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Effects and interactions of endocrine disrupting chemicals and diet on the mouse reproductive system
(University of Missouri--Columbia, 2007)
Recent studies have indicated that a number of ubiquitous chemicals found in the environment are linked to a myriad of health concerns, including reproductive abnormalities and increases in infertility, cancer, and obesity ...
A multi-scale investigation of ecologically relevant effects of agricultural runoff on amphibians
(University of Missouri--Columbia, 2008)
persistence when exposures occur in realistic contexts. Using laboratory studies, field studies, and landscape level surveys, I established that herbicides common in runoff can cause mortality and alter life history traits in amphibian larvae under laboratory...
The biology of the Florida scrub endemic millipede: Floridobolus penneri
(University of Missouri--Columbia, 2006)
be found to one degree or another in most habitats around the world. I report on several laboratory and field tests designed to learn about the ecology and life history of the large millipede, Floridobolus penneri that is endemic to native scrub only...
Obesity: a growing concern about fetal nutrition
(University of Missouri--Columbia, 2006)
Obesity is a growing epidemic and a major health concern in the United States and elsewhere. The Fetal Basis of Adult Disease (FBAD) theory holds that events that occur during development can permanently alter gene expression ...
Amphibian metamorphosis and juvenile terrestrial performance following chronic cadmium exposure in the aquatic environment
(University of Missouri--Columbia, 2005)
laboratory experiment was conducted on the terrestrial performance of southern leopard frog juveniles that metamorphosed from cattle tank mesocosms dosed once with 0, 5, or 18 [mu]g Cd/L. Individuals were kept in separate containers for two months and fed...
Examination of exogenous estrogenic chemical exposure and altered fetal nutrition in the CD-1 mouse fetus
(University of Missouri--Columbia, 2009)
My dissertation examines two issues related to disruption of fetal growth: exposure to exogenous estrogenic chemicals and altered nutrition. My first set of studies was aimed at manipulating isoflavones in feed on serum ...
Quantitative biological studies at cellular and sub-cellular level
(University of Missouri--Columbia, 2007)
We developed a translational magnetic tweezers for quantitative measurements at cellular and sub-cellular level. In the cellular studies, multiple membrane tethers were extracted simultaneously under constant force transduced ...
Methodological approaches for sound training in underepresented learners: a case study with american toads (Anaxyrus americanus)
(University of Missouri--Columbia, 2021)
efforts to better understand the minds of animals have been flourishing, with methodological breakthroughs and a remarkable increase in the number of publications dealing with a wide variety of non-model species. The growing interest in species...
Assessing the effects of anticoagulant rodenticides on non-target fish species
(University of Missouri--Columbia, 2018)
voiced by the public. To determine AR effects on coral reef fish found in Hawaii, U.S. Geological Survey was asked to address their sensitivity as a prerequisite of another DPN aerial broadcast over Lehua Island. In December 2016, we presented our...
The effects of axotomy on the biophysical properties of reticulospinal neurons in larval lamprey
(University of Missouri--Columbia, 2006)
Following severe spinal cord injury (SCI), in adult higher vertebrates there is little or no axonal regeneration, and animals remain paralyzed below the lesion. In contrast, lower vertebrates such as the lamprey, following ...
The evolution of complex calls In meadow Katydids
(University of Missouri--Columbia, 2018)
-opted the tick to also function in reproductive isolation. Importantly, we have also designed and field-tested a plan to use Meadow Katydids as tools in primary, secondary, and post-secondary classrooms/laboratories...
Gray treefrog breeding site selection and offspring performance in response to forest management
(University of Missouri--Columbia, 2007)
Amphibian diversity and abundance are generally reduced following clearcut logging. These impacts often last for decades, but little is known about why diversity and abundance are depressed. I examined gray treefrog breeding ...
Evolution of signal frequency in Neoconocephalus (Orthoptera: Tettigoniidae) : a study of perceptual and environmental sources of selection
(University of Missouri--Columbia, 2007)
N. retusus calls using bio-acoustic, behavioral and field-based experiments....
Regional mapping of the osteoarthritic joint
(University of Missouri--Columbia, 2019)
production of these biomarkers would not strongly correlate to the histological grading of OA severity. ... Further study is required to confirm the findings of this study. Ongoing studies in our laboratory are aimed at further mapping the production...
Interaction of RNA polymerase II and the RNA silencing machinery in heterochromatin formation of Drosophila
(University of Missouri--Columbia, 2008)
better understanding of cell cycle regulation. Aberrations in cell cycle regulation can lead to various types of malignant cancer. The study of heterochromatin structure will shed light on this important aspect of human health.--From public.pdf...
Beyond the edge : riparian habitat use and forest management effects on stream salamanders in the southern Appalachian mountains
(University of Missouri--Columbia, 2007)
While there are many types of habitat loss and degradation (e.g., agriculture, land development), many studies have focused on the impacts of logging on wildlife populations and on ecosystem processes. Little information, however, exists...
The role of terrrestrial habitat in the population dynamics and conservation of pond-breeding amphibians
(University of Missouri--Columbia, 2007)
-structured demographic models for two pond-breeding amphibian species and used these models to determine the potential effects of a range of core terrestrial habitat areas on population size and persistence. I next carried out field experiments designed to improve model...
The effects of metal contamination on larval white sturgeon in the upper Columbia River
(University of Missouri--Columbia, 2018)
survival and swimming behavior, and 3) metal concentrations measured at some sites in the UCR are above effect concentrations from laboratory studies. These findings suggest that metal contamination could be a factor in the decline of the upper Columbia...
Effects of forest fragmentation on reproductive effort and productivity of Indigo buntings (Passerina cyanea)
(University of Missouri--Columbia, 2005)
Forest fragmentation creates edge habitat that attracts nest predators that lower reproductive success and force birds to renest. To determine if predation-induced renesting causes a decline in condition of females and ...
Diversification in plant feeding insects : patterns of host-plant specialization and mating signal evolution inferred from species-level phylogeny and population genetics
(University of Missouri--Columbia, 2009)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Speciation yields two reproductively isolated groups capable of living in sympatry without cross-fertilization. Thi inability to hybridize is caused ...