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Full-Text Articles in Life Sciences
Predictors Of Testosterone In Male African Elephants (Loxodonta Africana), Kaitlyn Campbell
Predictors Of Testosterone In Male African Elephants (Loxodonta Africana), Kaitlyn Campbell
UNO Student Research and Creative Activity Fair
Male African elephant (Loxodonta africana) populations in zoos suffer from a range of reproductive complications. In particular, insufficient testosterone production can have a detrimental effect on spermatogenesis and fertility. Few studies have explored the potential social, environmental, physiological and physical factors that influence bull testosterone levels in a zoo environment. The present study will collect endocrine and metabolic information from weekly fecal and blood serum samples taken over the course of the six-month study period. Social and environmental data will be collected in a survey provided to the institutions. Results will highlight the key factors contributing to fluctuations in testosterone …
The Effects Of Trichloroethylene On The Germination And Early Development Of Radish, Butternut Squash, Corn, And Soybean, Sarah Jaksich
The Effects Of Trichloroethylene On The Germination And Early Development Of Radish, Butternut Squash, Corn, And Soybean, Sarah Jaksich
UNO Student Research and Creative Activity Fair
Trichloroethylene (TCE) is a small molecule used as a metal degreaser and as an extraction solvent for lipids. Historically, TCE has been used to clean missiles and rockets after testing at military sites. However, TCE has decreased in use due to its potential health hazards. TCE is particularly dangerous because it is soluble in water and easily seeps into ground water. As a result, TCE has contaminated groundwater in Mead, Nebraska. The town is near the formal Nebraska Ordnance Plant, a military factory specializing in bomb assembly, ammonium nitrate production, and explosives burning. Soil sampling in Mead indicated TCE levels …
Influence Of Cattle Grazing On Milkweed And Other Native Forbs, Karen Klug
Influence Of Cattle Grazing On Milkweed And Other Native Forbs, Karen Klug
UNO Student Research and Creative Activity Fair
One of the most identifiable plants of the Great Plains are milkweed species (Asclepias spp.), which are also the only food source for monarch butterfly caterpillars (Danaus plexippus). Conservation of the milkweed population has taken renewed importance as the population of eastern migratory monarchs has dropped by over 80% from 1996 to 2017, largely because of a loss of over 1.3 billion stems of milkweed. As a result of this monarch population decline, it has been petitioned to protect the monarch butterfly population under the US Endangered Species Act. To increase the population size of the …
Juvenile Hormone Mediation In An Insect With Parental Care Behavior, Jessica M. Rodino
Juvenile Hormone Mediation In An Insect With Parental Care Behavior, Jessica M. Rodino
UNO Student Research and Creative Activity Fair
Juvenile hormone (JH) is a well-known catalyst for hormonal processes in insects. However, the role of JH in insects that exhibit parental behavior is unknown. We investigated the influence of JH on parental behavior in the burying beetle (Nicrophorus orbicollis). In the first experiment, we manipulated the JH production of females via the administration of varying doses of fluvastatin sodium immediately following oviposition. We found that with increasing fluvastatin dosage, the total mass of offspring and number of offspring decreased while at the same time less of the food source was consumed. These results suggest a link between …