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Browsing Department of Fisheries and Wildlife by Title

Now showing items 578-597 of 850

Occupancy rates and habitat relationships of northern goshawks in historic nesting areas in Oregon

Desimone, Steven M. (1997-06-20)

The ability of northern goshawks (Accipiter gentilis) to persist in intensively managed and selectively harvested forest habitats is largely unknown. To address the concern that populations of northern goshawks in east ...
Occurrence and relative abundance of small mammals associated with riparian and upland habitats along the Columbia River

Hinschberger, Mark Steven (1978-05-04)

A small mammal inventory of occurrence and relative abundance was conducted in riparian and upland habitats in six segments along the lower Columbia River from the river mouth to McNary Dam (river mile 292) during 1974 a ...
On reconciling lake classification with the evolution of four oligotrophic lakes in Oregon

Larson, Douglas W. (Douglas William), 1949- (1970-04-27)
On the specification and interpretation of economic demand models for outdoor recreation

Copeland, Basil Lavell (1975-06-03)

The most common method of estimating the economic demand for and value of recreational resources is the Hotelling-Clawson approach. This methodology developed as an empirical technique and was never adequately founded up ...
Ontogeny and metamorphosis in the Dover sole (Microstomus pacificus) : a description of the early life history stages, with comments on the sister-group relationship between Microstomus and Embassichthys

Harris, Phillip M. (1992-05-29)

The early life history stages and metamorphosis in Dover sole (Microstomus pacificus) are described from 201 larvae and juveniles. Unlike other pleuronectids, with the possible exception of the deep-sea sole (Embassic ...
Organization and the adaptation of aquatic laboratory ecosystems to resource availability, exploitation, and a toxicant

Woltering, Daniel Mark (1980-10-03)

Organization and the adaptation of aquatic laboratory ecosystems to resource availability, exploitation, and a toxicant were examined in a 34-month study. Sixteen 560-liter microcosms including prey, predator, and com ...
Orientation and homing of the brush rabbit

Chapman, Joseph A. (1970-05-04)

A study of orientation and homing in brush rabbits, Sylvilagus bachmani ubericolor (Miller), was conducted on the E. E. Wilson Game Management Area 7 miles north of Corvallis, Oregon, between July 1967 and April 1969. ...
Origin and distribution of the fish fauna of the Harney Basin, Oregon

Bisson, Peter Andre (1969-03-21)

A theory of the origin and distribution of fishes in the Harney Basin is presented. Blitzen River, the hydrographically and ecologically isolated creeks, and the upland tributaries of Silvies River all contain population ...
Over-winter demography of the gray-tailed vole (Microtus canicaudus) in fragmented and continuous habitats

Brunkal, Heidi L. (1996-11-25)

Large scale disruption of natural habitats worldwide has led to concern over the effects of habitat fragmentation on wildlife populations. Small scale experiments may be a useful tool for discovering effects of fragmen ...
Paenibacillus thiaminolyticus is not the cause of thiamine deficiency impeding lake trout (Salvelinus namaycush) recruitment in the Great Lakes

Richter, Catherine A.; Evans, Allison N.; Wright-Osment, Maureen K.; Zajicek, James L.; Heppell, Scott A.; Riley, Stephen C.; Krueger, Charles C.; Tillitt, Donald E. (NRC Research Press, 2012-06)

Thiamine (vitamin B₁) deficiency is a global concern affecting wildlife, livestock, and humans. In Great Lakes salmonines, thiamine deficiency causes embryo mortality and is an impediment to restoration of native lake tr ...
Parasite communities indicate effects of cross-shelf distributions, but not mesoscale oceanographic features on northern California Current mid-trophic food web

Jacobson, Kym C.; Baldwin, Rebecca E. B.; Reese, Douglas C. (Inter-Research, 2012)

Mesoscale physical oceanographic features, such as jets and eddies, can influence the structure of marine ecosystems. We used trophically transmitted parasite communities of pelagic fishes in the northern California Curr ...
Parental care of peregrine falcons in interior Alaska and the effects of low-altitude jet overflights

Palmer, Angela G. (1998-12-14)

To assess the impact of low-altitude jet overflights on parental care, we examined nest attendance, time-activity budgets, and provisioning rates of 21 Peregrine Falcon (Falco peregrinus) pairs breeding along the Tanan ...
The parr-smolt metamorphosis in steelhead trout as affected by photoperiod and temperature

Wagner, Harry Henry (1970-11-02)

See pdf
Passage of juvenile cutthroat trout and steelhead through retrofitted culverts

McEnroe, Jeffrey R. (2005-02-09)
Passage, migration behavior, and autoecology of adult Pacific lamprey at Winchester Dam and within the North Umpqua River Basin, Oregon, USA

Lampman, Ralph Tatsuo (2011-11-22)

The extensive reduction in adult Pacific lamprey (Entosphenus tridentatus) counts at many hydroelectric dams in the northwestern USA signals a substantial decline in lamprey numbers across the entire region in the past 4 ...
Patterns in Catch Per Unit Effort of Native Prey Fish and Alien Piscivorous Fish in 7 Pacific Northwest USA Rivers

Hughes, Robert M.; Herlihy, Alan T. (American Fisheries Society, 2012-05)

OBJECTIVE. Hospital readmissions are a current target of initiatives to reduce healthcare costs. This study quantified the association between having a clinical culture positive for 1 of 3 prevalent hospital-associated o ...
Patterns of color phase indicate spawn timing at a Nassau grouper Epinephelus striatus spawning aggregation

Archer, Stephanie K.; Heppell, Scott A.; Semmens, Brice X.; Pattengill-Semmens, Christy V.; Bush, Phillippe G.; Mccoy, Croy M.; Johnson, Bradley C. (Current Zoology, Institute of Zoology, Chinese Academy of Sciences, 2012)

Nassau grouper Epinephelus striatus are a large bodied, top level predator that is ecologically important throughout the Caribbean. Although typically solitary, Nassau grouper form large annual spawning aggregations at ...
Patterns of interactive segregation in three species of sculpins (Cottus) in western Oregon

Finger, Terry Richard (1979-05-22)

Species interactions and their effect on the use of habitat by benthic fishes were examined in a guild composed of Cottus perplexus, C. rhotheus, and C. beldingi in the Marys River above Philomath, Oregon, and in a const ...
Patterns of temporal and spatial habitat use by sympatric speckled dace (Rhinichthys osculus) and longnose dace (R. cataractae) in an Oregon Cascades stream

Dodge, Karen L. (1993-06-09)

Microhabitat use by adult speckled dace (Rhinichthys osculus), adult longnose dace (R. cataractae), and juvenile dace (R. spp.) was investigated during the summer of 1992 in an Oregon Cascades stream. Selected areas w ...
Phenotypic comparison of hatchery and wild coho salmon (Oncorhynchus kisutch) in Oregon, Washington, and California

Hjort, Randy Carl (1979-08-15)

Phenotypic similarities of coho salmon (Oncorhynchus kisutch) stocks from Oregon, Washington, and California were compared using agglomerative and divisive cluster analyses. The phenotypic characters evaluated include ...