Life Sciences Commons^™

Survival Of Trout Strains As Affected By Limnological Parameters, Wayne A. Wurtsbaugh

Watershed Sciences Faculty Publications

Prior work at East Canyon Reservoir, Utah indicated that adult trout are important predators of stocked juvenile rainbow trout. Brown trout, in particular, were exclusively piscivorous when th~y exceeded 185 mm standard length. Fish became increasingly important in the diet of cutthroat trout greater than 330 mm. The purpose of this study was to further document the effect of adult trout on survival of juvenile rainbow trout in mid-elevation reservoirs. Causey Reservoir was chosen because it was thought to contain large brown and cutthroat trout and had not been intensively studied during the last eight years.

Effect Of Conidia Germination On Infection Of Brown Planthopper (Bph) By Insect Fungi, M. C. Rombach, R. M. Aguda, Donald W. Roberts

Biology Faculty Publications

Conidia of insect fungi actively invade BPH [brown planthopper]. After a conidium lands on the insect cuticle, germination takes about 8 to 16 h, depending on the temperature and relative humidity. After the germination, tuber is formed, the conidium produces specific chitinase enzymes to dissolve the insect cuticle. This allows the fungus to enter the insect body cavity, where further fungus growth occurs. At the end of the infection cycle, the mycelium sporulates on the outside of the insect. Conidia produced on the cadaver can infect healthy BPH initiating epizootics of the fungus. To test infection, 50 adult alate BPH …

Fat & Cholesterol, Georgia C. Lauritzen Ph. D., Kris Saunders

Archived Food and Health Publications

Publication gives information on the different types of fat and cholesterol and the health effects of both.

Utah Tart Cherries, Georgia C. Lauritzen Ph. D.

Archived Food and Health Publications

Publication gives information and instruction on how to select, handle, serve, freeze, and can Utah Tart Cherries.

Apples, Georgia C. Lauritzen Ph. D.

Archived Food and Health Publications

Publication gives information on apples, including seasons, storing, canning, freezing, and whitening.

Sodium, Georgia C. Lauritzen, Kris Saunders

Archived Food and Health Publications

Publication discusses the health effects of sodium in the diet.

Utah Peaches, Georgia C. Lauritzen Ph. D.

Archived Food and Health Publications

Publication gives information on selecting, freezing, canning, drying, and consuming peaches.

The Fibers, Georgia C. Lauritzen Ph. D.

Archived Food and Health Publications

Publication gives information on the different types of fiber and how the body uses each of them. It also lists common foods that provide fiber for the body.

Report And Planning Meeting, Various Authors

Other Documents

No abstract provided.

Deer And Forestry In Germany: Half A Century After Aldo Leopold, Michael L. Wolfe, Friedrich-Christian V. Berg

Aspen Bibliography

No abstract provided.

Proceedings--Future Forests Of The Mountain West: A Stand Culture Symposium, U.S. Forest Service

All U.S. Government Documents (Utah Regional Depository)

Presents best information available about young dynamic western forests and charts the future of forestry in western North America.

Eat A Healthful Diet- An Absolute Cure, Georgia C. Lauritzen Ph.D

Archived Food and Health Publications

Publication gives tips and suggestions for eating a healthful diet.

Proceedings From The 25th Annual Italian Cheese Seminar, Various Authors

Cheese Industry Conference

No abstract provided.

8th Biennial Cheese Industry Conference, Various Authors

Cheese Industry Conference

No abstract provided.

A Seasonal Comparison Of Metabolic And Water Loss Rates Of Three Species Of Grasshoppers, Lynn J. Forlow, James A. Macmahon

Green Canyon Environmental Research Area, Logan Utah

1. 1. Seasonal differences in metabolic and water loss rates were examined in three related species of grasshoppers collected from shrub-steppe communities in Utah: Arphia conspersa, A. pseudonietana and

2. 2 cohorts of Trimerotropis pallidipennis. 2. No significant differences (P = 0.05) in metabolic rates were observed between seasons (early vs late), between genera (Arphia vs Trimerotropis) nor among species.

3. 3. Early season (spring) grasshoppers had a higher (but non-significant) mean water loss rate (±X ± SD in mg.g−1-hr−1) (4.81 ± 1.53) than late season (summer) grasshoppers (4.43 ± 1.43).

4. 4. Among species, early season A. conspersa had …

Pear Sawfly, Vincent P. Jones

All Archived Publications

No abstract provided.

A Mass Mortality Of Fishes In Lake Titicaca (Peru-Bolivia) Associated With The Protozoan Parasite Ichthyophthirius Multifiliis, Wayne A. Wurtsbaugh, R. Alfaro

Watershed Sciences Faculty Publications

In December 1981 , an epizootic of the protozoan parasite Ichthyophthirius multifiliis killed an estimated 18 million killifish Orestias spp. in Lake Titicaca, a high-altitude tropical system. Of the dead fish collected, 93% were adult O. agassii, a commercially important species that is abundant in the littoral zone. Juvenile Orestias spp., pelagic species, and some other littoral zone fis hes were slightly affected. lchthyophthirius multifiliis was probably introduced with exotic fishes brought to Lake Titicaca in the 1940s and 1950s.

