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Full-Text Articles in Life Sciences

Development Of Environmental Education Field Trip Guides For Elementary School Teachers In Cache Valley, Utah, Sandra T. Brown May 1972

Development Of Environmental Education Field Trip Guides For Elementary School Teachers In Cache Valley, Utah, Sandra T. Brown

All Graduate Theses and Dissertations

The purpose of this study was two-fold. The first was the development of environmental education field trip guides to areas in Cache Valley for teachers in grades three through six that would provide learning activities that cannot be structured in the classroom. Six field trip guides to areas of Cache Valley with accompanying activities and discussion questions were constructed. The guides were tested in the field by three groups of teachers and students and teachers not participating in the field test evaluated the guides for difficulties they would encounter in using the guides.

The second study purpose was to determine ...


Ecology Of Aroga Websteri Clarke In Curlew Valley, Utah-Idaho, Reed L. Kirkland May 1972

Ecology Of Aroga Websteri Clarke In Curlew Valley, Utah-Idaho, Reed L. Kirkland

All Graduate Theses and Dissertations

The ecology, life history, and population dynamics of the sagebrush defoliator, Aroga websteri Clarke, were studied in the field and laboratory. The defoliator has one generation a year at the Curlew Valley site. It overwintered in the egg stage and passed through five larval instars. Ten parasite species attacked the defoliator at the study site . Four species, Orgilus ferus, Phaeogenes sp., Spilochalcis leptis, and Apanteles cacoeciae, contributed over 75 percent of the total incidence of parasitism. Parasitism ranged from 20 to 76 percent in 1971, but only ranged from 6 to 29 percent in 1972. This decrease in total parasitism ...


Early Life History Of The Mountain Whitefish Prosopium Williamsoni (Girard) In The Logan River, Utah, Lawrence Guy Brown May 1972

Early Life History Of The Mountain Whitefish Prosopium Williamsoni (Girard) In The Logan River, Utah, Lawrence Guy Brown

All Graduate Theses and Dissertations

Growth and food habits of 399 Age 0 mountain whitefish from the Logan River, Utah, were studied between March, 1970, and April, 1971. At the end of their first six months of life, whitefish were 86-96 mm total length and weighed 6-8 grams (wet). Total temperature experience was 2,950-3,430 degree- days above 32° F. The length-weight relationship for Age 0 mountain whitefish was best described by three stanzas with slopes of 4.3333 for fish 12.5-17.0 mm total length, 3.4437 for fish 17.0-55.0 mm total length, and 2.8043 for fish 50.0-112 ...


An Evaluation Of The Farm Machinery Market In Utah, Paul J. Stuart May 1972

An Evaluation Of The Farm Machinery Market In Utah, Paul J. Stuart

All Graduate Theses and Dissertations

The purpose of this thesis was to evaluate the farm machinery distribution system in Utah using market structure analysis. Questionnaires to farm machinery firms as well as to farmers were used to gather data on market structure and conduct. The traditional market structure theory was used as an analytical framework. Examining the efficiency of factor markets revealed possible avenues for savings to farmers.


Blue Grouse Ecology And Habitat Requirements In North Central Utah, David A. Weber May 1972

Blue Grouse Ecology And Habitat Requirements In North Central Utah, David A. Weber

All Graduate Theses and Dissertations

The ecology and habitat requirements of a population of blue grouse were studied during 1970 and 1971 on the Cache National Forest 25 miles south of Logan, Utah.

Baseline data concerning numbers of blue grouse, vegetative composition, and insect abundance on the study area were gathered. These data were to be compared to similar measurements made following a herbicidal spraying of the area during 1972.

Information concerning the breeding, nesting, brood rearing, and wintering habits of the grouse was also collected. Male blue grouse migrated to the study area in early April to set up territories. These were located on ...


Present Livestock Feed Balance, Projected Feed Requirement And Potential For The State Of Utah, Roberto Savelli C. May 1972

Present Livestock Feed Balance, Projected Feed Requirement And Potential For The State Of Utah, Roberto Savelli C.

All Graduate Theses and Dissertations

The objectives of this thesis ~

Present feed production was obtained from published data . Livestock feed requirements were calculated using factors published in Lives tock- Feed Relationships, a publication of the United States Department of Agriculture.

The projections of feed requirements to 1980 were made by projecting livestock numbers based on a least squares analysis of past trends. Utilizing the projected numbers permits calculation of t he feed requirements.

Feed production in 1980 was obtained by projecting past feed production and by applying least squares analysis to obtain a predicting equation that allows projection to 1980. Separate predictions were made for ...