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Filtering by: Creator Brown, Sean P. Remove constraint Creator: Brown, Sean P. Degree Field Zoology Remove constraint Degree Field: Zoology Degree Name Doctor of Philosophy (Ph.D.) Remove constraint Degree Name: Doctor of Philosophy (Ph.D.)

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  • The effects of community composition, landscape structure, and climate on host-pathogen interactions

    Creator:
    Moore, Sean M.
    Abstract:
    Like other species interactions in ecological systems, host-pathogen interactions are influenced by environmental factors, landscape characteristics and the broader community context. My thesis explores the potential influences of food-web interactions (Chapter 2), climate change (Chapter 3), landscape structure and host movement patterns (Chapter 4), and the combined influences of local...
    Resource Type:
    Dissertation
    Full Text:
    AN ABSTRACT OF THE DISSERTATION OF Sean M. Moore for the

  • Reproductive biology and behavior of the brown tree snake (Boiga irregularis) on Guam.

    Creator:
    Waye, Heather L.
    Abstract:
    While there are many more species of reptiles in the tropics than in temperate latitudes, relatively little is known about the natural history of tropical species of snakes. Even basic information, such as reproductive ecology and behavior, is lacking. Patterns of reproduction in tropical species differ from patterns in temperate...
    Resource Type:
    Dissertation
    Full Text:
    Biology and Behavior of the Brown Tree Snake (Boiga irregularis) on Guam. Abstract approved

  • Pheromonal mediation of reproductive behavior in the brown tree snake

    Creator:
    Greene, Michael John
    Abstract:
    In animals, reproductive behaviors serve to attract individuals together during the breeding season and to coordinate the behavioral and physiological states of individuals so that mating can successfully occur. In snakes, the various reproductive behaviors including courtship, mating, courtship inhibition, male combat and trailing are mediated primarily by pheromones. Pheromones...
    Resource Type:
    Dissertation
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    of a brown tree snake management (Mason, in press). References Abelson, P. H., 1985. Use of and

  • Size variation and food habits of larval bullfrogs, Rana catesbeiana Shaw, in western Oregon

    Creator:
    Brown, Randall Errol
    Abstract:
    An investigation was made of the factors which cause differences in growth rates and transformation size of bullfrog tadpoles under natural conditions. Tadpoles and algal samples were collected from two.adjacent farm ponds of similar size during the eighteen months of the study. It was found that the tadpoles in one...
    Resource Type:
    Dissertation
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    )00 U) a, 100 21 Brown Swamp <>- -O Trout Pond irrigation Pond .- w rww I WJ p Figure 2

  • Isolation and characterization of a larval crustacean salt gland from the brine shrimp Artemia salina

    Creator:
    Lowy, Robert Joel
    Abstract:
    A method for isolating the salt gland (SG) from the larval brine shrimp has been developed. This extra-renal organ is removed from 5-10% of Stage Inauplii by vortexing after incubating the animals at 37°C for 8 hours in a saline solution buffered with 100 mM sodium phosphate at pH 7.6....
    Resource Type:
    Dissertation
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    : Redacted for Privacy Dr. Frank P. Co(nte A method for isolating the salt gland (SG) from the larval brine

  • Reproductive implications of parasitic infections and immune challenges in garter snakes

    Creator:
    Uhrig, Emily J.
    Abstract:
    Parasitic infections and immune challenges can affect host reproductive fitness and, ultimately, the evolution of host populations in a myriad of ways. The fitness implications of parasitic infections range from increased host mortality to subtle changes in reproductive investment. From alterations of behaviors, sexual signaling, and competitive ability to changes...
    Resource Type:
    Dissertation
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    ability to cause damage or disease (Falkow 1997; Casadevall and Pirofski 1999; Brown et al. 2006; Méthot

  • 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
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    , the perennial brown algal blade Phaeostrophion irregulare and the annual green algal blade Ulva sp

  • Phenotypic variation in the sexual attractiveness pheromone of the red-sided garter snake, Thamnophis sirtalis parietalis

    Creator:
    LeMaster, Michael P.
    Abstract:
    Pheromones are chemical cues produced by organisms that affect the behavior and/or physiology of conspecifics. The orchestration of reproductive behaviors in many animals depends on the expression of sex pheromones. In insects, intraspecific variation in sex pheromone expression is commonly observed and often influences social interactions between individuals. To what...
    Resource Type:
    Dissertation
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    the red-sided garter snake, Thamnophis sirtalis parietalis AN ABSTRACT OF THE THESIS OF Michael P

  • The role of avian predators in an Oregon rocky intertidal community

    Creator:
    Marsh, Christopher P.
    Abstract:
    Birds affected the community structure of an Oregon rocky shore by preying upon mussels (Mytilus spp.) and limpets (Collisella spp.). The impact of such predation is potentially great, as mussels are the competitively dominant mid-intertidal space-occupiers, and limpets are important herbivores in this community. Prey selection by birds reflects differences...
    Resource Type:
    Dissertation
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    . THE ROLE OF AVIAN PREDATORS IN AN OREGON ROCKY INTERTIDAL COMMUNITY by Christopher P. Marsh A

  • Dogs, Death, and Dietary Breadth: Insights into the Macroecology and Macroevolution of Canidae

    Creator:
    Tanis, Brian P.
    Abstract:
    The size, shape, and stability of a species’ dietary niche can both influence and reflect a variety of biological patterns, including species interactions, extinction risk, and ecosystem function. This is particularly apparent when dietary changes manifest at ecosystem and clade scales to profoundly affect macroecological and macroevolutionary trajectories. However, many...
    Resource Type:
    Dissertation
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    ABSTRACT OF THE DISSERTATION OF Brian P. Tanis for the degree of Doctor of Philosophy in Zoology