Biology Commons^™

The Quality Of Storm Runoff From Different Kinds Of Land Surfaces In The Drainage Basin Of Westhampton Lake, Richmond, Virginia, Margaret Emil Coppedge

Master's Theses

Samples of runoff were collected during storms from four different areas within the drainage basin of Westhampton Lake, Richmond, Virginia, between October, 1977, and January, 1978. The areas were a residential area, concrete street gutter, asphalt parking lot, and broadleaf forest.

The samples were analyzed for pH, levels of reactive phosphate, nitrate, and turbidity, and their effects on the growth of algae from Westhampton Lake.

The pH of runoff from the residential area, gutter, and forest usually ranged between 6-7 and the parking lot usually ranged between 4-5. Levels of turbidity varied considerably between storms and areas. Runoff from the …

Lactate Dehydrogenase Isozyme Patterns From Five Species Of Snakes : Comparison Of Rattlesnake Vibratory Muscle With Body Epaxial Muscle, Cecil Bernard Cross

Master's Theses

Lactate dehydrogenase (LDH) isozyme patterns of seven tissues in each of five species of snakes are described from their polyacrylamide gel electrophoretic characteristics. The tissues examined included vibratory tail muscle, non­ vibratory tail muscle, body epaxial muscle, heart muscle, whole blood, liver and kidney. The species of snakes included Crotalus adamanteus, C. h. horridus, Agkistrodon piscivorus and Sistrurus miliarius barbouri from the family Crotalidae and Natrix taxispilota from the family Colubridae. These snakes show a decreasing continuum of tail vibratory activity, respectively, to N. taxispilota, which has a non­vibratory tail muscle.

Crotalus adamanteus, C. h. horridus and A. piscivorus have …

Distribution Of Etheostoma Nigrum Rafinesque, Etheostoma Olmstedi Storer, And Their Introgressive Hybrid Populations In The James River Drainage, John Edward Clark

Master's Theses

An analysis of proportional measurements and meristic characters of Etheostoma nigrum and E. olmstedi identified five populations within the James River drainage. Etheostoma nigrum inhabited the montane and piedmont areas through the Fall Line; E. o. atromaculatum was distributed throughout the tidal river and its lower tributaries; and E. o. olmstedi was restricted to creeks on the upper coastal plain. Appomattox River and Falling Creek contained introgressive hybrid populations with character frequency distributions intermediate to those of E. nigrum and E. o. olmstedi. It is proposed that E. nigrum probably entered these drainages through stream piracy on piedmont tributaries of …

Antipredative Function Of The Gelatinous Coating Of The Eggs Of The Frog, Rana Pipiens, Walter Stanley Jennings

Master's Theses

The eggs of Rana pipiens, the southern leopard frog, were offered in several forms to Lepomis macro­ chirus, the bluegill. The fish were offered random trial discrimination tests while in groups of one or five in 40 1 aquaria. L. macrochirus learned to make distinct discriminations and rejected fertilized and unfertilized egg masses, boiled egg masses, dried frog eggs and gelatin made with homogenated frog eggs. In contrast, Shrimp-el-etts, Shrimp-el-etts dyed black, gelatin made with peptone, and ovarian eggs were accept­ ed readily. The results suggest a protective function for the gelatinous coat: both physical and chemical . The chemical …

A Study Of The Nymphal Stages Of Trichocorixa Verticalis Verticalis (Fieber) Under Laboratory Conditions, Sharon R. Raczynski

Master's Theses

No abstract provided.

The Effect Of Isoproterenol And Alpha- And Beta-Adrenoreceptor Blockade On Renin Release And Cyclic-35́-Adenosine Monophosphate Content In Rat Renal Cortical Slices, Louis Michael Lissuzzo

Master's Theses

No abstract provided.

The Effects Of Linear Alkyl Benzene Sulfonate On The Incorporation Of Radioactive Uridine Into High Polymer Rna During The Early Development Of The Fathead Minnow (Pimephales Promelas Rafinesque), James P. Hardwick

Master's Theses

No abstract provided.

