Index Catalog // ScholarsArchive@OSU

Diving into Diversity: Fish Populations and Climate Resilience in an Endorheic Basin

Creator:: Dew, Aleah
Abstract:: The Goose Lake Basin, situated on the border of Oregon and California, USA, faces significant challenges from drought, wildfire, and other environmental stressors. This region hosts numerous endemic fish species such as the Goose Lake redband trout (Oncorhynchus mykiss newberri), Goose Lake lamprey (Entosphenus sp.), Goose Lake tui chub (Siphateles...
Resource Type:: Masters Thesis
Full Text:: affect native fish in the Goose Lake Basin and other arid lands aquatic ecosystems. A key objective of

Coexistence of top predators in headwater streams : pathways of intraguild predation between Pacific Giant salamander larvae and cutthroat trout

Creator:: Rundio, David E.
Abstract:: The coexistence of multiple predators may have important consequences for the structure and function of communities. Interactions between predators may strongly affect their combined direct and indirect effects on prey populations and lower trophic levels. Predators often have size-structured populations, which may result in intraguild predation characterized by complex trophic...
Resource Type:: Masters Thesis
Full Text:: ) and coastal cutthroat trout (Oncorhynchus clarki clarki) are the top predators in many perennial

Combining Disparate Data Sources with Ecosystem and Integrated Models: Case Studies for Improving Management of Protected Species

Creator:: Chasco, Brandon E.
Abstract:: Globally, the number of threatened species is increasing and conserving them is a high priority to the scientific community. Assessing the status of these protected species is challenging due to missing, contested, and or contradictory data streams. Integrated models (IMs) provide a statistical framework for combining disparate data sources to...
Resource Type:: Dissertation
Full Text:: , and marine mammals in the United States. While Chapters 2 and 3 adhere to the statistical

Assessing the Effects of Contemporary Forest Harvest on Headwater Stream Food Webs in the Oregon Coast Range

Creator:: Mowlds, Emilee A.
Abstract:: Food webs are fundamental in ecology, as they offer a way to better understand the interrelatedness, connectivity, and complexity within a given ecosystem. The use of network analysis to model food webs can provide insights about the importance of physical templates on the organization of biological systems in streams using...
Resource Type:: Masters Thesis
Full Text:: statistically significant differences in the response of food web metrics (Om, APL, LD and Co) the year before

An Evaluation of the Effects of the Parasite Salmincola californiensis on At-Risk Chinook Salmon Populations

Creator:: Gardner, Ethan N.
Abstract:: Once abundant in their native range, Pacific salmon species (Oncorhynchus spp.) were widely distributed across the northern Pacific Rim from South Korea and Japan to the Sacramento River in California. Remaining populations are subject to population-level threats, including pathogens. The freshwater parasitic copepod Salmincola californiensis is associated with the reduced...
Resource Type:: Masters Thesis
Full Text:: prevalence and intensity in reservoirs and environmental factors and week of the year were modeled using a

Downstream Rearing Chinook Salmon (Oncorhynchus tshawytscha) in the Upper Mainstem of the John Day River

Creator:: Scheu, Michael P.
Abstract:: Juvenile Chinook Salmon (Oncorhynchus tshawytscha) leave the natal reach at different times and move downstream at different rates which can increase their productivity by allowing them to utilize habitats on different temporal scales and spreading risk of localized stochastic events. This life history diversity can also allow fish to adapt...
Resource Type:: Masters Thesis
Full Text:: ), life history (LH), year of tagging (Year), and the odds of detection in the Columbia River of

Accounting for the Effects of Fish Detectability in Fishery-independent Surveys

Creator:: McLeod, Montana
Abstract:: In recent years, there has been an increase in episodic coastal hypoxia along the mid to inner-shelf waters off the Oregon Coast. Wind-driven coastal upwelling events can exacerbate the magnitude of these hypoxic events, causing extremely hypoxic bottom water (<0.5ml l-1 dissolved oxygen) to move onshore towards the inner shelf....
Resource Type:: Masters Thesis
Full Text:: model variables and parameters can be found in Appendix B. The time step of our model was one year

Lamprey of the Goose Lake Basin: A Multi-Scale Habitat & Distribution Analysis

Creator:: Dickey, Jacob C.
Abstract:: Two ecologically important lamprey species found in the endorheic Goose Lake Basin face conservation threats; however, relatively little is known about their habitat needs or spatial distribution. Lamprey and their habitat are often found to be patchy; to evaluate these relationships for the lamprey in this basin, I utilized a...
Resource Type:: Masters Thesis
Full Text:: in lamprey biology and conservation. I also want to thank Dr. Michael Dumelle for offering his

Decision-making in the Face of Uncertainty: Examining the Interplay between Social Relations and Loss Aversion in Small-Scale Fishing Communities in Jamaica

Creator:: Wade, Eric A.
Abstract:: Decision-making is a highly complex process influenced by the values, attitudes, and cognitive biases of the decision-maker. The classical model of decision-making fails to fully incorporate how decisions are made in situations of uncertainty, where having complete knowledge of all possible outcomes and alternatives is not always possible. In highly...
Resource Type:: Dissertation
Full Text:: of trust and influence as tie attributes in the information shared by fishing actors. The results

Juvenile Salmonid Rearing Potential in Seasonally Disconnected Floodplain Habitats in the Skagit River, WA

Creator:: Hicks, Madeline C.
Abstract:: Our understanding of seasonally disconnected floodplains and how they function to support rearing salmonids in the Pacific Northwest is limited. Past studies have found that these dynamic habitats may provide high-risk, high-reward trade-offs for rearing fish. High prey densities and optimal temperatures allow for accelerated growth, but low water levels...
Resource Type:: Masters Thesis
Full Text:: habitat shifts and migration. Larger age-1 fish were replaced by a smaller age-0 cohort in the spring

ScholarsArchive@OSU

Diving into Diversity: Fish Populations and Climate Resilience in an Endorheic Basin

Coexistence of top predators in headwater streams : pathways of intraguild predation between Pacific Giant salamander larvae and cutthroat trout

Combining Disparate Data Sources with Ecosystem and Integrated Models: Case Studies for Improving Management of Protected Species

Assessing the Effects of Contemporary Forest Harvest on Headwater Stream Food Webs in the Oregon Coast Range

An Evaluation of the Effects of the Parasite Salmincola californiensis on At-Risk Chinook Salmon Populations

Downstream Rearing Chinook Salmon (Oncorhynchus tshawytscha) in the Upper Mainstem of the John Day River

Accounting for the Effects of Fish Detectability in Fishery-independent Surveys

Lamprey of the Goose Lake Basin: A Multi-Scale Habitat & Distribution Analysis

Decision-making in the Face of Uncertainty: Examining the Interplay between Social Relations and Loss Aversion in Small-Scale Fishing Communities in Jamaica

Juvenile Salmonid Rearing Potential in Seasonally Disconnected Floodplain Habitats in the Skagit River, WA

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