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 57 for “"competitive ability"”.
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Establishment and Competitive Ability of Nelumbo Lutea in Relation to Myriophyllum Spicatum
… October, suppressing M. spicatum at all depths. Competitive interactions between N. lutea and M. spicatum were investigated for two seasons in a container experiment situated within a pond. Where established, N. lutea dominated in the presence of M. spicatum. However, N. lutea could not be …
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Perch Selection by Male Dragonflies (Odonata, Anisoptera) Related to Competitive Ability and Species Composition
… height selection, position on the perch, and competitive ability. Four hypotheses were tested: 1) Dragonfly species would vary by size and that territorial species would show sexual size dimorphism (SSD), 2) Perch height selection would be related to dragonfly size, 3) Position on the perch …
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KINEMATIC COMPARISON OF THE UNDERWATER DOLPHIN KICK BETWEEN SWIMMERS WITH DIFFERENT LEVELS OF COMPETITIVE ABILITY
In order to be competitive in elite swimming competition, underwater dolphin kick (UDK) is considered an essential skill to master, although swim researchers and coaches claim that the mechanics of UDK are poorly understood and are often overlooked in training. The purpose of this study was to …
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Intraspecific variation in resource use, dormancy investment, and competitive ability in the facultative parthenogen Daphnia pulicaria
… that there is interspecific variation in the ability of species to capitalize on different resource quantities and qualities. One limitation of prior research in this system is that it has concentrated almost exclusively on interspecific variation in resource acquisition and allocation and has …
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THE ROLE OF MICROBIAL ENDOSYMBIONTS IN SORGHUM HALEPENSE INVASIONS: EVIDENCE OF A NEW INVASION STRATEGY, MICROBIALLY ENHANCED COMPETITIVE ABILITY (MECA)
… bacterial growth completely removed these competitive effects. Plants with bacterial endosymbionts also had increased production of the herbivore-defense compound, dhurrin, contained in leaves. When leaves from plants with bacterial endosymbionts were fed to a generalist insect herbivore …
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THE ROLE OF MICROBIAL ENDOSYMBIONTS IN SORGHUM HALEPENSE INVASIONS: EVIDENCE OF A NEW INVASION STRATEGY, MICROBIALLY ENHANCED COMPETITIVE ABILITY (MECA)
… bacterial growth completely removed these competitive effects. Plants with bacterial endosymbionts also had increased production of the herbivore-defense compound, dhurrin, contained in leaves. When leaves from plants with bacterial endosymbionts were fed to a generalist insect herbivore …
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Competition and Phenology of Invasive and Native Grasses in the Northern Great Plains
… attributes (phenological niche separation and competitive ability) that may contribute to the invasiveness of smooth brome and Kentucky bluegrass. The objectives of my thesis were to: (1) determine if phenological niche separation exists between invasive and native species; and (2) quantify the …
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Evaluating the Competitive Abiliy of Semi-leafless Field Pea (Pisum sativum L.)
… research was conducted to determine whether competitive differences exist among semi-leafless field pea cultivars and to determine the mechanism(s) driving competitive differences. Cultivars included in the studies were chosen on the basis of varying seed size and vine length, which are …
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An Experimental Investigation of Life History Variation in Native and Introduced Populations of <em>Silene latifolia</em>
… Introduced plants should exhibit increased competitive ability compared to native plants. I will determine if introduced plants show increased competitive ability compared to natives.</p>
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Aligned selection in cold climates breaks the rules of trade-offs in adaptation
… appear to be limited by trade-offs between their ability to compete with closely related species and their ability to tolerate environmental challenges like climate. However, we do not know how widespread these trade-offs are across taxa and environments. Here, we tested for widespread signatures …
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FEMALE COMPETITION AND THE ROLE OF TESTOSTERONE IN A POLYGYNOUS SYSTEM
Testosterone plays an important role in male competitive ability, and it may play a similar function in females. Female-female competition for resources is often associated with high testosterone, both within females and in comparison to males. Positive associations between testosterone and …
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FEMALE COMPETITION AND THE ROLE OF TESTOSTERONE IN A POLYGYNOUS SYSTEM
Testosterone plays an important role in male competitive ability, and it may play a similar function in females. Female-female competition for resources is often associated with high testosterone, both within females and in comparison to males. Positive associations between testosterone and …
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Towards regionalism through the Asean-China free trade area: prospects and challenges
… by the ASEAN member nations to match China's competitive ability having recently joined the World Trade Organization. The study also examined the compatibility of the ACFTA with the World Trade Organization rules and mode of dispute settlement under ASEAN and NAFTA as well as profound issues …
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The ecology of Brassica napus
… segregation of hybrid trait and changes in variability of traits may allow successive generations of volunteer B. napus weeds to display different levels of fitness and other traits. Three cultivars: 2 hybrid, and 1 open-pollinated at three consecutive generations: G1, the initial crop; G2, …
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Adaptation of an invasive grass to agriculture: ecological and genomic evidence
… variation in the size, rhizome production, and competitive ability of the global invader, Johnsongrass (Sorghum halepense), representing populations from agricultural and non-agricultural habitats across its introduced North American range. We also used these populations to explore the …
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Alaus prekių ženklų kūrimas ir valdymas Lietuvoje /
… brand is an especially important tool in the competitive struggle. Specialists emphasize that investments to popularity of brand require significant time and efforts. It is imperative to analyze the market development tendencies of different products, for adequate understanding of processes …
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NO SIMPLE TRADEOFFS: CENTAUREA PLANTS FROM AMERICA ARE BETTER COMPETITORS AND DEFENDERS THAN PLANTS FROM THE NATIVE RANGE
… to tradeoff-driven evolution of increased competitive ability in invasive plants by comparing growth, reproduction, competitive effect and response, and defense capabilities of invasive North American populations of Centaurea maculosa to populations in Europe, where the species is native. I …
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NO SIMPLE TRADEOFFS: CENTAUREA PLANTS FROM AMERICA ARE BETTER COMPETITORS AND DEFENDERS THAN PLANTS FROM THE NATIVE RANGE
… to tradeoff-driven evolution of increased competitive ability in invasive plants by comparing growth, reproduction, competitive effect and response, and defense capabilities of invasive North American populations of Centaurea maculosa to populations in Europe, where the species is native. I …
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Specificity in the ecology and evolution of plant defense against herbivores: Identity and history
… allocation away from costly defense towards competitive ability. This assumes that plants face a fundamental tradeoff between growth and defense, but we predict that this tradeoff depends on the biotic environment and specificity of plant responses to herbivores. I examined variation in …
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