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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 309 for “"Seasonal variation"”.
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Seasonal Variation in Desert Tortoise Immune Function
… this species is necessary. We analyzed minimal seasonal fluctuations in innate immune function and white blood cell numbers in a colony of captive, healthy tortoises. Bacteriocidal assays measured the ability of constitutive natural antibodies and complement proteins to kill a standard strain of …
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Seasonal Variation in Benthic Community Structure in Mobile Bay, Alabama.
The community concept in benthic marine ecology has long been a subject of intense interest. Peterson (1918) was one of the first investigators to recognize and attempt to characterize benthic com- munities in his extensive surveys of the Skagerrak and Baltic Sea. According to Thorson (1957), …
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On the detection of seasonal variation in the onset of disease
Many studies have investigated the seasonality of onset of diseases over the calendar year, with a view to finding indications of their aetiology. This thesis studies statistical methodology for seasonality which can be summarised by a single peak or multiple peaks determined by patient …
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Seasonal Variation in the Hematological Pattern of the Leopard Frog, Ranapipiens
Made available in DSpace on 2014-12-11T22:22:13Z (GMT). No. of bitstreams: 1 7206945.pdf: 13072032 bytes, checksum: 251ac91ab255c1dca4f055e5e13c3df6 (MD5) Previous issue date: 1971
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Seasonal variation and spatial organization of hydrologic fluxes over complex topography
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1995.
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Seasonal Variation of Mud Floc Sizes in Two Small Freshwater Streams
… pH) and to compare how that relationship varies seasonally and spatially across two streams in the same watershed with a similar drainage area but different land uses within these areas. Microscopic images of flocs and water samples were taken within two local streams every two to four weeks …
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Seasonal Variation in Whole Stream Metabolism across Varying Land Use Types
… The purpose of my study was to understand the seasonal changes in metabolism within and among streams as well as the impacts of different land use. This was addressed by monitoring nine different watersheds in the Little Tennessee River watershed in southwestern North Carolina. The nine study …
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Seasonal variation in fitness levels of professional youth footballers over a competitive season
… Therefore, the current study considered the seasonal variation in fitness parameters of footballers over the course of a professional season. Nineteen professional youth players from Celtic Football Club (age = 18.2 + 0.3 years; height = 175.4 + 6.2 cm; weight = 66.8 + 2.56 kg) completed …
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Seasonal variation in the reproductive biology of the ring -billed gull (Larus delawarensis)
… fledging success with date of clutch initiation. Seasonal changes in mean clutch size, hatching success and fledging success also resulted in early clutches, initiated at the peak of clutch starts, producing more chicks per nest (2.34 ± 0.11) than either pre-peak (2.13 ± 0.20) or post-peak (1.82 ± …
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Taxonomic and Seasonal Variation Among Extant Hyracoids Based on Dental Microwear Texture Analysis
… original claim made by Walker et al. (1978) that seasonality differentiates the dietary patterns for <em>Procavia</em> but not italic>Heterohyrax, which suggests species and season may in fact be signals for dietary variation. A larger sample number for species by season and a better control in …
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Temperature acclimation in the channel catfish, Ictalurus punctatus: Seasonal variation and cellular mechanisms
Seasonal variations were seen in liver composition and activities of liver enzymes of channel catfish acclimated to $7\sp\circ\rm C,$ $15\sp\circ\rm C,$ or $25\sp\circ\rm C.$ Fall and winter catfish exhibited positive acclimation for total liver protein and DNA, hepatosomatic index, and activity of …
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Seasonal Variation in the Energy Balance of the Tree Sparrow in Relation to Migration
Made available in DSpace on 2014-12-04T22:46:09Z (GMT). No. of bitstreams: 1 5900600.pdf: 2442547 bytes, checksum: 872818b325d2fc4ae4fca24c3a73a3d2 (MD5) Previous issue date: 1958
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Sex and seasonal variation in hippocampal volume and neurogenesis in the eastern chipmunk, Tamias striatus
… been found to differ between the sexes and vary seasonally in tandem with spatial behaviours such as food-caching and mating. However, few studies have simultaneously compared across sex and season, and the literature contains inconsistencies. The present study examined sex and seasonal …
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Metagenomic analysis of the biodiversity and seasonal variation in the meromictic Antarctic lake, Ace Lake
… roles in nutrient cycling. In this thesis, the seasonal changes in Ace Lake microbial community were studied using a time-series of metagenomes utilizing the Cavlab metagenome analysis pipeline. Statistical analyses of taxa abundance and environmental factors revealed the effects of the polar …
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Isokinetic muscular strength and performance in youth football : relationships with age, seasonal variation and injury
… footballers, and the relationships with age, seasonal variation and injury. A secondary aim was to use the information gathered to target muscle strain injury prevention strategies to particular age groups and times, and evaluate the effect.The primary aim was achieved by establishing …
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Intraspecific, Interspecific, and Seasonal Variation in Acclimation of Photosynthesis to Rising Atmospheric Carbon Dioxide Concentration
… acclimation of photosynthesis to elevated [CO2]. Variation in acclimation was addressed using meta-analytical techniques and three open-air CO 2 experiments: a Free Air CO2 Enrichment (FACE) experiment with Glycine max (SoyFACE); a FACE experiment with Lolium perenne, a temperate grassland species …
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Circadian and Seasonal Variation in Pasture Nonstructural Carbohydrates and the Physiological Response of Grazing Horses
… in pasture forages, undergo circadian and seasonal variation which has direct effects on metabolism in grazing horses. Increased intake of NSC is implicated in the development of digestive and metabolic disorders, such as laminitis. A series of five studies at Virginia Tech's M.A.R.E. …
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Seasonal Variation in Corticosterone, Stress Responses, and Physiology in the Northern Cardinal <i>Cardinalis cardinalis</i>
<p>Seasonal regulation of the adrenocortical response (e.g., ‘stress response’) appears to be ubiquitous in mid- to high-latitude vertebrates. Northern Cardinals (Cardinalis cardinalis) are a Temperate dwelling passerine of Tropical-descent with a wide species range (tropics to Northern Temperate …
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Prevalence and seasonal variation of severe childhood protein calorie malnutrition in Khartoum : implication for brain function
… which examined three main areas: prevalence and seasonal variation, influencing demographic factors and impact on brain function with use of electroencephalogram (EEG) assessment before and after clinical and nutritional interventions. All 466 children admitted to the Khartoum Teaching Hospital …
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