Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"forage availability"”.
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The Virginia Beef Cattle Simulation Model: A bio-economic simulation program modeling the interactions among reproduction, forage availability, nutrition, growth, and marketing in beef cattle
… Its five source-code modules are reproduction, forage, nutrition, marketing, and a tool that randomly assigns values to variables from appropriate statistical distributions. The VBCSM contains production statistics for 12 breeds, 21 forage species, and three Virginia agro-ecological zones. It …
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Linking Cattle, Forage, and Tree Production in Silvopastures
… is the intentional integration of trees with forages and livestock. In Blackstone, Virginia a silvopasture management plan was created in a thinned, timber stand seeded with a cool-season forage mixture. Treatment pastures for this study included an open pasture, a thinned pine silvopasture, a …
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Lamb performance, behavior, and body temperatures in hardwood silvopasture systems
Trees in silvopastures may provide forage-livestock systems with multiple goods and services, including shade, shelter, and browse. Reports of forage and animal productivity from these systems indicate that, in some cases, animal gains are similar or better despite lower forage yield. The …
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The effects of environmental factors on honey bee morbidity
… honey bee morbidity. Second, I examine if forage availability and weather affect honey bee health. Third, I provide a demonstration of how the biological modeling of environmental factor effects on honey bee health can be used by beekeepers to make cost-effective treatment decisions. I take …
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Short-term effects of wildfire on Sierra Nevada bighorn sheep habitat ecology
… We hypothesized that wildfire would change both forage availability and predation risk. Green forage biomass on Sierra bighorn winter ranges rebounded quickly from wildfire. Within 2 years green forage biomass was equal in burned and unburned areas, although total forage biomass was greater in …
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Short-term effects of wildfire on Sierra Nevada bighorn sheep habitat ecology
… We hypothesized that wildfire would change both forage availability and predation risk. Green forage biomass on Sierra bighorn winter ranges rebounded quickly from wildfire. Within 2 years green forage biomass was equal in burned and unburned areas, although total forage biomass was greater in …
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Documentation of Missouri white-tailed deer chronoclines : implications for archaeology, paleoecology, and conservation biology
… to modern times in Missouri white-tailed deer. Forage availability and intraspecific competition were the major influences on body size. A diminution event occurred [about]1600-1300 radiocarbon years B.P. and is associated with fluctuating climatic conditions at the time. Modern deer in Missouri …
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Estimating forage yields with simple methods
Forage availability has strong influences on pasture and animal performance. The assessment of herbage yield is an important aim for the management of pastures and animals in systems, concurrently. Four shortcut methods of estimating pasture yield and one method of estimating botanical composition …
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Effects of Seasonal Burns on Avian Foraging in a Central Texas Ashe Juniper-Live Oak Savanna
… if this shift in burn season affects avian forage availability, I examined avian species foraging on summer, fall and winter burns plus unburned control plots over a year. I found no difference in forage use by avian species on seasonal burn treatments; however, there was a significant …
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Can Beef Be Bee-Friendly? Using Native Warm-Season Grasses and Wildflowers in Pastures to Conserve Bees
… the eastern U.S. rely primarily on cool-season forages that peak in biomass production in late spring, leading to a lack of forage in the summer months and increasing the costs of cattle production. Seeding pastures with a mix of native warm-season grasses and native wildflowers could increase …
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Understanding the complex relationships between climate, vegetation, and foraging behavior of a climate-sensitive alpine mammal in order to explain patterns of persistence
… but understanding the links between climate, forage quality, and foraging behavior is necessary to identify the mediating mechanism. Pika foraging pressure help shape the local plant community, which can confound modeling efforts and must be considered when evaluating the influence of …
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Management and nutritional quality of tall fescue and alfalfa grown in combination, compared to tall fescue fertilized with nitrogen
… replications. Quality and yield of stockpiled forages and performance and serum minerals of grazing steers were investigated during 1991-92 and 1992-93. Effects of grazing and timing of initiation of stockpiling forages were investigated during autumn of 1992. Rate and extent of release of Ca, …
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Effect of Scale on Habitat Selection of Female White-Tailed Deer in the Central Black Hills, South Dakota and Wyoming
… thermal cover in winter to compensate for poor forage availability. Preference by deer for areas with high productivity but with low coverage by forbs and shrubs suggested that competition by elk (Cervus elaphus) and cattle was important. Furthermore, deer apparently avoided areas of human …
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Forage Selection and Grouping Patterns of Male and Female Scimitar-horned Oryx (Oryx dammah) on Mason Mountain Wildlife Management Area, Mason, Texas
… and do not exhibit intersexual differences in forage selection. My study was initiated in June 2006 at Mason Mountain Wildlife Management Area in central Texas and data collection was completed in April 2007. I measured grouping patterns from systematic vehicle surveys conducted at dawn and …
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Growth, Survival, and Reproductive Success of Largemouth Bass Stocked with Selected Forage Fishes in South Dakota Ponds
… were evaluated to determine effects of forage availability and geographic location on largemouth bass (Micropterus salmoides) growth, survival, and reproductive success two and three years following stocking. Four forage species stocked with largemouth bass included bluegills (Lepomis …
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Human-black bear interactions in Missoula Montana
… the spatial distribution of HBI, and determine forage-related variables that predict use of the urban landscape by bears. Based upon questionnaires sent to a sample of residents in 2004 and 2008, the prevalence of outdoor garbage storage decreased, and support for management actions used to deal …
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Human-black bear interactions in Missoula Montana
… the spatial distribution of HBI, and determine forage-related variables that predict use of the urban landscape by bears. Based upon questionnaires sent to a sample of residents in 2004 and 2008, the prevalence of outdoor garbage storage decreased, and support for management actions used to deal …
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Effect of application of fluidized bed combustion residue to reclaimed mine pastures on forage yield, composition, animal performance and mineral status
… kg FBCR/ha, and 3380 kg limestone/ha. Based on forage availability, six steers were rotationally grazed on pastures receiving each treatment. Steers were weighed and blood samples collected at 14-d intervals and all animals were sacrificed for tissue sampling at the end of the 114-d trial. …
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Legume Establishment in Native Warm-Season Grass Pastures
… value of the stand, result in more consistent forage availability throughout the growing season, and increase forage yield. These benefits are often not realized due to difficulties in establishing legumes in existing NWSG stands. The objective of this study was to investigate the effect of …
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