Index Catalog // ScholarsArchive@OSU

Cannibalism in larvae of the long-toed salamander, Ambystoma macrodactylum

Creator:: Wildy, Erica Lynn
Abstract:: Predator-prey interactions have historically been studied to explain patterns of organization observed in populations and communities. They have also been important in understanding the evolution of antipredator responses in prey and counterstrategies in predators. Despite the breadth of knowledge that exists for heterospecific interactions, relatively few studies have investigated the...
Resource Type:: Dissertation
Full Text:: the Long-Toed Salamander, Ambystoma macrodactylum by Erica Lynn Wildy A THESIS submitted to

The use of molecular biological methods to assess the effects of endocrine disrupting chemicals and natural hormones on growth in the sheepshead minnow (Cyprinodon variegatus)

Creator:: Knoebl, Iris
Abstract:: The work presented in this dissertation examines possible modes of action for growth inhibition by anthropogenic endocrine disrupting chemicals (EDCs) as well as endogenous hormones associated with growth in fish. Using the sheepshead minnow (SHM) (Cyprinodon variegatus) as a model, I developed methods to examine perturbations in the endocrine axis...
Resource Type:: Dissertation
Full Text:: the Sheepshead Minnow (Ctjprinodon varieqatus). Abstract approved: Carl B. Schreck The work

Physiology of interrenal function in juvenile coho salmon (Oncorhynchus kisutch) and effects of hatchery rearing practices

Creator:: Patino, Reynaldo
Abstract:: Periodic determinations of plasma hormone levels suggested that changes in interrenal activity are unrelated to changes in thyroidal or gonadal activity during development (smoltification) of juvenile coho salmon (Oncorhynchus kisutch). Moreover, in an experiment where fish were reared under various conditions of crowding and water inflow rate, it appeared that...
Resource Type:: Dissertation
Full Text:: Doctor of Philosophy Abstract approved: Carl B. Schreck Periodic determinations of plasma hormone

Aspects of the social structure of the California ground squirrel (Spermophilus beecheyi) in western Oregon

Creator:: Bickford, Carol E.
Abstract:: A population of Spermophilus beecheyi was studied to determine patterns of individual spacing, behavioral interactions among different sex and age classes, and the relationship between aspects of S. beecheyi social structure and sociality to those of other sciurids. Research was conducted on a population of squirrels living in an abandoned...
Resource Type:: Masters Thesis
Full Text:: Aggression: Lateral Curve 21 4a-b Male Paw Push (MPP) 22 4c-d Male Paw Push (continued) 23 5 Rear Sniff

Neural regulation of the heart and egg-laying behavior in the nudibranch mollusc Archidoris montereyensis

Creator:: Wiens, Brenda L.
Resource Type:: Dissertation
Full Text:: B, myomodulin, and FMRFa) had excitatory actions, acetylcholine had inhibitory actions, while

Stress and reproduction in male garter snakes

Creator:: Moore, Ignacio T.
Abstract:: Animals respond to stressful situations with increases in plasma levels of glucocorticoid stress hormones. These hormones originate from the adrenal cortex in response to stimulation of the hypothalamic-pituitary-adrenal axis. Glucocorticoids (corticosterone in reptiles) function to mobilize energy and suppress unnecessary functions until the stress passes. Among these immediately unnecessary functions...
Resource Type:: Dissertation
Full Text:: ) corticosterone and (b) testosterone levels of control (0; N= 18) and capture-stress (U; N= 18) male red- sided

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
Full Text:: these sex-related behaviors include nest building (Evans, 1997), territoriality (Mathis et al., 1995

The ecological and behavioral dynamics of breeding in three sympatric anuran amphibians

Creator:: Olson, Deanna H.
Abstract:: Breeding ecology and behavior were investigated in a field study of three sympatric anuran amphibians in the Oregon Cascade Mountains: the western toad (Bufo boreas), the Cascades frog (Rana cascadae) and the Pacific treefrog (Hyla regilla). A comprehensive study of the western toad mating system was conducted at three populations...
Resource Type:: Dissertation
Full Text:: Department of Zoology have influenced me greatly in my graduate career: Jane Lubchenco, Mark Hixon, Lynn

Peptidergic regulation of visceral motor circuits in the Sea Hare, Aplysia californica

Creator:: Morgan, James L. M.
Resource Type:: Dissertation
Full Text:: circuits either to (a) regulate output of tonically controlled end-organs or (b) modulate expression of

Interaction of selenium with cadmium and mercury in semen and reproductive tissues: in vivo and in vitro studies

Creator:: Alabi, Nathaniel Sigismund
Abstract:: Studies were conducted to investigate the metabolism of selenium (Se) , and the influences of Se on the metabolism of cadmium (Cd) and inorganic mercury (Hg) in rats, and in ram semen in vitro. Se-deficient (-Se) or Se-adequate (+Se) rats were injected intraperitoneally with either ¹⁰⁹CdCl₂ (5 μCi/rat) or ²⁰³HgN0₃...
Resource Type:: Dissertation
Full Text:: Dialysis and Acid Hydrolysis of Spermatozoa Amino Acid Analysis of Hydrolyzed Spermatozoa B. In Vivo

ScholarsArchive@OSU

Cannibalism in larvae of the long-toed salamander, Ambystoma macrodactylum

The use of molecular biological methods to assess the effects of endocrine disrupting chemicals and natural hormones on growth in the sheepshead minnow (Cyprinodon variegatus)

Physiology of interrenal function in juvenile coho salmon (Oncorhynchus kisutch) and effects of hatchery rearing practices

Aspects of the social structure of the California ground squirrel (Spermophilus beecheyi) in western Oregon

Neural regulation of the heart and egg-laying behavior in the nudibranch mollusc Archidoris montereyensis

Stress and reproduction in male garter snakes

Pheromonal mediation of reproductive behavior in the brown tree snake

The ecological and behavioral dynamics of breeding in three sympatric anuran amphibians

Peptidergic regulation of visceral motor circuits in the Sea Hare, Aplysia californica

Interaction of selenium with cadmium and mercury in semen and reproductive tissues: in vivo and in vitro studies

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