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 10 of 10 for “"Growing degree day"”.
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Impacts of Driving Factors on Annual Cicada Emergence in Relation to the Seasonal Abundance of Eastern Copperheads (Agkistrodon contortrix)
… precipitation, moon phase, photoperiod, and growing-degree days) in connection with the timing of copperhead movement and cicada emergence. Nightly visual encounter surveys were conducted to determine copperhead and cicada relative abundances while observing behavioral interactions. Climatic …
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Influence of environmental conditions on the age, hatch dates, and growth of juvenile Atlantic menhaden in the Choptank River, MD
… carried over to juvenile growth rates. A growing degree-day model performed well in simulating observed juvenile growth rates in the Choptank River tributary of Chesapeake Bay.
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Biology and ecology of bigheaded carp in an invaded ecosystem
… from their native ranges and was dependent on growing degree day rather than changes in river discharge. Hybrid bigheaded carp (silver x bighead carp) were not different from silver carp in any of the characteristics examined (i.e., movements, condition, diet) but are increasingly represented …
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Epidemiology and molecular characterization of human and canine hookworm
… two risk models were developed based on the Growing Degree Day-Water Budget (GDD-WB) concept, one based on accumulation of monthly temperatures above a base temperature of 15oC and threshold WB value >0.4. The second was based on a ‘gradient index’ of the product of monthly accumulated GDD …
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Ecological risk models for visceral leishmaniais [sic] in Bahia, Brazil and diagnosis of Trypanosoma cruzi infection in dogs in south central Louisiana
… Algorithm for Rule-Set Prediction (GARP) and the growing degree day-water budget (GDD-WB) concept to predict the distribution and potential risk of visceral leishmaniasis (VL) in the State of Bahia, Brazil. The objective was to define the environmental suitability of the disease as well as to …
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Effect of planting date on measured growth intervals for a set of genetically diverse maize hybrids
… is known to affect the thermal and calendar day requirements of corn hybrids. There are conflicting reports in the literature as to whether the thermal intervals to certain growth stages are increased or decreased by delayed planting. A study of 12 maize hybrids was conducted in 1994 and …
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Atlantic sturgeon growth responses to dual seasonal spawning, latitudinal thermal regimes, and Chesapeake Bay environmental stressors
… of Atlantic sturgeon was evaluated. Finally, a growing-degree-day (GDD) model was developed to evaluate the phenology of spawning and early growth across latitudinally distributed Atlantic sturgeon populations, some of which exhibit dual seasonal spawning. Lethal levels of nitrite observed in …
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Using Thermal Units to Predict Biomass Accumulation and Total Nitrogen Uptake for Cover Crops in Arkansas
… crops growth can be predicted using thermal days or growing degree days [GDD] similar to commodity crops such as corn (Zea mays L.) or rice (Oryza sativa). Growing degree day calculations are a well-known tool to predict crop growth stage or development stage and can be adapted for use in any …
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Land Surface Phenologies and Seasonalities Using Cool Earthlight in Temperate and Tropical Croplands
<p>In today’s world of increasing food insecurity due to more frequent and extreme events (droughts, floods), a comprehensive understanding of global cropland dynamics is critically needed. Land surface parameters derived from the passive microwave Advanced Microwave Scanning Radiometer on EOS …
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Mitigating risk of weather variability to agriculture through improved field workability predictions
… the field to be in a workable state. These days for which the field is workable are called field working days (FWDs), and are driven by soil moisture and temperature. Over a certain threshold of soil moisture or below a certain temperature threshold, a field is considered unworkable. Working …