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Filtering by: Committee Member Anderson, N. H. Remove constraint Committee Member: Anderson, N. H.

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Life table analysis of Douglas-fir beetle (Dendroctonus pseudotsugae Hopk.) populations

Creator:

Howse, Gordon M.

Resource Type:

Dissertation
Population dynamics of the Douglas-fir cone moth, Barbara colfaciana (Kft.) (Lepidoptera:Olethreutidae)

Creator:

Nebeker, T. Evan

Abstract:

A population of the Douglas-fir cone moth, Barbara colfaxiana (Kft. ), was studied on the Buckhead Seed Production Area, Oakridge, Oregon, during 1971 and 1972. A method of estimating cone and insect populations is presented. Factors contributing to the mortality of B. colfaxiana are discussed, with resinosis being the critical...

Resource Type:

Dissertation
Sampling and estimating populations of insect seed-predators in coniferous forests

Creator:

Russell, Malcolm Howard

Resource Type:

Masters Thesis
Effects of temperature and other abiotic and biotic factors on development and survival of the immature stages of the alfalfa leafcutting bee, Megachile pacifica (Panzer) (=rotundata (F.)) (Hymenoptera:Megachilidae)

Creator:

Undurraga O., Jaime M.

Abstract:

Larval mortality of leafcutting bee, Megachile pacifica (Panzer) (= rotundata (F.)), is high, usually exceeding 50%. Parasites and predators are not a limiting factor in the survival of the progeny. The disease chalk brood has been an important mortality factor since 1974. Inadequate food supply, pollen and nectar, may affect...

Resource Type:

Dissertation
A biological and systematic study of the armored boreid, Caurinus dectes, with comparative notes on related mecoptera

Creator:

Russell, Loren Kenneth

Abstract:

Caurinus dectes Russell is a minute, brachypterous scorpionfly which was discovered at Marys Peak, Benton County, Oregon, in 1976, and subsequently described as the only representative of the subfamily Caurininae within the Boreidae (snow scorpionflies). Caurinus dectes is now known to range from the Olympic Peninsula and Northern Cascades in...

Resource Type:

Dissertation
Twospotted spider mite, Tetranychus urticae Kock, in Oregon peppermint, Mentha piperita L. : sampling, population dynamics and economic injury

Creator:

Hollingsworth, Craig Stephen

Abstract:

A pest management program for Tetranychus urticae Koch in Oregon peppermint was developed based on studies of sampling, plant phenology, population dynamics and damage thresholds. A sample size of 45 leaves provided a confidence level of 90% and a confidence interval of 50%. Estimation of the sample mean was based...

Resource Type:

Dissertation
Diet and nutrition of breeding canvasback and redhead ducks at Ruby Lake National Wildlife Refuge, Nevada

Creator:

Noyes, James Harry

Abstract:

Diet, nutrition, and foraging strategies of canvasbacks (Aythya valisineria) and redheads (A. americana) were studied by collecting actively feeding birds throughout the reproductive season in 1980 and 1981; samples of available foods were taken each time a bird was collected. Nutrient composition of the aggregate diet was determined for each...

Resource Type:

Masters Thesis
Comparative studies of the population ecology and life history patterns of an alkaline salt lake insect : Ephydra (Hydropyrus) hians Say (Diptera:Ephydridae)

Creator:

Herbst, David B.

Abstract:

Seasonal abundance and life history traits were compared between populations of the brine fly Ephydra (Hydrokyrus) hians Say (Diptera:Ephydridae), from two western Great Basin alkaline salt lakes. Abert Lake, Oregon, has a relatively low salinity (20-30 g/1 total dissolved solids) and more co-inhabitant benthic species than the higher salinity Mono...

Resource Type:

Dissertation
Photochemical transformations of phenolic compounds added to marine surface microlayers

Creator:

Lin, Kaijun

Resource Type:

Dissertation
Systematics and ecology of chubs (Gila : Cyprinidae) of the Alvord Basin, Oregon and Nevada

Creator:

Williams, Jack Edward

Abstract:

Seventeen populations of Gila Baird and Girard are identified from the Alvord Basin of southeastern Oregon and northwestern Nevada. Gila in the Alvord Basin occupy a wide range of habitats, including warm springs, cool springs, creeks, reservoirs, and a thermal lake. These populations became isolated in remnant habitats when waters...

Resource Type:

Dissertation

Limit your search

Academic Affiliation

Entomology6
College of Oceanography1
Fisheries and Wildlife1
Zoology1

Advisor

Berry, Ralph E.2
Nagel, William P.2
Bond, Carl E.1
Brookes, Victor J.1
Carlson, David J.1
more Advisors »

Commencement Year

Commencement Year range begin – Commencement Year range end

Current results range from 1973 to 1991

View distribution

Committee Member

Anderson, N. H.[remove]10
Krantz, G. W.2
McIntire, C. D.2
Overton, W. S.2
Bayne, Christopher J.1
more Committee Members »

Creator

Herbst, David B.1
Hollingsworth, Craig Stephen1
Howse, Gordon M.1
Lin, Kaijun1
Nebeker, T. Evan1
more Creators »

Date

Date range begin – Date range end

Current results range from 1972 to 1990

View distribution

Decade

1990-19991
1980-19894
1970-19795

Degree Field

Entomology7
Fisheries1
Oceanography1
Wildlife Science1

Degree Level

Doctoral8
Master's2

Degree Name

Doctor of Philosophy (Ph.D.)8
Master of Science (M.S.)2

Language

English [eng]10

Non-Academic Affiliation

Oregon State University. Graduate School10

Peer Reviewed

No9

Resource Type

Dissertation8
Masters Thesis2

Rights Statement

Copyright Not Evaluated10

Subject

Alfalfa leafcutting bee1
Boreidae1
Canvasback -- Feeding and feeds1
Conifers -- Diseases and pests1
Cyprinidae1
more Subjects »

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