Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 123 for “"spiders"”.
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Community Ecology of Forest Litter Spiders
Embargo set by: Seth Robbins for item 78812 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs
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Ants and spiders in grassland food webs
Eine Herauforderung ökologischer Forschung ist das Verständnis des Zusammenhangs von Nahrungsnetzinteraktionen und Ökosystemfunktionen. Aktuelle Studien weisen dem Fraßdruck durch invertebrate Räuber und den damit ausgelösten trophischen Kaskaden eine wichtige Rolle in terrestrischen Ökosystemen …
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The hydrodynamics of water-walking insects and spiders
… by water-walking arthropods (insects and spiders). In our experimental study, high speed cinematography and flow visualization techniques are used to determine the form of the flows generated by water-walkers. In our supporting theoretical study we provide a formal fluid mechanical …
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Soybean Spiders: Species Composition, Population Densities and Vertical Stratification
Made available in DSpace on 2014-12-14T07:03:58Z (GMT). No. of bitstreams: 1 7726698.pdf: 2311519 bytes, checksum: 8a525d84fb0775b568f1f6cb0dc676ed (MD5) Previous issue date: 1977
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Exaggerated male weaponry in New Zealand sheet-web spiders (Cambridgea)
… of that exaggeration. Male New Zealand sheetweb spiders (Cambridgea spp.) possess chelicerae (jaws) which are significantly longer than those of conspecific females and these weapons are used by males in agonistic contests for access to potential mates. Using this genus and, in particular, the …
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Spiders of alfalfa with notes on the biology of Tetragnatha laboriosa Hentz
Several areas of the bionomics of spiders of alfalfa in Virginia were given preliminary investigation. The species complex of the spider fauna was determined and the seasonal occurrence of the four major species were plotted. The D-Vac sampler and the sweep net were the major sampling methods …
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Ecological Interactions Between Spiders and the Purple Pitcher Plant, <i>Sarracenia purpurea</i>
<p>Spiders and harvestmen are commonly captured by or reside upon the carnivorous purple pitcher plant, <em>Sarracenia purpurea</em>. Although spiders and harvestmen are often known to be prey of <em>S. purpurea</em>, other ecological interactions between these arthropods and the plant are poorly …
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Spiders on lowland heath: Functional diversity and abundance in relation to heathland structure
… on the abundance and functional diversity of spiders. Sampling was conducted within the Purbeck Heaths National Nature Reserve (PHNNR) over 30 sites (10 dry heath, 10 restored dry heath and 10 wet heath); each sample site measured 20m x 20m. A combination of pitfall traps, sweep netting and …
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Body Size In Antarctic And Temperate Sea Spiders: The Role Of Temperature And Oxygen
… of Antarctic and temperate pycnogonids (sea spiders) as a way of testing an underlying principle of the OTH that large bodied animals face stricter limits to aerobic performance as temperatures warm. First, I tested the effects of temperature on performance using two genera of giant Antarctic …
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Eight Legs And A Brain: Locomotor Mimicry Of Ants And Neuroethology Of Jumping Spiders
… behavior, and sensory neurobiology of jumping spiders (Araneae: Salticidae). The first section (Chapters 1 and 2) investigates antmimicry by the jumping spider Myrmarachne formicaria. The second section (Chapter 3) takes a neuroethological approach to sound perception in the jumping spider …
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The electronic spiders' web: Food, fodder, problems, and possibilities of a Global Information Infrastructure
This dissertation analyzes a fundamental tension in the development of a Global Information Infrastructure (GII) by examining one of the signficant historical trends of 20th century mass media from which this tension stems. The main historical trend examined is the increased control of media by …
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Influence of habitat complexity on diversity and community structure of arboreal spiders in grassland-shrub systems
… of arthropods in grasslands is unknown. Spiders are a useful indicator for examining the role of shrubs in arthropod ecology because they are genetically and behaviorally diverse predators and prey that can be captured and counted with a single method. Spiders are a key component of …
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Species Composition and Genetic Structure of Grassland Plant Communities and Their Influence on Spiders and Herbivorous Insects
Chapter 5 presents a lesson on diversity for students. Students investigated how plant diversity influenced insect diversity in an urban environment. I believe educational outreach is a fundamental part of our jobs as scientists, so Chapter 5 provides an example of how we can use our research …
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Spiders associated with apple trees in Virginia with notes on their importance in controlling orchard insect pests
The species complex and population dynamics of spiders were studied in an abandoned and several commercial apple orchards in Virginia. There were 68 and 45 species found in the abandoned and combined commercial orchards respectively. Species numbers in individual commercial orchards ranged from …
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Micro scale heterogeneity of spiders (Arachnida: Araneae) in the Soutpanberg, South Africa: a comparative survey and iventory in representative habitats
… to Marchin five habitat types with 34% of the spiders caught in spring being adults decreasing to 25% later in the season. Endemie taxa are associated with Tall Forest and, to a lesser extent, Woodland. The Woodland had the highest species diversity, and much of the variation observed in spider …
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