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Articles 1 - 8 of 8
Full-Text Articles in Life Sciences
Relationships Of Habitat Characteristics To The Relative Abundance Of Native And Invasive Amphipods In Western Lake Erie, James P. Duggan
Relationships Of Habitat Characteristics To The Relative Abundance Of Native And Invasive Amphipods In Western Lake Erie, James P. Duggan
Master's Theses and Doctoral Dissertations
No abstract provided.
The Influence Of Woodlot Size And Location In Suburban And Rural Matrices On Bird Species Richness And Individual Abundance, Neil Allen Chartier
The Influence Of Woodlot Size And Location In Suburban And Rural Matrices On Bird Species Richness And Individual Abundance, Neil Allen Chartier
Master's Theses and Doctoral Dissertations
This study assessed the influence of woodlot area and matrix composition on bird species richness and individual abundance. Bird surveys were conducted in winter 2004 and 2005 and spring 2005. Woodlot area and landscape composition were analyzed using GIS software. In winter, resident species richness and abundance increased as landscape diversity increased, whereas in spring, resident species richness decreased with increased landscape openness and abundance increased as woodlot area increased. Spring migrant species richness increased with increased landscape openness, and abundance decreased as woodlot area increased. In winter, Tufted Titmice were more likely to be present in smaller woodlots, whereas …
Learning And Cemory In The Cav1.2 Knockout Mouse, Jessica Ann White
Learning And Cemory In The Cav1.2 Knockout Mouse, Jessica Ann White
Master's Theses and Doctoral Dissertations
Of the many signaling pathways found within neurons, calcium signaling is perhaps the most ubiquitous and versatile. Calcium influx through L-type voltage-gated calcium channels (L-VGCCs) is involved in numerous aspects of neuronal function: activation and regulation of gene transcription, synaptic plasticity, and regulation of neuronal excitability are all modulated by calcium. Because many calcium-related subcellular functions are implicated in the formation and storage of long-term memory, this writer investigated the role of an L-VGCC, CaV1.2, in hippocampus-dependent learning and memory. Utilizing the Cre/loxP gene-targeting system, the CaV1.2 L-VGCC isoform was conditionally deleted in the forebrain of mice. This extensive deletion …
Application Of The ³H-Leucine Incorporation Technique For Quantifying Rates Of Bacterial Secondary Production Associated With Decaying Wetland Plant Litter, Jane E. Gillies
Master's Theses and Doctoral Dissertations
The 3H-leucine incorporation technique for quantifying rates of bacterial production has increased in popularity since its original description for bacterioplankton communities. Previous studies examining 3H-leucine-incorporation conditions for bacterial communities in other habitats have reported a wide range of final leucine concentrations to achieve saturation-level uptake. This study assessed the application of the 3H-leucine-incorporation procedure for measuring bacterial production associated with decaying wetland plant litter. Substrate saturation experiments were conducted on three dates for bacteria colonizing decaying litter of Typha angustifolia, Schoenoplectus validus, and Phragmites australis. Incorporation of 3H-leucine into protein exhibited a biphasic saturation …
Increased Expression Of Nadp Malic Enzyme In The Guard Cells Of Arabidopsis Plants, Pooja Thakur
Increased Expression Of Nadp Malic Enzyme In The Guard Cells Of Arabidopsis Plants, Pooja Thakur
Master's Theses and Doctoral Dissertations
Plants lose their water as transpiration by stomatal opening, which is governed by guard cells surrounding the stomata. Influx of ions such as K+, Cl-, from neighboring cells into guard cells, and malate synthesis within guard cells increases turgor pressure opening the stomata. Stomata close when K+ and Cl- efflux out, and the cytosolic isoform of NADP ME convert malate to pyruvate. We hypothesize that stomatal closure can be controlled by increased NADP ME activity in guard cells. More than one of the homozygous transgenic Arabidopsis plants that are transformed with a guard cell promoter driving expression …
The Effect Of Prey Availability On Metabolism And Activity In The Tarantula Phormictopus Cancerides (Araneae: Theraphosidae), Benjamin Nathan Philip
The Effect Of Prey Availability On Metabolism And Activity In The Tarantula Phormictopus Cancerides (Araneae: Theraphosidae), Benjamin Nathan Philip
Master's Theses and Doctoral Dissertations
This study examined the effect of different periods of food deprivation on resting metabolic rates (RMR) and foraging activities in tarantulas (Phormictopus cancerides). Juvenile tarantulas were separated into two feeding groups and fed once either every 5 or 30 days. Monthly feeding trials were preceded by RMR measurements. During feeding trials I compared differences between the two groups in (1) prey capture rates, (2) time to prey capture, (3) locomotory activity, and (4) the predator’s prey detection distance. RMRs increased for the well-fed group but remained consistent for individuals, fed only once a month. Time to prey capture …
Loggerhead Shrike (Lanius Ludovicianus L) Foraging Patch And Perch Selection, Miles Becker
Loggerhead Shrike (Lanius Ludovicianus L) Foraging Patch And Perch Selection, Miles Becker
Master's Theses and Doctoral Dissertations
Loggerhead shrikes have disappeared across much of their former range, most likely due to habitat loss. I studied the habitat shrikes prefer for foraging. Shrikes forage from a perch on prey that they see in the surrounding vegetation. When I mowed the vegetation on one side of selected perches, shrikes strongly preferred to forage on the mowed side even though prey biomass was far lower on this side. These results suggest that access to prey is important to shrikes rather than simply the total amount of prey in a habitat. Within territories, shrikes chose to perch on dead or partially …
Suction Pressure Measurement And Behavioral Observations Of Sprawning-Run Sea Lampreys (Petromyzon Marinus), Robert Dallas Adams
Suction Pressure Measurement And Behavioral Observations Of Sprawning-Run Sea Lampreys (Petromyzon Marinus), Robert Dallas Adams
Master's Theses and Doctoral Dissertations
Sea lampreys utilize attachment by suction throughout their life cycle. Despite the importance of this behavior, the role of surface texture in the attachment process has not been fully understood. The goal of this study was to develop a technique to quantitatively examine attachment abilities on surfaces of different texture and then to test whether the lampreys would seek out the surface that best promoted attachment. Results of the first experiment showed that the ability to attach depended on the interaction between a surface’s characteristics and the sea lamprey’s oral disk anatomy. For management applications where lamprey attachment is a …