Effect Of Dopamine And Dietary Sodium Deficiency On In Vitro Renin Release And Cyclic 3 ́5 ́-Adenosine Monophosphate Content In Male Rat Kidney Slices: Modification By Dopaminergic-Receptor Agonistic And Antagonistic Agents, Victor Allyn Aletich

Master's Theses

No abstract provided.

Susceptibility Of Different Embryonic Stages Of The Fathead Minnow, Pimephales Promelas (Rafinnesque), To Linear Alkyl Sulfonate Toxicity, Don L. Thompson

Master's Theses

No abstract provided.

The Non-Teratogenic Effects In Mice Progeny By Maternal Treatment With Amygdalin, Victoria Ann Rowe

Master's Theses

No abstract provided.

The Activity Of The Enzyme Rhodanese In Normal And Malignant Mouse Tissue, Mary Poletti

Master's Theses

No abstract provided.

Studies Of Aging Patterns And Phosphatase Isozymes In The Life Cycle Of The Nematode Panagrellus Silusiae, Glenn Nicholas Doering

Master's Theses

No abstract provided.

Incidence Of Dirofilaria Immitis And Dipetalonema Reconditum In Illinois And A Study Of Potential Mosquito Vectors Of Dirofilaria Immitis, Bolaji Nelson Akande

Master's Theses

No abstract provided.

A Morphological And Histological Study Of The Hepatitis B Antigen Treated Nicotiana Sylvestris And Nicotiana Tabaccum Variety Xanthi, Jeanne Elisabeth Moldenhauer

Master's Theses

No abstract provided.

The Fluorescence Microscopic Study Of The Infection Of Saccharomyces Cerevisae (Yeast) Protoplasts With Tobacco Mosaic Virus, Madhubhai. Patel

Master's Theses

No abstract provided.

The Effect Of Amygdalin On The Process Of Regeneration In The Adult Newt, Notopthalmus Viridescens Viridescens (Rafinesque), Mary Therese Micaletti

Master's Theses

No abstract provided.

The Orientation Of Asplanchna Brightwelli In A Weak Horizontal Magnetic Field, Priscilla Kathleen Dale

Master's Theses

No abstract provided.

An Ultrastructural Study Of The Early Embryogenesis Of The Zebrafish, Brachydanio Rerio, Eleanore Paunovich

Master's Theses

No abstract provided.

The Microscopic Anatomy Of Lepidodermella Squamata (Dujardin, 1841), Raymond W. Ulbrich

Master's Theses

No abstract provided.

The Effect Of Colchicine On Ergot Alkaloid Content Of Seeds Of Ipomoea Violacea, Joseph F. Noferi

Master's Theses

No abstract provided.

The Effects Of Prolonged Ultraviolet Irradiation On The Pigment System Of Pet/Wmr Mouse Epidermis, Penny Suzanne Nair

Master's Theses

Repeated exposure to ultraviolet radiation brings about an increase in the DOPA-positive melanocyte population of the human. However, there is an age-dependent decline in the melanocyte population regardless of UV irradiation. In the rhesus monkey, a drop in the DOPA-positive epidermal melanocyte population has been observed after prolonged UV irradiation. The population of DOPApositive epidermal melanocytes in PET/Wmr mice reaches a peak during the first post-natal week after which the number of cells declines, fading almost completely within 3 weeks. Their occurrence in adult mice is rare. With UV irradiation (300 nm) the melanocyte population of newborn and adult PET …

The Effect Of Photoperiod On The Regressive Phase Of The Ovarian Cycle Of The Lizard, Anolis Carolinensis., John Dickens Pinch

Master's Theses

The effects of constant photoperiod (14 hours of light) and decreasing photoperiod (13-8 hours of light) on the regressive phase of the ovarian cycle of the lizard Anolis carolinensis were investigated. Changes in body, liver, ovary and oviduct weights were measured and microscopic examinations of several ovarian parameters were made. In both light regimens body and liver weights decreased over the first four weeks of the experiment but both increased at the sixth week. In addition, ovary weight was highly variable but exhibited a decreasing trend and oviduct weight decreased. There were decreases in the number of previtellogonic follicles and …

