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Effects Of Anthropogenic Noise On Body Mass In Gryllodes Sigillatus, Jessica L. Venturi, Joyce Zheng
Effects Of Anthropogenic Noise On Body Mass In Gryllodes Sigillatus, Jessica L. Venturi, Joyce Zheng
Butler Journal of Undergraduate Research
Insects use vibrational structures to produce and sense airborne sounds in intraspecific communication. These signals are important in courtship as well as defensive behavior against predators. For example, insects can detect the presence of nearby predators using vibrations. With an increase in anthropogenic activity, processing these signals and the constant threat they represent may increase stress on insects, subsequently affecting their behavior and physiology. Our experiment was designed to determine whether anthropogenic noise, possibly perceived as a stressor, will decrease the body mass of banded crickets, Gryllodes sigillatus. We predicted that the anthropogenic noise would stress the crickets, leading to …
Prenatal Stress And Birth Weight: Evidence From The Egyptian Revolution, Ronia A. Hawash
Prenatal Stress And Birth Weight: Evidence From The Egyptian Revolution, Ronia A. Hawash
Scholarship and Professional Work - Business
The Egyptian Revolution that ignited in January 2011 resulted in intense violent conflict between protestors and former regime allies. This generated a significant amount of fear and stress among people who lived in proximity to such events. We use this exogenous shock as a natural experiment to test the causal relationship between prenatal stress and birth weight. Governorate-level fatalities resulting from this conflict will be used as an exogenous indicator for prenatal stress. Using fixed effects and difference-in-difference analysis, results show that higher prenatal stress resulting from political conflict during the first and second trimesters of pregnancy has a …