Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 2010 (vol. 58), issue 4
Vplyv rastlinných silíc na parametre a mikrobiologickú kvalitu vnútorného obsahu vajec nosníc
The influence of the plant essential oils on internal qualitative parameters and microbiological indicators of hens eggs content
Henrieta Arpášová, Mária Angelovičová, Miroslava Kačániová, P. Haščík, Martin Mellen, J. Čuboň, Stanislav Kráčmar
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 13-22 | DOI: 10.11118/actaun201058040013 
Essential oils are aromatic oily liquids obtained from plant material (flowers, buds, seeds, leaves, twigs, bark, herbs, wood, fruits and roots). Besides antibacterial properties, essential oils or their components have been shown to exhibit antiviral, antimycotic, antitoxigenic, antiparasitic, and insecticidal properties. In this experiment the effects of supplementation of the diet for laying hens with thyme and hyssop essential oils on physical and microbiological egg parameters were studied. Hens of laying hybrid ISA Brown (n = 72) were randomly divided at the day of hatching into 3 groups (n = 26) and fed for 41 weeks on diets which differed in...
Začátek a trvání vegetativních fenologických fází u buku lesního (Fagus sylvatica L.) v měnících se podmínkách prostředí
The onset and duration of vegetative phenological stages in European beech (Fagus sylvatica L.) under changing conditions of the environment
Emilie Bednářová, Jiří Kučera, Lucie Merklová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 23-30 | DOI: 10.11118/actaun201058040023
A phenological study on the onset and duration of particular phenological stages of European beech (Fagus sylvatica L.) was carried out using sample trees growing in a research area of the Faculty of Forestry and Wood Technology, MENDELU Brno for a period of 17 years (1991-2007). The paper describes the onset and duration of particular phenological stages depending on effective temperatures. In spring phenological stages, the high dependence was proved on air temperatures. To evaluate temperature requirements of studied species the cumulative sum of temperatures which activated the beginning of a respective phenological stage was used. It is...
VLIV ZPŮSOBU DOKONČENÍ NÁBYTKOVÝCH DÍLCŮ NA MNOŽSTVÍ EMISÍ VOC
Influence of way of finishing furniture segments on amount emissions VOCs
Petr Čech
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 31-40 | DOI: 10.11118/actaun201058040031
The study deals with the influence of way of finishing furniture segments on amount emissions VOCs (volatile organic compounds).The so-called Volatile Organic Compounds (VOC) are among the largest pollution sources of both the internal and external environments.VOC is defined as emission of any organic compound or a mixture thereof, with the exception of methane, whereby the compound exerts the pressure of 0.01 kPa or more at the temperature of 20 °C (293.15 K) and reaches the corresponding volatility under the specific conditions of its use and can undergo photochemical reactions with nitrogen oxides when exposed to solar radiation.The...
REOLOGICKÉ CHARAKTERISTIKY MÚK VYMLETÝCH Z ODLIŠNÝCH ODRÔD POTRAVINÁRSKEJ PŠENICE (Triticum aestivum L.)
Rheological characteristics of flours milled from different wheat varieties (Triticum aestivum L.)
Ladislav Haris, Boris Žitný, Zdenka Muchová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 41-48 | DOI: 10.11118/actaun201058040041
Technological quality was studied of wheat flours from three varieties of Triticum aestivum L. (Arida, Meritto, Verita) delivered to the mill for three years (2007-2009). Physico-chemical parameters observed during the purchase of grain (STN 461100-2) were not significantly different. Also milled flours from tested varieties have by processors required ash content, gluten, acceptable Zeleny index, α-amylase activity (falling number), but as the rheological properties of dough from these flours show, these parameters are unsuited enough (un)suitability of material for efficient processing of flour. Rheological evaluation showed that each...
TEPELNÁ A MECHANICKÁ ODOLNOST ZINKOVÉHO POVLAKU
Heat and mechanical resistance of zinc coating
Karel Horák, Michal Černý, Josef Filípek, Martin Fajman
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 49-56 | DOI: 10.11118/actaun201058040049
The article is aimed at studying the effect of temperature on structure of intermetallic phases of the protective zinc layer. The main objective of the article is a description of the structure and the changes that can occur during the heating process. The first part of the article deals with the description of the structure and mechanical properties of the interfacial phases and their arrangement. The main part of the article is aimed at study of brittle intermetallic phases, which arise due to increased temperature. For this reason, a set of samples of steel CSN 11 321 (DC01) was prepared. These samples were subjected to thermal heating in the tempering...
