RSS 1.0Theses and Dissertations-Biology
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Recent Submissions
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The Effects of Spring Flow on the Abundance of Heterophyid Cercariae in the Comal River, New Braunfels, TX
(2007-12)No abstract prepared. -
Effects of N-acyl-L-homoserine Lactone Lactonase on Disruption of Preformed Biofilms, Bacterial Recruitment, and Prevention of Biofilms
(2007-12)Biofouling is the accumulation of biofilms on inanimate surfaces in aqueous environments. Biofouling can produce economic as well as medicinal consequences such as decreased flow efficiency of chemicals through pipes, ... -
Breeding and Nesting Behavior and Habitat of the Red-billed Pigeon (Columbia flavirostris) Along the Rio Grande River in Texas
(2002-05)The Red-billed Pigeon (Columbaflavirostris) is a, declining species in Texas along the Rio Grande River. The main cause for decline in Texas is probably habitat loss due to agricultural and urban expansion. Whil~ once ... -
Pollinator Effectiveness, Pollinator Importance, and Pollen Dispersal in Star Cactus (Astrophytum asterias)
(2007-12)Star cactus (Astrophytum asterias) is a federally endangered plant and from known records is restricted to a single south Texas county and a small number of sites in northeastern Mexico. Star cactus is an obligate ... -
Habitat Characterization and Pilot Reintroduction of Star Cactus (Astrophytum asterias)
(2009-08)Astrophytum asterias is federally listed as endangered and in the United States is found only in Starr County, Texas. The species has a priority ranking of 2 by the United States Fish & Wildlife Service which means ... -
A Statistically Designed Karst Feature Survey, and Factors Controlling Karst Feature Density and Distribution
(2019-12)Karst feature inventories provide essential information used to evaluate a site’s degree of hydrogeologic connectivity to local and regional flow systems, as well as its environmental and ecological sensitivity. For ...
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A Morphological and Molecular Reassessment of Robergea albicedrae (Ascomycota)
(2019-12)Historically, ascomycete fungi have been classified based on key morphological characteristics such as spore size and shape, ascus morphology, and biochemical indicators. This approach has resulted in groups of organisms ... -
Use of Newly Constructed Wetlands by Wintering Waterfowl and Waterbirds
(2002-12)Texas coastal wetlands have been declining since the 1950s. Waterfowl and waterbirds, in particular, have been greatly affected by the loss of wetlands because these areas provide wintering habitat. In an effort to ...
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Differential Gene Expression and Colanic Acid Gene Effects on Biofilm Formation
(2004-12)Biofilm gene expression is an emerging field of study within bacterial genomics. Investigators strive to understand changes in phenotype, morphology, and metabolism in response to selective pressures within various ... -
Aspects of Laboratory Culturing of Larvae of the Freshwater Shrimps, Macrobrachium, of the Guadalupe River
(1975-08)No abstract prepared. -
A Heat Budget for Canyon Reservoir, A Subtropical Impoundment in Southcentral Texas
(2000-12)Annual heat budgets were constructed for a subtropical (30°N) reservoir over its 31-year history and used to examine the influence of local climatic variability on hydrological and thermal processes. Heat balances were ... -
Ethology, Social Organization, and Habitat Use of the African Ungulate, Kobus leche
(2003-05)The specialized areas of habitat in which red lechwe, Kobus leche leche, are found in Africa are quite different than those found on Texas ranches. Environmental, social, and biological determinants mitigate the lechwes ... -
The Status of Pseudemys Gorzugi (the Rio Grande River Cooter) in Texas Rivers
(2005-08)Many turtle species are threatened by changes to their habitats, introduced species, and exploitation for human uses including food, medicines, and pets. Pseudemys gorzugi, the Rio Grande River cooter, is listed as endangered ... -
Bird Diversity and Habitat Affinity on a Central Texas Ranch
(2000-12)Bird diversity and abundance are indicators of the health of habitats. Due to declining numbers of avian species and an increased awareness of the importance and economic benefits of birds, new attention has been directed ... -
Food Habits of Hunter Collected Northern Bobwhite Quail (Colinus virginianus) at the Chaparral Wildlife Management Area in South Texas
(2008-05)I investigated the feeding habits of wild northern bobwhites (Colinus virginianus) harvested from the Chaparral Wildlife Management Area in south Texas in October 2004 and January 2005. The contents of 200 crops were dried, ... -
A Comparison of Eradication Techniques for a Nonindigenous Emergent Plant Species (Colocasia esculenta)
(2006-12)Colocasia esculenta (L.) Schott is a nonindiginous emergent plant species that was introduced to Spring Lake and the upper San Marcos River (Hays County, Texas) ecosystem in the 1900s. This species forms dense ...
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Secretion of IL-6 by Astroglioma Cells in Response to TNF-α
(2004-05)Reactive astrocytosis or astrogliosis is associated with traumatic and pathologic injury to the central nervous system and is characterized by quiescent astrocytes becoming hypertrophic and hyperplasic. Studies of the ... -
Calcium Dynamics in a Subtropical Impoundment
(2001-12)Canyon Reservoir is a hardwater, oligo-mesotrophic impoundment located on a fourth order stretch of the Guadalupe River in Comal County, TX Canyon Reservoir is distinct from other hardwater systems in that it can have ...
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G35 Antigen Appears to be a Form of [Alpha]-actinin which Co-isolates and Co-localizes with Type III Intermediate Filaments
(2006-05)The G3.5 monoclonal antibody (mAB) was raised against multiple sclerotic plaque material from human brain and spinal cord. The antigen of this antibody has been previously designated an a-actinin-like protein with the ...
