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Theses/Dissertations

1989

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Full-Text Articles in Life Sciences

Effects Of Acidic Precipitation On The Soil Chemistry And Bioavailability Of Aluminum, Manganese, And Copper, Alan Christie Stam Dec 1989

Effects Of Acidic Precipitation On The Soil Chemistry And Bioavailability Of Aluminum, Manganese, And Copper, Alan Christie Stam

Doctoral Dissertations

The effects of acidic precipitation on the soil solution chemistry and bioavailability of AI, Mn, and Cu in soils from spruce-fir and oak-hickory forests were examined in laboratory, greenhouse, and field studies.

Soil solution concentrations of labile (inorganic) monomeric AI (LMAI) increased with decreasing solution pH and with increasing exchangeable AI and decreasing exchangeable Ca/AI of the soils. Dissolved organic matter decreased with decreasing solution pH and influenced decreases in nonlabile (organic) monomeric AI (NLMAI).

Simulated acidic precipitation increased LMAI concentrations in the laboratory equilibration and greenhouse studies, but not in the field plot studies in oak-hickory and spruce-fir ...


Site-Directed Mutagenesis Of The Putative Processing Site Of Recombinant Human Immunodeficiency Virus Reverse Transcriptase, Susan M. Poppe Dec 1989

Site-Directed Mutagenesis Of The Putative Processing Site Of Recombinant Human Immunodeficiency Virus Reverse Transcriptase, Susan M. Poppe

Master's Theses

The human immunodeficiency virus (HIV) is the etiological agent of the acquired immune deficiency syndrome (AIDS). This retrovirus, encodes a RNA dependent DNA polymerase, reverse transcriptase (RT), which is essential to virus replication. Biochemical analysis indicated that RT is composed of 2 polypeptides of 66,000 and 51,000 daltons (p66 and p51) which combine to form a heterodimer. This heterodimer is thought to arise from the post-translational processing where p66 is made and either autocatalytic or proteolytic cleavage events result in a heterogeneous p66/p51. Site-directed mutagenesis was used at the proposed processing site to probe HIV-RT processing.

Three ...


The Effects Of Weight Training On The Self-Esteem Of College Students, John Christopher Wirszyla Aug 1989

The Effects Of Weight Training On The Self-Esteem Of College Students, John Christopher Wirszyla

Kinesiology, Sport Studies, and Physical Education Master’s Theses

This study investigated the effects of a weight training program on the self-esteem of college students. Subjects enrolled in a Beginning Weight Training course, a Beginning Golf course and an Introduction to Sociology course were administered the Tennessee Self Concept Scale (TSCS) at the beginning and end of an eight-week period. A subscale of the TSCS, the Total Positive (TP) score, served as the focal point of this study. The statistics used to analyze the data included ANOVA for between group comparisons and a matched pair t test for within group differences. The subjects in the Weight Training class significantly ...


The Effects Of Mental Imagery On Free Throw Performance, Lori Ansbach Eckert Aug 1989

The Effects Of Mental Imagery On Free Throw Performance, Lori Ansbach Eckert

Kinesiology, Sport Studies, and Physical Education Master’s Theses

The purpose of this study was to investigate the effects of mental imagery on free throw performance. The investigator used a pretest-posttest randomized group design consisting of three treatment groups and a control group. A total of 120 subjects were randomly assigned four groups. Subjects received either (1) mental practice, (2) physical practice, (3) a combination of mental and physical practice, or (4) no practice. The study was conducted over a period of five contact sessions lasting approximately twenty minutes each. Utilizing the analysis of multiple comparisons for ANCOVA, results demonstrated that the mental imagery group did improve their free ...


Frequency Of Rickettsia Sps. In Dermacentor Variabilis And Amblyomma Americanum In Central Hanover County, Virginia, Peggy Ann Keefe Aug 1989

Frequency Of Rickettsia Sps. In Dermacentor Variabilis And Amblyomma Americanum In Central Hanover County, Virginia, Peggy Ann Keefe

Master's Theses

In the eastern United States, Dermacentor variabilis is the primary vector of Rickettsia rickettsii, the etiological agent for Rocky Mountain Spotted Fever. Cases of Rocky Mountain Spotted Fever in eastern United States increased steadily from 1959 to 1979 to a peak of one case per 200,000 people in 1979 (Morbidity and Mortality Weekly Report, 1985). In 1976, 98.9% of the reported cases of Rocky Mountain Spotted Fever were east of the 100th meridian with 1.1% occurring west of the 100th meridian (Burgdorfer, 1977). Hanover County, Virginia is an endemic area for this disease (Sonenshine, 1971); the last ...


