Index Catalog // ScholarsArchive@OSU

Variation in the maturity schedule of English sole and its influence on calculating the F₃₅ ̳% target fishing rate

Creator:: Al-Jufaily, Saud M.
Resource Type:: Masters Thesis
Full Text:: approved: David B. Sampson This study analyzed the geographic variation in the maturity schedule for the

Using Oregon trawl logbooks to study spatial and temporal characteristics of commercial groundfish species associations

Creator:: Lee, Yong Woo
Abstract:: Species associations of fifteen major commercial groundfish species in the northeastern Pacific ocean and their spatial and temporal characteristics were studied using Oregon bottom trawl logbook data, 1987 to 1993. Screening procedures were used to remove questionable data from the original logbook files, which resulted in the exclusion of information...
Resource Type:: Masters Thesis
Full Text:: ASSOCIATIONS. Abstract approved: David B. Sampson Species associations of fifteen major commercial

The influence of biological characteristics on fisheries co-management : a game theory perspective

Creator:: Trisak, Jiraporn
Abstract:: Co-management is considered an alternative approach to fisheries management, however, not all co-managed fisheries have been successful. Most studies discussing the success and failure of co-management have emphasized economic and social attributes of success and failure, such as fishery rights and institutional arrangements. The effect on co-management of biological characteristics,...
Resource Type:: Dissertation
Full Text:: B. Sampson Co-management is considered an alternative approach to fisheries management, however

The effects of harvesting Pacific hake (Merluccius productus) on the offshore community : the results of a multi-species model

Creator:: Gartz, Russell G.
Abstract:: The effects of harvesting Pacific hake (Merluccius productus) were examined with a multi-species numerical model composed of seven logistic growth equations coupled by a food web. The food web was composed of: California sea lions (Zalophus californianus), hake, sablefish (Anaplopoma fimbria), spiny dogfish (Squalus acanthias), a generic rockfish species (Sebastes...
Resource Type:: Masters Thesis
Full Text:: . stract approved: David B. Sampson The effects of harvesting Pacific hake (Merluccius product us) were

The effect of preplant nitrogen fertilization and soil temperature on biological nitrogen fixation and yield of alfalfa (Medicago sativa L.)

Creator:: Shuler, Philip E.
Abstract:: The usefulness of preplant nitrogen (N) in establishing alfalfa in colder production areas has not been well characterized. This study was conducted to determine the effect of preplant N and soil temperature on yield, percent N derived from biological nitrogen fixation (PBNF), and shoot N concentration in alfalfa (Medicago sativa...
Resource Type:: Dissertation
Full Text:: : David 5. Hannaway The usefulness of preplant nitrogen (N) in estab- lishing alfalfa in colder

Statistical model selection criteria and their application to the Stock Synthesis assessment program

Creator:: Helu, Siosaia Langitoto
Abstract:: Statistical modeling has evolved around building increasingly more complex models, even though it is common knowledge among statisticians that an optimal model size usually exists for any given data set. Having overly complex models leads to imprecise parameter estimates and tends to increase the subjective role of the modeler, which...
Resource Type:: Masters Thesis
Full Text:: Approved: David B. Sampson Abstract Statistical modeling has evolved around building increasingly

Spatial and temporal characteristics of bottom-trawl fish assemblages of the continental shelf and upper slope of the Pacific Coast of the United States, 1977-1992

Creator:: Jay, Chadwick V.
Abstract:: Twenty-three bottom-trawl fish assemblages were identified from the relative biomass of 33 dominant species that occurred in the National Marine Fisheries Services' triennial trawl surveys over the continental shelf and upper slope off California, Oregon, and Washington from 1977 to 1992. The assemblages accounted for about 70% of the total...
Resource Type:: Dissertation
Full Text:: . Abstract approved: David Sampson Twenty-three bottom-trawl fish assemblages were identified from the

Redd site selection and spawning habitat use by fall chinook salmon

Creator:: Geist, David R.
Abstract:: The spawning habitat associated with fall chinook salmon (Oncorhynchus tshawytscha) redd clusters was investigated in the Hanford Reach of the Columbia River. A conceptual spawning habitat model is proposed that describes how geomorphic features of river channels create hydraulic processes, including hyporheic flows, that influence where salmon spawn in unconstrained...
Resource Type:: Dissertation
Full Text:: Chinook Salmon. Abstract approved: David Sampson The spawning habitat associated with fall chinook

Propagation and forcing of high frequency sea level variability in the eastern equatorial Pacific

Creator:: Cornejo-Rodriguez, M. Pilar
Abstract:: Sea level and wind data from coastal and island stations from Buenaventura, Colombia (4°N) to Callao, Peru (12°S) have been analyzed for the 1979-1984 time period, to describe the seasonal and interannual variations in the characteristics of short time scale variability (1-2 weeks). Auto- and cross spectral analyses are used...
Resource Type:: Masters Thesis

Nitrogen nutrition of seedling alfalfa (Medicago sativa L.)

Creator:: Eardly, Bertrand D.
Abstract:: Nitrogen fertilization of seedling legumes is a controversial practice intended to provide N to the plant during periods when seed N, soil N, and N₂ fixation may not meet plant requirements; eg. prenodulation, postharvest, or in the event of an inoculation failure. Field experiments were conducted in 3 consecutive years...
Resource Type:: Dissertation
Full Text:: .) Abstract approved: Redacted for privacy Dr. David B. Hannaway Nitrogen fertilization of seedling legumes

ScholarsArchive@OSU

Variation in the maturity schedule of English sole and its influence on calculating the F₃₅ ̳% target fishing rate

Using Oregon trawl logbooks to study spatial and temporal characteristics of commercial groundfish species associations

The influence of biological characteristics on fisheries co-management : a game theory perspective

The effects of harvesting Pacific hake (Merluccius productus) on the offshore community : the results of a multi-species model

The effect of preplant nitrogen fertilization and soil temperature on biological nitrogen fixation and yield of alfalfa (Medicago sativa L.)

Statistical model selection criteria and their application to the Stock Synthesis assessment program

Spatial and temporal characteristics of bottom-trawl fish assemblages of the continental shelf and upper slope of the Pacific Coast of the United States, 1977-1992

Redd site selection and spawning habitat use by fall chinook salmon

Propagation and forcing of high frequency sea level variability in the eastern equatorial Pacific

Nitrogen nutrition of seedling alfalfa (Medicago sativa L.)

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