Index Catalog // ScholarsArchive@OSU

Population genetics of ranid frogs : investigating effective population size and gene flow

Creator:: Phillipsen, Ivan C.
Abstract:: This dissertation focuses on the evolutionary forces of genetic drift and gene flow in frog populations. The balance of these two forces and the force of mutation largely determine the amount of neutral genetic variation within populations as well as the degree of genetic similarity among populations. The stochastic evolutionary...
Resource Type:: Dissertation
Full Text:: Arnold, Tiff Garcia, Julia Jones, and Dave Lytle. I appreciate all the helpful suggestions they gave me

Phylogenetic Studies in Tenebrionidae (Coleoptera) and Related Families

Creator:: Kanda, Kojun
Abstract:: In this dissertation, I present the results from three studies: (1) a phylogeny of Tenebrionoidea (Coleoptera) inferred from a seven-gene dataset derived from PCR and Sanger sequencing; (2) a phylogeny of Tenebrionidae, the largest family in Tenebrionoidea, inferred from a four-gene dataset also derived from PCR and Sanger sequencing; (3)...
Resource Type:: Dissertation
Full Text:: . Stevan Arnold, Scott Baker, Ricardo Letelier, Aaron Liston, Dave Lytle

Aquatic community responses to drought disturbance: experimental manipulations of top predator extinctions and stream drying

Creator:: Boersma, Kate S.
Abstract:: Although it is generally assumed that the intensifying abiotic environment is the primary effect of drought on aquatic organisms, drought-induced top predator extinctions may be an important underlying mechanism. I used manipulative experiments to disentangle the impacts of drying and top predator extinctions on arid-land aquatic invertebrate communities. I then...
Resource Type:: Dissertation
Full Text:: Lytle, Alix Gitelman, Selina Heppell, Stevan Arnold, and Russ Ingham stewarded my doctoral journey. I

The ontogeny and mediation of sexual size dimorphism in the red-spotted garter snake, Thamnophis sirtalis concinnus

Creator:: Lerner, Darren T.
Abstract:: A wide range of environmental and physiological factors influence the type and extent of sexual dimorphism found in animals. Influential factors include variable climate, competition for resources and mates, mate choice, and parental investment. In addition, some investigators attribute differences in body size to physiological factors influenced by genetic and...
Resource Type:: Masters Thesis
Full Text:: to thank him for his foresight and faith in my scientific abilities. I thank Stevan J. Arnold

Reproductive strategies of the Ocoee salamander, Desmognathus ocoee

Creator:: Adams, Erika M.
Abstract:: The majority of female animals are polyandrous: offspring within a single reproductive event are sired by more than one male. However, we lack a clear understanding of the ultimate causes of polyandry, and of the male reproductive strategies which have evolved in response to selection occurring after insemination. I addressed...
Resource Type:: Dissertation
Full Text:: PATERNTTY iN THE OCOEE SALAMANDER (DESMOGNA THUS OCOEE) Erika M. Adams, Adam G. Jones, and Stevan J. Arnold

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:: day). I would like to thank my committee members Stevan Arnold, Lynne Houck, Phillip McFadden, and

The influence of parasite ecology on the genetic structure of parasite populations

Creator:: Criscione, Charles David
Abstract:: Parasites are unique study organisms for evolutionary ecologists. Yet, molecular ecology studies on parasites have lagged far behind those on free-living organisms. The goal of the review in Chapter 2 was to illustrate areas of research that may be of particular interest in relation to the parasitic life style and...
Resource Type:: Dissertation

Population and conservation genetic structure of the Cascades frog, Rana cascadae throughout the species' range

Creator:: Monsen, Kirsten J.
Abstract:: A major goal of conservation biology is to elucidate the population genetic structure in threatened species and assess the relative importance of the evolutionary forces that shape that population genetic structure. I conducted three studies in the declining amphibian Rana cascadae to assess levels of population genetic differentiation and the...
Resource Type:: Dissertation
Full Text:: sorrows I have had over the last six years. I would like to thank my committee members Stevan Arnold

Selection on larval and adult body size in a marine fish: potential evolutionary responses and effects on population dynamics

Creator:: Johnson, Darren W.
Abstract:: Many species have complex life cycles in which a dispersive larval stage is followed by a relatively sedentary adult stage. For such species, reproductive output is often high and large variation in survivorship throughout early life-history phases (eggs and larvae) can lead to dramatic fluctuations in recruitment which may in...
Resource Type:: Dissertation
Full Text:: research. Steve Arnold provided valuable advice on evolutionary quantitative genetic theory and

Evolution of sodefrin precursor pheromones in salamandrid newts

Creator:: von Reis, Martha
Abstract:: An ancient pheromonal signal is found in aquatic courting salamandrids and terrestrial courting plethodontids, two highly divergent salamander families. In the aquatic courting salamandrids Cynops pyrrhogaster and C. ensicauda, the decapeptide sodefrin is cleaved from a larger 189 amino acid Sodefrin Precursor Factor (SPF) protein and released from a gland...
Resource Type:: Masters Thesis
Full Text:: . While at OSU, I have been lucky enough to also have Stevan Arnold and Lynne Houck as mentors. I am

ScholarsArchive@OSU

Population genetics of ranid frogs : investigating effective population size and gene flow

Phylogenetic Studies in Tenebrionidae (Coleoptera) and Related Families

Aquatic community responses to drought disturbance: experimental manipulations of top predator extinctions and stream drying

The ontogeny and mediation of sexual size dimorphism in the red-spotted garter snake, Thamnophis sirtalis concinnus

Reproductive strategies of the Ocoee salamander, Desmognathus ocoee

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

The influence of parasite ecology on the genetic structure of parasite populations

Population and conservation genetic structure of the Cascades frog, Rana cascadae throughout the species' range

Selection on larval and adult body size in a marine fish: potential evolutionary responses and effects on population dynamics

Evolution of sodefrin precursor pheromones in salamandrid newts

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