The Genus Marasmius From The Southern Appalachian Mountains, Dennis Edmund Desjardin Aug 1989

The Genus Marasmius From The Southern Appalachian Mountains, Dennis Edmund Desjardin

Doctoral Dissertations

The genus Marasmius (Tricholomataceae, Agaricales, Basidiomycotina) constitutes one of the larger genera of litter-decomposing and litter-binding mushrooms, represented worldwide by approximately 500 species. Thirty-eight taxa representing eight sections of the genus are recognized as occurring in the southern Appalachian Mountains. Seven of these taxa are new to science, while an additional 14 are reported for the first time from the study area. In addition, one new section is proposed.

Descriptions of southern Appalachian species of Marasmius have been compiled from data on macro- and micromorphological features of basidiomata, supplemented with data on geographical and ecological distribution. Details on nomenclature and ...


Cloning And Sequencing Of The Eco Rii Monomer Fragment Of Satellite Dna From The Mouse Mus Musculus, Timothy Patrick Boyle Aug 1989

Cloning And Sequencing Of The Eco Rii Monomer Fragment Of Satellite Dna From The Mouse Mus Musculus, Timothy Patrick Boyle

Master's Theses

Total mouse satellite DNA was isolated in cesium chloride gradients in the presence of the dye Hoechst 33258. This satellite fraction was digested with Bst Nl, an isoschizomer of the restriction enzyme Eco RII, and the 234 base pair monomer fragment was cloned into the plasmid vector pBS. Dideoxynucleotide sequencing of the cloned DNA yielded significant homology with the published consensus sequence of mouse satellite DNA (92%).


Proteolytic Cleavages Of Molecules Involved In Antigen Processing And Presentation: A Thesis, Lawrence James Thomas Aug 1989

Proteolytic Cleavages Of Molecules Involved In Antigen Processing And Presentation: A Thesis, Lawrence James Thomas

GSBS Dissertations and Theses

The overall goal of my thesis research was to understand better the mechanisms that control antigen processing and presentation by class II MHC molecules. Towards this goal I investigated ways in which the physical structure and post-translational modifications of the class II MHC alpha and beta chains and associated molecules might serve to regulate antigen processing and presentation. Specifically, I investigated (1) a hypothesis that Ii might aid binding of foreign antigenic peptides to the class II MHC foreign antigen binding site (desetope), and the application of this hypothesis to the prediction of class II-presented peptides; (2) the proteolytic ...


Characterization Of Acetylator Genotype-Dependent And -Independent Hamster Hepatic N-Acetyltransferases And Their Role In The Metabolism Of Arylamine And N-Hydroxyarylamine Carcinogens, Alma C. Trinidad Jul 1989

Characterization Of Acetylator Genotype-Dependent And -Independent Hamster Hepatic N-Acetyltransferases And Their Role In The Metabolism Of Arylamine And N-Hydroxyarylamine Carcinogens, Alma C. Trinidad

ETD Collection for AUC Robert W. Woodruff Library

An inbred hamster model for the human acetyIation polymorphism was used to investigate the biochemical basis for the acetyIation polymorphism and its relationship with the liver cytosolic enzymes arylamine N-acetyItransferase (NAT), N-hydroxyarylamine 0-acetyltransferase (OAT), and arylhydroxamic acid N,0-acyItransferase (N,O-AT). NAT and OAT activities were examined in liver cytosols derived from homozygous rapid and homozygous slow acetylator hamsters, respectively. Partial purification of hepatic NAT activity indicated the presence of two distinct NAT isozynes in each acetylator genotype. One isozyme was designated polymorphic acetyItransferase (PAT); whereas, the other isozyme was termed monomorphic acetyItransferase (MAT). Kinetic analysis showed that the acetyI ...


The Role Of Acetylator Genotype In The Expression Of Urothelial N-Acetyltransferases And Genotoxic Activation Of Arylamines In The Inbred Hamster System., Tokunbo Yerokun Jul 1989

The Role Of Acetylator Genotype In The Expression Of Urothelial N-Acetyltransferases And Genotoxic Activation Of Arylamines In The Inbred Hamster System., Tokunbo Yerokun

ETD Collection for AUC Robert W. Woodruff Library

Polymorphic expression of the arylamine N-acetyl transferases (NAT) in humans has been correlated with genetic predisposition to bladder cancer, but the molecular basis for the differential susceptibility is not fully understood. The inbred Syrian hamsters used In this study, with clearly defined acetylator genotypes, expressed acetylator genotype dependent NAT activity in crude and partially purified bladder cytosol, with apparent Vmax about 6- to 46- fold higher in rapid acetylators, concordant with genotypic expression of hepatic NAT activity. Parallel in vivo and in vitro genotoxicity assays detected higher levels of hepatic arylamine-DNA adducts (1.5- to 2.3-fold) and mutagenic acti-vation ...


