Index Catalog // ScholarsArchive@OSU

Analysis of salmonid leukocytes purified by hypotonic lysis of erythrocytes

Creator:: Crippen, Tawni L., Bootland, Linda M., Leong, Jo-Ann C., Fitzpatrick, Martin S., Schreck, Carl B., and Vella, Anthony T.
Abstract:: 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, 1:4, and 1:6) and the time of exposure to hypotonic conditions (10, 20, and 40 s)...
Resource Type:: Article
Full Text:: . Bramley, T. A., R. Coleman, and J. Finean. 1971. Chem- ical, enzymatical, and permeability properties of

Survival and behavior of juvenile steelhead trout (Oncorhynchus mykiss) in two estuaries in Oregon, USA

Creator:: Romer, Jeremy D., Leblanc, Camille A., Clements, Shaun, Ferguson, Jayde A., Kent, Michael L., Noakes, David, and Schreck, Carl B.
Abstract:: Anadromous salmonids are viewed as a prized commodity and cultural symbol throughout the Pacific coast of North America. Unfortunately, several native salmonid populations are threatened or at risk of extinction. Despite this, little is known about the behavior and survival of these fish as the juveniles transition from freshwater to...
Resource Type:: Article
Full Text:: model. We used a pooled variance, two sample t-test to compare differences in the initial fork length

Effects of routine handling and tagging procedures on physiological stress responses in juvenile chinook salmon

Creator:: Sharpe, Cameron S., Thompson, Daniel A., Blankenship, H. Lee, and Schreck, Carl B.
Abstract:: 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, ventral fin clipping, adipose fin clipping, and a procedure simulating a pond split. Treatment fish were also subjected to a standardized...
Resource Type:: Article
Full Text:: increased relative to control levels to a maximum at t 5 1 h, but the peak cortisol response did not differ

A comparison of the behavior and survival of juvenile coho salmon (Oncorhynchus kisutch) and steelhead trout (O. mykiss) in a small estuary system

Creator:: Clements, Shaun, Stahl, Thomas, and Schreck, Carl B.
Abstract:: We used radio and acoustic telemetry to study the behavior and survival of wild steelhead trout (Oncorhynchus mykiss) and hatchery coho salmon (Oncorhynchus kisutch) and steelhead outmigrants in a small coastal estuary during two years. Survival was generally low for hatchery fish but more variable, both within and between years,...
Resource Type:: Article
Full Text:: front matter © 2011 Elsevier B.V. All doi:10.1016/j.aquaculture.2011.11.029 a b s t r a c t a r t i c l

Effects of juvenile steelhead on juvenile chinook salmon behavior and physiology

Creator:: Kelsey, D. A., Schreck, Carl B., Congleton, J. L., and Davis, L. E.
Abstract:: 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 steelhead together and groups of chinook salmon alone to determine whether the steelhead were aggressive...
Resource Type:: Article
Full Text:: Steelhead on Juvenile Chinook Salmon Behavior and Physiology D. A. KELSEY*1 Oregon Cooperative Fish and

Factors influencing density, distribution, and mesohabitat selection of juvenile wild salmonids and residual hatchery winter steelhead

Creator:: Brignon, William R., Olson, Douglas E., Schaller, Howard A., and Schreck, Carl B.
Abstract:: To best manage Eagle Creek National Fish Hatchery, negative interactions between hatchery salmonids and Endangered Species Act listed wild salmonids in the Eagle Creek Basin need to be minimized. Our objectives were: 1) to compare summer rearing densities in two similar streams, where one stream received a release of hatchery...
Resource Type:: Article
Full Text:: /$ – see front matter. Published by Elsevier doi:10.1016/j.aquaculture.2011.04.040 a b s t r a c t a r t i

Columbia River salmonid outmigration : McNary Dam passage and enhanced smolt quality : completion report, April 1, 1985

