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 40 for “"Termites"”.
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Factors Affecting Nitrogen Fixation Rates in Termites (Isoptera: Rhinotermitidae: <i>Reticulitermes</i>) and Termite Nitrogen Contributions of Forest Ecosystems
<p>Termites host symbiotic bacteria that fix atmospheric nitrogen, which makes termites important in the biogeochemical cycling of nitrogen in ecosystems. The objective of this study was to estimate annual nitrogen contributions by termites by examining seasonal rates of nitrogen fixation, seasonal …
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The ecology of Namibian fairy circles and the potential role of sand termites (Psammotermes allocerus Silvestri) in their origin
Regularly-dispersed patterning in the landscape occurs globally, both in the form of vegetated patches or gaps of bare earth within a vegetated matrix. Most theories link these periodic patterns to various biotic factors including selective grazing, allelopathy, nests of social insects, and …
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Hexaflumuron Efficiency and Impact on Subterranean Termite (Reticulitermes spp.) (Isoptera: Rhinotermitidae) Gut Protozoa
… to determine if hexaflumuron could kill termites via a secondary mode of action. Hexaflumuron consumption in no-choice and choice tests was evaluated at 2d and 5d. Total diet consumption was not different between the treatment groups. Hexaflumuron consumption was reduced by a factor of 3 …
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Termitophile encounter may be costly to the termite host
Termites nests are commonly invaded by other arthropods looking for food or shelter. These invaders cohabit with the builder species forming a symbiotic association known as termitophily. As every interespecific in- teraction, symbioses are characterized in a cost-benefit perspective, which defines …
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Research in Biological Control of the Formosan Subterranean Termite
… expressed by genetically modified maize to termites was tested. Plant tissues or extracts of three commercially planted Bt maize and two non-Bt maize were provided to termites as food. The results revealed no significant difference in survival rate, food consumption or length of tunnels …
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Influence of entomopathogenic fungi from forest and urban habitats on founding pairs of reticulitermes flavipes (rhinotermitidae)
In forest habitats, termites break down woody debris and assist in nutrient cycling of carbon and nitrogen. However, infestations in suburban habitats have given subterranean termites a high priority for pest management. Biological control of subterranean termites has been unsuccessful using …
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Investigating the actinomycete diversity inside the hindgut of an indigenous termite, Microhodotermes viator
… of termite hindguts involved the higher termites from the Termitidae family. Little attention was paid to the lower termites, and even less to the family Hodotermitidae. The main aim of this project was to explore the actinobacterial diversity of the paunch and colon hindgut regions of …
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The geochemistry of fossil termite nests in Calitzdorp, Western Cape, South Africa
Termites alter soil profiles by gathering nutrient-rich materials to construct their nests, known as termitaria. Certain termite species also fortify their termitaria using a combination of saliva and excrement (frass), resulting in geochemically distinct termitaria relative to the host soils. The …
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Comparison of Subterranean Termite (Rhinotermitidae: Reticulitermes) Gut Bacterial Diversity Within and Between Colonies and to Other Termite Species Using Molecular Techniques (ARDRA and 16S rRNA Gene Sequencing)
Termites are known to harbor within their gut a diverse assemblage of symbiotic microorganisms. Little work has been done, however, to describe the diversity and function of the bacteria in the economically important eastern subterranean termite, Reticulitermes flavipes. The first object of this …
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Secondary Plant Compounds as Feeding Deterrents in the African Subterranean Termite Schedorhinotermes lamanianus Sjöstedt (Isoptera: Rhinotermitidae): A Behavioural and Neurophysiological Approach
… also reduce feeding under no-choice conditions. Termites seem to ingest less food even when they started feeding and no alternative food source is available. Therefore these compounds act as repellents and feeding deterrents in S. lamanianus depending on the test conditions under which they are …
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The effect of consuming instant-maize porridge fortified With Termites and Moringa Oleifera Leaf powders on the nutritional status of children aged three to five years old in Thulamela Municipality, South Africa (RCT)
This chapter introduces the topic of the study, giving relevant background and highlighting the problem statement. It ends with the study's hypothesis, aim, specific objectives, significance, and conceptual framework. Malnutrition is the cause of deaths of eight million children under five years …
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Investigating physiological collaborations between a lower termite and its symbionts
… the eastern subterranean termite. Lower-termites, like <em>R. flavipes, </em>house symbionts from all three domains of life within their hindgut paunch. This intimate association is reflected in nearly every aspect of termite biology. Here, I investigate these physiological collaborations …
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The effect of habitat management on biodiversity and ecosystem functions in oil palm plantations in Sumatra, Indonesia
… groups, including large mammals, rats, ants, and termites, and associated ecosystem functions. Large Mammals & Rats: Using camera traps to assess mammal populations we showed that Leopard cats, which are an important predator of pest rats, prefer plantations with more vegetation. However, by using …
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African savanna elephant (Loxodonta africana) impacts on vegetation in a fenced area and the broader implications for elephant conservation.
… was identified as insects, where wood borers and termites were considered. Irrespective of tree height, termites were found to be more likely to colonise damaged trees without signs of recovery andwood borers were more likely to colonise damaged trees showing signs of recovery. Therefore, …
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Ecological Impact of Epigeal Termitaria on Vertebrates in the Tsavo Region of Southeast Kenya
Termites ecologically engineer their environment by producing termitaria (mounds) used by many other species as dens, lookouts or food sources. The role of termite mounds in biological communities is relatively unknown, despite their ubiquitous nature. I investigated their impact on vertebrates in …
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The Termite Digestome: Understanding the Digestive Physiology Involved in Lignocellulosic Biomass Degradation
… results of this dissertation indicate that: 1) termites and their symbionts act in a synergistic manner to degrade biomass in vitro, 2) the host fraction of the gut (i.e., foregut and midgut) is the likely site of glucose absorption, 3) the termite and its symbionts contribute specific enzymes …
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Environmental Influences on Subterranean Termite Foraging Behavior and Bait Acceptance
… conditions. In the laboratory, subterranean termites built significantly longer tunnels adjacent to cellulosic guidelines than plastic guidelines. In the field, all guideline materials were equally effective at directing tunneling activity. Reticulitermes spp. workers were tested to determine …
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Towards understanding the fate of perfluoroalkyl compounds (PFCs) within urban environments: implications for human exposure.
… used for control of ants, cockroaches and termites.
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Insectos y enemigos naturales asociados que colonizan troncos de pino en el municipio de San Fernando, Nueva Segovia, 2009
… a ser: Ips sp, Xyleborus sp, Lochmaeocles sp y termites fueron encontrados. Comparativamente Ips sp fue mas abundante en el sitio Las Tapias con un total de 179 emergencias, que representó el 44,58 % de los Ips sp que emergieron de los tres sitios de estudio. Asociados a Ips sp tres tipos de …
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