Seasonal Nearshore Distributions Of Fishes In A Piedmont Section Of The James River, Virginia, Eugene George Maurakis

Master's Theses

The seasonal nearshore distributions of 17 species of fishes were determined in natural and artificially heated areas in a 9.6 km stretch of the Piedmont section of the James River, Virginia from July, 1973 to June, 1974. Analyses of the seasonal distributions were based on abundance and percent frequency of occurrence data. The maximum abundance and percent occurrence of ten of the 17 species of fishes in natural temperature areas occurred in early autumn. Deviations from this pattern included Notropis analostanus, equally abundant throughout the year, and Lepisosteus osseus, Notropis amoenus, Notropis ardens, Notropis rubellus, Catostomus commersoni and Lepomis macrochirus, …

The Modification By Temperature Of The Effects Of Mammalian Follicle Stimulating Hormone And 17b-Estradiol On The Process Of Vitellogenesis In The Lizard, Anolis Carolinensis, Susan Howard Early

Master's Theses

The effects of porcine follicle stimulating hormone, 17B-estradiol, and a combination of the two on the process of vitellogenesis were studied in Anolis carolinensis maintained at 15C with no light for one week, and then at 15C or 32C with 14 hours of light for two additional weeks.

At both temperatures, the control animals subjected to 14 hours of light possessed greater numbers of previtel­logenic follicles and lower liver weights than the control animals sacrificed after one week in the dark. Animals maintained at the higher temperature and given different hormonal treatments showed significant increases in ovary and oviduct weights, …

The Relationship Between Gill Na+ + K+ -Activated Adenosine Triphosphatase Activity And Sodium Regulation In Acclimation Of The Blue Crab, John Lewis Harris

Master's Theses

Evidence from this study suggests that Na++K+-activated ATPase is involved in the ionic regulation of sodium in the hemo-lymph of the blue crab in low salinity environments. The time course of changes in gill Na++K+-ATPase specific activity follow- ing transfer of crabs from JO o/oo to 5 o/oo salinity indicates that a major increase in activity occurred within 2.5-3.0 hr. Apparently, a 8.8-11.1% decrease in hemolymph sodium ion concen-tration to about J55-J60 meq/1 in approximately 2-J hr was sufficient to activate the ATPase cation transport system in the gills of Callinectes sapidus. Following enzymatic activation, hemolymph sodium concentration gradually approached …

The Role Of An Eyestalk Extract In The Regulation Of The Blood Sodium And Calcium Concentrations Of The Blue Crab Callinectes Sapidus, Gregory Martin Ivy

Master's Theses

The effect of bilateral eyestalk ligation or ablation on the blood Na+ and ca++ concentrations of the euryhaline blue crab, Callinectes sapidus, was measured in 10 o/oo and 5 o/oo sea water. The ablations caused a significant decrease in the blood Na+ and ca++ over a 24 hour period. The serum Na+ level increased significantly 6 hours following injections of an eyestalk extract whereas the blood total ca++ level did not change significantly. Eyestalk ligation, however, did not cause significant blood Na+ and ca++ changes. The blood Na+ level of intact crabs increased significantly in acclimating to colder water when …

Las Inhibition Of Diffusion And Uptake Of Tritiated Uridine During Teleost Embryogenesis, Carol Muehleman

Master's Theses

No abstract provided.

The Effects Of Las On The Ultrastructure Of The Teleost Chorion, Mark Xavier Vancura

Master's Theses

No abstract provided.

The Passage Of Las Across The Teleost Chorion And The Mouse Placenta, Annabella Juhasz

Master's Theses

No abstract provided.

An Ultrastructural Study Of Prostaglandin F₂Α -Induced Alteration Of The Corpus Luteum Of Early Pregnancy Of The Icr-Cd1 Strain Of Mice, Marilyn Miller

Master's Theses

No abstract provided.