Physical Sciences and Mathematics Commons^™

The Effects Of Flouride Ion On Some Blood Constituents Of Rainbow Trout, Salmo Gairdneri, Linnaeus, Richard H. Alger

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

During the past quarter of a century there has been considerable investigation into the effects of fluorides on living organisms. It has been well established, as a result of these studies, that both small and elevated amounts of fluorides present in the environment may have a marked toxic effect upon gaining entry into the organism. Much of the research involving fluorides and the living organism has been confined to experimentation with animals, although considerable evidence indicates that plants are also subject to injury if fluorides are present in the atmosphere or the soil.

The great majority of the research dealing …

Preliminary Report: Monolayer Behavior Studies, 1959, Bureau Of Reclamation

Publications (WR)

During the fall of 1959, monolayer behavior studies were made on two lakes in the southwest; Boulder Basin of Lake Mead, Nevada, and Lake Sahuaro near Phoenix, Arizona.

These studies were made to evaluate the effect of geographical and climatological conditions on movement and behavior of monolayers. The Lake Sahuaro tests also were used to provide data for design and development of improved methods of application and maintenance of a film on this lake in anticipation of full scale, evaporation-reduction tests to be performed there during the summer of I960.

The Lake Mead studies produced the following general points of …

Contour Banks For Filling Dams, B A'B Marsh

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

A LTHOUGH contour banks have been used in this State for many years to lead water into earth tanks or "dams," it is only comparatively recently that the idea has become really popular.

Thanks to the publicity given to this matter during the last three years many farmers now know that dams may be filled by contour banks, but because they do not know the finer points of the method, they are apt to mislead themselves into thinking that their territory is unsuitable for putting it into practice.

Some Limnological Conditions Relative To Winter Kill Of Fish In Ice-Covered Representative Farm Ponds In Eastern South Dakota, Jerome L. Johnson

Electronic Theses and Dissertations

An aquatic environment involves many complex relationships biologically, physically, and chemically. Many of these relationships are difficult to measure or are little understood. In nature, aquatic environments accommodate many types of aquatic life. Ecological disturbances may cause the environment to become unfit for economically important forms of life. Human interferences often causes polluted waters and naturally occurring disturbances are common. A disturbance of this kind is one of the major problems of fisheries management in the northern Great Plains area – seasonal anaerobosis of fish or other aquatic animals and plants, commonly known as winter kill. Winter kill is usually …