Physical Sciences and Mathematics Commons^™

Atomic Absorption As An Index Of The Silver Concentration In Precipitation, Silver Iodide Plume Studies, Part 1, Joel E. Fletcher, H C. Millar

Reports

The Perkin Elmbver Model 303, equipped with the DCR-1, digital concentration readout, was evaluated as to its ability to provide an index of silver concentration in water solutions, without concentrating in any manner. The procedures, principal settings, and adjustments which must be observed are described.

This instrument can detect the difference between concentrations of 10-15 and 10-12 gm/ml. However, as the concentration of silver decreases the experimental error increases to a point at which the error becomes greater than the differences in readout due to differences in silver concentration.

Limnology Of Selected South Dakota Lakes, Artwin E. Schmidt

Electronic Theses and Dissertations

Physical, chemical, and biological aspects of 45 lakes in South Dakota were studied from July 1965 to July 1967. Maximum water temperature at the surface reached 28 C. Most of the lakes studied exhibited continuous circulation except when ice covered. Thermocline formation was observed in six of the lakes. Light transmission was influenced by turbidity, and varied greatly within individual lakes and among lakes. Dissolved oxygen concentrations ranged from near saturation to less than the recommended minimum for fish life. All likes studied were basic ranging from a pH of 7.1 to 11.3. Specific conductance of lakes occupying open basins …

Effects Of Dieldrin On Reproduction Of Penned Hen Pheasants In The Second Generation, William Lyman Baxter

Electronic Theses and Dissertations

Effects of dieldrin on penned hen pheasants (Phasianus colchicus) which were the offspring of hens receiving encapsulated dieldrin the previous year were measured. Hens produced by the previous year's control group received 0, 6, 8, or 12 mg of dieldrin per week for 14 weeks. Hens from treated groups received 0 or 6 mg per week. Effects of dieldrin were evaluated by influences upon reproductive success. Mortality occurred in all groups receiving dieldrin, and appeared to be correlated with a reduction in egg production. Dieldrin lowered egg production by reducing food consumption in the 12 mg group and two groups …

Snapping Turtle Life History On Lacreek Refuge, South Dakota, Donald Arthur Hammer

Electronic Theses and Dissertations

Investigations of the snapping turtle population on Lacreek National Wildlife Refuge in south-central South Dakota were conducted during 1965-67. Turtles captured by trapping, “hooking”, boxing nests and catching nesting females were measured, marked and released. Turtles were marked by toe-clipping, routing, flagging, and tagging. Attaching a metal tag with a “pop-rivet gun” was the most successful marking technique. Molluscs (95 percent frequency) and vegetation (91 percent frequency) were the most important food items of 22 turtles captured on Valentine Refuge in north-central Nebraska. Bird remains were found in 23 percent of the stomachs. Recapture of marked turtles indicated that individual …

Evaluations Of Techniques For Estimating Fall Age Ratios Of Canada And Snow Geese, Kenneth Frederick Higgins

Electronic Theses and Dissertations

Validity of flock counts, average group-size counts, cannot-net catches, and hunter-bag checks for estimating productivity of lesser snow geese (Anser caerulescens caerulescens) and small Canada geese (Branta cnadensis hutchinsii-parvipes complex) was studied at Sand Lake and Tewaukon National Wildlife Refuges during fall, 1965 and 1966. Age-ratios obtained from flock counts vaired with the number of flocks sampled, wind velocity and amount of sky cover. If adequate sampling sites are selected and weather conditions are standardized, age ratio data from flock counts are of value for assessing productivity. Variation in group composition and number contributed to the bias in average group-size …

Survival, Growth, And Food Habits Of Brook Trout Introduced Into An Eastern South Dakota Stream, Larry W. Kallemeyen