Mounting Sex Pheromone: A Novel Pheromone Responsible For Mate Recognition In The Ixodidae, Jgc Hamilton Jul 1989

Mounting Sex Pheromone: A Novel Pheromone Responsible For Mate Recognition In The Ixodidae, Jgc Hamilton

Theses and Dissertations in Biomedical Sciences

Cholesterol oleate was demonstrated to be the cuticular contact sex pheromone of Dermacentor variabilis. This pheromone which has been termed the Mounting Sex Pheromone (MSP) was also demonstrated to be present on the surface of D. andersoni, Amblyomma maculatum and A. americanum. This contact sex pheromone enables males excited and attracted by 2,6-dichlorophenol to identify the female as a potential mating partner. The MSP is the second in the series of three sex pheromones guiding the hierarchy of behavioral responses which constitute tick courtship behavior. Tests with D. variabilis and D. andersoni showed that this pheromone could be removed ...


The Remipedia (Crustacea): A Study Of Their Reproduction And Ecology, Jill Yager Jul 1989

The Remipedia (Crustacea): A Study Of Their Reproduction And Ecology, Jill Yager

Biological Sciences Theses & Dissertations

Remipedes are an unusual group of troglobitic crustaceans that live exclusively in anchialine caves. Since their discovery in 1979, nine species have been described, seven of which are found in caves in the West Indies, one from the Yucatan peninsula of Mexico and one from the Canary Islands. Most of what is known about these animals has come mainly from taxonomic descriptions. Little has been published about their reproductive biology or ecology. The objectives of this dissertation were to investigate the reproductive biology and ecology of the remipedes inhabiting Sagittarius Cave on Grand Bahama Island, Bahamas.

Sagittarius Cave was chosen ...


A Comparison Of Maximal And Submaximal Heart Rate And Oxygen Uptake In Combined Arm And Leg Bicycling And Rowing, Victoria L. Asaro Jun 1989

A Comparison Of Maximal And Submaximal Heart Rate And Oxygen Uptake In Combined Arm And Leg Bicycling And Rowing, Victoria L. Asaro

Master's Theses

No abstract provided.


Symbolic Interactionist And Neurophysiological Models Of Action Towards An Integration, David Spencer Fearon May 1989

Symbolic Interactionist And Neurophysiological Models Of Action Towards An Integration, David Spencer Fearon

Senior Scholar Papers

This research proposal introduces an integrated study of action and human conduct from the perspectives of symbolic interaction and neurophysiology. Because of their traditionally disparate subject matter, the fields of sociological social psychology and the neurosciences seldom meet; however, I have found significant common ground to justify an integrated approach to the study of action. Symbolic interactionists study human group life and conduct in society. The neurosciences deal with the physiology of the central nervous system, its structure and functions in behavior, its chemical composition, and electrochemical activity, and the effects damage has on behavior. Both fields analyze the same ...


Vegetative Analysis Of The Monahan Reclaimed Mined Land Area, Jeff L. Vickers May 1989

Vegetative Analysis Of The Monahan Reclaimed Mined Land Area, Jeff L. Vickers

Electronic Thesis Collection

The Monahan reclaimed mined land area is located in Crawford County, Kansas, and is approximately one mile north and one mile east of Cherokee, Kansas. Strip and shaft mining both occurred at the site. The reclamation project was performed in 1984, with seeding of native grasses comprising the final stage.

The study was designed to evaluate the revegetation portion of the project. Data was collected to determine basal cover and frequency of plant species occurring on the site; soil pH measurements were also included in the study. This information was used to develop a comparative evaluation of the grass species ...