Creator:: Schreck, Carl B. and Li, Hiram W.
Abstract:: We evaluated the effects of the McNary Dam transportation system on emigrating fall and spring chinook smolts using physiological indices of stress (e.g., plasma cortisol, hepatic glycogen, leucocrit, interrenal cell nuclear diameter) and performance tests (e.g., saltwater challenge, secondary stress challenge, disease resistance). We also conducted controlled experiments in a...
Resource Type:: Technical Report
Full Text:: transferred by di pnet into a bucket containing 200 mg•L- 1 tricaine methanesulfonate (MS- 222). I t has

Incidence of male intersex in adult Pacific lamprey (Entosphenus tridentatus), with a brief discussion of intersex vs. hermaphroditism in lampreys (Petromyzontiformes)

Creator:: Clemens, Benjamin J., Sower, Stacia A., van de Wetering, Stan, and Schreck, Carl B.
Abstract:: We report the incidence of male intersex in adult Pacific lamprey (Entosphenus tridentatus (Richardson, 1836)) during their pre-spawning migration in fresh water. Although “hermaphrodites” have been suggested in other adult lampreys, this is the first detailed description and discussion of this phenomenon. A total of 0.5% of our adult Pacific...
Resource Type:: Article
Full Text:: (Entosphenus tridentatus), with a brief discussion of intersex vs. hermaphroditism in lampreys

Pre-spawning migration of adult Pacific lamprey, Entosphenus tridentatus, in the Willamette River, Oregon, U.S.A.

Creator:: Clemens, Benjamin J., Mesa, Matthew G., Magie, Robert J., Young, Douglas A., and Schreck, Carl B.
Abstract:: We describe the migration distances and timing of the adult Pacific lamprey, Entosphenus tridentatus, in the Willamette River Basin (Oregon, U.S.A.). We conducted aerial surveys to track radio-tagged fish upstream of a major waterfall and hydropower complex en route to spawning areas. We detected 24 out of the 43 fish...
Resource Type:: Article
Full Text:: er t em p er at u re (o C ) 5 10 15 20 25 Newberg Albany HarrisburgA B Fig. 3 a Mean

Potential classification of sex and stage of gonadal maturity of wild white sturgeon using blood plasma indicators

Creator:: Webb, Molly A. H., Feist, Grant W., Foster, Eugene P., Schreck, Carl B., and Fitzpatrick, Martin S.
Abstract:: Twenty-two steelhead trout (Salmo gairdneri) containing coded wire tags (CWT's) were captured in gillnets fished by the Oshoro-Maru in the Gulf of Alaska and along 180 during 1982-85. These fish originated from North American streams and hatcheries in British Columbia, Idaho, and Washington. One fish was age 0.1, 16 were...
Resource Type:: Article
Full Text:: T and 0.5 ng/mL E2 has a value of 20.7039 using the classification function equation for fe- males

ScholarsArchive@OSU

Analysis of salmonid leukocytes purified by hypotonic lysis of erythrocytes

Survival and behavior of juvenile steelhead trout (Oncorhynchus mykiss) in two estuaries in Oregon, USA

Effects of routine handling and tagging procedures on physiological stress responses in juvenile chinook salmon

A comparison of the behavior and survival of juvenile coho salmon (Oncorhynchus kisutch) and steelhead trout (O. mykiss) in a small estuary system

Effects of juvenile steelhead on juvenile chinook salmon behavior and physiology

Factors influencing density, distribution, and mesohabitat selection of juvenile wild salmonids and residual hatchery winter steelhead

Columbia River salmonid outmigration : McNary Dam passage and enhanced smolt quality : completion report, April 1, 1985

Incidence of male intersex in adult Pacific lamprey (Entosphenus tridentatus), with a brief discussion of intersex vs. hermaphroditism in lampreys (Petromyzontiformes)

Pre-spawning migration of adult Pacific lamprey, Entosphenus tridentatus, in the Willamette River, Oregon, U.S.A.

Potential classification of sex and stage of gonadal maturity of wild white sturgeon using blood plasma indicators

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