Diverzita střevlíkovitých (Carabidae) na různých sukcesních stadiích vápencového lomu Hády (Brno, Česká republika)
Species diversity of Carabidae (Coleoptera) in different succession stages of a limestone quarry Hády (Brno, Czech republic)
Vladimír Hula, Pavla Šťastná
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 57-64 | DOI: 10.11118/actaun201058040057
Carabid beetle samples were obtained from pitfall traps at an abandoned quarry of a limestone massif Hády near Brno. The samples were collected each month between April and September in years 2007-2008. A total of 61 species were registered and represented by 2619 individuals. Similarity of individual areas was evaluated by using the Cluster analysis - the most significant similarity was found in reclaimed sites (99.87%) and control sites (90.52%). The difference in similarity between two observed years came out distinctively (F = 2.906; P = 0.0010). Three species (Cylindera germanica, Licinus cassideus and Aptinus bombarda) from...
SLEDOVÁNÍ FTALÁTŮ VE TKÁNÍCH KUŘAT V ZÁVISLOSTI NA JEJICH OBSAHU V KRMIVU
Monitoring phthalates in the tissues of broiler chicks with feedstuffs different phthalate contents
Alžbeta Jarošová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 65-72 | DOI: 10.11118/actaun201058040065
For the monitoring of distribution and accumulation of phthalic acid esters (PAE) in animal tissues, samples of muscle, mesenteric fat (fat), skin and liver from broiler chicks ROSS 308 were used. The chicks were divided into 4 groups (50 chicks each). All the chicks were given commercial diets (complete feed, KKS) for broiler chicks (starter - BR1; grower - BR2 and finisher - BR3). The experimental diets were supplemented with vegetable oil (RO) with low (group N) or high (group V) phthalate contents, or animal fat with a high phthalate content (group Z). Neither the control diets (K), nor the grower (BR1) diets contained vegetable oils or animal...
Stanovení mikroskopických hub z ořechů, listí, kůry a pylu kaštanovníka jedlého (Castanea sativa Mill.)
The determination of microscopic fungi from Chestnut (Castanea sativa Mill.) fruits, leaves, crust and pollen
Miroslava Kačániová, Janka Sudzinová, Miriam Kádasi-Horáková, Magdaléna Valšíková, Stanislav Kráčmar
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 73-78 | DOI: 10.11118/actaun201058040073
The plant-microbial interactive relations with respect to determination of the mycoflora of the Castanea sativa Mill. nuts, crust, leaves and pollen and their effect on the host organism in four Slovak regions were studied. In the experiments were isolated 7 genera and 10 species of microscopic fungi from the nut, crust and leaves. It was found, that isolates from the Castanea sativa Mill. pollen were represented by 8 genera and 11 species of microscopic fungi. Alternaria, Cladosporium, Mucor and Rhizopus appeared to be the most frequently occurring genera of nuts, leaves and crust. Acremonium, Alternaria,...
Cytokininy a polární transport auxinu v axilárních pupenech hrachu
Cytokinins and polar transport of auxin in axillary pea buds
Petr Kalousek, Dagmar Buchtová, Jozef Balla, Vilém Reinöhl, Stanislav Procházka
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 79-88 | DOI: 10.11118/actaun201058040079
The influence of cytokinin on auxin transport during release of axillary buds from apical dominance was studied. Expression of auxin-carrier coding genes PsAUX1 (AUXIN RESISTANT 1) and PsPIN1 (PIN-FORMED 1) was explored in axillary buds of the 2nd node of 7-day pea plants (Pisum sativum L.) cv. Vladan after decapitation or after exogenous application of benzyladenine (6-benzylaminopurine) onto axillary buds of intact plants. Localization of the PsPIN1 protein, the key factor for polar transport of auxin in axillary buds, was visualised by immunohistochemistry. After exogenous application of cytokinin the...