Pebble Nest Microhabitats Of Semotilus Species (Pisces: Cyprinidae), James Timothy Magee May 1989

Pebble Nest Microhabitats Of Semotilus Species (Pisces: Cyprinidae), James Timothy Magee

Master's Theses

The pebble nest microhabitats of four species of Semotilus were compared. Pit/mound nests of Semotilus corporalis were significantly larger than the pit/ridge nests of Semotilus atromaculatus, Semotilus lumbee, and Semotilus thoreauianus. Nests of S. corporalis were in wider and deeper streams. Pits of S. lumbee nests were longest of the four species; those of S. corporalis were widest and deepest. Semotilus corporalis used a greater proportion of larger stones (23 mm or greater) in nest construction than the other three species. There was no significant difference in the electivity index (percentage of nest pebble sizes versus those of ...


Life History And Ecology Of The Barrens Topminnow, Fundulus Julisia Williams And Etnier (Pisces, Fundulidae), Patrick L. Rakes May 1989

Life History And Ecology Of The Barrens Topminnow, Fundulus Julisia Williams And Etnier (Pisces, Fundulidae), Patrick L. Rakes

Masters Theses

The life history of the Barrens topminnow, Fundulus julisia, was investigated in a two-year study from 1983 to 1985. The species is restricted to a few isolated springs and groundwater-influenced upland streams on the Barrens Plateau in the vicinity of Manchester in middle Tennessee. In most aspects of its behavior, including feeding and reproduction, this topminnow differs little from other members of the same genus. The fish is an opportunistic carnivore, feeding upon aquatic insects, crustaceans, and gastropods, as well as terrestrial insects that fall in water. Like other killifish, F. julisia has an extended breeding season that is bimodal ...


Does Rubus Canadensis Interfere With The Growth Of Fraser Fir Seedlings?, Eric Frank Pauley May 1989

Does Rubus Canadensis Interfere With The Growth Of Fraser Fir Seedlings?, Eric Frank Pauley

Masters Theses

Vegetation change in the Great Smoky Mountains following balsam woolly adelgid-caused mortality of Fraser fir has included development of a dense Rubus canadensis shrub layer. Many fir seedlings have persisted in the forest understory, but the possible effects of Rubus on their annul growth have not been intensively studied.

This study had two objectives: (1) to determine if significant associations exist among density and shoot growth of Fraser fir seedling, density/biomass of Rubus canadensis, canopy closure, and soil chemical parameters, and (2) to determine the effects of removal of aboveground Rubus stems on fir seedling shoot growth.

Eighty 1 ...


The Use Of Modified Atmoshere Packaging And Phosphate-Citric Acid Dip To Extend The Shelf Life Of Fresh Catfish, Ictalurus Punctatus, Brian Preston Moore May 1989

The Use Of Modified Atmoshere Packaging And Phosphate-Citric Acid Dip To Extend The Shelf Life Of Fresh Catfish, Ictalurus Punctatus, Brian Preston Moore

Masters Theses

Ninety market size catfish (Ictalurus punctatus) 1 - 2 pounds live weight were slaughtered, dipped in one of three solutions (phosphate, phosphate + citric acid, no dip) then packaged in one of three atmospheres (100% CO2, 70% CO2 + 5% O2 + 25% N, Air) and were stored at 1oC or 5oC. The catfish were evaluated for aerobic plate count, anaerobic plate count, lactic acid count, coliform count, pH, oxidation, drip loss, color and odor at 0, 4, 8, 12 and 16 days. The 100% CO2 and 70% CO2 atmospheres effectively reduced the rates of ...


Physical And Sensory Properties Of High-Fiber, Reduced-Fat Biscuits, Pamela J. Stanyon May 1989

Physical And Sensory Properties Of High-Fiber, Reduced-Fat Biscuits, Pamela J. Stanyon

Masters Theses

Rolled biscuits were prepared with 0, 14, 28, and 42% wheat bran substituted for flour and 0, 20, 40, and 60% polydextrose substituted for hydrogenated shortening. Effects on physical and sensory characteristics of biscuits containing 16 combinations were determined with response surface methodology. Wheat bran decreased volume and produced harder, gummier, and chewier biscuits. Panelists indicated crumblier, drier, and chewier biscuits as bran level increased. Unlike wheat bran, polydextrose increased volume and decreased hardness. Panelists scored biscuits made with polydextrose as more moist, but no more chewy than biscuits made without polydextrose. Polydextrose appeared to impede some of the negative ...


