Life Sciences Commons^™

Fescue Toxicity In Sheep: I. Effects Of Acremonium Coenophailum On Total Splanchnic And Peripheral Flux Of Energy Metabolites And Their Regulatory Hormones In Sheep. Ii. Hepatic Mixed-Function Oxidase Activity Of Sheep Fed Fungus-Infested Fescue, Ergotamine Tartrate, Cimetidine And Metoclopramide, Kenneth Patrick Zanzalari

Doctoral Dissertations

Mature ewes were equipped with catheters in the portal, hepatic, mesenteric and femoral veins and femoral artery. Blood flows were measured by infusing a 1.5% solution of para-aminohippurate into the mesenteric vein at .764 ml/min. Net fluxes of metabolites were calculated by multiplying veno-arterial differences by tissue blood flows.

Study 1. Twenty experiments were conducted on five ewes to determine the effects of fungus-infested fescue hay on energy nutrients and regulatory hormone net fluxes. Ten experiments were conducted for each a fungus-free and fungus-infested fescue hay diet. Fungus-infested hay decreased arterial concentrations of acetoacetate and B­ hydroxybutyrate by 15 and …

A Mathematical Model Of Forage-Based Post-Weaning Growth Of Beef Cattle, David Glenn Keltner

Doctoral Dissertations

Four three-year experiments were conducted using 1. 2 ha pastures to evaluate the productivity of various forage species combinations and the performance of stocker steers grazing them. Forage systems used were (1) Common bermudagrass (Cynodon dactylon L. var. dactylon) + 112 or 224 kg N/ [CB] ; (2) Common bermudagrass overseeded with high endophyte (Acremonium coenophialum Morgan-Jones & Gams) tall fescue (Festuca arundinacea Schreb.), ladino clover (Trifolium repens L.) and Kobe lespedeza (Lespedeza striata (Thunb.) H & A) [CB + HF + LEG]; (3) HF + 67 kg N/ha [HF]; (4) HF + LEG; (5) Low endophyte …

Distribution Of The Fishes Of The Great Smoky Mountains National Park, Damien J. Simbeck

Masters Theses

Over 200 collections of fishes have been made within the boundaries of the Great Smoky Mountains National Park, revealing a Park ichthyofauna of 74 native and 5 introduced fish species. Abrams Creek, containing the most diverse ichthyofauna in the park, currently contains only 35 of its historical 67 fish species. This loss of species resulted from intentional poisoning of eh creek to improve habitat for rainbow trout and impoundment of the lowest 2.6 miles by Chilhowee Reservoir.

Abrams Creek also contains a very unusual ichthyofauna in its upper portion. Several species found above its 25-foot waterfall have not been found …

The Life History Of The Flame Chub, Hemitremia Flammea (Jordan And Gilbert), In Pond Creek, Loudon County, Tennessee, Marcia K. Sossamon

Masters Theses

Life history data were obtained from 243 preserved specimens of the flame chub, Hemitremia flammea, collected from June 1989 to June 1990 at Pond Creek in Loudon County, Tennessee. Flame chubs had a life expectancy of 1.5 years, and some individual reached 2 years. Length-weight relationships showed that as the length of the flame chubs increased, their weight did not increase as much as most other fish. During the spawning season, females averaged larger than males and outnumbered them. Flame chubs spawned between January and June, peaking in March. Fecundity generally increased as the total length of the female …

The Reproductive Biology, Winter Dormancy And Denning Physiology Of Black Bears In Great Smoky Mountains National Park, Stephen Anthony Pozzanghera

Masters Theses

Black bear reproduction, winter dormancy and denning physiology were studied during June 1984 to May 1986 in the northwest quadrant of Great Smoky Mountains National Park, Tennessee. Information was obtained from 30 individual females captured 35 times. Additional information on mast indices, lactation and den utilization were summarized from within the study area for the period from 1978-1988.

Breakaway collar retention varied significantly between years (1984, N=10, X=394 days vs. 1985, N=5, X=196 days, P<0.05).

Maximum production potential indices calculated for white, red and all oaks for 1984 and 1985 were 8.74, 19.99, 15.52%, and 35.06, 37.73, 36.45%, respectively. Regression …

Portal-Drained Viscera, Hepatic And Lower Hindquarter Net Flux Of Nitrogen And Energy Metabolites In Ruminants Fed Protein Supplements Containing Increasing Amounts Of Bound Nitrogen And Structural Carbohydrates, Byron Clark Housewright

Masters Theses

Fifteen experiments were conducted on nine mature, nonlactating, nonpregnant ewes to compare distillers dried grains with solubles (DDGS) to soybean meal (SBM) on both an energy and a protein basis. Ewes were equipped with chronic indwelling catheters in the caudal aorta and caudal vena cava, portal, hepatic and mesenteric veins. Ewes were assigned randomly to one of three isocaloric, isonitrogenous diets. Diets were corn cob based and balanced for energy with the addition of corn starch. Protein source for these diets was either SBM, DDGS or a combination of the two, mixed so that 50% of the protein was supplied …