z. Svobodová, O. Čelechovská, J. Kolářová, T. Randák, V. Žlábek

Czech J. Anim. Sci., 2004, 49(10):458-464 | DOI: 10.17221/4332-CJAS  

The aim of the present study was to assess metal contamination in the same reaches of the river, and thus to help explain unsatisfactory reproduction results in the reproduction of salmonoid fish. The contamination assessment was based on measuring metal concentrations in the brown trout (Salmo trutta morpha fario) and some bottom sediment samples. The samples were collected in June 2000 and 2001 at two collection sites from theTicháOrliceRiver (Červená Voda - 103rd river km; Lichkov - 93rd river km) and its tributary Kralický Brook (100th river km). At each of the sites, 14 brown trouts were collected in each of the periods of monitoring....