Index Catalog // ScholarsArchive@OSU

Biochemical and physiological indicators of behavioral impairment in salmonids exposed to chlorpyrifos and copper

Creator:: Sandahl, Jason
Abstract:: The purpose of this work was to determine if environmentally-relevant concentrations of chlorpyrifos and copper, two commonly detected chemicals in Western surface waters, can negatively impact the biological health of salmonids. Both compounds are highly neurotoxic to fish, but each with distinct biological target sites and mechanisms of action. We...
Resource Type:: Dissertation
Full Text:: . Copper is also a contaminant of concern, although no lawsuits are pending on its use as a pesticide at

Early development of the endocrine system in salmonids : regulation of sex differentiation and ontogeny of the stress response

Creator:: Floyd, Donald J.
Abstract:: Sex steroids, follicle stimulating hormone (FSH), luteinizing hormone (LH) and gonadotropin releasing hormone (GnRH) were measured in monosex and mixed sex populations of rainbow trout during early development. Steroids declined following fertilization, increased at hatch, then fell and remained constant thereafter. Trends toward differences in steroids between males and females...
Resource Type:: Dissertation
Full Text:: William Feist for the degree of Doctor of Philosophy in Fisheries Science presented on November 30, 2000

Consequences of coumaphos and Varroa destructor on drone honey bee sperm quantity

Creator:: Delaney, Deborah Anne
Abstract:: The number of drones and genetic diversity among drones are essential components to a well mated queen. Varroa destructor preferentially parasitizes drone brood, and is thought to be responsible for the loss of feral populations that once provided additional drones for honey bee mating areas. It is necessary to use...
Resource Type:: Masters Thesis
Full Text:: subtle effects of compounds that are directly introduced into the hive. The effect of coumaphos on

How to reduce bee poisoning from pesticides [2006]

Creator:: Oregon State University. Extension Service, Washington State University. Extension, University of Idaho. Extension, Riedl, Helmut W., Johansen, Erik, Brewer, Linda J., Barbour, Jim, and Pacific Northwest Cooperative Extension
Abstract:: Commercially managed honey bees pollinate a variety of crops in the Pacific Northwest, including tree fruits, berries, cucurbits, and crops grown for seed. This activity is economically significant. In 2004, the value of bee-pollinated crops in the region was approximately $1.7 billion. Nationally, the value of bee-pollinated crops in 2000...
Resource Type:: Technical Report
Full Text:: ingredient is listed on all pesticide labels. Some of the pesticides listed may not be registered for use

Avoiding residues in small poultry and game bird flocks

Creator:: Oregon State University. Extension Service, Washington State University. Extension, University of Idaho. Extension, Hermes, J. C. (James C.), and Pacific Northwest Cooperative Extension
Abstract:: It is imperative that residues of these compounds be eliminated in poultry and eggs or be within the tolerances established by the U.S. Department of Agriculture and the U.S. Food and Drug Administration when your flock is marketed or eggs are sold. Commercial chicken and turkey flocks are tested for...
Resource Type:: Technical Report
Full Text:: piece of equip- ment it touches. Some of the drug will remain on the equipment and contaminate later

Natural and semi-synthetic compounds with biocidal activity against arthropods of public health importance

Creator:: Khasawneh, Mohammad A.
Abstract:: This study identified new compounds with pest control activities. The two sources of candidates that were followed here were the main heartwood extract of Alaska Yellow Cedar (AYC) constituents and several semi-synthetic counterparts. Five compounds were isolated and identified for the first time in AYC heartwood in this research: two...
Resource Type:: Dissertation
Full Text:: positions C-2 and C- 13 of the eremophilane ring structure has an important effect on the activity. For

The use of native macroinverebrates to assess pesticide risk to Oregon streams

Creator:: Peterson, Jennifer L.
Resource Type:: Dissertation

Multiple stressors and amphibian population declines

Creator:: Hatch, Audrey C.
Abstract:: In the past decade, declines in amphibian populations have captured scientific and popular interest. The causes of the declines are likely to be complex and involve interactions between several environmental stressors. Using multifactorial experiments, I investigated the combined effects of several anthropogenic stressors on developing amphibians in Oregon, USA. In...
Resource Type:: Dissertation
Full Text:: . Results suggest that in some cases, the effect of increasing nitrate level on larval activity depended on

Effects of esfenvalerate on native macroinvertebrates representative of Pacific Northwest streams

Creator:: Johnson, Katherine R.
Abstract:: Aquatic insects are essential components of healthy stream ecosystems, contributing to nutrient cycling, trophic dynamics and other ecological functions. Aquatic insect species, particularly those in the orders Ephemeroptera, Plecoptera and Trichoptera (EPT taxa) are however, extremely sensitive to insecticide contamination. Given that urban and agricultural use of synthetic pyrethroid insecticides...
Resource Type:: Dissertation
Full Text:: groups, (c) to determine the effect of esfenvalerate ii intoxication on larval caddisfly case

Evaluating space use and pesticide exposure risk for burrowing owls in an agricultural environment

Creator:: Gervais, Jennifer A.
Abstract:: Large burrowing owl (Aihene cunicularia) populations exist in areas of intensive agriculture in California, and pesticide exposure has been identified as a potential threat to population persistence. I evaluated breeding season use of agricultural fields by adult male owls using radio telemetry, and examined egg contaminant residues to estimate population-level...
Resource Type:: Dissertation
Full Text:: not appear to have any effect on either productivity or survival of adult females, nor Redacted for

ScholarsArchive@OSU

Biochemical and physiological indicators of behavioral impairment in salmonids exposed to chlorpyrifos and copper

Early development of the endocrine system in salmonids : regulation of sex differentiation and ontogeny of the stress response

Consequences of coumaphos and Varroa destructor on drone honey bee sperm quantity

How to reduce bee poisoning from pesticides [2006]

Avoiding residues in small poultry and game bird flocks

Natural and semi-synthetic compounds with biocidal activity against arthropods of public health importance

The use of native macroinverebrates to assess pesticide risk to Oregon streams

Multiple stressors and amphibian population declines

Effects of esfenvalerate on native macroinvertebrates representative of Pacific Northwest streams

Evaluating space use and pesticide exposure risk for burrowing owls in an agricultural environment

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