Index Catalog // ScholarsArchive@OSU

Polygyny in the bobolink : habitat quality and the adaptive complex

Creator:: Martin, Stephen George, 1941-
Abstract:: The adaptiveness of polygyny in passerines poses a particularly intriguing problem. The altricial young of this group require extended parental care, but young of polygynous pairings generally lack the undivided attention of the male which young of monogamous pairings receive. Polygynous offspring may thus be undernourished and experience greater mortality....
Resource Type:: Dissertation
Full Text:: vegetation were made at 1921 randomly-located sample points within an 11. 3 ha sedge- grass meadow in south

Cholinesterase activity in the neural retina of the developing chick

Creator:: Rynd, Lori Suzanne
Abstract:: Developmental changes in the enzymes acetylcholinesterase (EC 3.1.1.7) and pseudocholinesterase (EC 3.1.1.8) were examined in ovo and in vitro in the neural retina of the developing chick. In addition, investigations of cellular interactions and hormones as possible control mechanisms of enzyme synthesis were made. The specific activity of acetylcholinesterase, a...
Resource Type:: Dissertation
Full Text:: CHICK Abstract appraveda Redacted for privacy r. John E,Rorris Developmental changes in the enzymes

The behavior of the pea crab Fabia subquadrata in relation to its mussel host, Mytilus californianus

Creator:: Lidrich, Joseph Stanley
Abstract:: The pea crab Fabia subquadrata is frequently found as a symbiont of mussels, living within the mantle cavity. This study examined the nature of this symbiotic relationship by recording the pattern of distribution of individuals in a mussel bed, testing responsiveness to host secretions, and observing the feeding mechanics and...
Resource Type:: Dissertation
Full Text:: (Atkins, 1926, 1954, 1958; Christensen and McDermott, 1958; McDermott, 1962a; Orton, 1921, 1927; Stauber

Nasal turbinates and the evolution of mammalian endothermy

Creator:: Hillenius, Willem J.
Abstract:: Although endothermy is one of the most significant evolutionary developments in the vertebrates, its origins among extinct taxa have traditionally been difficult to determine. Endothermy is primarily an attribute of the "soft anatomy," and its key features, such as complex lungs, elevated blood oxygen carrying capacity and mitochondrial density, do...
Resource Type:: Dissertation

Sea urchin eggs, Calcium and magnesium flux in dividing sea urchin eggs

Creator:: Kleinschuster, Stephen John
Abstract:: This study was initiated to determine the concentration of magnesium and calcium in dividing eggs of the sea urchin Stroncavocentrotus purpuratus and to explore the relationship between these ions and mitotic events. Samples of developing eggs, maintained at 15°C, were taken at ten-minute intervals from fertilization through the second cleavage,...
Resource Type:: Dissertation
Full Text:: AN ABSTRACT OF THE THESIS OF STEPHEN JOHN KLEINSCHUSTER for the DOCTOR OF PHILOSOPHY (Name) (Degree

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
Full Text:: 2 AN ABSTRACT OF THE DISSERTATION OF John M. Romansic for the degree of Doctor of Philosophy

A histological study of the digestive system of Ascaphus truei (Stejneger)

Creator:: Belton, John Clair
Resource Type:: Masters Thesis
Full Text:: JOHN CLAIH BELTOIT A THESIS submitted to OiIEGON STATE UNI VEaSITY in partial fulfilirient of

Genetic and environmental influences upon 3X aneuploid viability in Drosophila melanogaster (Meigen)

Creator:: Neeley, John Charles, 1938-
Resource Type:: Dissertation
Full Text:: viability in Drosophila melanogaster (meigen) AN ABSTRACT OF THE THESIS OF JOHN CHARLES NEELEY for the

Regulation of the development of sex-specific genital muscles by the doublesex gene

Creator:: Merritt, Thomas J. S.
Resource Type:: Masters Thesis
Full Text:: members of my committee, Carol Rivin, John Morris and Belinda King, for doing all those things that

Neuronal and hormonal control of the vascular system of the marine mollusc, Aplysia californica

Creator:: Ligman, Scott H.
Abstract:: The vascular system of Aplysia californica is a simple visceromotor system with three main arteries innervated by a small pool of identified neurons. I used this system to study the functions of neuropeptide transmitters and their actions on neural and muscle tissues. A central finding of this study is that...
Resource Type:: Dissertation
Full Text:: the members of my doctoral committee: Chris Bayne, Brian Croft, Frank Moore, John Morris, Tom Murray

ScholarsArchive@OSU

Polygyny in the bobolink : habitat quality and the adaptive complex

Cholinesterase activity in the neural retina of the developing chick

The behavior of the pea crab Fabia subquadrata in relation to its mussel host, Mytilus californianus

Nasal turbinates and the evolution of mammalian endothermy

Sea urchin eggs, Calcium and magnesium flux in dividing sea urchin eggs

The effects of multiple pathogens on amphibians in the Pacific Northwest

A histological study of the digestive system of Ascaphus truei (Stejneger)

Genetic and environmental influences upon 3X aneuploid viability in Drosophila melanogaster (Meigen)

Regulation of the development of sex-specific genital muscles by the doublesex gene

Neuronal and hormonal control of the vascular system of the marine mollusc, Aplysia californica

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