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.
Results
Showing 1 to 20 of 41 for “"caterpillars"”.
-
I-magic labelings of cubic trees and n-caterpillars
… of cubic trees which are I-magic, namely cubic caterpillars. Furthermore, we classify all n-caterpillars as I-magic for n ≥ 3.
-
Social life-styles in caterpillars: Behavioral mechanisms and ecological consequences
… evolution and maintenance of social systems in caterpillars. I put the main emphasis of this work on the highly social, tent building European lasiocampid moth Eriogaster lanestris. In a comparative study aspects of the social biology of E. lanestris were compared to its congener E. catax and …
-
Acoustically mediated risk assessment of eastern tent caterpillars (Malacosoma americanum)
Research on acoustic defense strategies of caterpillars is lacking. Most known lepidopteran larvae have limited vision and live on a substrate during their larval span. Thus, sounds and/or vibrations of predators could have important roles in risk assessment. This thesis investigated acoustically …
-
Spring Phenology and Trophic Ecology of Trees, Caterpillars, and Migrating Neotropical -Nearctic Songbirds
… the trophic ecology of forest trees, caterpillars, and wood warblers (Parulidae) and vireos (Vireonidae) during spring migration in 2001--2003 at Trelease Woods, a deciduous forest fragment near Urbana, Illinois, USA (40°09'N, 88°10'W). I hypothesized that (1) the …
-
Polymorphism in Hawkmoth caterpillars - an ecological and biochemical study of crypsis in Smerinthus Ocellata (L.) and Laothoe Populi (L.)
… foodplant determines the colour of full grown caterpillars. Siblings reared on Salix fragilis L. (which has green leaves) became yellow-green, intermediate-green or dull-green whereas those reared on Populus alba L. became either white or green. Further experiments have shown that reflected …
-
The value of Mopane worms: quantifying ecosystem services in terms of nutrient cycling in semi-arid regions of Limpopo
Mopane worms are the late-instar stage caterpillars of the mopane moth, Imbrasia belina/ Gonimbrasia belina, found in southern Africa virtually following their hosts' trees, Colophospermum mopane, Terminalia seriscea, and Sclerocarya birrea, among others. The caterpillars are harvested for …
-
An Investigation into the Ecology and Evolution of Caterpillar Eyespots
… widespread and diverse in lepidopteran caterpillars, and these caterpillars with eyespots are typically assumed to be snake-mimics. Yet a dearth of empirical investigation has left us without evidence that eyespots can protect caterpillars, or the ability to substantiate our subjective …
-
Competition and Community Interactions of Two Generalist Herbivores
… species of herbivorous insects, western tent caterpillars (<em>Malacosoma californicum</em>) and fall webworms (<em>Hyphantria cunea</em>) on their shared host plant, chokecherries (<em>Prunus virginiana)</em>. Within species, I found that time-lagged intraspecific competition reduced larval …
-
Moths & Legends The contribution of chitoumou, the edible caterpillar Cirina butyrospermi, to food security, agriculture and biodiversity in a low-intensity agroforestry system
… Firstly, I evaluate the contribution of shea caterpillars to food security. I show that animal protein consumption and food security are higher during caterpillar season, and that higher food security is associated with caterpillar collection, sale and consumption. Shea caterpillars contribute …
-
Conceptual Design and Simulation of a Multibody Passive-Legged Crawling Vehicle
… similar to that used by insect larvae known as caterpillars. The passive-legged design is termed a "crawling" vehicle, to differentiate it from "walking" vehicles, which have powered legs. A conceptual design for the proposed vehicle was developed using insights from observations of caterpillar …
-
Facultative butterfly-ant interactions - the role of variation in composition of nectar secretions
… more distant relative. To obtain high numbers of caterpillars a new method for breaking the egg diapause of the univoltine P. coridon was established, resulting in 65% subitaneously hatching larvae. Based on observations of ants tending caterpillars a new “artificial ant” was assembled, allowing …
-
Population ecology of Pleuroptya ruralis (Scopoli) (Pyralidae:Pyraustinae)
… mechanism of population regulation. P. ruralis caterpillars were individually labelled and followed throughout their development on a natural growth of their food plant, Urtica dioica (the nettle), near Leeds, Yorkshire, United Kingdom. Parasitism and predation as well as the distribution and …
-
Bounds on Total Domination Subdivision Numbers.
… of the total domination subdivision number of caterpillars is presented in Chapter 5.</p>
-
Host use, mutualism and parasitism in the Lycaeides butterfly complex
… system. For the larval performance experiment, caterpillars from seven populations were reared on five host plants, asking if host-specific, adaptive larval traits exist. We found large differences in performance across plants and fewer differences among populations. These patterns of …
-
Indirect Effects of Elevated Carbon Dioxide on Members of Three Herbivorous Feeding Guilds on Soybean, Glycine Max
… development and mortality are not changed when caterpillars fed on soybean leaves grown under elevated levels of CO2, which may be the result of nitrogen fixation and consequent nitrogen enrichment in soybean foliage. (Abstract shortened by UMI.).
-
The Effects of Synthetic and Naturally Occurring Compounds on Microsporidian Infection in Insects
… furanocoumarin, delayed death in Trichoplusia ni caterpillars infected with Vairimorpha sp. (T. ni isolate). This delay in death is due to indirect effects. Xanthotoxin does not directly inhibit microsporidian development or invasion of the host, but rather inhibits one of five bacteria species …
-
Relationships between herbivores and Colophospermum mopane of the Northern Tuli Game Reserve, Botswana /
… overlooked, are documented. Mopane moth caterpillars, absent from within the confines of the NTGR for almost twenty years, are often encountered just outside the NTGR. Factors hypothesized to be responsible for their local extinction include ant predation, edaphic factors and browse …
-
Preference and performance of the Wild Indigo Duskywing (<i>Erynnis baptisiae</i>) on its native host Yellow Wild Indigo (<i>Baptisia tinctoria</i>) and on the introduced plant Crown Vetch (<i>Securigera varia</i>)
… on both native and introduced plants. Caterpillars reared on the native plant had significantly greater pupal weight regardless of the population origin. Larval feeding preference was significantly affected by the plant fed upon; larvae from both populations strongly preferred to feed …
Page 1 of 3