Mobilní využití digitálních geografických dat v prostředí Apple iPhone
Mobile usage of digital geographical data in the Apple iPhone device
Jiří Kamínek, Martin Klimánek
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 89-96 | DOI: 10.11118/actaun201058040089
This article deals with the possible deployment of the Apple iPhone device as mobile geoinformation technology. An examination of the possibilities of the device, the development tools and the Web Mapping Service (WMS) was followed by developing a prototype of an application called WhateverMap. The application uses maps from the WMS, which are available in the field through mobile data communication. The application interface was designed around the User Experience model so that its control is easy to grasp and intuitive. It also features support to the determination of the current location. To make working with the application more comfortable it...
Změny prostředí lesa a biodiverzity v ekosystému smrku s holosečnou obnovou na původním stanovišti buku
The changes of the forest environment and biodiversity in a Norway spruce ecosystem with clearcutting regeneration on the original beech site
Emil Klimo, Alois Prax, Vítězslav Hybler, Jan Štykar
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 97-122 | DOI: 10.11118/actaun201058040097
The subject of the Rájec project (the Drahanská vysočina Upland) consists in the analysis of ecological impacts of intensive management in spruce monocultures growing on original sites of beech. Long-term studies were aimed at particular stand and environment stages after clear-felling regeneration and at the origin of a spruce monoculture of the 2nd generation. The establishment of the spruce monoculture can be considered to be most important. The highest attention was paid to the monoculture both from the aspect of carbon and nitrogen in particular components of the forest stand and their transport processes as well as from the aspect...
Fyzikální a mechanické vlastnosti subfosilního dubového dřeva
Physical and mechanical properties of subfossil oak (Quercus, sp.) wood
Tomáš Kolář, Michal Rybníček
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 123-134 | DOI: 10.11118/actaun201058040123
The paper deals with the examination of physical and mechanical properties of subfossil wood of oak (Quercus, sp.). The issue of establishing physical and mechanical properties of subfossil oak wood has not yet been addressed in the area of the Czech Republic. The main objective is to find out what changes to subfossil wood properties have occurred in comparison with recent wood. For these purposes, samples from three locations were taken (gravel pit Tovačov - district Přerov, gravel pit Kostomlátky - district Nymburk, and the Bečva basin near Osek nad Bečvou). All of the selected properties were tested in compliance with relevant valid Czech...
VYHODNOCENÍ INDEXU PŘEDCHOZÍCH SRÁŽEK U VYBRANÝCH KLIMATOLOGICKÝCH STANIC
Antecedent precipitation index evaluation at chosen climatological stations
Silvie Kozlovská, František Toman
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 135-140 | DOI: 10.11118/actaun201058040135
The water retention capacity of a landscape, usually measured for a catchment basin, is a very important and decisive characteristic to identify the runoff amount from the catchment area and, in consequence, for antierosion and flood protection measures. Besides, creating water reserves in the landscape and keeping the water in them is also rather important.Soil humidity contributes to the calculation of potential water retention through modelling the runoff amount and peak discharge from the catchment basin within an area not larger than 5-10 km2. This method is based on curve number values (CN), which are tabulated according to hydrological...
DEFINOVÁNÍ SOUHRNNÉ CHARAKTERISTIKY PRO VEMENO U ČESKÉHO STRAKATÉHO SKOTU
Definition of the overall udder score for the Czech Fleckvieh Cattle
Josef Kučera, Tomáš Kopec, Tao Yong, Oto Hanuš, Jaroslav Kopecký
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 141-148 | DOI: 10.11118/actaun201058040141
Based on the linear type classification of 49 246 young cows of the Czech Fleckvieh breed the overall udder score was proposed. Calculation of the overall udder score is derived from the particular type traits, especially from those traits, where the optimal development is not scored by maximum. Cubic regression coefficients were used for recalculation and obtained a new scale for traits such as udder depth, teat length, teat thickness, teat position and teat placement. These re-calculated traits together with other particular traits described on the udder were combined to the model for overall udder score - model 1. In the model 2 the same proportion...
Revitalizační vápnění a reakce půdní fauny
Revitalization liming and the response of soil fauna
Emanuel Kula
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 149-158 | DOI: 10.11118/actaun201058040149
In an area with the differentiated extend of revitalization liming (1986-2002), soil fauna (Elateridae, Staphylinidae, Diplura, Protura) determined through the method of tullgrens (2005) was confronted with the actual soil chemistry (pH, soil exchange sorption, the degree of the sorption complex saturation by basic cations, C/N ratio, available nutrients P, Mg, K and Ca).Athous subfuscus (O. F. Müller) and Dalopius marginatus (L.) accepted the broad extent of soil pH (2.8-6.15). The abundance of Elateridae and Protura was affected by soil chemistry and the content of nutrient elements while Staphylinidae and Diplura were without any...
