Index Catalog // ScholarsArchive@OSU

The relationship between stream habitat complexity and anadromous salmonid diversity and habitat selection

Creator:: Chen, Glenn K.
Resource Type:: Dissertation
Full Text:: intrigued by the patterns of diversity in the natural world (Darwin 1865). Ecologists have examined the

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:: Steve Jacobs -- Oregon Department of Fish and Wildlife (ODFW). N. Kathryn Brigham, B. Paul Lumley, Dr

Heterogeneous thermal habitat for northeast Oregon stream fishes

Creator:: Ebersole, Joseph L.
Abstract:: Discrete coldwater patches within warm streams provide potential thermal refuge for coldwater fishes during periods of heat stress. This analysis focused on heterogeneity in stream water temperatures as influenced by local influx of cooler subsurface waters. Using field thermal probes and recording thermistors, we identified and characterized coldwater patches potentially...
Resource Type:: Dissertation
Full Text:: coldwater patches August 21 22, 1999. Coidwater patch assemblages were classified as salmonid (A and B) or

A hierarchical stream habitat classification system: development and demonstration

Creator:: Frissell, Christopher A.
Abstract:: Classification of Streams and stream habitats is useful for research involving establishment of monitoring stations, determining local impacts of land use practices, generalization from site-specific data, and assessment of basin-wide, cumulative impacts of human activities on streams and their biota. This thesis presents a framework for a hierarchical classification system,...
Resource Type:: Masters Thesis
Full Text:: 6. Variation in slope and channel width in forested (a) and logged (b) sections of Minto Creek, a

Stream habitat classification and restoration in the Blue Mountians of northeast Oregon

Creator:: Ebersole, Joseph Lamar
Abstract:: The restoration of rivers and streams should be based on a strong conceptual framework. Streams are developing systems. As such, streams exhibit temporal behaviors that change with changing stream environments. Underlying the dynamic development of streams is potential capacity. Streams express this capacity as an array of habitats over time...
Resource Type:: Masters Thesis
Full Text:: strong groundwater upwelling maintaining constant cold temperatures in pool A. Pool B temperatures are

A model for understanding the influence of selective and nonselective harvest on fish populations

Creator:: Hirai, Takayuki
Abstract:: To understand the influence of selective harvesting on the adaptive capacity of fish populations in changing environments, a computer simulation model was developed. In the model, hypothetical populations were composed of five different life histories, which were genetically determined. Each life history type had its own rate of survival and...
Resource Type:: Masters Thesis
Full Text:: in different environments. b) Stocks or local populations have the capacity to evolve in concordance

Age, growth, and diet of fish in the Waldo Lake natural-cultural system

Creator:: Swets, Nicola L.
Abstract:: Waldo Lake, located in the Oregon Cascades, is considered to be one of the most dilute lakes in the world. Even with very low nutrient concentrations and sparse populations of zooplankton, introduced fish in the lake are large in size and in good condition when compared to fish from other...
Resource Type:: Masters Thesis
Full Text:: . The Waldo Lake Basin and the Waldo Lake Wilderness boundary. (B)(A) NATURAL-CULTURAL SYSTEM

Arthropod community organization and development in pear

Creator:: Gut, Larry J.
Abstract:: Arthropod communities in pear are conceptualized as hierarchically organized systems in which several levels of organization or subsystems can be recognized between the species population level and the community as a whole. An individual tree is taken to be the community habitat with arthropod subcommunities developing on leaf, fruit and...
Resource Type:: Dissertation
Full Text:: extended to the rest of my committee, to my friend Dr. Porter B. Lombard and to my graduate representative

Influence of water temperature and beaver ponds on Lahontan cutthroat trout in a high-desert stream, southeastern Oregon

Creator:: Talabere, Andrew G.
Abstract:: The distribution of Lahontan cutthroat trout Oncorhynchus clarki henshawi was assessed in a high-desert stream in southeastern Oregon where beaver Castor canadensis are abundant. Longitudinal patterns of beaver ponds, habitat, temperature, and Lahontan cutthroat trout age group distribution were identified throughout Willow Creek. Three distinct stream segments were classified based...
Resource Type:: Masters Thesis
Full Text:: /day that the water temperature exceeded 20, 22, 24, and 26°C in beaver-pond (B;LI) and free-flowing (F

A steady-state model of ecological hierarchy

Creator:: Thompson, Grant Garrison
Abstract:: A generalized mathematical model of ecosystems is developed. The model begins with the general class of systems known as state-determined systems, in which the time-derivative of each state variable is a function of some subset of the set of all system state variables and .environmental parameters. A formal basis is...
Resource Type:: Dissertation
Full Text:: representative, I would like to thank Drs. R. Bruce Rettig, C. David McIntire, and Gregory B. Fink, respectively

ScholarsArchive@OSU

The relationship between stream habitat complexity and anadromous salmonid diversity and habitat selection

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

Heterogeneous thermal habitat for northeast Oregon stream fishes

A hierarchical stream habitat classification system: development and demonstration

Stream habitat classification and restoration in the Blue Mountians of northeast Oregon

A model for understanding the influence of selective and nonselective harvest on fish populations

Age, growth, and diet of fish in the Waldo Lake natural-cultural system

Arthropod community organization and development in pear

Influence of water temperature and beaver ponds on Lahontan cutthroat trout in a high-desert stream, southeastern Oregon

A steady-state model of ecological hierarchy

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