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 317 for “"Beetles"”.
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Pollen digestion in flower-feeding Scarabaeidae : protea beetles (Cetoniini) and monkey beetles (Hopliini)
Beetles pollinate over 80% of all flowering plants and feed on the two most common floral rewards, nectar and pollen. Pollen is nutritionally very valuable, being a rich protein and carbohydrate source. However, the hard and highly resistant outer wall (exine) of the grain is an obstacle that …
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Monkey beetles on the beat: urban monkey beetles reveal opportunities for pollinator habitat management in a South African city
… Its ought to do so by investigating urban monkey beetles (Coleoptera: Scarabaeidae: Hopliini) in two ways. Firstly, it relates Hopliini community structure to urban environmental gradients and local habitat composition. This was achieved by using pan traps to sample pollinators at 145 sites during …
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Recognition in burying beetles (Nicrophorus spp., Silphidae, Coleoptera)
Burying beetles (Nicrophorus spp.) meet potential partners on carcasses. The aim of this study was to determine how males and females are able to determine potential partners from individuals of different species. The cuticular hydrocarbons of various species of European and Canadian burying …
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Ecology of Mite Phoresy on Mountain Pine Beetles
… interaction and demands clarification. In bark beetles (Scolytinae), both effects are documented during reproduction and effects on hosts during the actual dispersal are largely unknown. In the present research, I investigated the ecological mechanisms that determine the net effects of the …
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Identifying floral hosts of cerambycid beetles using palynology
… source for many insects including the adults of beetles whose larvae are important forest pests. I quantified the distribution of pollen-feeding in adults of several species of long-horned beetles (Coleoptera: Cerambycidae). Palynivory by cerambycid beetles is common in the subfamily Lepturinae …
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Wood trait preferences of Neotropical xylophagous beetles (Coleoptera: Cerambycidae)
… available to xylophagous insects. Cerambycid beetles feed on substrates that vary in these traits, but little is known about how they affect community composition. The goal of this project is to document the abundance of two cerambycid subfamilies (Cerambycinae and Lamiinae) and the WD, MC, …
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A mathematical model of a grazing system including beetles
[PAGES SCANNED INCORRECTLY] A number of mathematical studies of herbivore (predator)- grass (prey) models (e.g. Noy-Meir 1975,_ 1976,1978; Wielgolaski 1973; Christian et al. 1978) have been developed. With the exception of a few (Jackson 1980), in all these models the accumulation of dung in …
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Hymenopterous parasites of lps spp. bark beetles (Coleoptera:Scolytidae) in Virginia
The pine engraver beetles (~ spp.:Coleoptera:Scolytidae) may be serious pests depending on certain prerequisite conditions. In their secondary or "normal" role they breed in slash and damaged, dying, and dead trees. The broods emerging from these sources normally attack similar material. When such …
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Kansas blister beetles (Coleoptera: Meloidae): historical and alfalfa field survey results
Call number: LD2668 .T4 ENTM 1987 B56
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Kansas blister beetles (Coleoptera: Meloidae): historical and alfalfa field survey results
Call number: LD2668 .T4 ENTM 1987 B56
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Physiological bases of parental care in the burying beetles, Nicrophorus orbicollis
<p>Burying beetles, Nicrophorus orbicollis, have extended biparental care. They bury and prepare small vertebrate carcasses as food for their young. While females provide the most care, single males show a remarkable behavioral compensation after a mate loss. Here, I integrate behavioral and …
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THE EVOLUTIONARY ECOLOGY OF HOST-MICROBIOME SYMBIOSIS IN ONTHOPHAGUS DUNG BEETLES
The effect of host-microbe interactions on diverse aspects of host biology are increasingly appreciated across biological disciplines, yet the roles played by these interactions in shaping host evolution remain poorly understood. My dissertation research seeks to address these and related issues …
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THE IMPACT OF MICROCLIMATE ON BRANCH COLONIZATION BY NEOTROPICAL CERAMBYCID BEETLES
… Guiana revealed that wood-boring cerambycid beetles preferentially colonized branches at ground level in the dry season, but shifted to canopy level in the rainy season. The current beetle-rearing study was conducted to confirm the occurrence of this seasonal shift, explore possible causes, …
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The function of passive debris cloaking in tiny beetles (Coleoptera: Zopheridae)
… little evidence supporting this. Here, I used beetles of the family Zopheridae as a model to assess the function of passive debris cloaking. Zopheridae are global in distribution, but unusually diverse in Aotearoa New Zealand. Passive debris cloaking is highly variable between genera, making …
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Chemically-Mediated Mate Location and Recognition in Longhorned Beetles (Coleoptera: Cerambycidae)
… I test the hypothesis that adult longhorned beetles are attracted to volatile compounds emanating from larval host plants. Once on the larval host, the mating strategy is scramble and interference competition among males for females. I also find that large body size confers a mating advantage …
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Evolution and Taxonomic Distribution of Volatile Pheromones in Cerambycine Longhorned Beetles
Volatile sex or aggregation pheromones play an important role in mate location in many groups of insects. The lack of variation in these pheromone communication systems among the best studied groups has hindered understanding of the evolution of volatile pheromone use in insects. The diverse beetle …
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Chemical communication in cerambycid beetles and the molecular basis of olfaction
Longhorned beetles of the insect family Cerambycidae are a highly diverse group of insects whose larvae bore into the stems of forbs and the wood and roots of trees, and the family contains numerous pests of agriculture, forestry, and structural timber. The reproductive biology of adult cerambycids …
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EVALUATION OF POTENTIAL PRE-MATING REPRODUCTIVE ISOLATION IN TIGER BEETLES (CARABIDAE: CICINDELINAE)
… lack, of hybridization. In co-occurring tiger beetles (Carabidae: Cicindelinae), these between-species barriers are not readily apparent. To understand the characteristics potentially responsible for this isolation, we conducted behavioral and morphological experiments with two pairs of tiger …
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