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Demography and Dispersal Ability of a Threatened Saproxylic Beetle: A Mark- Recapture Study of the Rosalia Longicorn (Rosalia alpina)
DRAG, Lukáš
This thesis focuses on demography and mobility of an endangered and strictly protected icon of European saproxylic biodiversity, the Rosalia longicorn beetle (Rosalia alpina). Using the mark-recapture method we estimated the size of the population, adult longevity, and dispersal ability of the Rosalia longicorn on three hills in the Ralska Upland, Czech Republic. Furthermore, we assessed the distribution pattern of another 15 populations inhabiting small patches of old beech forest in this area. Factors affecting local survival and the species conservation are discussed.
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Phylogeography and conservation genetics of endangered saproxylic beetles in Europe
DRAG, Lukáš
This thesis introduces the use of molecular methods for the conservation of several species of endangered saproxylic beetles in Europe. It focuses on the questions related to the DNA preservation and microsatellites development, as well as the evolutionary history and conservation of threatened species. Using the combination of mitochondrial and nuclear markers, the genetic diversity and reintroduction history of Cerambyx cerdo was assessed and the phylogeography of Rosalia alpina from the whole range of its distribution was studied. This information is valuable for designing more efficient conservation strategies.
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Guidebook to care for populations of the Alpine Longhorn Beetle (Rosalia alpina)
Čížek, Lukáš ; Drag, Lukáš ; Hauck, David ; Foltan, P. ; Okrouhlík, J.
This guidebook to care for populations of the Alpine Longhorn Beetle (Rosalia alpina) is based on the most recent scientific information available on biology and habitat requirements of the species. It also incorporates state of art knowledge on dynamics of its habitats and management of of sites inhabited by the species, including measures such as active creation of its habitat trees. The guidebook thus delivers effective guidelines for care for populations of this „priority“ species protected by European Union. The application of active and passive management measures described within this guide will ensure survival existing populations of this highly threatened species as well as their spread to wider surroundings of currently inhabited sites.
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Guidebook to care for populations of the Great Capricon Beetle (Cerambyx cerdo)
Čížek, Lukáš ; Drag, Lukáš ; Hauck, David ; Foltan, P. ; Okrouhlík, J.
This guidebook to care for populations of the Great Capricon Beetle (Cerambyx cerdo) is based on the most recent scientific information available on biology and habitat requirements of the species. It also incorporates state of art knowledge on dynamics of its habitats and management of of sites inhabited by the species. The guidebook thus delivers effective guidelines to care for populations of this species protected by European Union./nApplication of the management measures described within this guide will ensure survival existing populations of the Great Capricorn Beetle and their spread to wider environs of currently inhabited sites in the long term.
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The effect of ants predation risk for herbivorous insect
DRAG, Lukáš
This thesis is the first step to evaluate the relationship between ant activity (predation risk) and the leaf damage caused by herbivorous insects. Tuna baits which were used in 1, 2 and 3 hours intervals to attract different species of invertebrates. The degree of herbivory was measured as the proportion of leaves that had been chewed or mined by herbivores. The most abundant and frequent potential predators were ants. All ant species were determined and patterns of their activity analysed.
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