Index Catalog // ScholarsArchive@OSU

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:: Anderson was an indispensable source of information on aquatic insect biology and laboratory rearing. I’d

The effects of water withdrawals on the emergence timing, adult body mass, and total emerging biomass of aquatic insects from two northeast Oregon rivers

Creator:: Brown, Phil D.
Abstract:: Small low-head diversion dams are capable of removing much of the flow of a river, often resulting in increased water temperatures and habitat loss. Warmer temperatures have been shown to accelerate aquatic invertebrate growth and development, and discharge reductions can reduce instream habitat, suggesting that water withdrawals may alter both...
Resource Type:: Masters Thesis
Full Text:: profound effect on the life histories of aquatic invertebrates. Temperature plays a direct role in the

Respiratory strategies and associated exchange epithelia as determinants on contaminant uptake in aquatic insects

Creator:: Buchwalter, David B.
Abstract:: Aquatic insects are used extensively to evaluate water quality. Despite their widespread use as indicator organisms, relatively little is known about the organismal characteristics that determine sensitivity differences to individual and multiple stressors. Insects have evolved several respiratory strategies that range from breathing atmospheric air to utilizing dissolved oxygen in...
Resource Type:: Dissertation
Full Text:: our limited understanding of the organismal characteristics that mediate aquatic insect responses to

How to reduce bee poisoning from pesticides [2013]

Creator:: Johansen, Erik, Hooven, Louisa Ada, Sagili, Ramesh Reddy, and Oregon State University. Extension Service
Abstract:: An overview of how a variety of wild and managed bees and their pollination activities are affected by pesticide application. Provides guidelines for how beekeepers, growers and pesticide applicators can work together to prevent bee poisoning.
Resource Type:: Technical Report
Full Text:: the side of caution, and avoid spraying any pesticide near bee colonies and on flowering plants

Ultraviolet radiation as an environmental stressor of amphibians

Creator:: Bancroft, Betsy A.
Abstract:: My thesis explored the effects of and potential mediating mechanisms for an important environmental stressor, ultraviolet-B (UVB) radiation. UVB radiation has negative effects on organisms in both terrestrial and aquatic systems. I used meta-analysis to quantify the effects of UVB radiation on a diversity of aquatic organisms (Chapter 2). UVB...
Resource Type:: Dissertation
Full Text:: negative effect of UVB on aquatic organisms, the suggestion that UVB negatively affects amphibians has

Effect of Various Pesticides on Lettuce Physiology and Yield

Creator:: Toscano, N. C.
Resource Type:: Conference Proceeding
Full Text:: Residue, PPm <0.1 <0.1 <0.1 <0.1 <0.1 <0.1 EFFECT OF VARIOUS PESTICIDES ON LETTUCE PHYSIOLOGY AND

Effects of dieldrin on the growth and development of steelhead trout

Creator:: Oregon State University. Agricultural Experiment Station, Shumway, Dean L., and Chadwick, George Grete
Abstract:: Experiments were conducted to determine survival, growth, and accumulation of HEOD (major component of dieldrin) in the tissues of steelhead trout (Salmo gairdneri) embryos, alevins, and fry exposed to dieldrin concentrations ranging from 0.012 to 52 ppb. The fish were held in specially designed exposure chambers provided with continuously renewed...
Resource Type:: Technical Report
Full Text:: fry, held at various concentrations; and (3) I effect of dieldrin concentrations in water on the

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

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:: were developed in the absence of information about some of these subtle but real impacts on aquatic

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

ScholarsArchive@OSU

Effects of esfenvalerate on native macroinvertebrates representative of Pacific Northwest streams

The effects of water withdrawals on the emergence timing, adult body mass, and total emerging biomass of aquatic insects from two northeast Oregon rivers

Respiratory strategies and associated exchange epithelia as determinants on contaminant uptake in aquatic insects

How to reduce bee poisoning from pesticides [2013]

Ultraviolet radiation as an environmental stressor of amphibians

Effect of Various Pesticides on Lettuce Physiology and Yield

Effects of dieldrin on the growth and development of steelhead trout

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

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

How to reduce bee poisoning from pesticides [2006]

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