Index Catalog // ScholarsArchive@OSU

Ecological aspects of kin discriminating behavior with implications of functional value

Creator:: Hokit, D. Grant
Abstract:: To assess the context dependence of kin discriminating behavior, I examined kin-biased aggregation behavior in tadpoles of R. cascadae in different ecological conditions. I manipulated food distribution, predator presence, thermal heterogeneity, and relatedness in a multifactorial mesocosm experiment. All four factors interacted to influence tadpole dispersion. My results suggest that...
Resource Type:: Dissertation
Full Text:: committee; Andrew Blaustein, Bruce Menge, Peter Dawson, Joseph Beatty, Robert Anthony and William Pearcy

The effects of multiple pathogens on amphibians in the Pacific Northwest

Creator:: Romansic, John M.
Abstract:: The earth is undergoing a “biodiversity crisis” characterized by loss of populations, species, genetic diversity, and ecosystem services. Part of this crisis consists of population declines, extinctions, and increased incidence of deformities in amphibians. It is unknown whether deformities contribute to these declines. Many cases of population declines in amphibians...
Resource Type:: Dissertation

The fine structure of spermatid differentiation in the mussel, Mytilus edulis, Linn

Creator:: Longo, Frank J., 1939-
Abstract:: The spermiogenesis of Mytilus edulis (a marine mussel) has been studied, employing techniques of light and electron microscopy and cytochemical preparations. The observations trace the development of the acrosomal complex, the nucleus, the mitochondrial middle-piece, and the flagellum. In early spermatids numerous membrane-bounded proacrosomal vesicles arise from several Golgi complexes...
Resource Type:: Dissertation
Full Text:: Mussel, Mytilus Edulis, Linn. AN ABSTRACT OF THE THESIS OF Frank Joseph Longo in for the Ph. D

Epithelial ultrastructure in the vas deferens of the sow bug, Porcellio scaber (Latreille)

Creator:: Newstead, James Duncan MacInnes
Resource Type:: Dissertation
Full Text:: Porter and his associates (48, p. 233 -246) in micrographs of the thin region of tissue cultured

Neorickettsia helminthoeca in cell culture

Creator:: Noonan, William Edward
Abstract:: The etiologic agent of salmon poisoning disease was found to be Neorickettsia helminthoeca, although a second organism, the Elokomin fluke fever agent, may also be involved in other areas. Primary cultures of dog leucocytes were found to support the in vitro cultivation of Neorickettsia helminthoeca as were canine sarcoma 503...
Resource Type:: Dissertation
Full Text:: araldite and sectioned on a Porter-Blum MT-2 ultramicrotome with a diamond knife. Electron micrographs

Developmental cranial osteology of three species of Rana (Anura)

Creator:: Altig, Ronald Gail
Abstract:: Developmental series of Rana pretiosa (110 specimens), R. cascadae (100 specimens) and R. aurora (115 specimens) were bone stained and cleared in glycerin. The growth and developmental patterns of the skull and selected bones were followed from the first appearance of bone through adult stages. The sequential appearance of the...
Resource Type:: Dissertation
Full Text:: (Haertel, 1967) and aurora and cascadae (Porter, 1959). Ex- cept for positive proof of sympatric

The trypanosomes of the amphibia

Creator:: Lehmann, Donald Lewis
Resource Type:: Dissertation

The effects of an emerging pathogen on amphibian host behaviors and interactions

Creator:: Han, Barbara A.
Abstract:: Contemporary environmental change encompasses massive biodiversity loss and increasing numbers of emerging diseases worldwide. As part of a global biodiversity crisis, amphibians are disappearing at unprecedented rates. Batrachochytrium dendrobatidis is an emerging infectious pathogen prominently associated with many declines. Chapter 1 reviews the past decade of research on this system...
Resource Type:: Dissertation
Full Text:: convinced that you’re entirely real, but I’ll take what I can get. I love you so much. Esther and Joseph

All hosts are not created equal : variation in amphibian responses to an emerging fungal pathogen and why it matters

Creator:: Gervasi, Stephanie S.
Abstract:: Emerging infectious diseases are increasing globally and are a threat to human, wildlife, and ecosystem health. The emerging fungal pathogen, Batrachochytrium dendrobatidis (Bd), or amphibian chytrid fungus, is associated with worldwide amphibian population declines and extinctions. Bd has been found on every continent where amphibians exist and has been documented...
Resource Type:: Dissertation

Breeding habits, embryonic thermal requirements and embryonic and larval development of the Cascade frog, Rana cascadae Slater

Creator:: Sype, William E.
Abstract:: The breeding habits and embryonic thermal requirements of the Cascade frog of Oregon, Rana cascadae Slater, are described. The limits of temperature tolerance of the pre-feeding stages are from 6° to 27°C for embryos held at constant temperatures. However, for pre-feeding embryos exposed at different developmental stages for short durations...
Resource Type:: Dissertation
Full Text:: - ment; Mr. Dan Tsui, who assisted in photography; Mr. Joseph Crow, for the collection of experimental

ScholarsArchive@OSU

Ecological aspects of kin discriminating behavior with implications of functional value

The effects of multiple pathogens on amphibians in the Pacific Northwest

The fine structure of spermatid differentiation in the mussel, Mytilus edulis, Linn

Epithelial ultrastructure in the vas deferens of the sow bug, Porcellio scaber (Latreille)

Neorickettsia helminthoeca in cell culture

Developmental cranial osteology of three species of Rana (Anura)

The trypanosomes of the amphibia

The effects of an emerging pathogen on amphibian host behaviors and interactions

All hosts are not created equal : variation in amphibian responses to an emerging fungal pathogen and why it matters

Breeding habits, embryonic thermal requirements and embryonic and larval development of the Cascade frog, Rana cascadae Slater

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