Douglas-Fir Beetle (Dendroctonus Pseudotsugae Hopkins, Coleoptera : Scolytidae) Brood Production On Douglas-Fir Defoliated By Western Spruce Budworm (Choristoneura Occidentalis Freeman, Lepidoptera : Tortricidae) In Logan Canyon, Utah, S E. Fredricks, M J. Jenkins

The Bark Beetles, Fuels, and Fire Bibliography

Douglas-fir beetle brood production was studied on Douglas-fir (Pseudotsuga menziesii [Mirb.] Franco) trees defoliated by the western spruce budworm between 1983 and 1985. Tallies were made of the number of attacks, total length and number of egg galleries, number of eggs deposited, number of larval tunnels, number of pupal chambers, and number of emerging beetles (per female and per unit area). Data analysis showed no significant differences among the three years studied. The number of emerging beetles per female parent was 0.59, and emergence per 90 cm2 was 2.32 beetles. Egg, larval, and pupal survivals were 47.5%, 30.0%, and 15.5%, …

Lodgepole Pine Vigor, Regeneration, And Infestation By Mountain Pine Beetle Following Partial Cutting On The Shoshone National Forest, Wyoming, Gene D. Amman, Gene D. Lessard, Lynn A. Rasmussen, Curtis G. O'Neil

The Bark Beetles, Fuels, and Fire Bibliography

Lodgepole pine stands were thinned in the Shoshone National Forest of northwestern Wyoming in 1979 and 1980 using different forms of partial cutting. Average losses of trees 5 inches diameter at breast height and larger to mountain pine beetles during the 5 years following thinning ranged from less than 1 percent in spaced thinnings to 7.4 percent in the 12-inch diameter limit cut, compared to 26.5 percent in check stands. Residual trees increased radial growth significantly, but change in growth efficiency is slow. Regeneration 5 years after thinning ranged between 1,160 and 3,560 seedlings per acre, with pine being favored …

Nutrition Myths And Misinformation, Charlotte P. Brennand

Archived Food and Health Publications

Publication discusses common myths involving nutrition. It also discusses what information to trust and what information to question.

Selecting For Carcass Merit, Norris J. Stenquist

Archived Agriculture Publications

Today's consumers are asking for leaner, less-fatty beef. Much of the leaner beef now produced results from trimming excess fat before the product is sent to the consumer. For the future, the hope is to trim excess fat genetically by producing leaner, more heavily muscled beef cattle.

Diseases And Plant Population Biology, Nancy J. Huntly, R Inouye

Biology Faculty Publications

No abstract provided.

Breeding Birds In Uncut Aspen And 6- To 10-Year-Old Clearcuts In Southwestern Colorado, V.E. Scott, G.L. Crouch

Aspen Bibliography

Numbers of breeding birds were estimated for various sizes and ages of clearcuts, for edge habitat created by the clearcuts, leave strips between clearcuts, and uncut aspen forest (controls). Total numbers of birds were not different among three size classes or five age classes of clearcuts. Total were lower on clearcuts than on edges but not different from controls or leave strips.

Progress In Bleaching Pulps With The Sulfite-Air System, E. L. Springer, J. D. Mcsweeny

Aspen Bibliography

The effects of pulp pretreatment. pulp consistency. and quantity of sulfite added on final pulp brightness were studied using the cupric ion catalyzed sodium sulfite-air bleaching system. Aspen kraft pulp that had been partially delignified by chlorination and alkaline extraction was used. Highest brightnesses were attained by pretreating the pulp with cupric ion and by using the highest practical consistency. Brightness increased. but at a decreasing rate, with increases in added sulfite. A search was made for other catalysts. Nickelous ion vas found to be effective. but not quite as good as cupric ion. Spruce and aspen kraft pulps. partially …

Soil Temperatures And Suckering In Burned And Unburned Aspen Stands, Roger D. Hungerford

Aspen Bibliography

No abstract provided.

Aboveground Biomass And Production From 1938 To 1984 For Four Aspen Plots In Northern Lower Michigan, T.W. Jurik, G.M. Briggs, D.M. Gates

Aspen Bibliography

No abstract provided.

Tall Shrub Dynamics In Northern Minnesota Aspen And Conifer Forests, J.C. Balogh, D.F. Grigal

Aspen Bibliography

No abstract provided.

Aspen Community Types Of The Intermountain Region, Walter F. Mueggler

Aspen Bibliography

Western wildlands are covered by a broad spectrum of vegetation zones, from dense forests to barren deserts.

Breeding Birds And Small Mammals In Pole-Sized Lodgepole Pine And Small Inclusions Of Aspen In Central Colorado, V.E. Scott, G.L. Crouch, Usda For. Serv. Rocky Mt. For. Range Exp. Stn.

Aspen Bibliography

No abstract provided.