HYDROBIOLOGICKÁ STUDIE STŘEDNÍHO TOKU BEČVY
Hydrobiological study of the middle course of the Bečva River
Leo Mackovík, Ivo Sukop, Miloš Holzer, Petr Spurný
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 159-166 | DOI: 10.11118/actaun201058040159
The present work gives the results of the hydrobiological research of the middle course of the Bečva River in the river section between Valašské Meziříčí and Přerov, carried out in the years 2004 to 2007. Altogether, 65 taxa of macrozoobenthos were determined in the period 2000-2007 in the middle course of the Bečva River : Coelenterata (1 taxon), Oligochaeta (5 taxa), Hirudinea (3 taxa), Gastropoda (4 taxa), Isopoda (1 taxon), Amphipoda (2 taxa), Hydracarina (1? taxon), Ephemeroptera (7 taxa), Plecoptera (1 taxon), Odonata (3 taxa), Heteroptera (1 taxon), Megaloptera (1 taxon), Trichoptera (9 taxa), Coleoptera (3 taxa), Diptera (23 taxa). The number...
Vliv projektu vodního kanálu DOL na geobiocenózy lužních lesů (Česká republika)
The influence of the Danube-Odra-Elbe water canal project on the geobiocoenoses of floodplain forests (Czech Republic)
Ivo Machar
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 167-176 | DOI: 10.11118/actaun201058040167
This arcticle deals with influence of the proposed Danube-Odra-Elbe (DOL) water canal on the floodplain forests in the Czech Republic. The project of the DOL water canal is evaluated with using GIS methods and reference assessment of environmental effects. Biogeographic differentiation of the landscape in a biogeocenological concept have been also utilized in this paper. The presented paper has shown the possibilities of use of the GIS analysis for the assessment of the assumed effect of the DOL project on the hydrological regime of floodplain forests. It has been proven that this method is much more efficient in objectivizing the presupposed influences...
Drcení zpražených zrn kávy Arabica
Crushing of roasted Arabica coffee beans
Šárka Nedomová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 177-182 | DOI: 10.11118/actaun201058040177
Paper deals with experimental research on the crushing of coffee beans of different kinds under quasi-static compression. The process of the crushing is described in details. It has been shown that there is variability in the crushing strength values. A relation between crushing strength and the coffee grain shape is also studied. Roasted Arabica coffee (Coffea arabica) beans were used for analyses. Arabica coffees were produced in Colombia and Indonesia. Abbreviation in the square brackets indicates the coffee type and it is used in the text hereinafter. All Arabica samples were submitted to a light roast. The detail analysis of the experimental...
Viskozita eidamského sýru během jeho zrání
Viscoelasticity of Edam cheese during its ripening
Šárka Nedomová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 183-192 | DOI: 10.11118/actaun201058040183
Series of the indentation of the ball (10 mm in diameter) by the constant speed into blocks of Edam cheese has been conducted. The indentation tests were performed at different speeds (1, 5, 10, 20 and 100 mm/min), and the corresponding force-displacement responses were fitted with an analytical solution to obtain the time-dependent constants and the instantaneous force-displacement response. The measurement has been performed for the cheeses of different stages of their maturity. The dependence of the indentation force on the penetration depth has been evaluated. This dependence can be fitted by a polynom. The indentation force decreases with cheese...
DENDROCHRONOLOGICKÉ DATOVÁNÍ PLAVENÉ DŘEVNÍ HMOTY NA PŘÍKLADU ŘEKY MORÁVKY A ČERNÉ OPAVY
Dendrochronological dating of large woody debris on the example of Morávka River and Černá Opava River
Michal Rybníček, T. Kolář, E. Koňasová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 193-202 | DOI: 10.11118/actaun201058040193
Woody debris is an inseparable part of natural river channels. In a river ecosystem it affects the hydraulic, hydrological and morphological properties of the channel, and it is also of a biological significance. However, besides the positive effects, the woody debris can also have a negative impact, e.g. the reduction of the flow profile capacity or the destruction of waterside buildings. With the development of log floating and timber trade, the woody debris started to be removed from the channels. Currently, within the process of stream revitalization, woody debris is being artificially placed into rivers. This paper deals with the possible dendrochronological...
