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Filtering by: Creator Blaustein, Andrew R. Remove constraint Creator: Blaustein, Andrew R. Resource Type Masters Thesis Remove constraint Resource Type: Masters Thesis

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  • The Behavioral Responses of Western Toad (Anaxyrus boreas) Larvae to Simultaneous Stressors

    Creator:
    Reynolds, Emily R.
    Abstract:
    Animals can be naturally exposed simultaneously to multiple stressors. These include habitat changes, contaminants, diseases, invasive species, parasitism, and predation. Exposure to various combinations of biotic and abiotic stressors may induce behavioral changes that affect the way an individual interacts within its environment.Like other groups of organisms, amphibians are exposed...
    Resource Type:
    Masters Thesis
    Full Text:
    ) Larvae to Simultaneous Stressors Abstract Approved: Andrew R. Blaustein Animals can be

  • Unpalatability as an antipredator defense in anuran larvae

    Creator:
    Peterson, Jeffrey A.
    Abstract:
    The tadpoles of several anuran species with groupforming larvae are relatively unpalatable to many of their potential predators. To more fully understand the role of palatability and its relationship to group formation as an antipredator defense in anuran amphibian larvae, I investigated the palatabilities of the larvae of three species...
    Resource Type:
    Masters Thesis
    Full Text:
    approved: Redacted for Privacy 'Andrew R. Bldis`tein-77 The tadpoles of several anuran species with group

  • The Effects of Nitrate and a Pathogenic Fungus, Batrachochytrium dendrobatidis, on Amphibians

    Creator:
    Negru, Delia
    Abstract:
    The current rate of global biodiversity loss and extinctions is unparalleled and a major concern. Freshwater organisms are facing particularly rapid rates of biodiversity loss. Amphibians, which require an aquatic environment for part of their life cycle, are one of the most vulnerable vertebrate groups. Amphibians are experiencing population declines,...
    Resource Type:
    Masters Thesis
    Full Text:
    Andrew R. Blaustein The current rate of global biodiversity loss and extinctions is

  • An investigation of the alarm response in anuran amphibian larvae

    Creator:
    Hews, Diana K.
    Abstract:
    The results of my research suggest that tadpoles of the Western toad (Bufo boreas) and the Cascades frog (Rana cascadae) display an alarm response to chemicals from injured conspecific tadpoles. Furthermore, results suggest that the Bufo boreas alarm response can be elicited by a natural predator when it feeds on...
    Resource Type:
    Masters Thesis
    Full Text:
    Larvae. Abstract approved: Redacted for privacy Andrew R. Blaustein The results of my research

  • The effects of predation on anuran metamorphosis

    Creator:
    DeVito, Jill
    Abstract:
    Many organisms with complex life cycles undergo transition periods associated with increased vulnerability to predation. Several evolutionary adaptations have been proposed as antipredator defenses for organisms during risky transition periods. These include: shortening of the transition period, parental care, cryptic coloration, and synchrony of risky transitions with large numbers of...
    Resource Type:
    Masters Thesis
    Full Text:
    also thank the members of my committee, Andrew Blaustein, Joseph Beatty, Robert Mason, Gordon Reeves

  • Kin recognition in Townsend's chipmunks (Tamias townsendii)

    Creator:
    Fuller, Claire A.
    Abstract:
    Juvenile T. townsendii were tested at 55-62 days of age to determine whether 1) they could distinguish kin from non-kin and 2) whether this ability was based on familiarity or on genetic relatedness. Seventy-three pups were observed in 68 pairwise tests. The frequencies and durations of 8 behaviors as well...
    Resource Type:
    Masters Thesis
    Full Text:
    ) Abstract approved:_Redacted for Privacy__ Andrew R. Blaustein Juvenile T. townsendii were tested at 55-62

  • The Role of Emerging Pathogens in Amphibian Population Declines : Experimental Evidence

    Creator:
    Hambalek, Natalie M.
    Abstract:
    Rapid rates of biodiversity loss have supported the notion that Earth is experiencing a sixth major extinction event. The causes of worldwide biodiversity loss are multifaceted and context dependent. One of the most prominent groups experiencing population declines and extinctions are amphibians. Several pathogens and their associated diseases are especially...
    Resource Type:
    Masters Thesis
    Full Text:
    : Experimental Evidence Abstract approved: _____________________________________________________ Andrew R

  • Experimental analysis of competition between desert rodents in Oregon

    Creator:
    Schoffelen, Emile
    Resource Type:
    Masters Thesis
    Full Text:
    Oregon Redacted for privacy Abstract approved: V Andrew R. Blaustein In the sage community of

  • Relative abundance and habitat associations of small mammals in two forest types in southern Oregon

    Creator:
    Johnston, Aaron N.
    Abstract:
    I studied small-mammal communities and their response to grazing in mixed-conifer forests and oak woodlands in the Cascade-Siskiyou National Monument in southern Oregon. My objectives were to (1) compare small-mammal communities among forest types and grazing intensities, (2) identify riparian affiliated species, and (3) describe microhabitat associations. Over two years,...
    Resource Type:
    Masters Thesis
    Full Text:
    communication of science. I also thank my committee members, Dr. John P. Hayes and Dr. Andrew Blaustein for

  • Elevational differences in UV-B response by the long-toed salamander (Ambystoma macrodactylum)

    Creator:
    Thurman, Lindsey L.
    Abstract:
    Global amphibian declines have been attributed to numerous and often synergistic causes, such as invasive species, pathogens, and ultraviolet-B (UV-B) radiation. The effects of these stressors are context dependent and can vary with location, species, and populations. As sensitivity to UV-B has shown inconsistencies across amphibian taxa, it can be...
    Resource Type:
    Masters Thesis
    Full Text:
    committee members, Dr. Andrew Blaustein and Dr. Brian Sidlauskas, helped me to reign in my ideas and