Electronic Theses and Dissertations

Brook trout were introduced into the South Fork Yellow Bank River, an eastern South Dakota stream, on October 11, 1966. A supplemental brook trout plant was made on June 8, 1967. Survival for the initial plant from October, 1966 through October, 1967 was 2.4%. Survival for the supplemental plant from June, 1967 through October, 1967 was 21.0%. Trout from both plants took part in spawning activities during the fall of 1967. Average length of trout from the initial plant increased 9.8 cm during one year. Their average condition factor reached a peak in June, 1967 after being low throughout the …

A Study Of The Removal Of Pesticides From Water, James David Whitehouse

KWRRI Research Reports

The purpose of this study was to investigate some of the properties of pesticides as they exist in water, and to determine the effectiveness of several water treatment processes in the removal of pesticides from water. Among the pesticides investigated were malathion, DDT, aldrin, dieldrin, captan, benzene hexachloride (BHC), 2,4-D, and 2,4,5-T. The water treatment processes included aeration, chemical coagulation, adsorption on activated carbons and clays, and foam separation.

The removal of pesticides from water by aeration was found to be significant. Dieldrin was removed almost 100 percent, while aldrin, DDT, and BHC were removed to a lesser extent. 2, …

The Occurrence And Distribution Of Methane In The Marine Environment, Larry P. Atkinson, Francis A. Richards

CCPO Publications

The distributions of methane dissolved in the sulfide-bearing waters of the Black Sea, the Cariaco Trench, and Lake Nitinat are reported. The gas was not detected in the oxygen-deficient water of the eastern tropical Pacific Ocean, in the Santa Barbara Basin, nor in the sulfide-bearing water of Saanich Inlet. Maximum concentrations observed were 70 μmole CH4/l., and the distribution tends to follow that of sulfide. The data indicate that methane is derived from organic compounds not containing nitrogen or phosphorus and that its formation is much slower than that of sulfide. The solubility coefficient in seawater (salinity = 40‰) is …

Water Quality Study Of Lake Mead, Dale A. Hoffman, Paul R. Tramutt, Frank C. Heller, Bureau Of Reclamation

Publications (WR)

This report presents Lake Mead Water quality data obtained from 1964 to 1966. The effect of filling Lake Powell on the water quality of Lake Mead is evaluated. General limnological principles and the present limnology of Lake Mead are discussed. Lake Mead has a warm monomictic annual temperature cycle characterized by summer stratification, fall overturn leading into a continuous circulation throughout the winter; temperatures never fall below 39 deg F (4 deg C). During stratification, lower dissolved oxygen values were recorded in the thermocline than in the epilimnion and hypolimnion. Mineral content increases from the upper to the lower end …

L.A. General Data, Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

Analytical Data, Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

Pool Studies, Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

Mill Pollution, Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

Biochemical Activity, Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

Press Reports, Walter A. Lawrance

Walter Lawrance Papers

No abstract provided.

Waterways: Comprehensive Regional Plan Series Report Four, East Central Florida Regional Planning Council

City and Regional Planning -- Florida

A plan to make use of the lakes, rivers, canals, and oceans for commerce and other development

A Noteworthy Record Of The Swift Fox In Mcpherson County, Nebraska, Lawrence J. Blus, Glenn R. Sherman, John Henderson

Nebraska Game and Parks Commission: Staff Research Publications

An adult female swift fox (Vulpes velox) was killed by an automobile 1 mile E Ringgold, McPherson Co., Nebraska, on 25 March 1966. Standard external measurements (mm) of this specimen are: 723, 275, 132, 59, and weight, 2000 g. This record is approximately 80 miles south of the nearest occurrence listed by Jones (Univ. Kansas Publ., Mus. Nat. Hist., 16: 1-356, 1964) and appears to be the first verification of the occurrence of this fox in the Nebraska Sandhills, although specimens have been taken on all sides of this area. Jones (1964) indicated that this species may have …

Definite Plan Report On Southern Nevada Water Project, Nevada (First Stage): Project Development Report, U.S. Bureau Of Reclamation

Publications (WR)

This report presents the results of definite plan studies of the Southern Nevada Water Project in Clark County, southeastern Nevada. Construction of this project was authorized under Public Law 89-292 dated October 22, 1965. Authorization of the Southern Nevada Water Project was based on a project plan outlined in the feasibility report of August 1963 as supplemented in April 1965. The definite plan studies have confirmed the general project plan of the 1963 report as supplemented but some important modifications are now contemplated as explained in Part IV.

