Life Sciences Commons^™

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 …

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 …

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

Masters Theses

No abstract provided.

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 …

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 Bryoecology Of Montgomery County, Illinois, Elbert A. Traylor

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 …

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 …

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

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 …

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 …

Ecology Of The Pirate Perch, Leslie D. Frankland

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 …

Avian Succession On Lake Michigan Sand Dunes, John B. Van Orman

Masters Theses

No abstract provided.

Studies Of Michigan Lycosidae, Robert John Wolff

Masters Theses

No abstract provided.

Physiological Iron Deficiency Anemia In Suckling Beagle Pups, Timothy F. Porter

Masters Theses

No abstract provided.

Inhibition Of Gastric Secretion And Ulcer Formation By Lithium Chloride In The Rat, Thomas H. Adair

Masters Theses

No abstract provided.

Cortical And Subcortical Interhemispheric Interrelation In The Visual System, George C. Wagner

Masters Theses

No abstract provided.

A Three-Year Field Study Of Cacalia Atriplicifolia, L. With Emphasis On Dispersal Mechanisms, Joann T. Athey

Masters Theses

No abstract provided.

The Prevalence Of 47, Xyy Males Among Collegiate Basketball Players, Joy Ann Price

Masters Theses

No abstract provided.

Comparative Evaluation Of Glucose Stimulated Insulin Secretion In Nondiabetic, Diabetic, And Prediabetic Chinese Hamsters, Ronald Neil Prange

Masters Theses

No abstract provided.

The Microbiological Ecology Of Slime Formation In A Paper Mill, Alexander E. Maccubbin

Masters Theses

No abstract provided.

Ecology Of East-Central Illinois Hill Prairies, John Thomas Reeves

Masters Theses

No abstract provided.

Azide Sensitivity In Species Of Chlamydomonas And Carteria, Kim Michael Kobriger

Masters Theses

No abstract provided.

Breeding Birds And Vegetation Of The Central Illinois Floodplain Forest, Daniel Edward Varland

Masters Theses

No abstract provided.

A Comparison Of Age And Growth Of Largemouth Bass (Micropterus Salmoides) In Two Ponds In East-Central Illinois, Mark Fevold Nelson

Masters Theses

No abstract provided.

The Arthropod Ectosymbionts Of The Fox Squirrel In Coles County, Illinois, Jeanine L. Stanis

Masters Theses

The body surface areas of 18 squirrels (Sciurus niger) were calculated by regions, and the numbers and densities of the ectoparasite populations present on each region determined. Four species representing four genera of arthropods were recovered. The louse, Neohaematopinus antennatus was the most abundant organism with Orchopeas howardii, Haemagamasus reidi, and Dermacentor variabilis being also present. The average population density of all parasite species combined was highest on the back and decreased on the belly, tail, legs, and the head respectively. Body regions showing greatest average total population densities were different for males and females. The …

Land Snail Diversity At Rocky Branch Nature Preserve, Clark County, Illinois, Daniel J. Mott

Masters Theses

Terrestrial, shell-bearing gastropods were collected at Rocky Branch Nature Preserve, Clark County, Illinois. A total of three hundred nineteen specimens were collected representing five families and fifteen species. Two species of the family Endodontidae, eight species of the family Polygyridae, three species of the family Zonitidae, and one species in each of the families Pupillidae and Succineidae were collected.

In addition, an attempt was made to find the relationship between species diversity and dominant woody vegetation and soil quality. The land at Rocky Branch Nature Preserve ranges from lowland flood plain to high second growth forest. The dominant trees of …

Ecological Comparisons Of Four Plethodontid Salamanders In A Ravine In West Central Indiana, Stephen L. Reinbold

Masters Theses

No abstract provided.

Food Habits Of The Steelcolor Shiner, Notropis Whipplei (Girard), Mark A. Dyer

Masters Theses

Specimens of the steelcolor shiner, Notropis whipplei (Girard) were seined at irregular intervals from Polecat Creek (Coles County, Illinois) from October 1974 to September 1975. Drift and benthic samples were taken in conjunction with fish collections. The stomach contents of the fish were analyzed and compared to organisms found in the drift and benthos. More food taxa were represented in the fish collected during the summer. Aquatic insect forms, primarily chironomid larvae, amounted to 75.6% of the total percentage of foods eaten during the winter as compared to 18.8% for the summer. Adult insects, mainly coleopterans and dipterans, were the …