Index Catalog // ScholarsArchive@OSU

Growth, residence, and movement of juvenile Chinook salmon within restored and reference estuarine marsh channels in Salmon River, Oregon

Creator:: Hering, David K.
Abstract:: Tidal wetland channels provide rearing habitat for juvenile Chinook salmon as they emigrate from freshwater habitat and prepare to enter the ocean. Widespread diking and drainage of estuarine marshes for agricultural and urban development may have contributed to a decline in salmon abundance in the Pacific Northwest, prompting efforts to...
Resource Type:: Masters Thesis
Full Text:: ABSTRACT OF THE THESIS OF David K. Hering for the degree of Master of Science in Fisheries Science

The status and life history traits of endemic, native and introduced species in Lake Lanao, Philippines

Creator:: Ismail, Gladys B.
Abstract:: The endemic cyprinids of Lake Lanao, Philippines have been described as a species flock and are thought to be an example of explosive evolution. However, based on historical surveys, 16 of the 18 cyprinid species endemic to Lake Lanao are now believed to be extinct. Furthermore, non-native species have been...
Resource Type:: Masters Thesis
Full Text:: , Philippines Abstract approved: ________________________________________________ David B. Sampson

Evaluating the data-poor fishery stock assessment method, DB-SRA

Creator:: Owashi, Brandon R.
Abstract:: Depletion-Based Stock Reduction Analysis (DB-SRA; Dick and MacCall, 2011) is a catch-only fisheries stock assessment model that has been developed to estimate an overfishing limit (OFL) in data-poor situations. DB-SRA projects the biomass trajectories of a stock by means of a catch time series and five parameters: the instantaneous, per...
Resource Type:: Masters Thesis
Full Text:: : _______________________________________________________________________________ David B. Sampson Depletion-Based Stock Reduction Analysis (DB-SRA; Dick and MacCall, 2011

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

Feasibility of supplementary sampling of the commercial groundfish landings in Oregon using seafood plant workers

Creator:: Builder, Tonya L.
Abstract:: Fishery dependent data--length distributions, sex ratios, maturity schedules, and species composition of landed catches--are necessary for stock assessments. These data are currently collected by state port biologists using a sampling design that randomly selects samples from a small percentage of a very large target population. Sampling programs may need to...
Resource Type:: Masters Thesis
Full Text:: approved: David B. Sampson Fishery dependent datalength distributions, sex ratios, maturity schedules, and

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

Fishing location choices in Oregon trawl fisheries : are fishermen risk-averse or risk-prone?

Creator:: Trisak, Jiraporn
Abstract:: Despite the fact that fishing is an inherently uncertain business, risk has rarely been formally recognized in fisheries science or management. Few fishery management plans include any form of risk assessment and those that do focus on minimizing risk caused by uncertainty associated with markets and environmental conditions. Fishermen's attitudes...
Resource Type:: Masters Thesis
Full Text:: Choices in Oregon Trawl Fisheries: Are Fishermen Risk-averse or Risk-prone ? Abstract approved: David

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

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

Distribution and assemblages of demersal fish in Oman

Creator:: Ambusaidi, Hilal Saud
Abstract:: The Sultanate of Oman has 1700 km of coastline extending from the Arabian Gulf south to the Arabian Sea. The demersal fish distributions and assemblages have not previously been well defined. In winter, variations in the oceanography of the area are minimal. In summer, however, the Arabian Sea is strongly...
Resource Type:: Masters Thesis
Full Text:: approved: David B Sampson The Sultanate of Oman has 1700 km of coastline extending from the Arabian

ScholarsArchive@OSU

Growth, residence, and movement of juvenile Chinook salmon within restored and reference estuarine marsh channels in Salmon River, Oregon

The status and life history traits of endemic, native and introduced species in Lake Lanao, Philippines

Evaluating the data-poor fishery stock assessment method, DB-SRA

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

Feasibility of supplementary sampling of the commercial groundfish landings in Oregon using seafood plant workers

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

Fishing location choices in Oregon trawl fisheries : are fishermen risk-averse or risk-prone?

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

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

Distribution and assemblages of demersal fish in Oman

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