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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 use of native macroinverebrates to assess pesticide risk to Oregon streams

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

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

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

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

Assessing the impact of microbial pesticides on nontarget insects : laboratory versus field tests

Creator:: James, Rosalind R.
Resource Type:: Dissertation
Full Text:: significant effect of treatment on insect survival. If a significant effect was seen, a Tukey's LSD (SAS

Pyrethroid insecticide interaction with the GABAA receptor and the peripheral-type benzodiazepine receptor of rainbow trout brain

Creator:: Eshleman, Amy J.
Abstract:: The peripheral-type benzodiazepine receptor (PTBR) of trout brain was pharmacologically characterized and pyrethroid interaction with this site investigated. High-affinity binding sites for [³H]PK 11195 were detected in brain membranes of rainbow trout; these shared some of the characteristics of the PTBR of rodent brain (i.e., high affinity for PK 11195...
Resource Type:: Dissertation
Full Text:: inhibition of specific [35S]TBPS binding. 83 3-6. Lack of effect of PK 11195 on Ro5-4864-induced enhancement

Effect of kraft mill effluent on structure and function of periphyton communities

Creator:: Williams, Harvey Dean
Abstract:: Raw and biologically stabilized Kraft mill effluents were introduced into laboratory artificial streams at a ratio of 15 ml per liter of water over a two year period. Effluent from the stabilization pond of a second mill was introduced at concentrations of from 5 to 40 ml per liter of...
Resource Type:: Dissertation
Full Text:: Effect of kraft mill effluent on structure and function

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

Effects of pesticides on amphibians with special reference to the pyrethroidinsecticide, cypermethrin

Creator:: Biga, Lindsay M.
Abstract:: Pollution by pesticides is a ubiquitous concern for wildlife. The effects of pesticides are especially concerning in aquatic environments, which are particularly vulnerable as they have several exposure routes for the influx of chemicals. These effects are of particular concern as biodiversity loss reaches unprecedented rates. This includes recent declines...
Resource Type:: Dissertation
Full Text:: effects of cypermethrin on both invertebrate and vertebrate species in an aquatic community. This

ScholarsArchive@OSU

Effects of esfenvalerate on native macroinvertebrates representative of Pacific Northwest streams

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

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

Ultraviolet radiation as an environmental stressor of amphibians

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

Assessing the impact of microbial pesticides on nontarget insects : laboratory versus field tests

Pyrethroid insecticide interaction with the GABAA receptor and the peripheral-type benzodiazepine receptor of rainbow trout brain

Effect of kraft mill effluent on structure and function of periphyton communities

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

Effects of pesticides on amphibians with special reference to the pyrethroidinsecticide, cypermethrin

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