Index Catalog // ScholarsArchive@OSU

Ecology of the northern subpopulation of northern anchovy (Engraulis mordax) in the California Current large marine ecosystem

Creator:: Litz, Marisa N. C.
Abstract:: Northern anchovy (Engraulis mordax) are a dominant forage fish in the California Current large marine ecosystem (CCLME). However, little is known about northern anchovy abundance, distribution, age structure, or population fluctuations relative to ocean conditions in the eastern boundary upwelling system off the U.S. West Coast. This thesis includes three...
Resource Type:: Masters Thesis
Full Text:: Ecosystem Abstract approved: Selina S. Heppell Northern anchovy (Engraulis mordax) are a dominant forage

Vertebral elemental markers in elasmobranchs : potential for reconstructing environmental history and population structure

Creator:: Smith, Wade D.
Abstract:: Differences in the chemical composition of calcified structures can be used to reveal natal origins, connectivity, metapopulation structure, and reconstruct the environmental history or movement patterns of many marine organisms. Sharks, skates, and rays (elasmobranchs) lack the calcified structures, known as otoliths, that are typically used for geochemical studies of...
Resource Type:: Dissertation
Full Text:: . Selina S. Heppell, Jessica A. Miller, Zanna Chase, Bruce McCune, and Christian Langpap - for their

It’s in Their Bones: Ecological Drivers of Kemp’s Ridley Sea Turtle (Lepidochelys kempii) Somatic Growth and Population Dynamics

Creator:: Ramirez, Matthew D.
Abstract:: Somatic growth variation manifests from the cumulative effects of a suite of biological, ecological, and environmental processes and can have profound effects on individual fitness and species population dynamics. As ectotherms whose growth dynamics are greatly influenced by environmental factors, sea turtles display considerable variation in somatic growth within and...
Resource Type:: Dissertation
Full Text:: Selina Heppell whose wisdom, encouragement, and guidance allowed me to flourish as a researcher. Her

Maternal effects, the environment, and age structure: A mechanistic fine-scale approach to describe a complex set of factors contributing to larval growth and survival

Creator:: Arnold, Linsey M.
Abstract:: The relationship between population characteristics and population productivity is fundamental to sustainable fisheries management, but predicting productivity remains a challenging task. Proposed mechanisms driving the variability in productivity at a given population size have included environmental and demographic factors related to the age structure of the population, but the broad-scale...
Resource Type:: Dissertation
Full Text:: Chapter 2 was funded by a grant to Scott Heppell and Selina Heppell by the North Pacific Research Board

A population viability analysis of the Oregon chub (Oregonichthys crameri) in the Willamette Valley, Oregon

Creator:: Peterson, Erin
Abstract:: The Oregon chub (Oregonichthys crameri) is a small minnow (Family: Cyprinidae) endemic to Oregon’s Willamette Valley. In 1993, the Oregon chub was listed as endangered because of habitat loss and predation and competition by nonnative fishes. Conservation efforts by the Oregon Department of Fish and Wildlife (ODFW) and other agencies...
Resource Type:: Honors College Thesis
Full Text:: : _____________________________________________________________ Selina Heppell The Oregon chub (Oregonichthys crameri) is a small minnow

Defining habitat preferences of pelagic loggerhead sea turtles (Caretta caretta) in the North Atlantic through analysis of behavior and bycatch

Creator:: McCarthy, Abigail L.
Abstract:: For many species of marine turtle the characteristics that define pelagic habitat have yet to be fully identified. A better understanding of these habitat characteristics is critical to reduce high seas fisheries interactions with turtles, especially as the status of many turtle populations has placed them on the threatened or...
Resource Type:: Masters Thesis
Full Text:: Department of Fisheries and Wildlife for an Oregon Laurels scholarship and a Scott scholarship. Dr. Molly

Evaluation of data-poor and age-structure management strategies for west coast rockfish

Creator:: Arnold, Linsey M.
Abstract:: Management strategies to prevent overfishing while achieving optimum yield vary according to the available data and life history of the fished stock. I evaluated two sets of management strategies for Pacific coast rockfish: strategies to set harvest limits for data-poor stocks, and strategies intended to protect the age structure of...
Resource Type:: Masters Thesis
Full Text:: approved: __________________________________________________________ Selina S. Heppell

Quantitative Tools for Monitoring Strategy Evaluation and Assessment of Sea Turtle Populations

Creator:: Piacenza, Susan E. H.
Abstract:: Green sea turtles, Chelonia mydas, have endangered and threatened populations globally, but several populations show signs of population recovery. In Hawaii, nesting female green turtles have increased 5.7% year⁻¹ since 1973, but wide fluctuations in census counts of nesting females make recovery diagnosis difficult. For effective management planning, it is...
Resource Type:: Dissertation
Full Text:: monitoring at a key moment in the MoSE development. I sincerely thank my Heppell Lab community for

Community-based sea turtle monitoring and management at Helen Reef, Hatohobei State, Republic of Palau

Creator:: Barr, Julie M.
Abstract:: Remote areas are frequently homes to regional subpopulations of endangered green sea turtles (Chelonia mydas) and their essential habitat. Local communities are often the users and primary stewards of this valuable and charismatic resource. Recognizing this, a Hatohobeian community group in Palau has engaged in longterm monitoring and conservation management...
Resource Type:: Masters Thesis
Full Text:: (Heppell et al. 1996) the crabs probably do not pose a significant threat to the population of green

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:: : ______________________________________________________ Selina S. Heppell Globally, the number of threatened species is increasing and

ScholarsArchive@OSU

Ecology of the northern subpopulation of northern anchovy (Engraulis mordax) in the California Current large marine ecosystem

Vertebral elemental markers in elasmobranchs : potential for reconstructing environmental history and population structure

It’s in Their Bones: Ecological Drivers of Kemp’s Ridley Sea Turtle (Lepidochelys kempii) Somatic Growth and Population Dynamics

Maternal effects, the environment, and age structure: A mechanistic fine-scale approach to describe a complex set of factors contributing to larval growth and survival

A population viability analysis of the Oregon chub (Oregonichthys crameri) in the Willamette Valley, Oregon

Defining habitat preferences of pelagic loggerhead sea turtles (Caretta caretta) in the North Atlantic through analysis of behavior and bycatch

Evaluation of data-poor and age-structure management strategies for west coast rockfish

Quantitative Tools for Monitoring Strategy Evaluation and Assessment of Sea Turtle Populations

Community-based sea turtle monitoring and management at Helen Reef, Hatohobei State, Republic of Palau

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

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