Změny viskozity motorového oleje během provozu spalovacího motoru
Changes of engine oil flow properties during its life cycle
Libor Severa, Miroslav Havlíček, Jiří Čupera
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 203-208 | DOI: 10.11118/actaun201058040203
The work is focused on quantification of influence of operation on flow properties of motorcycle engine oil. Three different kinds of synthetic engine oil (MOTUL) were tested, namely unused oil, run-in oil (650 km after engine reboring) and regular engine oil (6200 km of motorcycle operation). The samples were frozen to below zero temperatures and kinematic viscosity was continuously monitored in the range of -5 °C and +115 °C. Consequently, the kinematic viscosity at reference temperatures of 0, 40 and 100 °C was compared. Viscosity was measured by digital viscometer with concentric cylinders measuring geometry. The biggest difference occurred in...
Zhodnocení aktuální kvality biologicky rozložitelného komunálního odpadu tříděného občany města Kroměříž
Assessment of current quality of biodegradable municipal waste separated by residents of Kroměříž
Bohdan Stejskal
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 209-212 | DOI: 10.11118/actaun201058040209
In an effort to meet the requirements for maximum material utilization, which is set forth in the Act No. 185/2001 Coll. on Waste and amendments to other Acts, and to achieve the objectives of the Waste Management Plan of the Czech Republic to reduce biodegradable waste going to landfill, a proposal for widespread deployment of separate collection and processing of biodegradable municipal waste in municipalities has become part of the amendment Act prepared by the ministry. In many places of the country pilot projects have been launched to test the technology and logistics of sorting, collecting, processing and utilizing biodegradable municipal waste...
HYDROBIOLOGICKÁ STUDIE MALÉHO TOKU NA ČESKOMORAVSKÉ VRCHOVINĚ
Hydrobiological study of the small stream on the Czech-Moravian Highlands
Ivo Sukop, Jan Šťastný, Tomáš Vítek, Tomáš Brabec
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 213-222 | DOI: 10.11118/actaun201058040213
Zoobenthos of the Fryšávka Rivulet was investigated in the years 2007-2008. Research included also physico-chemical factors of water (temperature, pH, conductivity, oxygen saturation). Altogether, 144 taxa of zoobenthos were determined in the Fryšávka Rivulet: Coelenterata (1 taxon), Turbellaria (1 taxon), Oligochaeta (6 taxa), Hirudinea (1 taxon), Mollusca (5 taxa), Amphipoda (1 taxon), Decapoda (1 taxon), Acari (1 taxon), Ephemeroptera (18 taxa), Plecoptera (18 taxa), Heteroptera (1 taxon), Megaloptera (1 taxon), Planipennia (1 taxon), Trichoptera (36 taxa), Coleoptera (8 taxa), Diptera (44 taxa). Altogether, 76 taxa of zoobenthos were determined...
Biologie Anacampsis populella (Clerck) (Lepidoptera, Gelechiidae)
The biology of Anacampsis populella (Clerck) (Lepidoptera, Gelechiidae)
Jaroslav Urban
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 223-232 | DOI: 10.11118/actaun201058040223
The paper deals with the occurrence, development and harmfulness of Anacampsis populella (Clerck) (Gelechiidae) on Populus tremula L. The pest was monitored on 5 to 15-year old trees of the species at Forest District Bílovice nad Svitavou (near the city of Brno) in 2008 and 2009. Caterpillars made leaf rolls of a mean length of 37.3 mm and width 5.5 mm there. In 80% leafrolls, one leaf was rolled up and in 20% two to five leaves. Towards the abaxial face of leaves, all leaves with caterpillars were rolled up but only part of peripheral leaves. Caterpillars occurred from 20 April to 25 June. They developed only through three instars and...
