Index Catalog // ScholarsArchive@OSU

Size-structured spatial patterns as a measure of larval dispersal and emigration

Creator:: Markle, Douglas F.
Abstract:: Size-structured spatial patterns in larvae of 2 sucker and 3 minnow species are described from fixed-site sampling in Upper Klamath Lake, Oregon, and are used to demonstrate patterns of size-based losses downstream and retention in the lake. The smallest larvae of shortnose suckers (Chasmistes brevirostris), Lost River suckers (Deltistes luxatus),...
Resource Type:: Article
Full Text:: EMIGRATION Douglas F. Markle1 ABSTRACT.—Size-structured spatial patterns in larvae of 2 sucker and 3 minnow

Timing of Population Fragmentation in a Vulnerable Minnow, the Umpqua Chub, and the Role of Nonnative Predators

Creator:: O’Malley, Kathleen G., Markle, Douglas F., and Ardren, William R.
Abstract:: We examined the distribution of Umpqua Chub Oregonichthys kalawatseti, an endemic, vulnerable minnow in western Oregon, and whether six ecological populations (based on distribution patterns) had sufficient genetic cohesion to be considered evolutionary populations. We also evaluated the influence of Holocene geological events and recent nonnative predator introductions on the...
Resource Type:: Article
Full Text:: a , Douglas F. Markle b & William R. Ardren c a Coastal Oregon Marine Experiment Station, Hatfield

Submersible observations of deep-reef fishes of Heceta Bank, Oregon

Creator:: Pearcy, William G., Stein, David L., Hixon, Mark Anthony, Pikitch, Ellen K., Barss, William H., and Starr, Richard M.
Abstract:: Rockfishes, Sebastes spp.. were the most numerous and speciose fishes seen during 16 submersible dives from 64 to 305 m depth in the vicinity of Heceta Bank off the coast of Oregon. Dense schools of juvenile rockfishes and large yellowtail rockfish, S. flavidus, were observed only over rocky, high relief...
Resource Type:: Article
Full Text:: distribution, abundance, age and length composition. U.S. Dep. Commer., NOAA Tech. Memo. NMFS-F/NWC-70, 376

Enzyme-Linked Immunosorbent Assay (ELISA) of Vitellogenin in Temperate Basses (Genus Morone): Plasma and In Vitro Analyses

Creator:: Heppell, Scott A., Jackson, Leslie F., Weber, Gregory, M., and Sullivan, Craig, V.
Abstract:: Blood levels of the egg yolk precursor vi- tellogenin (VTG) can be used as a deﬁnitive 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 VTG in blood plasma from three species of temperate basses....
Resource Type:: Article
Full Text:: . HEPPELL, LESLIE F. JACKSON, GREGORY M. WEBER, AND CRAIG V. SULLIVAN* Department of Zoology, North

Estimating vertebrate, benthic macroinvertebrate, and diatom taxa richness in raftable Pacific Northwest rivers for bioassessment purposes

Creator:: Hughes, Robert M., Herlihy, Alan T., Gerth, William J., and Pan, Yangdong
Abstract:: The number of sites sampled must be considered when determining the effort necessary for adequately assessing taxa richness in an ecosystem for bioassessment purposes; however, there have been few studies concerning the number of sites necessary for bioassessment of large rivers. We evaluated the effect of sample size (i.e., number...
Resource Type:: Article
Full Text:: T. Herlihy & William J. Gerth & Yangdong Pan Received: 15 November 2010 /Accepted: 8 June 2011

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:: selection of juvenile wild salmonids and residual hatchery winter steelhead William R. Brignon a,b

When is bigger better? Early marine residence of middle and upper Columbia River spring Chinook salmon

Creator:: Tomaro, Londi M., Teel, David J., Peterson, William T., and Miller, Jessica A.
Abstract:: Early ocean residence is considered a critical period for juvenile salmon although specific survival mechanisms are often unidentified and may vary by species or life stage. Columbia River spring-run Chinook salmon Oncorhynchus tshawytscha abundance has declined dramatically since the early 1900s. To elucidate mechanisms of early marine survival, we tested...
Resource Type:: Article
Full Text:: salmon Londi M. Tomaro1*, David J. Teel2, William T. Peterson3, Jessica A. Miller1 1Coastal Oregon

Comparing streambed light availability and canopy cover in streams with old-growth versus early-mature riparian forests in western Oregon

Creator:: Warren, Dana R., Keeton, William S., Bechtold, Heather A., and Rosi-Marshall, Emma J.
Abstract:: Light availability strongly influences stream primary production, water temperatures and resource availability at the base of stream food webs. In headwater streams, light is regulated primarily by the riparian forest, but few studies have evaluated the influence of riparian forest stand age and associated structural differences on light availability. In...
Resource Type:: Article
Full Text:: in western Oregon 2 3 Dana R. Warren1*, William S. Keeton2, Heather A. Bechtold3, Emma J. Rosi

Investigating temporal patterns of a native bee community in a remnant North American bunchgrass prairie using blue vane traps

Creator:: Kimoto, Chiho, DeBano, Sandra J., Thorp, Robbin W., Rao, Sujaya, and Stephen, William P.
Abstract:: Native bees are important ecologically and economically because their role as pollinators fulfills a vital ecosystem service. Pollinators are declining due to various factors, including habitat degradation and destruction. Grasslands, an important habitat for native bees, are particularly vulnerable. One highly imperiled and understudied grassland type in the United States...
Resource Type:: Article
Full Text:: . Thorp3c, Sujaya Rao4d, and William P. Stephen4e 1Oregon State University, Hermiston Agricultural

Impact of land use patterns and agricultural practices on water quality in the Calapooia River Basin of western Oregon

Creator:: Mueller-Warrant, G. W., Griffith, S. M., Whittaker, G. W., Banowetz, G. M., Pfender, W. F., Garcia, T. S., and Giannico, G. R.
Abstract:: Agricultural practices, including tillage, fertilization, and residue management, can affect surface runoff, soil erosion, and nutrient cycling. These processes, in turn, may adversely affect (1) quality of aquatic resources as habitat for amphibians, fish, and invertebrates, (2) costs of treating surface and ground water to meet drinking water standards, and...
Resource Type:: Article
Full Text:: hydrologist, Gary M. Banowetz is research leader and a supervisory plant physiologist, and William F

ScholarsArchive@OSU

Size-structured spatial patterns as a measure of larval dispersal and emigration

Timing of Population Fragmentation in a Vulnerable Minnow, the Umpqua Chub, and the Role of Nonnative Predators

Submersible observations of deep-reef fishes of Heceta Bank, Oregon

Enzyme-Linked Immunosorbent Assay (ELISA) of Vitellogenin in Temperate Basses (Genus Morone): Plasma and In Vitro Analyses

Estimating vertebrate, benthic macroinvertebrate, and diatom taxa richness in raftable Pacific Northwest rivers for bioassessment purposes

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

When is bigger better? Early marine residence of middle and upper Columbia River spring Chinook salmon

Comparing streambed light availability and canopy cover in streams with old-growth versus early-mature riparian forests in western Oregon

Investigating temporal patterns of a native bee community in a remnant North American bunchgrass prairie using blue vane traps

Impact of land use patterns and agricultural practices on water quality in the Calapooia River Basin of western Oregon

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