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Distribution Patterns Of Pocket Gophers In The Hobble Creek Area, Utah County, Elvis J. Holt
Distribution Patterns Of Pocket Gophers In The Hobble Creek Area, Utah County, Elvis J. Holt
Theses and Dissertations
This study was initiated to investigate the distribution patterns of two species of pocket gophers, Thomomys umbrinus albicaudatus Hall and T. talpoides wasatchensis Durrant whose ranges come together in the Hobble Creek area, Utah. The effect of certain ecological factors upon their distribution was determined. The ecological factors included: vegetation and land use, soil, moisture and exposure, hybridization and interspecific competition. From morphological examination no interbreeding was detected even though the breeding seasons of the two species correspond. A limited area was found where the ranges of the two species are in contact. A lack of available moisture was determined …
Autoradiographic Localization Of Serotonin And 5-Hydroxytryptophan In The Rat Brain, Gordon Keith Matheson
Autoradiographic Localization Of Serotonin And 5-Hydroxytryptophan In The Rat Brain, Gordon Keith Matheson
Theses and Dissertations
Serotonin is a normal constituent of the brain and has been claimed to act as a neurohormonal or regulatory agent in nerve transmission. Previous workers have only studied its whole brain or subcellular particulate distribution. Because the brain itself is divided into many distinct ganglia and nuclei, the distribution of serotonin in these sites is considered to be of greater importance than either the whole brain or subcellular distribution. This paper is a study of the distribution of serotonin in particular brain sites in rats with normal and elevated levels of the amine, with and without electroshock treatment. The results …