Life Sciences Commons^™

Studies On The Grooming Behavior And Morphology Of The Freshwater Prawn, Palaemonetes Kadiakensis, Bruce E. Felgenhauer

Masters Theses

No abstract provided.

The Bryoecology Of Montgomery County, Illinois, Elbert A. Traylor

Masters Theses

No abstract provided.

The Effects Of Superovulation On The Reproductive Cycle Of Mature Female Mus Musculus, David F. Grace

Masters Theses

A total of 38 Mus musculus were used to compare superovulation to normal ovulation in three different areas of the reproductive cycle. The areas studied include the fertilization and abortion rates, alternation of ovarian function, and normalization of estrus cycling. No statistically significant differences were noted between the two groups in either fertility rates or abortion rates. A distinct difference was noted in alternation of ovarian function. Normally ovulating mice showed a distinct right or left preference in the number of ova ovulated from each ovary. Animals showing a left preference exhibited approximately a 2:1 ratio and animals with a …

Home Range And Movements Of Fox Squirrels (Scirius Niger) In East Central Illinois, Sheryl L. Dyer

Masters Theses

No abstract provided.

Viability Of Pre-Adult Stages In Drosophila Melanogaster, Khadijeh Shakerifar

Masters Theses

The pre-adult viability of four pure strains and two hybrid strains was determined for Drosophila melanogaster. The data fail to show significant mortality and the ratios of the duration of the three different stages remained approximately constant. There are many factors which have been found to affect survivorship; one factor is density. As density of population within a limited and closed universe increases, the rate of mortality would increase and viability would generally decrease. However, our densities were well within the range having no effect on viability. Under the conditions these experiments were performed, no genetic or environmental factors …

Cytological Investigations Of Eremosphaera Viridis De Bary, Richard Allen Valentino

Masters Theses

Eremosphaera viridis de Bary was studied with light microscope techniques to determine the method of cytokinesis and to explain the ontogeny of the membranous ring separating the mature daughter cells in the intact sporangium.

It is proposed that cytokinesis in this organism is phylogenetically advanced and that the separation of mature daughter cells involves the sequential deposition of two cell walls. The first wall develops centripetally by the addition of membrane subunits. The resulting cleavage furrow is oriented by transverse microtubules found along the cell division plane. The newly formed walls separate the two daughter cells and give rise to …

A Taxonomic Study Of The Lichen Flora At The Peaks Of Otter Natural Area Along The Blue Ridge Parkway, Bedford County, Virginia, Michael L. Slaughter

Masters Theses

No abstract provided.

The Effect Of Ergosterol On The Desaturation Of 14c-Labeled Oleic Acid In Tetrahymena, Maynard E. Neville Jr.

Masters Theses

The ciliated protozoan Tetrahymena pyriformis-Strain W desaturated ¹⁴C-labeled fatty acid substrate in both sterol supplemented (ergosterol) and nonsupplemented cultures. Cis-octadecenoic acid (¹⁴C-9-18:1), when added to the medium during the log phase of growth, was incorporated into the cells and also desaturated at the Δ⁶ and Δ¹² positions. The ¹⁴C labeled substrate and products, linoleate (9,12-18:2) or linolenate (6,9,12-18:3) were recovered and separated by silver-nitrate Unisil column chromatography. Initially, recovery of ¹⁴C compounds varied widely when expressed as the percent of total counts per minute recovered from column chromotography, and a variety of …

Interrelationships Of Hypera Postica (Gyllenhal) (Coleoptera: Curculionidae) And Bathyplectes Curculionis (Thomson) (Hymenoptera: Ichneumonidae) In Illinois With Emphasis On Host-Parasite Densities, Distribution Of Parasites Within Available Hosts And Estimates Of Percent Parasitism, Robert John Barney

Masters Theses

In an attempt to better understand the host-parasite relationship of the alfalfa weevil, Hypera postica (Gyllenhal) (Coleoptera: Curculionidae) and Bathyplectes curculionis (Thomson) (Hymenoptera: Ichneumonidae), all life stages of the parasite were monitored throughout the spring. Sampling was conducted on a degree day basis from early March to late May in an alfalfa field in Mason County, Illinois.

Dissections of host alfalfa weevil larvae revealed 2nd and 3rd host instars were preferred larvae for oviposition. Peak parasite densities were found to precede peak total host larval densities, but coincided with peak densities of the preferred 2nd and 3rd instars. Larger host …

Seasonal Diversities Of Lotic And Lentic Benthic Insect Populations, Jerry E. Bindel

Masters Theses

The benthic insect populations from Lake Charleston and the Embarras River above and below Lake Charleston were examined twice monthly for seasonal differences in number of organisms, number of taxa and species diversity from October 13, 1976 to February 16, 1977. The water quality parameters of alkalinity, carbon dioxide, dissolved oxygen, pH and temperature were also examined for each site to determine if any parameter showed a sufficient deviation as to exert an influence on the benthic insect populations. Low dissolved oxygen and high carbon dioxide values were noted and occurred at times corresponding to lower numbers of taxa and …

Analysis Of The Capture-Recapture Method Of Determining Fish Population Size In A Pond Community, Richard E. Hall

Masters Theses

No abstract provided.

