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ScholarsArchive at Oregon State University
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Between 1970 and 1974, data were collected on the distribution and biology of the spotted owl (Strix occidentalis) in Oregon. One-hundred and sixteen pairs and seven single birds were located. Spotted owls occurred throughout the mountains of...
1975-10-22 (iso8601)
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A study conducted May 1978-December 1980 determined that the present geographic range of Columbian white-tailed deer, Odocoileus virginianus leucurus, (CWTD) in Douglas County, Oregon encompassed 1199km2. The area was predominately a Quercus...
1981-09-11 (iso8601)
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Twenty- six mountain goats (Oreamnos americanus), located between the Lostine River drainage and the East Fork Wallowa River drainage of the Wallowa Mountains, were monitored from June 1972 through June 1973. The age composition of the population...
1974-06-07 (iso8601)
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This research was conducted on the life history of the blue
chub, Gila (Gila) coerulea (Girard), inhabiting Paulina Lake, Oregon,
and the tui chub, Gila (Siphateles) bicolor (Girard), East
Lake, Oregon. The results are applied to the fisheries...
1975-01-29 (iso8601)
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This thesis presents the information collected on various phases of the life history of the sage grouse in the Hart Mountain area of southeastern Oregon during the period of April 8 to September 12, l954. The material was gathered in an attempt to...
1955-05-04 (iso8601)
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Growth characteristics of otoliths were used to determine age, and to separate known races and stocks of steelhead trout (Salmo
gairdneri). Otoliths were the first calcified structures observed in X-ray photographs of steelhead embryos, and a...
1971-03-12 (iso8601)
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A tagging study was conducted from June 1978 through January 1982
to provide information on the movements of adult neritic reef fishes
off the central Oregon coast. To evaluate the cause of low tag
returns of previous tagging studies of reef fish...
1982-10-18 (iso8601)
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A study was undertaken to account for and authenticate all mortality factors
affecting pronghorn antelope herds in Oregon. Work commenced in June, l954, and
terminated in July, 1956. Information pertaining to antelope mortality in other
states was...
1957-05-08 (iso8601)
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1960-05-12 (iso8601)
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Recreational angling pressure has recently increased in the neritic
reef areas off the central Oregon coast. This study describes
weight-length and age-length relationships as well as ages at sexual
maturity of the black, blue, canary, yelloweye,...
1982-03-16 (iso8601)
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A reliable, easy, and inexpensive method for determination of
molecular hydrocyanic acid (HCN) in solutions of simple and complex
metal cyanides is described. The method was used to determine
molecular HCN concentrations as low as 0.005 milligram...
1973-02-28 (iso8601)
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Blood levels of the egg yolk precursor vi-
tellogenin (VTG) can be used as a deļ¬nitive marker for
the onset and progress of maturation in female teleosts.
In the present study, an enzyme-linked immunosorbent
assay (ELISA) was developed to measure...
1999-05 (iso8601)
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Seven species of water-dependent birds (northern phalarope,
Phalaropus lobatus; American avocet, Recurvirostra americana; Wilson's
phalarope, P. tricolor; eared grebe, Podiceps nigricollis;
ring-billed gull Larus delawarensis; California gull, L....
1986-10-31 (iso8601)
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In a study of cumulative effects of riparian disturbance by grazing on the trophic
structure of high desert trout streams, watersheds with greater riparian canopy had higher standing
crops of rainbow trout Oncorhynchus mykiss, lower daily maximum...
1994-07 (iso8601)
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This study examined the potentially stressful
effects of tagging juvenile rainbow trout Oncorhynchus mykiss
with passive integrated transponder (PIT) tags by measuring
short-term (<120-h) changes in plasma concentrations of
cortisol and hepatic...
2008-05 (iso8601)
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A technique that uses hypotonic lysis of erythrocytes was optimized for the purification
of leukocytes from the peripheral blood and anterior kidney (pronephros) of rainbow trout
Oncorhynchus mykiss. Comparisons of initial blood dilution (1:2,...
2001-09 (iso8601)
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The goal of this study was to describe the duration and magnitude of the physiological stress
response in lingcod Ophiodon elongatus after exposure to brief handling and sublethal air stressors. The
response to these stressors was determined...
2006-09 (iso8601)
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The cultural and ecological values of Pacific lamprey (Lampetra tridentata) have not
been understood by Euro-Americans and thus their great decline has almost gone
unnoticed except by Native Americans, who elevated the issue and initiated research...
2002-07 (iso8601)
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Although much is known about the effects of electroshock on fish physiology, consequences
to the immune system and disease progression have not received attention. Our objectives
were to determine the effects of electroshock on selected immune...
2001-03 (iso8601)
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Experiments were designed to determine whether and how steelhead Oncorhynchus
mykiss affect chinook salmon O. tshawytscha when the two species are confined together. In a
behavioral experiment, we observed groups of juvenile chinook salmon and...
2002 (iso8601)
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Juvenile chinook salmon Oncorhynchus tshawytscha were subjected to handling and
tagging protocols typical of normal hatchery operations and monitored for their physiological response
to stress. Treatments included coded-wire-tagging, counting,...
1998-04 (iso8601)
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Because white sturgeon Acipenser transmontanus show no readily discernible external
signs of gender, management agencies use surgical biopsies to determine the sex and stage of
gonadal maturity of individuals. This procedure is highly invasive and...
2002 (iso8601)
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Aspects of bison ecology and behavior were studied in the Henry
Mountains, Utah during summer 1977 and summer 1978. Foraging
distributions of bison and of cattle were compared to elevation, slope,
horizontal distance from water, vertical distance...
1979-08-13 (iso8601)
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