The Effect Of Heat Treatments On Dietary Fiber As Assessed By Chemical Analysis And Scanning Electron Microscopy, Ming-Cheng Chang May 1989

The Effect Of Heat Treatments On Dietary Fiber As Assessed By Chemical Analysis And Scanning Electron Microscopy, Ming-Cheng Chang

Masters Theses

Today it is generally accepted by many nutritionists that dietary fiber plays an important role in human health. Increased consumption of dietary fiber is advocated for beneficial effects on human health; thus food technologists and the food industry are interested in the use of fiber as an ingredient in food products and in the manufacture of high fiber foods. Numerous researchers have concentrated on the physiological effects of dietary fiber, while few have investigated the effect different processing parameters have on dietary fiber.

Apple fiber, corn fiber, oat bran and soy fiber were prepared and analyzed after further processing (autoclaving ...


Variants And Polymorphisms Of Three Repetitive Dna Families In The Human Genome, Robert M. Roudabush May 1989

Variants And Polymorphisms Of Three Repetitive Dna Families In The Human Genome, Robert M. Roudabush

Electronic Theses and Dissertations

A novel 0.6 kb LINE family in human DNA, designated L2Hs, has been described (Musich and Dykes 1986). Studies employing clone N6.4, containing three 0.6 kb segments of this family, indicate that these sequences are interspersed and moderately repetitive. Two additional variant sequences of the L2Hs family, N6.1 and N6.3, have been identified. Restriction mapping of each cloned segment indicates similarities among N6.4, N6.3 and N6.1. When the cloned DNAs were cleaved with restriction enzymes and subjected to cross-hybridization, each cloned insert produced a pattern indicating that the sequences contained in N6 ...


An Analysis Of Institutional Approaches For Management Of Common Rangeland Resources In Sub-Saharan Africa, Mohale Gabriel Sekoto May 1989

An Analysis Of Institutional Approaches For Management Of Common Rangeland Resources In Sub-Saharan Africa, Mohale Gabriel Sekoto

All Graduate Plan B and other Reports

The purpose of this report is to address the issues that are relevant to the management of common rangeland resources in Sub-Saharan Africa. I feel that the issues presented here are among some of those which are important and need to be considered in order to understand the kind of performance perceived about the efforts to develop the range and livestock in pastoral societies. In this report, three case studies have been reviewed, regarding institutional approaches tried to manage common rangelands. These case studies are about group ranches in Kajiado District, Kenya and in Upper Volta and the Sehlabathebe Grazing ...


Immunological Characterization Of An Sds/Kcl Isolated Total Protein Antigen Of Bluetongue Virus Serotype 13, Vicki L. Shore May 1989

Immunological Characterization Of An Sds/Kcl Isolated Total Protein Antigen Of Bluetongue Virus Serotype 13, Vicki L. Shore

Undergraduate Honors Capstone Projects

Because of the damaging effects of bluetongue disease on the livestock industry, interest exists in developing a means of inducing passive immunity in infected animals. Antibodies against VP2, the polypeptide responsible for immunoantigenicity in bluetongue virus (BTV), have been found to elicit neutralizing antibodies; however, production of this purified antigen is very costly and thus impractical for commercial purposes. Total viral protein, prepared by a simple, rapid, highly reproducible SDS/KCl method, was injected into rabbits and found to produce antibodies which are useful in immunoblots. However, plaque neutralization assays failed to detect any neutralization activity by these antibodies. Denaturation ...


The Influence Of Embryo Cell Culture Systems On Pretransfer Development Of Early Ovine Embryos, Pablo Gabriel Daniel May 1989

The Influence Of Embryo Cell Culture Systems On Pretransfer Development Of Early Ovine Embryos, Pablo Gabriel Daniel

All Graduate Theses and Dissertations

The complete requirements for early embryo development in vitro of the ovine and other domestic species remain unknown. Many studies have concentrated on new media, supplementation, and gas atmosphere formulations.

A newer approach is to coculture early embryos with different cell types to provide the physico-chemical requirements for their development.

In this study, oviduct epithelial (OEC) and dissociated embryo cell (DEC) growth were tested in minimum essential media (MEM) and RPMI. Media were supplemented with fetal calf serum (FCS) and equine derived serum (EDS). Fetal calf serum supported maximum cell confluence in OEC collected on day 3 and day 13 ...


Utilization Of Poultry Waste (Composted Caged-Layer) As A Supplement For Sheep Fed Straw During Late Pregnancy, Raul Meneses R. May 1989

Utilization Of Poultry Waste (Composted Caged-Layer) As A Supplement For Sheep Fed Straw During Late Pregnancy, Raul Meneses R.

