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Insect Pests : Snails And Slugs, Clee Francis Howard Jenkins

Journal of the Department of Agriculture, Western Australia, Series 4

WHILE snails and slugs are not insects, they have been included in this series of articles, because the damage they cause is very similar to that caused by insect pests—and furthermore, the task of testing and recommending control measures is usually left to the entomologists.

A Survey Of The Food Habits And Distribution Of The Fishes Of Tuckahoe Creek, Virginia, With Special Emphasis On Lepomis Macrochirus Rafinesque, David Andrew Flemer

Master's Theses

An integral part of the ecological study of any organism is a good understanding of the food relationships. Basic studies of the distribution and ecology of common fresh-water fishes are necessary before a more detailed analysis can be made of the fishes in a particular area. Lagler (1956) states that food habit studies help determine population levels, rates of growth, and condition of the fishes. He also concludes that they serve as a partial basis for determining the status of various predatory and competing forms. Raney (1942) states that an intelligent fishery management program depends heavily upon information gained through …

The Distribution And Ecology Of The Hispid And Least Cotton Rat (Genus Sigmodon) In New Mexico, John S. Mohlhenrich

Biology ETDs

Two species of cotton rats, Sigmodon minimus Mearns (least cotton rat) and S. hispidus Baird (hispid cotton rat), occur in the Rio Grande Valley of New Mexico. The northernmost published record-station for S. hispidus is near Scorro, Scorro County ( Bailey, 1931: 167), and that S. minimus is near Isleta, Bernalillo County (Ivey, 1947: 498 and map). When recent field work by the author revealed the presence of both species in the Rio Grande Valley north of these published record-stations the problem arose whether the range extensions were the result of a recent northward extension of the range of the …

Lethal Concentrations And Detoxification Time Of Toxaphene For Goldfish, Gambusia And Rainbow Trout, Gar W. Workman

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In the past few years the Utah Fish and Game Department, as well as the fish and game departments of other states, has been spending fisheries money for fish eradication on both lakes and streams. The Utah Fish and Game Department recently suggested to the University that research be initiated on the subject of toxaphene as a fish poison. Consequently, a better insight into conditions that exist for a given water type could be developed.

Observations On The Biology Of Pelomyxa Palustris Greeff, Collected Under Polysaprobic Conditions, Daniel Henry Stern

Master's Theses

Pelomyxa palustris Greeff, the largest rhizopod of which we have knowledge, was described in 1870 by Greeff who named the organism Pelobius. According to Penard (1902) it was redescribed by Archer in 1871 and reviewed. by Greeff (1874) who then gave it the name P. palustris.

The External Morphology Of The First Zoeal Stages Of Cancer Magister (Dana), Cancer Antennarius (Stimpson), And Cancer Anthonyi (Rathbun), Robert Dotson Mir

University of the Pacific Theses and Dissertations

The literature dealing with the larva of Pacific Coast brachyuran crabs is slight. The prominent papers, those of Aikawa (1927, 1928, 1929, 1933, 1937), deal with a variety of genera and offer information useful in determin- ing family relationships. A single paper by Hart (1935) also deal with a number of brachyuran larvae found in the Pacific Ocean. None of these papers, however, identifies to species any member of the genus Cancer, although one member, C. magister (Dana) is of considerable economic importance on the pacific coast of North America. In the fall of 1958 an investigation was under taken …

Bulletin No. 10: The Connecticut Arboretum, Richard H. Goodwin, William A. Niering, Fleur A. Grandjouan, Robert Fulton Logan

Bulletins

An annotated list with seasonal records and an account of the breeding bird census program. 24 pp.

Retention And Excretion Of Radionuclides Of The Alkali Metals By Five Mammalian Species, Chester R. Richmond

Biology ETDs

Large-volume liquid-scintillation counters were used to measure in vivo the biological half-time (BT_1/2), whole-body retention, and excretion of several gamma-emitting alkali-metal radionuclides in five species of animals.

Use Of The Antibiotics, Streptomycin And Terramycin, As Growth Stimulants For Orchid Seedlings, Margaret W. O'Neill

Biology ETDs

Antibiotics first came to the public's attention in 1945, when penicillin and streptomycin were released by the United States government to fight human diseases. Later, other antibiotics were released and experimental work was done on control of plant and animal diseases. By 1948 plant pathologists found that certain plant diseases such as walnut blight, tomato and pepper bacterial spot, soft rot, cucumber, downy mildew, chrysanthemum bacterial wilt, and lilac bacterial blight could be controlled by antibiotics.

Effects Of Ultraviolet Radiation On Growth In Partially Shielded Timothy Roots, Mary Beth Picinich

Theses & Honors Papers

No abstract provided.

