Open Access. Powered by Scholars. Published by Universities.®
- Keyword
Articles 1 - 4 of 4
Full-Text Articles in Life Sciences
Effects Of 17Β Estradiol In The Metabolism And Morphology Of Bluegill Sunfish (Lepomis Macrochirus), Neeta Parajulee Karki
Effects Of 17Β Estradiol In The Metabolism And Morphology Of Bluegill Sunfish (Lepomis Macrochirus), Neeta Parajulee Karki
Masters Theses
Fish natural habitats are increasingly contaminated with various estrogenic compounds, including 17β estradiol (E2). This compound causes adverse effects on the reproductive system of male fish; however, the effects of E2 on other aspects of fish metabolism, morphology and histopathological changes in internal organs are not well known. The objective of this study is to evaluate the effects of E2 exposure on the basal and stressed metabolic rate, morphological changes in body shapes, and histological changes in the liver tissues of sunfish species. Fish were held individually in ten gallon tanks under two treatments of 40 and 80 ng/L and …
Morphology And Variation In The Gargle Call In A Chickadee Hybrid Zone In Central Illinois, Shannon Marie Regan
Morphology And Variation In The Gargle Call In A Chickadee Hybrid Zone In Central Illinois, Shannon Marie Regan
Masters Theses
Black-capped (Poecile atricapillus) and Carolina Chickadees (P. carolinensis) have distributions that span the northern and eastern portions of the United States. The areas where these distributions meet are called contact zones and extend from Kansas to New Jersey. Contact zones often have a narrow range of hybridization and usually within these zones of hybridization we will see a mixture of genetic, morphological, and cultural traits. One focus of this project was to compare morphology and genetics of chickadees within and near the largest Illinois contact zone, which has not been done previously. This contact zone was …
Dna Markers Identify Genetic Heritage Between Chickadees Near A Contact Zone In Illinois, Fahad M. Alshammari
Dna Markers Identify Genetic Heritage Between Chickadees Near A Contact Zone In Illinois, Fahad M. Alshammari
Masters Theses
I studied the genetic interactions of Black-capped (Poecile atricapilus) (BCCH) and Carolina (P. carolinensis) (CACH) Chickadees in and near the largest hybrid contact zone in Illinois. Biologists have assumed Carolina and Black-capped Chickadees hybridize in their large contact zone in Bond and Fayette Counties, based on intermediate morphological measurements, plumage characteristics and the production of aberrant vocalizations. In determining hybridization, however, diagnostic genetics may be more useful than any other criterion. The genetic and environmental factors that have contributed to the survival of this chickadees hybrid zone have underscored the genetic integrity of both species. We …
The North American River Otter (Lontra Canadensis) On The Department Of Energy's Savannah River Site, Emily B. Mccallen
The North American River Otter (Lontra Canadensis) On The Department Of Energy's Savannah River Site, Emily B. Mccallen
Masters Theses
The Department of Energy's (DOE) Savannah River Site (SRS) faces a legacy of radionuclide and metal contamination from industrial processes that occurred within the site. The risks posed to ecosystems on the site from contaminants are quantified using the ecological risk assessment process, which often uses the health of a particular species as an ecological endpoint. Northern river otters (Lontra canadensis) are appropriate receptors for studying the effects of long-term, low-level contamination because they are long-lived, higher trophic level organisms likely to accumulate high levels of pollutants. However, little information about river otters on the SRS is known; …