Index Catalog // ScholarsArchive@OSU

Sediment characteristics and the trophic status of four Oregon lakes

Creator:: Meyerhoff, Roger Dean
Abstract:: There is evidence that recent ecological changes in lakes and their watersheds can be detected from analysis of lake sediments. This study was initiated to correlate changes in some sediment characteristics of four Oregon lakes with past cultural developments of the lakes and their watersheds. The lakes chosen for this...
Resource Type:: Masters Thesis
Full Text:: Graduate S Date thesis is presented 797 Typed by Deanna L. Cramer for Roger Dean Meyerhoff Redacted for

Exercise and acid-base balance in rainbow trout

Creator:: Meyerhoff, Roger Dean
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF ROGER DEAN MEYERHOFF for the

The reproductive biology of the mountain cottontail rabbit in Oregon

Creator:: Powers, Roger Alan
Abstract:: The reproductive characteristics of the mountain cottontail rabbit, Sylvilagus nuttalli (Bachman), were investigated from 269 specimens collected in central Oregon between 28 May 1968 and 28 August 1969. Male rabbits were in breeding condition between mid-February and 3 July 1969. Nearly 77% of the females bore four litters between 7...
Resource Type:: Masters Thesis
Full Text:: in Oregon AN ABSTRACT OF THE THESIS OF Roger Alan Powers in for the Master of Science (Name

Cryo-preservation of viable fish sperm

Creator:: Graybill, James Roger
Abstract:: Fishery researchers have attempted to preserve viable fish sperm for extended periods of time. Only limited success has been achieved with storage of spermatozoa from salmonids. The principal accomplishments of this investigation during the fiscal year 1966-1967 were the development of standard methods for the collection and evaluation of fish...
Resource Type:: Masters Thesis
Full Text:: AN ABSTRACT OF THE THESIS OF JAMES ROGER GRAYBILL (Name of

Assemblages of groundfish caught using commercial fishing strategies off the coasts of Oregon and Washington from 1985-1987

Creator:: Rogers, Jean Beyer
Abstract:: The groundfish trawl fishery operating off the coasts of Oregon and Washington 1985-1987 caught six major assemblages of species which could be treated as units in developing mixed-species management plans. Eighty-one percent of the tows observed on commercial vessels were consistently placed in one of the assemblage designations using three...
Resource Type:: Dissertation
Full Text:: data (L), using the tows consistently placed in an assemblage by three methods. IV1. Comparison of

Development of a progeny marker for steelhead

Creator:: Shippentower, Gene E.
Abstract:: This study was undertaken to determine if strontium chloride could be used to create a trans-generational otolith mark in steelhead (Oncorhynchus mykiss). I completed two strontium injection trials and a survey of juvenile steelhead from various steelhead hatcheries. The two trials measured Sr:Ca ratios in otoliths in response to injections...
Resource Type:: Masters Thesis
Full Text:: . Douglas Markle and Dr. Roger Nielsen for providing assistance during my graduate work. I would like

Relationships between fish species distribution and habitat in the Willamette River drainage in western Oregon

Creator:: Kruse, Amy Ellen
Abstract:: The objectives of this study were to (1) describe physical environmental conditions and species composition at several sites along an Upstream/downstream gradient in a number of tributaries of the Willamette River in western Oregon; and (2) identify possible relationships between species distributional patterns and physical habitat parameters using detrended correspondence...
Resource Type:: Masters Thesis
Full Text:: graduate committee, Dr. Jim Hall and Dr. Roger Petersen for the opportunity to do this study and their

Changes in size and age at maturity of Columbia River upriver bright fall chinook salmon (Oncorhynchus tshawytscha) : implications for stock fitness, commercial value, and management

Creator:: Beaty, Roy E.
Abstract:: The average size and age of chinook salmon (Oncorhynchus tshawytscha) caught in commercial fisheries along the Pacific Coast of North America have decreased substantially in this century. These declines might be caused in part by changes in size and age at maturity within the stocks contributing to those fisheries. Upriver...
Resource Type:: Masters Thesis
Full Text:: graduate committee members -- Dr. Roger Petersen (emeritus), Dr. Cliff Pereira, and particularly Dr. Phil

Determination of marine migratory behavior and its relationship to selected physical traits for least cisco (Coregonus sardinella) of the western Arctic coastal plain, Alaska

Creator:: Seigle, John C.
Abstract:: With increased resource development on the western Arctic coastal plain of Alaska (especially within the oil extraction industry) it is important to understand the basic life history attributes of whitefish stocks in the region in order to ensure appropriate management. These fish are a crucial part of subsistence harvests for...
Resource Type:: Masters Thesis
Full Text:: science. I am indebted to Roger Nielsen for his guidance in the use of electron microprobe technology

Internal helminth parasites of the lesser prairie-chicken Tympanuchus pallidicinctus in southwestern Kansas: incidence, burden, and effects

Creator:: Robel, Robert J., Walker, Thomas L. Jr, Hagen, Christian A., Ridley, Robert K., Kemp, Kenneth E., and Applegate, Roger D.
Abstract:: We conducted a 3-year study of helminth parasites to assess their effect on the lesser prairie-chicken Tympanuchus pallidicinctus. Helminth parasites were found in most of the examined wild prairie chicken carcasses: 95% had eye worm Oxyspirura petrowi, 92% had stomach worm Tetrameres sp., and 59% had caecal worm Subulura sp....
Resource Type:: Article
Full Text:: pallidicinctus in southwestern Kansas: incidence, burdens and effects Robert J. Robel, Thomas L. Walker, Jr

ScholarsArchive@OSU

Sediment characteristics and the trophic status of four Oregon lakes

Exercise and acid-base balance in rainbow trout

The reproductive biology of the mountain cottontail rabbit in Oregon

Cryo-preservation of viable fish sperm

Assemblages of groundfish caught using commercial fishing strategies off the coasts of Oregon and Washington from 1985-1987

Development of a progeny marker for steelhead

Relationships between fish species distribution and habitat in the Willamette River drainage in western Oregon

Changes in size and age at maturity of Columbia River upriver bright fall chinook salmon (Oncorhynchus tshawytscha) : implications for stock fitness, commercial value, and management

Determination of marine migratory behavior and its relationship to selected physical traits for least cisco (Coregonus sardinella) of the western Arctic coastal plain, Alaska

Internal helminth parasites of the lesser prairie-chicken Tympanuchus pallidicinctus in southwestern Kansas: incidence, burden, and effects

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