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 45 for “"graze"”.
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Studies of grazing and nursing behavior in Angus crossbred cattle
… her grazing time. Calves of maternal (+) cows grazed longer than calves of maternal (-) cows (P< 0.10), and their grazing time was not affected by the growth genotype of their dams. In year 1, US-sired calves spent 3% more time grazing than NZ-sired calves; whereas in year 2, NZ-sired calves …
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Evaluation of the Persistence of Grazing Alfalfa Varieties
… by dairy cows. The varieties, Southern States Graze King, WL 324, Garst 645 II, WL 325 HQ, ABT 405, and Spredor III were established March 29, 2000 and harvested three times for hay throughout the year. Grazing was begun in April 2001 and ended in September 2001. Each plot was grazed when …
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Effects of an herbicide on a planktonic food web
… and Keratella cochlearis, were reported to graze exclusively on cells <9 um. Polyarthra vulgaris and Synchaeta pectinata also graze in this size range but are not limited to it. Copepod nauplii/copepodids were present, but adult copepods and cladocerans were rare. The tintinnid ciliate …
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Lamb performance, behavior, and body temperatures in hardwood silvopasture systems
… 0.0202). Lambs in the black walnut silvopastures grazed more (488 ± 14 minutes · day⁻¹ ) than lambs in the honeylocust silvopastures (438 ± 15 minutes · day⁻¹ ; P = 0.0192) and the open pastures (417 ± 14 minutes · day⁻¹ ; P = 0.0009), with no difference between the latter two systems (P = …
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Equine proximal phalanx bone properties during growth
… is the quadrant most loaded when young horses graze. The data presented provides a benchmark of normal growth trajectories that can be used to evaluate the effect of training regimens during growth.
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The role of heterotrophic microflagellates in plankton communities
… were also investigated for their ability to graze bacteria attached to particles. Bodo nanorensis and Rhynchomonas nasuta both showed a marked ability to graze attached bacteria and a limited ability to graze unattached cells. These results suggest that microflagellates may also be important …
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Scattering of an ultrasonic beam from a curved interface
… need be considered; the incident beam does not graze the interface. The incident beam is modeled as a two-dimensional wavefield whose initial profile is either Gaussian or rectangular. In both cases the aperture is assumed to be sufficiently large (in wavelengths) that a well collimated beam is …
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Investigating the habitat selection and dietary preferences of a largely sedentary population of blue wildebeest in the Kgalagadi Transfrontier Park – impacts of permanent surface water provision in a semi-arid environment
… arid environment the distribution of available graze has long been considered an important variable in determining the distribution of wildebeest. I further examine my results showing that forage availability and quality plays a key role in wildebeest habitat selection through a stable carbon …
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Snail grazing effects on the composition and metabolism of benthic diatom communities and subsequent effects on fish growth
… group in the containers were pennate diatoms. Grazed containers contained a larger percentage of the non-motile classes of diatoms, as compared to the motile forms which predominated in the untreated microcosms. The snails are able to selectively graze these mobile species. Their gut contents …
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A Study of Quantum Interference and Entanglement with Negative Optics
… both the transmitted and reflected waves to graze the scattering surface (α = β) thus synergistically reinforcing the diffractive process in a behavior reminiscent of critical internal reflection of ray optics.</p> <p>We experimentally demonstrate the concept with measurements on a …
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Estimation of the proportions of grass and legume in extrusa of esophageallly-fistulated animals
… esophageally-fistulated steers were allowed to graze in 20 4 X 4 m² plots of red clover and tall fescue after fasting overnight. The grass/legume proportions of the extrusas and the grab samples were extrapolated from slopes. The botanical composition of grab samples differed (P<.001) from that …
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Zooplankton phytoplankton interactions in the San Joaquin River, Ca
… methods to quantify the rates that zooplankton graze on algae populations in the SJR. Zooplankton grazing studies were performed in the DWSC of the SJR from June 2012 through July 2013. Light and dark bottle microcosm studies using the dilution method, the food-removal method, and the grazer …
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Biotic Responses on Typha-monodominant Semipermanent Wetlands To Cattle Grazing
… Ten yearling, crossbred steers were allowed to graze the plots for 28 days beginning 11 June 1984 at a rate of 3.73 ALM’s. Cattails and thallophytes were sampled during pretreatment and post treatment weeks of 1984 and 1985. Passerine birds, waterfowl, and aquatic invertebrates were sampled …
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An economic evaluation of the optimal ewe replacement policy for typical Canterbury light land and irrigated properties
… worn or missing teeth are considered unable to graze and therefore to produce satisfactorily. The study takes the following form; (1) review of the relevant literature, (2) survey of farmers running 'gummy' ewes, (3) trial work analysing production and management characteristics of 'broken …
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Veld condition indexing : relevance to wildlife management?
… by forage quality but also by ability to graze different grass heights, based on jaw morphology, and the risk of predation. The relationship between VCI and veld condition variables was found to be triangular due to the method of calculation causing the VCI to fold back on itself. This …
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Neltumius arizonensis (Schaeffer) (Coleoptera: Bruchidae) as a biological control agent of mesquite (Prosopis spp., Mimosaceae) in South Africa
… mesquite seeds annually, where livestock do not graze pods that are lying on the ground. Where pods are grazed, however, there is insufficient time for A. prosopis to inflict an adequate degree of seed damag'e before pods are eaten. For this reason another bruchid, Neltumius arizonensis …
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Where the desert ghost roams
… and water when the Sonoran Desert is too dry to graze. As it become s harder for the Sonoran pronghorn to escape increasingly inescapable human activity, it also become s harder for the recovery team to ensure the Sonoran pronghorn survives its estimated nearly one in four chance of being extinct …
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Marine Reserves Promote Coral Reef Resilience by Mitigating Human Impacts Through the Restoration of Parrotfish Populations, Increasing Their Reproductive Output and Seeding Neighboring Overfished Reefs
… the abundance of herbivorous fishes that can graze on algae, therefore directly or indirectly preventing coral to algal phase shifts. However, the ability of marine reserves to mitigate human impacts, restore herbivorous fish populations and seed nearby reefs is still poorly known.</p> <p>The …
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Bison Conservation in the Northern Great Plains
… bison) was the most numerous and influential grazer. However, by 1900 bison were reduced to ¡Ü 1,000 animals throughout North America. Today, bison are scattered throughout their historical range, numbering > 500,000 individuals. Recent questions have surfaced regarding the success of this …
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Bison Conservation in the Northern Great Plains
… bison) was the most numerous and influential grazer. However, by 1900 bison were reduced to ¡Ü 1,000 animals throughout North America. Today, bison are scattered throughout their historical range, numbering > 500,000 individuals. Recent questions have surfaced regarding the success of this …
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