Fyzikální vlastnosti písků z čistíren odpadních vod
Physical properties of sand from the waste water treatment plants
Tomáš Vítěz, Radovan Kukla, Petr Trávníček
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 233-238 | DOI: 10.11118/actaun201058040233
The work is focused on characterization of selected physical properties of sewage sand from the waste water treatment plants. Sand is transported into wastewater mainly in areas with a combined sewerage system - principally in connection with rainfalls, in case of which it is transported through the sewerage system together with rainwater, but also (within smaller extents) due to leakages of sewerage systems or bad conduct of natural persons and legal entities. The main attention was focused on basic physical parameters such as content of total solid, ash free dry mass, density and granulometry. These material parameters are very often underestimated...
VLIV MÍSTA EXPOZICE NA SVĚTLOSTÁLOST TRANSPARENTNÍCH POVRCHOVÝCH ÚPRAV
The light stability of transparent coating materials is influenced by the location of exposition
Vratislav Závada
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 239-258 | DOI: 10.11118/actaun201058040239
The ultraviolet radiation (UV), reaching the earth's surface, changes color of the paint films. By exposure to weathering, the biggest damage is caused by light, especially short-wavelength UV, high temperature and humidity. Any of these factors can lead to degradation. These natural elements can be reproduced and accelerated in laboratory conditions in test devices, such as the fluorescent UV or xenon-arc test chambers. Such equipment can provide fast and reproducible results. The artificial aging is a useful tool for product research and it is required by many international standards. A major problem in comparing the outdoor and laboratory tests...
ZHODNOCENÍ VÝSKYTU FTALÁTŮ (1992-2009) V OBALOVÝCH MATERIÁLECH A PLASTECH, ZDRAVOTNICKÝCH MATERIÁLECH A KRVI PACIENTŮ, V KRMIVECH A POTRAVINÁCH A VE TKÁNÍCH JATEČNÝCH ZVÍŘAT A RYB
Evaluation of phthalate presence (1992-2009) in packaging and plastic materials, medical materials and patients' blood, in feedstuffs and foodstuffs and in tissues of slaughtered animals and fish
Alžbeta Jarošová
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 263-268 | DOI: 10.11118/actaun201058040263
Phthalic acid esters (phthalates, PAE) are very important contaminants of the food chain. In this paper, experimental data on the content of phthalates (di-n-butyl phthalate and di-(2-ethylhexyl) phthalate) in packaging materials for foodstuffs and in animal tissues (muscles of poultry, subcutaneous pork fat, poultry fat, renal beef fat, and muscles of fish) are presented. In packaging materials, detected concentrations of DEHP were higher than DBP concentrations. In feedstuffs for farm animals, detected concentrations of DBP are higher than DEHP concentrations, and, correspondingly, this was detected in fat of cattle and pigs as well. Examination...
VLIV VODOHOSPODÁŘSKÝCH ÚPRAV V DOLNÍM PODYJÍ NA VODNÍ BIOCENÓZY
Influence of water management in lowland region of the Dyje River on water biocoenoses
Ivo Sukop
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 269-276 | DOI: 10.11118/actaun201058040269
This work contains the results of influence of water management in lowland region of the Dyje River on water biocenoses. Research was carried out in 1977-1984, when building of the three reservoirs were started. The effect of the newly built reservoirs on the biocoenoses of the reach immediately below it was mainly beneficial. Before the reservoir near Nové Mlýny was bulit, the fish population of the Dyje River was regularly threatened by poor water quality. After completion of the three reservoirs in 1989 the pollution brought by the Dyje River was largely removed by the purification processes in the reservoirs, so that the Dyje River became cleaner...
Vliv sinic jako krmiva na ryby
Impacts of dietary cyanobacteria on fish
Andrea Ziková, Miroslava Palíková, Jan Mareš, Stanislav Navrátil, Radovan Kopp
Acta Univ. Agric. Silvic. Mendelianae Brun. 2010, 58(4), 277-284 | DOI: 10.11118/actaun201058040277
Development of cyanobacterial water bloom became a common issue all over the world. Cyanobacteria are the most important primary producers in aquatic ecosystems but in some abundant species their secondary metabolites called cyanotoxins seem to be harmful for many animal groups especially mammals but also fish. In fishes, adverse effects have been demonstrated in several studies applying cyanotoxins by unnatural injection. However, cyanobacteria and fish coevolved during ages and therefore the question arises whether cyanobacteria might be even used for fish via oral application (fish diet). The use of cyanobacteria for fish diets is varying including...