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 15 of 15 for “"Ocean islands"”.
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Climatic and geodynamic influences on ocean island geomorphology
… vertical motions relative to sea level, volcanic ocean islands provide an exceptional natural experiment in landscape evolution. Analyses traversing gradients in island climate and bedrock age have the potential to advance our understanding of landscape evolution in a diverse range of continental …
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Le décepter dans la littérature orale de l'océan Indien : étude comparée
… In the traditional literature of the Indian Ocean islands of the Seychelles, Mauritius and Reunion. Originating from a unique blend of cultures, the popular literature of these islands lend itself to a comparative study with other folklore. The first chapter considers various Interpretations …
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Rôle des moustiques Culicidae, de leurs communautés microbiennes et des réservoirs vertébrés, dans la transmission des arbovirus à Madagascar
These last ten years, Indian Ocean islands have been the theatre of severe epidemics of arboviroses. However, little information was available about the local dynamics of the virus transmission and identity of the vector species and vertebrates réservoirs involved. Madagascar island was chosen for …
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Signatures of land-ocean interactions in coastal morphology
… of the shoreface, coral reefs, and volcanic ocean islands. Chapter 2 applies an energetics model, coupled with a 40-year wave-climate time series, to estimate crossshore sediment transport flux across the shoreface, illustrating how high-energy waves facilitate onshore sediment transport and …
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The use of maize streak virus (MSV) replication-associated protein mutants in the development of MSV-resistant plants
… is indigenous to Africa and neighbouring Indian Ocean Islands. Despite maize being a crucial staple food crop in Africa, the average maize yield per hectare in Africa is the lowest in the world, leading to food shortages and famine. A major contributing factor to these low yields is MSD. To …
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The use of maize streak virus (MSV) replication-associated protein mutants in the development of MSV-resistant plants
… is indigenous to Africa and neighbouring Indian Ocean Islands. Despite maize being a crucial staple food crop in Africa, the average maize yield per hectare in Africa is the lowest in the world, leading to food shortages and famine. A major contributing factor to these low yields is MSD. To …
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Phylogenies of the sunbirds, spiderhunters and flowerpeckers (Nectariniidae) based on analyses of vocalisations
… on the Indian subcontinent, reached Indian Ocean islands including Madagascar and then penetrated into Africa, with the possibility that some oceanic island species were later derived from secondary invasions from Africa. The results further suggest that the clade of the Gulf of Guinea group …
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Volatile metal degassing from volcanoes: source processes, atmospheric transport and deposition
… degassing in multiple tectonic settings (arcs, ocean islands, and continental rifts) and outgassing environments (magmatic vents and lava-seawater interactions), and extends to the compositional evolution of volcanic plumes in the atmosphere. Starting within the magmatic system, in Chapter 3 I …
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The reintroduction of the Aldabra rail Dryolimnas cuvieri aldabranus to Picard Island, Aldabra Atoll
… genus Dryolimnas is endemic to western Indian Ocean islands. Formerly widespread, it is now restricted to Aldabra Atoll (the Aldabra Rail D. cuvieri aldabranus) and Madagascar (the White-throated Rail D. c. cuvieri). Before this project began, the Aldabra Rail was restricted to Polymnie, …
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Testing for host adaptive evolution using the maize streak virus model
… Africa, and it neighbouring Indian and Atlantic Ocean Islands, where its insect vectors in the genus Cicadulina thrive. Of the eleven known MSV strains (called A through K), only MSV-A is economically significant as it is the only one that causes severe disease in maize. MSV is a single stranded …
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Adaptation of Chikungunya virus to Aedes albopictus mosquitoes: The role of mutations in the E1 AND E2 glycoproteins
… history, affecting parts of Africa, the Indian Ocean islands, India, and Europe. An unusual feature of this epidemic was the involvement of the previously unrecognized vector of CHIKV: Ae. (Stegomyia) albopictus mosquitoes. It was postulated that genetic changes in the virus might have …
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The metamorphic sheet and underlying volcanic rocks beneath the Semail ophiolite in the northern Oman mountains of Arabia
… of continental rift zones and some ocean islands. Two types of tholeiites are recognised: a relative (to MORB) trace-element enriched "transitional" type which probably farmed in a transitional within-plate tectonic setting and a "depleted" type with the characteristics of islandarc …
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A molecular and evolutionary study of skua breeding systems
… restricted to the Antarctic continent and nearby islands, while the latter has a circumpolar distribution which extends northward from the Antarctic Peninsula and includes many of the Southern Ocean islands. The south polar skua is strictly monogamous, while in contrast, a number of populations of …
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A heavy stable isotope approach to tracing mantle source and process
… of global mantle melts suggests that both mid-ocean ridge basalts (MORB) and ocean island basalts (OIB) sample lithological heterogeneities originating in both the upper and lower mantle, with recycled crustal material accounting for a significant part of this variability. Recently, heavy …
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Understanding and mitigating seabird bycatch in the South African pelagic longline fishery
… face additional mortality both on their breeding islands from introduced predators and at sea by fishing fleets, as fisheries bycatch, as well as other human impacts. Seabird bycatch has negatively affected many seabird populations worldwide, with trawl, gillnet and longline fisheries considered …