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Hodnota vybraného škůdce ze skupiny Aphididae a intragildové kořisti jako potravy pro pavouky druhu Philodromus cespitum
Uhrinec, Martin
This bachelor thesis deals with the value of selected pests of the group Aphididae and intraguild spider prey as source of food for the spider Philodromus cespitum in order to evaluate its biocontrol potential in forestry. The whole experiment was divided into two parts. In the first part, juvenile spiders were examined, and they were divided into four groups according to the type of their diet. Subsequently, several fitness indicators were examined – weight, development and mortality. In the second part of the experiment, mated females were observed. In this case, individuals were divided into three groups. In addition to fitness indicators, such as weight and mortality, they were evaluated primarily by fecundity. The types of prey included smaller spiders of other species and selected aphids that pests of significant tree species in forestry. The results showed that the selected aphids were, in terms of most fitness characteristics, of relatively good nutritional quality for the spider P. cespitum. Mortality was demonstrably lower and development faster in individuals that were fed with the diets that included aphids than in the individuals fed by the pure spider diet. The spider P. cespitum therefore have a potential as biocontrol agent of aphid pests in forestry.
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