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 17 of 17 for “"Reproductive timing"”.
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Exploring perceptions of reproductive timing within British South Asian communities: A qualitative study.
… is a paucity of research that explores how the timing of motherhood is shaped by a range of intersecting social and cultural attributes, particularly amongst women in ethnic minority groups. To address this lacuna, this thesis aimed to explore how the timing of motherhood is perceived and …
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Associations between traits (blood pressure and body height growth) and reproductive timing related genetic variants from genome-wide association studies
… variants that are associated with women’s reproductive timing characteristics including ages at menarche and at natural menopause. However, the associations of these variants with other human health related phenotypes such as blood pressure, cancer, diabetes, obesity, and body height growth …
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Reproductive Biology of the Rabbitsfoot Mussel (Quadrula Cylindrica) (Say, 1817) in the Upper Arkansas River System, White River System and the Red River System
… River system of Kansas and Missouri. I compared reproductive biology and life history of three rabbitsfoot populations. These data are needed for management actions and may also be useful in assessing diversity among rabbitsfoot populations. Rabbitsfoot appear to reach sexual maturity at 4-6 …
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The role of a circalunar clock in speciation
… have been fully studied in terms of ecology, reproductive isolation, and genetic basis. Reproductive timing is one such trait, as organisms often synchronize reproduction to environmental cycles such as seasons. This assortative mating in time isolates reproduction between individuals with …
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Ice, Ice, Baby? A Sociological Exploration of Social Egg Freezing
… freezing in the context of debates surrounding reproductive ‘choice’ and ‘delayed motherhood’. The study sought to provide insights into how women perceive the risks and benefits of social egg freezing, how it relates to their discourses of parenthood and their future reproductive intentions as …
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Distribution, Relative Abundance, and Reproductive Seasonality of Larval Fish in the Red River
<p>Spawning habitat availability and reproductive timing are crucial factors that affect survival of larval fish. To understand temporal and spatial variation in larval fishes in the Red River, samples were collected from the Red River and North Dakota tributaries using ichthyoplankton nets. …
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The Influence of Weather and Geographic Location on Reproduction and Nightly Activity of Bats in Missouri
Understanding the influence of weather on reproductive events is critical for documenting population demographics and developing appropriate conservation and management strategies. Variations in timing of parturition may be due to changes in the ambient weather which affect the available insect …
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Life History and Distribution of Two Species of Cownose Ray, Rhinoptera bonasus and Rhinoptera brasiliensis, in Mississippi Coastal Waters
… brasiliensis</em> were analyzed to describe the reproductive biology. Reproductive timing, mating, gestation length, and parturition were similar among species. Although more samples are needed to confirm, we provide evidence of a larger size-at-maturity and size-at-birth for <em>R. …
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Chromosomal inversions as a mechanism for sympatric differentiation in common quails
… divergence, local adaptation and early reproductive isolation, but their effects in highly mobile species remain poorly understood. In the common quail Coturnix coturnix, a large inversion on chromosome 1 spans about 12% of the genome and defines three karyotypes (AA, AB, BB) that differ …
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Applied genomics toward targeted improvement of soybean
… eight candidate genes likely playing a role in reproductive timing of US soybean. I also used this resource to compare the allele composition of these US cultivars to 16 of the major North American ancestor lines from which they are derived. From this analysis, I highlighted regions of the …
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Reproduction, settlement, and phenology of intertidal barnacles: implications for larval dispersal
… predicted to result in changes to the seasonal timing of reproduction and settlement (phenology); faster development rates and, for crustaceans, smaller larvae; reduced larval dispersal distances; and reduced connectivity between coastal populations. However, these predictions are largely based …
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Reproduction, settlement, and phenology of intertidal barnacles: Implications for larval dispersal
… predicted to result in changes to the seasonal timing of reproduction and settlement (phenology); faster development rates and, for crustaceans, smaller larvae; reduced larval dispersal distances; and reduced connectivity between coastal populations. However, these predictions are largely based …
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Behavior, Physiology, and Reproduction of Urban and Rural Song Sparrows (Melospiza Melodia)
… desirable. Finally, I looked for differences in reproductive timing and success and for relationships between reproductive success and aggression (Chapter IV). Higher reproductive success in urban populations, coupled with differences in the timing of successful nests between habitats, suggest …
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Modelling dispersal and connectivity of broadcast spawning corals in the Western Indian Ocean
… future bleaching scenarios that might impact the reproductive timing and larval dispersal. Evaluation of the ROMS configuration for the western Indian Ocean shows that the basin-scale circulation patterns of the region are appropriately captured with the mean volume transports consistent with …
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Partitioning along reproductive niche dimensions in sympatric New Zealand freshwater bivalve species
… on host-fish. Although new data on their reproductive biology is being increasingly documented, particularly in the Northern Hemisphere, major gaps remain in New Zealand where two threatened Hyriidae, Echyridella aucklandica and E. menziesii, can co-occur. This thesis combines multiple …
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Impacts of heat waves on food quantity and quality of soy bean/corn in the Midwest at ambient and elevated [CO2]
… to soybean (Glycine max) in early and late reproductive periods. It was hypothesized that 1) if leaf temperatures in the heat wave plots reached supra optimal temperatures, then it would reduce rates of photosynthesis (A) and reduce yield in the short and long term. In the short term heat …
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Understanding Patterns of Phenotypic Variation in a Contemporary Population and Ancient Lineage of Fishes
… dolomieu–which includes genetic, climate, and reproductive data–to elucidate the complex drivers of variation in reproductive phenotype, an important aspect of life history in this economically and ecologically important species. In chapter three, we describe a new species of extinct polypterid …