An Ecological Study Of The Bottom Fauna Of Bear Lake Idaho And Utah, Earl W. Smart

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

In evaluating the potential ability of a lake to produce fish, probably no single standard is so important as an estimate of the amount of bottom fauna (Deevey and Bishop, 1942).

The study of the bottom fauna of Bear Lake was a part of the investigation of its limnology and fisheries, begun in 1952. This study was sponsored through federal monies made available through the Dingle-Johnson Act. The primary purpose of the study was to examine all the evidence in estimating the fish producing capacity of the lake. Bear Lake is the second largest fresh water lake in Utah but …

The Gross And Microscopic Morphology Of The Digestive System Of The Cutlips Minnow, Exoglossum Maxillingua (Le Sueur), Ira Lederman

Biology Honors Papers

This 18 page thesis describes taxonomy and anatomical characteristics of the minnow, including geographical distribution, ecology and feeding habits.

A Survey Of Serum Enzymes As A Possible Index Of Radiation Injury, Lora Belle Hughes

Biology ETDs

Early changes in the serum concentrations of glutamic-oxalacetic transaminase, glutamic-pyruvic transaminase, lactic dehydrogenase, and malic dehydrogenase were determined in young adult rats following exposures to sublethal, midlethal, and supralethal doses of X-irradiation, treatment with hepatotoxic agents or opiates, and sequential administration of both X-irradiation and the hepatotoxins. Changes in serum enzyme content were also determined in a series of 38 rhesus monkeys within 30 minutes after exposure to sublethal doses of fission neutrons.

Relatively small increases in serum enzyme concentration, detectable within 1 to 6 hours after whole body X-irradiation, were greatly exaggerated by prior treatment of the test animals …

A Comparison Of The Blood Oxygen Capacity In Semi-Terrestrial And Aquatic Frogs, Francis Burke Leftwich

Master's Theses

The present investigation is a comparison of the blood oxygen capacity in three species of frogs: a semi-terrestrial form R. pippins, the meadow frog; and two aquatic forms, R. clamitans, the green frog; and R. catesbeiana, the bullfrog. The habitats or these frogs are described by Wright and Wright (1949) as follows: R. pipiens inhabits swampy marsh lands, upland backwaters, overflows, and ponds in the spring. In summer it is found in swamp lands, grassy woodlands, or in cultivated hay and grain fields. In winter it hibernates in pools or marshes. It has been found as far as …

A Comparison Of The Blood Oxygen Capacity In Painted Turtles (Chrysemys Picta Schneider) And Box Turtles (Terrapene Carolina Linne), Harold J. Payne

Master's Theses

Among factors necessary for an animal to maintain life is the presence of an oxygen carrier that will transport a sufficient quantity of oxygen necessary for respiratory metabolism. In animals whose blood contains hemoglobin, which is a pigment that loads and unloads oxygen, this carrying capacity is referred to as blood oxygen capacity. It is a measure of the amount of oxygen that will combine with whole blood when completely mixed with air. It is usually expressed in volumes per cent (ml. 02/100 ml. blood) and corrected to standard temperature and pressure.

A search of available literature revealed that there …

Studies On The Periodicity Of Certain Plankton Species Of Salem Lake, Gene A. Pratt

Theses and Dissertations

Plankton samples were taken periodically from one station in Salem Lake from the fall of 1955 through the winter of 1957. Other data including the pH, dissolved oxygen content, turbidity, brightness of day, temperature, and time of day were recorded at the time of each collection. The plankton samples were centrifuged and preserved in a 4% formalin solution. They were later examined microscopically, and density, percent density, and percent frequency calculations were made from them for ten selected species and for the five phyla which they represent.

The Effects Of Desoxycorticosterone Trimethylacetate, Desoxycorticosterone Acetate, Cortisone Acetate, And Adrenalectomy On The Liver Succinoxidase And Glutamic Dehydrogenase Activity Of Rats Fed 3'-Methyl-4-Dimethylaminoazobenzene (3'-Me-Dab), John P. Davanzo

Biology ETDs

Experimental production of liver cancer by means of azo dyes is a standardized and convenient method for study of the cancer problem. The rat is the animal of choice for this type of experimentation because this animal is readily susceptible to liver carcinogenesis upon being fed azo dyes. Mice are only partially susceptible and rabbits and guinea pigs will not develop cancer of the liver by ingestion of the azo dyes (E. C. Miller and J. A. Miller, 1947, p.473). The liver, likewise, is an appropriate organ for study. Enzymologists and cytologists today regard the liver cell as the best …

Preliminary Experiments On The Possibility Of Inducing An Abdominal Pregnancy In The Adult Male Golden Hamster By The Transplantation Of Presumptive Embryonic Tissue From The Female, Richard T. Padula

Biology Honors Papers

This 21 page thesis describes an experiment conducted to determine whether ectopic pregnancy can be induced in a male hamster through transplantation of a fertilized egg from a female hamster.

