Index Catalog // ScholarsArchive@OSU

Natural history and evolution of a color polymorphism in Rana pipiens, the northern leopard frog

Creator:: Hoffman, Eric A.
Abstract:: A primary goal of population genetics is to identify the role of microevolutionary forces in producing observed patterns of molecular and phenotypic variation. I conducted four studies in the northern leopard frog, Rana pipiens, to determine just how mutation, migration, genetic drift, and selection influenced, genetic structure of mitochondrial DNA...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE DISSERTATION OF Eric A. Hoffman for the

The role of luteinizing hormone-releasing hormone in the neuroendocrine control of seasonal reproduction in male rough-skinned newts, Taricha granulosa

Creator:: Zoeller, Robert T.
Abstract:: One hypothesis proposed to explain how the endocrine system controls reproductive cycles in seasonally breeding animals is that the hypothalamus undergoes seasonal changes in sensitivity to negative feedback by gonadal steroids. The result is seasonal changes in the secretion of luteinizing hormone-releasing hormone (LHRH) and gonadotropin secretion. The present experiments...
Resource Type:: Dissertation
Full Text:: designed to test this hypothesis in a male amphibian, the rough-skinned newt. To determine whether

The role of oxygen and other environmental variables on survivorship, abundance, and community structure of invertebrate meroplankton of Oregon nearshore coastal waters

Creator:: Eerkes-Medrano, Dafne I.
Abstract:: The high productivity of Eastern Boundary Upwelling Ecosystems (EBUE), some of the most productive ecosystems in the globe, is attributed to the nutrient rich waters brought up through upwelling. Climate change scenarios for coastal upwelling systems, predict an intensification of coastal upwelling winds. Associated with intensification in upwelling are biogeochemical...
Resource Type:: Dissertation
Full Text:: , Marisa Litz, Jason Phillips, Dough Reese, Dongwha Sohn, and Cathleen Vestfals. Aside from direct

Resource allocation in four syntopic species of marine diving birds

Creator:: Scott, James Michael, 1941-
Abstract:: During 1969-1971 I studied patterns of resource allocation and behavioral interaction among Brandt's Cormorants, Pelagic Cormorants, Common Murres and Pigeon Guillemots in the area of a breeding colony on Yaquina Head on the central Oregon coast. Extensive studies of the breeding colony were combined with detailed observations of the distribution,...
Resource Type:: Dissertation
Full Text:: FOUR SYNTOPIC SPECIES OF MARINE DIVING BIROS Redacted for Privacy Abstract approved: ohn A. Wiens

Biophysical feedback mediates effects of invasive grasses on coastal dune shape

Creator:: Zarnetske, Phoebe L., Hacker, Sally D., Seabloom, Eric W., Ruggiero, Peter, Killian, Jason R., Maddux, Timothy B., and Cox, Daniel
Abstract:: Vegetation at the aquatic–terrestrial interface can alter landscape features through its growth and interactions with sediment and fluids. Even similar species may impart different effects due to variation in their interactions and feedbacks with the environment. Consequently, replacement of one engineering species by another can cause significant change in the...
Resource Type:: Article
Full Text:: coastal dune shape PHOEBE L. ZARNETSKE,1,6 SALLY D. HACKER,1 ERIC W. SEABLOOM,2 PETER RUGGIERO,3 JASON R

Community organization and succession in rocky intertidal surfgrass beds

Creator:: Turner, Teresa
Abstract:: Succession and organization of rocky intertidal zone surfgrass beds (Phyllospadix scouleri Hook) were examined experimentally at two sites on the Oregon coast. The interaction of three attributes of the plant -- high persistence, high preemption, and slow recovery -- strongly influences the organization of surfgrass beds. Permanent plots indicate that...
Resource Type:: Dissertation
Full Text:: , Phillips 1979). A third site 0.5 km south of the Squaw Island site was used to conduct a clipping

Prey selection by the tropical marine snail Thais melones : a study of the effects of interindividual variation and foraging experience on growth and gonad development

Creator:: West, Lani
Abstract:: I studied the feeding behavior of marked individuals of the carnivorous marine snail Thais melones in a rocky shore habitat of Pacific Panama. The population of snails consume a variety of invertebrate species such as bivalves, limpets, and polychaetes. Individuals exhibited a range of diet breadth, with some specialized, but...
Resource Type:: Dissertation
Full Text:: : A Study of the Effects of Interindividual Variation and Foraging Experience on Growth and Gonad

Nearshore distribution of barnacle and mussel larvae and oceanographic mechanisms of onshore transport and delivery

Creator:: Tyburczy, Joe A.
Abstract:: Recruitment of larvae from the plankton is an important determinant of community structure in marine systems. In populations of many marine species, recruitment determines the basic demographic parameters of immigration, emigration, and reproduction. Moreover, the effect of recruitment as an "ecological subsidy" can determine the strength of interactions among species...
Resource Type:: Dissertation
Full Text:: DISSERTATION OF Joe A. Tyburczy for the degree of Doctor of Philosophy in Zoology presented on

Larval dispersal in marine fishes: novel methods reveal patterns of self-recruitment and population connectivity

Creator:: Christie, Mark R.
Abstract:: Many marine fish populations are severely declining due to over-fishing, loss of both juvenile and adult habitats, and accelerating environmental degradation. Fisheries management and the implementation of marine protected areas (MPAs) and other conservation tools are currently hindered by large gaps in knowledge about larval dispersal and its subsequent effects...
Resource Type:: Dissertation
Full Text:: and Population Connectivity Abstract approved: Mark A. Hixon Many marine fish

Seasonal thermoregulation in the dark-eyed junco (Passeriformes: Junco hyemalis)

Creator:: Swanson, David Leslie
Abstract:: Winters in north-temperate climates impose high thermogenic demands upon small birds which are met by seasonal acclimatization. This thesis investigates the extent and mechanisms of seasonal acclimatization in darkeyed juncos (Junco hyemalis) inhabiting western Oregon. Although insulation is significantly increased in winter, acclimatization is primarily metabolic. Increased metabolism is required...
Resource Type:: Dissertation
Full Text:: (Passeriformes: Junco hyemalis). Abstract approved: Redacted for Privacy John/A. Ruben Winters in north

ScholarsArchive@OSU

Natural history and evolution of a color polymorphism in Rana pipiens, the northern leopard frog

The role of luteinizing hormone-releasing hormone in the neuroendocrine control of seasonal reproduction in male rough-skinned newts, Taricha granulosa

The role of oxygen and other environmental variables on survivorship, abundance, and community structure of invertebrate meroplankton of Oregon nearshore coastal waters

Resource allocation in four syntopic species of marine diving birds

Biophysical feedback mediates effects of invasive grasses on coastal dune shape

Community organization and succession in rocky intertidal surfgrass beds

Prey selection by the tropical marine snail Thais melones : a study of the effects of interindividual variation and foraging experience on growth and gonad development

Nearshore distribution of barnacle and mussel larvae and oceanographic mechanisms of onshore transport and delivery

Larval dispersal in marine fishes: novel methods reveal patterns of self-recruitment and population connectivity

Seasonal thermoregulation in the dark-eyed junco (Passeriformes: Junco hyemalis)

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