The project will be constructed in three stages. Stage development is desirable …

Water Resources Of Tacoma, Washington, Richard Martin Glaser

Graduate Student Research Papers

This study explores the fresh water and hydroelectricity resources of the City of Tacoma, Washington. The history and development of the water supply and hydroelectric facilities is examined. One can see that the development of the water resources has been directly affected by the growth in population and industry and that the nearness to the city of development sites has been an aid in this development. With the amount of water available at present and the increase in hydro-electric facilities during this decade, the future outlook for Tacoma in the field of water resources seems bright.

Closing Remarks - Third Vertebrate Pest Conference, Richard H. Dana

Vertebrate Pest Conference roceedings: 3rd (1967)

The record of this meeting will stand as a tribute to all of those who participated in the Third Vertebrate Pest Conference. It should remind them for years to come of their worthwhile contributions.

Proceedings: Third Vertebrate Pest Conference -- Frontmatter & Contents

Vertebrate Pest Conference roceedings: 3rd (1967)

Sponsored by the California Vertebrate Pest Technical Committee

Maynard W. Cummings - Chairman

Richard H. Dana - Vice Chairman

Rex E. Marsh - Secretary-Treasurer

GENERAL CHAIRMAN OF CONFERENCE - Maynard W. Cummings, Assistant State Director, Agricultural Extension Service, University of California, Davis, California. VICE-CHAIRMAN OF CONFERENCE - Richard H. Dana, Vertebrate Pest Control Specialist, California Department of Agriculture, Sacramento, California. PROGRAM CHAIRMAN - Charles C. Siebe, Vertebrate Pest Control Specialist, California Department of Agriculture, Sacramento, California. PUBLICITY CHAIRMAN - Rex E. Marsh, Associate Specialist, Department of Animal Physiology, University of California, Davis, California. ARRANGEMENTS CHAIRMAN - Jerry P. Clark, Agricultural …

Opening Remarks - Third Vertebrate Pest Conference, Maynard W. Cummings

Vertebrate Pest Conference roceedings: 3rd (1967)

To open this Third Vertebrate Pest Conference is a real privilege. It is a pleasure to welcome all of you in attendance, and I know there are others who would like to be meeting with us, but, for one reason or another cannot be. However, we can serve them by taking back the results of discussion and by making available the printed transactions of what is said here. It has been the interest and demand for the proceedings of the two previous conferen- ces which, along with personal contacts many of you have with the sponsoring committee, have gauged the …

Aircraft As A Means Of Baiting Ground Squirrels, Rex E. Marsh

Vertebrate Pest Conference roceedings: 3rd (1967)

Aircraft might soon become an important tool for baiting ground squirrels (Citellus beecheyi beecheyi and C. b. fisheri) on California rangeland. Until recently, almost all squirrel control has been conducted by the hand-baiting method, with grain bait scattered from horseback in spoon-size amounts near squirrel burrows. Ground squirrels are considered a major pest of rangeland in many parts of the West. They not only compete with livestock for forage but also are responsible for substantial losses to cereal and other crops. The magnitude of the problem is exemplified by the fact that, in California alone, over 6,000,000 gross acres of …

Problems In County-Wide Rodent Control Programming, Loring White

Vertebrate Pest Conference roceedings: 3rd (1967)

Vertebrate pest control is recognized and sanctioned as a legitimate function of county government in California, not only by statute but also by a century of tradition. This is an anomaly. Ordinarily, regulatory agricultural pest control programs are part of our plant quarantine system, undertaken against newly introduced pests or those which are not of common occurrence. Programs against vertebrate pests, on the other hand, are carried on where the species involved are common, usually are abundant and often are indigenous. The reason for this lies buried in a bit of history that is very pertinent to my subject.