A Cytogenetic Study Of Xx/Xy Chimerism And Other Anomalies Of Bos Taurus In A Sampled Dairy Herd, Ferne M. Rogers

Masters Theses

The establishment of normal chromosomal patterns for a wide range of plants and animals has led to the recognition of abnormalities as well as their relationship to phenotypic irregularities. Research dealing with the expression of human karyotype is of prime interest; but, closely rivaling that is the genetic study of domestic animals which are of economic importance to man.

One observed anomaly which has come under scrutiny by cytogeneticists is that of the female member of a heterogeneous bovine twin pair, the freemartin. This is a sterile animal with internal morphology showing varying degrees of intersex. Cytogenetic studies reveal XX/XY …

A Stream Survey Of Riley Creek, Coles County, Illinois, Using Macroinvertebrates As Indicators Of Organic Pollution, Joseph R. Rowe

Masters Theses

A stream survey of Riley Creek in Coles County Illinois, was undertaken to determine ecological trends and the qualitative status of the aquatic community throughout the course of the stream.

The survey encompassed the entire length of Riley Creek from the area of its status as an intermittant waterway to its confluence with Cassel Creek. Sampling periods included the months of April, May, June, July, October and November.

Macroinvertebrate collections were made at six locations along the stream approximately equidistant from each other. The organisms were assigned tolerance levels as designated by the Illinois Environmental Protection Agency.

Physical and chemical …

Ecology Of A Mixed Gray And Fox Squirrel Population, Thomas R. St. Peter

Masters Theses

No abstract provided.

The Peristome Teeth Of Selected Genera Of Acrocarpous Musci Of East Central Illinois, Roger Mcbroom

Masters Theses

No abstract provided.

Oil-Bodies Of Selected Leafy Liverworts Of East-Central Illinois, Steven Monroe Martin

Masters Theses

Oil-bodies are distinct and varied structures found only in the Hepaticae and with particular frequency in the Jungermanniales. Untill relatively recently the oil-body has been virtually ignored by liverwort morphologists and taxonomists.

This study includes descriptions and photomicrographs of the oil-bodies of 23 species and 14 genera in 9 familes of leafy liverworts of east-central Illinois. Diagnostic characteristics recorded for each species include the number of oil-bodies per cell, size range of the oil-bodies, color, shape, texture and arrangement of the oil-bodies within the cell. It was found that the familes Lepidoziaceae, Calypogeiaceae, Jungermanniaceae, Scapaniaceae, Porellaceae and Frullaniaceae are composed …

Aquatic Plant Communities Of East-Central Illinois, Randolph Lee Vogel

Masters Theses

Aquatic plant communities of east-central Illinois were studied during the late summers of 1971 and 1976. Frequencies, relative frequencies and frequency of dominance were calculated for the various taxa. At the pond level, changes in the flora over the 5-year span have taken place, usually consisting of the addition or subtraction of one species. Overall, however, it was found that the aquatic community has remained relatively static, as has the percentage of ponds lacking aquatic plants. Factors influencing distributions and sterility are discussed and it was concluded that all the factors play varying roles, but no one factor or combination …

Ecology Of The Pirate Perch, Leslie D. Frankland

Masters Theses

No abstract provided.

Production And Utilization Of Sunflower Food Plots At Shelbyville Wildlife Management Area, Illinois, Duane T. Dust

Masters Theses

Three sunflower (Helianthus annuus) fields from 3.2 ha to 1.0 ha in size, planted on the Shelbyville Wildlife Management Area, Illinois were analyzed for seed production and utilization by birds. Seed in heads and on the ground were sampled and species and numbers of birds in the fields were censused at two week intervals from September, 1976 to February, 1977. Decline in seed availability was most rapid in the smallest field and least rapid in the largest field. Fields and portions of fields adjacent to wooded cover were also utilized more rapidly. American goldfinch (Spinus tristis) …

Germination Study Of Dormant Cercis Canadensis L. Seed, Glenn Hosokawa

Masters Theses

Cercis canadensis L. (redbud) seeds have been shown to require both scarification and stratification before germination occurs. Seeds which were leached prior to the scarification-stratification treatments were found to germinate more quickly, and CaSO₄ solution was found to enhance germination. However, the percent germination remained approximately the same and leaching failed to substitute for the stratification requirement. Extraction studies indicated that germination inhibitors were present in scarified-non stratified seeds, however, the presence of germination promoters in scarified-stratified seeds could not be demonstrated. Germination occurred in either light or dark conditions. Gibberellic acid was found to substitute for stratification, and …

Cytology Of Chaetomidium Fimeti, David D. Kimmel

Masters Theses

No abstract provided.

Saxicolous Bryophytes Of Coles And Clark Counties, Terri M. Simon

Masters Theses

No abstract provided.

Blood Parasites Of Squirrels From Coles And Lake Counties In Illinois, Nicholas I. Obiri

Masters Theses

Hepatozoon and microfilariae are described from the blood of fox and gray squirrels captured in Coles and Lake Counties in Illinois during 1976 and 1977. The hepatozoon species is identified as Hepatozoon griseisciuri on the basis of parasite morphology and hosts. A higher rate of infection (35.7% : 11.1%) was observed in gray squirrels than in fox squirrels and more adults were infected than juveniles. No microfilariae were found in gray squirrels but fox squirrels had a 57.1% infection rate with no difference based on age. The observed microfilariae are similar to that described by Davidson from Maryland gray squirrels …