Index Catalog // ScholarsArchive@OSU

Evidence for the nonessentiality of ascorbic acid in the diet of the rainbow trout, Salmo gairdneri

Creator:: Primbs, Edward R. J.
Abstract:: Numerous tests were applied to rainbow trout of eleven months of age to determine whether ascorbic acid is an essential element of the diet of these fish. Although previous work had been done on this question, conflicts in the results, the large reliance upon abnormal symptoms such as lordosis and...
Resource Type:: Masters Thesis

Estimation of transmission dynamics of the Ceratomyxa shasta actinospore to the salmonid host

Creator:: Ray, R. A. and Bartholomew, J. L.
Abstract:: Transmission dynamics of the actinospore stage of Ceratomyxa shasta to the salmonid host were investigated under field and laboratory conditions. The number of parasites transmitted and the transmission rate were compared between 2 different exposure durations and also among different water velocities, by means of field exposures. Under laboratory conditions,...
Resource Type:: Article
Full Text:: Ceratomyxa shasta actinospore to the salmonid host R. A. RAY1 and J. L. BARTHOLOMEW2* 1Department of

Agricultural land use and macroinvertebrate assemblages in lowland temporary streams of the Willamette Valley, Oregon, USA

Creator:: Gerth, William J., Li, Judith, and Giannico, Guillermo R.
Abstract:: Streams that dry during part of the year are common throughout the world, yet studies of the macroinvertebrate assemblages in these types of streams are rare compared to those in permanent streams; and studies that assess the effects of agriculture on temporary stream invertebrates are even rarer. We studied macroinvertebrate...
Resource Type:: Article

Experimental brood enlargement differentially influences the magnitude of the corticosterone stress response in closely related, co-occurring songbirds

Creator:: Hardt, Braelei M., Ardia, Daniel R., Bashaw, Meredith J., and Rivers, James W.
Abstract:: 1. Rearing environments can shape offspring phenotype across taxa, yet little is known about how brood size influences hypothalamic-pituitary axis functioning, whether its expression trades off with growth, and the degree to which these -relationships vary between species. 2. We evaluated how brood size influenced nestling physiological (glucocorticoids) and somatic...
Resource Type:: Article
Full Text:: songbirds Braelei M. Hardt1 | Daniel R. Ardia2 | Meredith J. Bashaw3 | James W. Rivers4 1Department of

Comparing streambed light availability and canopy cover in streams with old-growth versus early-mature riparian forests in western Oregon

Creator:: Warren, Dana R., Keeton, William S., Bechtold, Heather A., and Rosi-Marshall, Emma J.
Abstract:: Light availability strongly influences stream primary production, water temperatures and resource availability at the base of stream food webs. In headwater streams, light is regulated primarily by the riparian forest, but few studies have evaluated the influence of riparian forest stand age and associated structural differences on light availability. In...
Resource Type:: Article
Full Text:: in western Oregon 2 3 Dana R. Warren1*, William S. Keeton2, Heather A. Bechtold3, Emma J. Rosi

The idiosyncrasies of place: geographic variation in the climate–distribution relationships of the American pika

Creator:: Jeffress, Mackenzie R., Rodhouse, Thomas J., Ray, Chris, Wolff, Susan, and Epps, Clinton W.
Abstract:: Although climate acts as a fundamental constraint on the distribution of organisms, understanding how this relationship between climate and distribution varies over a species’ range is critical for addressing the potential impacts of accelerated climate change on biodiversity. Bioclimatic niche models provide compelling evidence that many species will experience range...
Resource Type:: Article
Full Text:: in the climate–distribution relationships of the American pika MACKENZIE R. JEFFRESS,1,6 THOMAS J

A Stable Isotope Tracer Study of the Influences of Adjacent Land Use and Riparian Condition on Fates of Nitrate in Streams

Creator:: Sobota, Daniel J., Johnson, Sherri L., Gregory, Stan V., and Ashkenas, Linda R.
Abstract:: The influence of land use on potential fates of nitrate (NO3-) in stream ecosystems, ranging from denitrification to storage in organic matter, has not been documented extensively. Here, we describe the Pacific Northwest component of Lotic Intersite Nitrogen eXperiment, phase II (LINX II) to examine how land-use setting influences fates...
Resource Type:: Article
Full Text:: Adjacent Land Use and Riparian Condition on Fates of Nitrate in Streams Daniel J. Sobota,1* Sherri L

Female elk contacts are neither frequency nor density dependent

Creator:: Cross, P. C., Creech, Tyler G., Ebinger, M. R., Manlove, K., Irvine, K., Henningsen, J., Roberson, J., Scurlock, B. M., and Creel, S.
Abstract:: Identifying drivers of contact rates among individuals is critical to understanding disease dynamics and implementing targeted control measures. We studied the interaction patterns of 149 female elk (Cervus canadensis) distributed across five different regions of western Wyoming over three years, defining a contact as an approach within one body length...
Resource Type:: Article
Full Text:: dependent P. C. CROSS,1,8 T. G. CREECH,2,3 M. R. EBINGER,2,4 K. MANLOVE,5 K. IRVINE,1 J. HENNINGSEN,6 J

The Effects of Forest Fuel-Reduction Treatments in the United States

Creator:: Stephens, Scott L., McIver, James D., Boerner, Ralph E. J., Fettig, Christopher J., Fontaine, Joseph B., Hartsough, Bruce R., Kennedy, Patricia L., and Schwilk, Dylan W.
Abstract:: The current conditions of many seasonally dry forests in the western and southern United States, especially those that once experienced low- to moderate-intensity fire regimes, leave them uncharacteristically susceptible to high-severity wildfire. Both prescribed fire and its mechanical surrogates are generally successful in meeting short-term fuel-reduction objectives such that treated...
Resource Type:: Article
Full Text:: , RALPH E. J. BOERNER, CHRISTOPHER J. FETTIG, JOSEPH B. FONTAINE, BRUCE R. HARTSOUGH, PATRICIA L. KENNEDY

Re-Occupancy of Breeding Territories by Ferruginous Hawks in Wyoming: Relationships to Environmental and Anthropogenic Factors

Creator:: Wallace, Zachary P., Kennedy, Patricia L., Squires, John R., Oakleaf, Robert J., Olson, Lucretia E., and Dugger, Katie M.
Abstract:: Grassland and shrubland birds are declining globally due in part to anthropogenic habitat modification. Because population performance of these species is also influenced by non-anthropogenic factors, it is important to incorporate all relevant ecological drivers into demographic models. We used design-based sampling and occupancy models to test relationships of environmental...
Resource Type:: Article

ScholarsArchive@OSU

Evidence for the nonessentiality of ascorbic acid in the diet of the rainbow trout, Salmo gairdneri

Estimation of transmission dynamics of the Ceratomyxa shasta actinospore to the salmonid host

Agricultural land use and macroinvertebrate assemblages in lowland temporary streams of the Willamette Valley, Oregon, USA

Experimental brood enlargement differentially influences the magnitude of the corticosterone stress response in closely related, co-occurring songbirds

Comparing streambed light availability and canopy cover in streams with old-growth versus early-mature riparian forests in western Oregon

The idiosyncrasies of place: geographic variation in the climate–distribution relationships of the American pika

A Stable Isotope Tracer Study of the Influences of Adjacent Land Use and Riparian Condition on Fates of Nitrate in Streams

Female elk contacts are neither frequency nor density dependent

The Effects of Forest Fuel-Reduction Treatments in the United States

Re-Occupancy of Breeding Territories by Ferruginous Hawks in Wyoming: Relationships to Environmental and Anthropogenic Factors

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