Epizootic Ecology In The Training Program Of The Vector-Borne Disease Section, Harold E. Stark

Vertebrate Pest Conference roceedings: 3rd (1967)

To fulfill the primary objective of the Vector-Borne Disease Section of NCDC to reduce the incidence of vector-borne diseases - a series of courses on vertebrates and arthropods and their role as reservoirs, vectors, and disease-causing agents is presented. Literature is prepared and a museum is maintained. One of these courses, Epizootic Ecology, illustrates some of the aspects dealt with in these courses. Definitions and concepts are presented followed by a brief review of principles of epidemiology and ecology. Specific examples constitute the bulk of the course. One of these, tularemia, is especially useful for the purposes of this course …

The Current Status Of Plague In California, Keith F. Murray

Vertebrate Pest Conference roceedings: 3rd (1967)

At the first Vertebrate Pest Control Conference in 1964, I traced the history of plague control in California and outlined a revised approach, based on newer concepts of plague ecology. In our state of relative ignorance, this required a number of unproved assumptions about plague occurrence in California that verged on crystal ball gazing. These were principally that (1) plague persists in relatively resistant rodent species in certain favorable locations, (2) ground squirrels and chipmunks experience periodic epizootics, but are not permanent reservoirs, (3) plague "foci" of the past were merely sites of conspicuous epizootics, they did not necessarily correspond …

The Current Status Of Wild Animal Rabies In California, George L. Humphrey

Vertebrate Pest Conference roceedings: 3rd (1967)

During the 15-years 1952-1966, a total of 3504 cases of animal rabies were reported in California, an average of over 230 cases annually (Table 1). Of these 3504 cases, 2255 or nearly 65 percent were reported in wildlife species. An estimate sometimes used is that for every reported or recognized case of wild animal rabies, 10 cases probably occurred without recognition. Using the foregoing "rule-of-thumb", it can be hypothesized that during the 15-years 1952-1966, an estimated 22,600 or more cases of wildlife rabies occurred in California. The addition of the over 1200 cases of rabies reported in domestic animals during …

Good Practice In Vertebrate Pest Control, Philip J. Spear

Vertebrate Pest Conference roceedings: 3rd (1967)

Good practice in pest control is a responsibility of several elements in our democratic, free-enterprise society. Most notably, these are: (1) the general public, (2) responsible government agencies and (3) industry. Before I comment about the responsibilities of each of these three groups, let me tell you about the work of structural pest control operators and their interests in vertebrate pest control. The pest control industry which I discussed in detail at the Second Vertebrate Pest Control Conference (1) continues to grow and expand its fields of activity. At the present time, it is our estimate (2) that 26,700 persons …

Review Of Animal Repellents, Jack F. Welch

Vertebrate Pest Conference roceedings: 3rd (1967)

A review of the literature on this subject reveals there is considerable confusion regarding the meaning of the word "repellent" as it relates to animal control. Some people make a liberal interpretation and include any material or device that will alter the pattern of activity of an animal through response to sight, sound, taste, odor, or touch. Although such an interpretation may be valid, for this paper I would like to confine my discussion to "chemical repellents" -- materials that, when applied to seeds, plants, or other materials being damaged by animals, will reduce depredation through taste, odor, or possibly …

Animal Control - Progress, Problems And Professionalism, Robert M. Sutton Jr.

Vertebrate Pest Conference roceedings: 3rd (1967)

I want to take some liberty with my title as it is rather general. Specifically, I want to discuss some matters of mutual concern, and I will touch lightly upon our Division's activities and the status of our reorganization and redirection. In so doing, I do not propose to rehash the several talks that have been previously given and the papers written on what's new in animal control. Rather, I shall use this opportunity to examine a few problems that confront our Division, and in many cases, that confront everyone concerned with vertebrate pest control. We are now, in a …