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 31 for “"reproductive strategy"”.
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FOOD SECURITY: INNOVATIVE PLANT REPRODUCTIVE STRATEGY IN A CHANGING ENVIRONMENTAL CONDITION
Con il cambiamento climatico e l’aumento della popolazione, una delle nostre principali preoccupazioni è garantire la disponibilità alimentare globale. In questo contesto, è essenziale sviluppare strategie innovative per il miglioramento genetico delle piante. L'apomissia è un meccanismo …
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Psychopathy as a Conditional Reproductive Strategy in Boys and Men: An Evolutionary–Developmental Perspective
… may create a superficial yet effective mating strategy that enhances mating opportunities while foreclosing other opportunities (e.g., building relationships, skills). Overall, my thesis expands our understanding of psychopathy by considering both evolutionary and developmental perspectives …
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So happy together? : Pollination and reproductive strategy of two sympatric species of Acanthus L. in Kenya
Kakamega Forest represents the last remnant of equatorial rainforest in Kenya. Hence, it is of great importance as last habitat for species specialized on these forests and their associated ecosystems and, consequently, for East Africa’s biodiversity. The forest has been divided into several …
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Platyrrhine Phylogenetics With A Focus On Callitrichine Life History Adaptations
… history of a species is highly impacted by their reproductive strategy. In my dissertation I address the changing reproductive strategies in callitrichine New World monkeys and their genetic underpinnings using a phylogenetic approach. The necessity for a resolved phylogeny is universal to any …
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Variability of copepod abundance and growth in the southern Benguela upwelling system and implications for the spawning of the Cape anchovy
… It has been suggested that this energy-intensive reproductive strategy requires continual ingestion of copepods, which dominate the diet of anchovy at this time. This thesis investigates the spatial and temporal variability of copepod abundance and growth, and their impact upon the spawning of …
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VARIATION, ADAPTATION AND REPRODUCTIVE BIOLOGY IN RUPPIA MARITIMA L POPULATIONS FROM NEW HAMPSHIRE COASTAL AND ESTUARINE TIDAL MARSHES
… exhibit considerable variation in morphology, reproductive strategy and pollination ecology in response to a range of environmental conditions. Variation among the populations correlates with seasonal changes in environmental conditions recorded at various sites. A comparison of coastal and …
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The physiological ecology of the specialist lagoon amphipod, Gammarus insensibilis
… issue by providing information about the monthly reproductive investment and energy-balance as well as interactions with parasites for the specialist lagoon amphipod, Gammarus insensibilis (Stock). For comparison information is also presented on the reproductive investment of the lagoonal isopod …
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Natural and engineered surfaces for enhanced phase change heat transfer
… and structure, is governed by life history and reproductive strategy, rather than habitat. We utilize the knowledge of natural surface chemistries to develop hydrophobic materials for environmentally friendly superhydrophobic coatings. Furthermore, we answer a key scientific controversy …
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Sexual dimorphism in the genus Leucadendron : Morphology and plant hydraulics
… is linked to serotiny (a fire-adapted reproductive strategy), where highly serotinous females may incur extra resource costs in order to keep their transpiring cones alive between fires. This hypothesis predicts that the female morphology might be associated with more efficient resource …
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Faunal biogeography, community structure, and genetic connectivity of North Atlantic seamounts
… to the varying levels of host specificity and reproductive strategy of each ophiuroid species. These results will guide future studies and conservation efforts to protect seamount communities vulnerable to deep-sea fishery activities.
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Life History of the Southern Kingfish, <i>Menticirrhus americanus</i>, from the North-Central Gulf of Mexico
… occurring in mid-summer (June and July). The reproductive strategy of <em>M. americanus</em> is similar to that of other sciaenids in the GOM, although both relative batch fecundity and spawning frequency are lower than most other members of the family. The results from this study should …
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The evolution of annuality in association with a shift to more arid environments in the daisy genera Ifloga and Tricogyne
… making it only the second known example of this reproductive strategy within Asteraceae.
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Dynamique des populations de caribous migrateurs (Rangifer tarandus) basée sur des indices de condition corporelle
… condition and population size impact female reproductive success in the Rivière-George herd. At the population level, I determined the efficacy of body condition indices to estimate demographic trends for all four herds. Body condition of adult females was positively related to the …
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Applying evolutionary principles to the obesity problem and other issues in public health
… choices and evolutionary strategies (e.g. reproductive behaviour). In the second study, a secondary analysis of the second iteration of the North West Mental Well-being Survey (NWMWBS) 2012/13 was undertaken to supplement findings from study 1. These studies were analysed using regression …
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Genomic and Phenotypic Analyses of Polychaete Sibling Species <i>Platynereis dumerilii</i> and <i>Platynereis massiliensis</i> in Relation to Ocean Acidification
… rearing of different populations to study the reproductive biology and gamete morphology; (c) population genetics by the amplification of a mitochondrial DNA marker (COI); (d) population genomics by a next-generation sequencing approach (RAD-seq); (e) background analyses and a long term …
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Nutritional regulation of egg production of Calanus Finmarchicus in the North Atlantic
… is scarce, C. finmarchicus adopts a semelparous reproductive strategy. In July/August, the observed growth exceeded the estimated ingestion rates. This shortfall was possibly provided by cannibalising eggs.<br/>Assuming that EPA and DHA were used with high efficiency (0.9), the stoichiometric …
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Behavioral ecology of juvenile brown-headed cowbirds: implications for the evolution and maintenance of avian brood parasitism
… parasite likely contribute to the rarity of this reproductive strategy (ca. 1% of species). For my dissertation, I conducted research on juvenile brown-headed cowbirds (Molothrus ater) to elucidate the factors that contribute to the evolution and persistence of avian brood parasitism. To avoid …
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The Limits of Longevity
… necessary as a prerequisite of this kind of reproductive strategy. Others argue that fundamental theories of the evolutionary biology of aging absolutely preclude agelessness. Even putting evolutionary arguments aside, some mathematical models of cellular competition and senescence argue that …
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Assessment of Physiological Challenges in Overwintering Black Bears (Ursus americanus): Active Gestation, Neonatal Growth, and Skeletal Muscle Conservation
… wild ABBs do not experience pseudopregnancy as a reproductive strategy; 2) interactions between litter size and cub age best described postnatal cub weight dynamics and organ development. Twin cubs were heavier than single and triplet cubs, yet cubs from all litter sizes reached similar weights …
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The Impact of Global Climate Change on Tropical Forest Biodiversity in Amazonia
… which share traits such as growth form and reproductive strategy. Species' current distributions are modelled over a coarse scale (a 1º latitude-longitude grid), using a suitability index based on bioclimate variables. Distributions are additionally limited by species’ absolute tolerances to …
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