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Population dynamics of Asp Leuciscus aspius from the Želivka dam
Bouše, Eduard ; Švátora, Miroslav (advisor) ; Pivnička, Karel (referee)
The aim of this study was to evaluate the material about the asp Leuciscus aspius (L., 1758) from the dam Želivka - Švihov in the years 1971 - 2014. Main emphasis was put on the analysis of the flock spawning from 2008 - 2014. Here, basic abiotic conditions were monitored at the time of the spawning and growth and population characteristics were calculated. Spawning took place at two locations, at 4 - 10 0 C, the asp showed a spawning site accuracy. Males predominated on the spawning grounds in the overall ratio of 1,22 : 1. The age of the fish examined ranged from 3+ to 13+. The average mortality of adults is about 0,4. Additional flock spawning ranges from 20 to 50%. The length at which scales begin to form (SL = 29,7 mm), was determined by using the rate between the body length and scale radius. Differences in the growth rates between males a females are minimal, only from the third to the fifth age group, males showed a higher growth rates. The length - weight relationship can be described as W = 0,0153. L3,19 .
Population dynamics of Asp Leuciscus aspius ( L., 1758) from the Želivka dam
Bouše, Eduard ; Švátora, Miroslav (advisor) ; Pivnička, Karel (referee)
The scale material of the asp (Leuciscus aspius, L., 1758) collected from the Želivka dam between 1971 and 2012 has been processed and evaluated. The samples gathered between 2008 and 2012 have been used to determine the basic growth and population characteristics. In the first place I focused on the shoal spawning analysis. The age of individuals in this analysis ranged between 3+ to 13+, at the body length ranging between 370 to 690 mm. The length of the fish when the scales begin to appear (SL = 29,7 mm) was determined on the base of correlation between the body length and the scale radius. The growth rate in recent years was defined using the technique of back - calculation from the scales. The body length-weight relationship can be described as W = 0,009 ∙ L3,1 . The difference in the growth speed between males and females was minimal and statistically inconclusive. The growth speed of an asp in the Želivka dam is roughly at the same level as all other water reservoirs in Czech Republic.
The use of otoliths for growth and population dynamics studies of Percidae and Cyprinidae in Most water reservoir
Tůmová, Eliška ; Frouzová, Jaroslava (advisor) ; Pivnička, Karel (referee)
This Master thesis compares growth of Percidae and Cyprinidae in flooded mining pit Most with water reservoir Vír, which is stable, fifty years old. Fish were cought using toils by workers from Hydrobiology institute, Academy of Sciences, Czech Republic, which are exploring fish stock. Otoliths, scales, and operculas from both families, Cyrinidae and Percidae, were removed from fish for age determination and growth back-calculation in individual years. Due to surplus of nutrients and food in flooding mining pit is assumed a huge growth difference in the first two years of life. The aim of this thesis is not only to describe the difference in the expected growth of individual species, but also to estimate its causes. At the same time will be in a very contrasting conditions compared different methods of age determination. Key words: otolith, fish age, fish population, fish growth, water reservoir, flooded mining pit, growth back-calculations
Population structure of the gray wolf (Canis lupus)
Říhová, Jana ; Hulva, Pavel (advisor) ; Pivnička, Karel (referee)
Gray wolf (Canis lupus), is historicaly the most widespread carnivore with the former range including most of the northern hemisphere. The ambivalent relationship of humans to this predator resulted in extermination of this species in many areas, on the other hand led to the evolution of the dog, unique domesticant with vast phenotypic variation. The effort of conservation biology in last decades resulted in the shift of perception the role of big carnivores in ecosystems, with consequent recolonization of many regions by wolf, including the Czech republic. This changes brings the elevation of interest in this taxon by both experts and laymans. Present review aims to assemble published information regarding distribution, phylogeography, population structure, social and spatial behaviour of the gray wolf. The chapters describing the domestication process of the dog and hybridization with his wild ancestor are included.
Basis for conservation assessment of Plant diversity of dry basic habitats within the forest environment in the Doksy region
Martinec, Pavel ; Sádlo, Jiří (advisor) ; Pivnička, Karel (referee)
Theme: Basis for conservation assessment of Plant diversity of dry basic habitats within the forest environment in the Doksy region Abstract: The subject of present study is high species richness of vascular plants on localities of dry basic habitats in Doksy region. This habitats are enclosed by nutrients poor habitats of coniferous forests, restricted to small areas and spatially isolated. The dry basic habitats represent high valuable areas for nature conservation due to high α-diversity and occurence of rare plant species with scarce populations within flora of Czech Republic. The aim of study is to collect and review known data about dry basic habitats of Doksy region and their biodiversity. Consequently find optimal approaches in analysis of biodiversity and approach in interpretation for nature conservation. Actual status of flora and vegetation depend on environmental factors, biotic interaction, evolution and historic development. The perspective theoretical approach in species diversity analysis shows the species-pool hypothesis (Taylor et al. 1990) which assorts and describes these factors. Keywords: biodivesity, vascular plants, Doksy region, species-pool hypothesis, nature conservation

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1 Pivnička, K.
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