Ecosystem Studies At Cedar Creek Natural History Area, Donald B. Lawrence, J. Roger Bray, L. C. Pearson

Journal of the Minnesota Academy of Science

No abstract provided.

A Report On Fossil Bison From A Peat Bog In St. Paul, Minnesota, Philip S. Taylor

Journal of the Minnesota Academy of Science

No abstract provided.

Some Factors Affecting The Utilization Of Space By Mice Of The Genus Peromyscus, Howard D. Orr

Journal of the Minnesota Academy of Science

No abstract provided.

Notes On Diurnal Movement, Of Minnows In Shallow Waters Of A Bog Lake In North Central Minnesota, Arthur R. Peterson

Journal of the Minnesota Academy of Science

No abstract provided.

A Critical Study Of The Chromosomes In Two Species Of Myxophyceae, John Thomas Mullins

Master's Theses

The Myxophyoeae or blue-green algae have been frequent subjects for cytological investigation since Schmitz (1879) first called attention to two regions in the protoplast. Since that publication the morphological and chemical nature of the genetic material and the mechanism of cell division in the Myxophyceae has been a controversial subject, The evidence that has been presented is, tor the most part, more voluminous than enlightening.

This investigation was undertaken in order to verify the methods and check the results obtained with the smear technique by Strickland (1948). Additional methods were also applied which might enable a more critical evaluation of …

Studies On The Trematode Larva Neascus, Thomas Reyes

University of the Pacific Theses and Dissertations

During the spring semesters of 1955 and 1956, while the writer was under the supervision of Dr. A. E. Noble, a preliminary survey was initiated on parasites in local fishes, amphibians, and reptiles occurring in the vicinity of Stockton, California. The collection of specimens in this survey included sixteen green sunfish, Lepomis cyanella, and two bluegills, L. macrochirus. Larval trematodes recovered from the heart and liver of these specimens belonged to the family Diplostomatidae Poirier (1886) which is characterized by a conspicuous constriction separating the fore and hind-bodies. The leaf-like forebody with the lateral borders converging ventrally to form a …

The Value Of Including Chemistry Content In The Study Of High School Biology, Ramon Duane Buckley

Dissertations and Theses @ UNI

The purpose was to evaluate the effect of including some definite chemistry content in high school biology. This evaluation was made by comparing outcomes of instruction in two different groups of a high school biology course. The two groups were equated in terms of the intelligence quotients, the sex, and the previous achievement in biology of the class members. The comparative gains in factual knowledge were measured by means of an evaluation test. The comparative gains in appreciations and interests in biology were measured with a questionnaire.

The Effect Of Adrenal Steroid Hormones On The Protein Content Of Tumorous Livers, Duncan W. Martin

Biology ETDs

Protein is basic to the structure and function of protoplasm. Enzyme systems which regulate the rate of cellular reactions are primarily composed of protein and many of these enzymatic systems influence the metabolism of less specialized proteins that form the major structural material of protoplasm. It is believed that experimental procedures which modify protein composition of cells may also influence the activity of intra-cellular enzymes. In experimental live cancer, it has been shown that the activities of a number of oxidative enzymes are modified as the carcinogenic process proceeds (Richmond, 1955, p.38). Furthermore, it has been demonstrated that endocrine function …

Handbook Of Bacteriology For High School Teachers, David Loring Fagle

Dissertations and Theses @ UNI

The study of bacteriology is frequently not included in the high school science curriculum and often, when it is taught, it is dealt with in only a superficial manner. There are various reasons for this. Very often high school science instructors lack training in courses relating to bacteriology and consequently, feel inadequate to handle the topic with their students. Another factor rests with the fact that bacteria are difficult to study without the aid or microscopes with high power objectives. Many high schools lack this equipment. A third factor is that some parents may feel that it may be dangerous …

Some Photographic Materials And Techniques For High School Biology Teachers, Robert L. Calentine

Dissertations and Theses @ UNI

Biology teachers in the smaller high schools are often confronted with the problem of securing sufficient classroom teaching material: charts, specimens, and reference books. A relatively inexpensive method of obtaining resource material would prove valuable to teachers confronted with this problem. Granting that actual study of specimens is of greater value than indirect methods, it is often helpful to have a supply of supplementary visual aids.

A Study Of Spermatogenesis In The Charales, Robert Korn

Bachelors’ Theses

Investigations on the nature of the antherozoid, or male gamete, in the Archegoniates has been of great cytological interest to numerous workers. An apparent consistency of certain characteristics in the antherozoids of the Bryophytes and the Pteridophytes has, also, undoubtably been of value in determining phylogenic relationships.

Notes On Some Leeches (Hirudinea) From The Yukon Territory, Canada, And Alaska, M. M. Keith

Journal of the Minnesota Academy of Science

No abstract provided.