All Graduate Theses and Dissertations

The utilization of composed caged-layer waste (CCLW) in diets for pregnant ewes fed cereal straw was evaluated. Five sheep were assigned to five diets containing, 0, 5.72, 11.37, 23.80, and 32.69% CCLW in a 5x5 Latin square design. Water intake, feed intake and feces output were measured. Feed and feces were analyzed for dry matter, crude protein, acid detergent fiber (ADF), neutral detergent fiber (NDF), organic matter, hemicellulose and minerals. Thus, nutrient digestibility and nitrogen balance could be calculated. Forty dry, pregnant ewes in the last third of generation were assigned to four dietary treatments contained ...


Phenotypic Characterization Of Actinobacillus And Actinobacillus-Like Species Isolated From Ram Lambs With Epididymitis, Yen-Bou Liu May 1989

Phenotypic Characterization Of Actinobacillus And Actinobacillus-Like Species Isolated From Ram Lambs With Epididymitis, Yen-Bou Liu

All Graduate Theses and Dissertations

The purpose of this study was to characterize phenotypically Actinobacillus and Actinobacillus-like species cultured from ram lambs with epididymitis (lamb epididymitis), so as to better understand the species and strains of Actinobacillus responsible for causing the disease. Two American Type Culture Collection (ATCC) type species of Actinobacillus (A actinomycetemcomitans and A seminis) and 24 field isolates were tested in this study. The field isolates were cultured from either lesions or semen of ram lambs with clinical epididymitis and had been identified as members of the genus Actinobacillus, based on cultural and morphological criteria. When analyzed by sodium dodecyl sulfate-polyacrylamide gel ...


Characterization Of Anti-Pichinde Virus Monoclonal Antibodies For The Directed Delivery Of Antiviral Drugs And Toxins, Noah Jefferson Burns Iii May 1989

Characterization Of Anti-Pichinde Virus Monoclonal Antibodies For The Directed Delivery Of Antiviral Drugs And Toxins, Noah Jefferson Burns Iii

All Graduate Theses and Dissertations

Mouse monoclonal antibodies directed against Pichinde virus (PCV) were produced to evaluate their application as vehicles for the delivery of antiviral drugs or toxins to virus-infected cells. Four monoclonal antibodies, PC4.9A6, PC4.9D3, PC4.7C2, and PC4.8D3, were of the IgG2a subisotype and reacted with acetone-fixed and live PCV-infected Vero-76 cells. In vivo stained splenic macrophages derived from PCV-infected hamsters that had been injected with fluorescein-labeled PC4.9A6 (FITC9A6) demonstrated a 400% increase in total fluorescence over similarly treated, non-infected cells when analyzed by flow cytometry. This is an indication that FITC-9A6 does have some ability to specifically ...


Seasonal Variation In The Species Composition, Abundance, And Size-Frequency Distribution Of Zooplankton In Bear Lake, Utah-Idaho, Edmundo G. Moreno May 1989

Seasonal Variation In The Species Composition, Abundance, And Size-Frequency Distribution Of Zooplankton In Bear Lake, Utah-Idaho, Edmundo G. Moreno

All Graduate Theses and Dissertations

Bear Lake, a large oligotrophic lake (282 km2), was studied from October 1986 to December 1987 to determine the temporal changes in the zooplankton assemblage at one site in the pelagic zone and one in the littoral area. In this study, species composition, abundance, biomass, and size frequency distribution were determined. Additionally, chlorophyll a, water transparency, and temperature and oxygen profiles were measured to help interpret zooplankton changes during the study.

The zooplankton species assemblage comprised eight species of cladocera, seven species of copepods, and five species of rotifers. The abundance and biomass of the zooplankton assemblage, particularly that ...


Diel Vertical Migration And Feeding Of Underyearling Bear Lake Sculpin Cottus Extensus (Pisces, Cottidae), Darcy Neverman May 1989

Diel Vertical Migration And Feeding Of Underyearling Bear Lake Sculpin Cottus Extensus (Pisces, Cottidae), Darcy Neverman

All Graduate Theses and Dissertations

Underyearling Bear Lake sculpin exhibit a diel pattern of vertical migration throughout the pelagic region of Bear Lake (Utah-Idaho) until they are approximately 22 mm standard length. Individuals move from the bottom of the lake (5° C) during the day into the water column (13-16° C) at night. The migration, however, is not related to feeding. Although the dominant copepod in the water column, Epischura nevadensis, do undergo a similar diel vertical migration, stomach analysis of juvenile sculpin captured by trawling shows that they do not feed in the water column. Instead, from July through October, their diet is dominated ...