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Articles 1 - 8 of 8
Full-Text Articles in Life Sciences
Differential Habituation Of Male Betta Splendens To Qualitatively Different Stimuli, Lauren Baard
Differential Habituation Of Male Betta Splendens To Qualitatively Different Stimuli, Lauren Baard
Undergraduate Research Symposium (UGRS)
Habituation is a learning mechanism that functions to decrease the amount of energy and attention focused on a certain stimuli. Male Siamese Fighting Fish, Betta splendens, are territorial animals that defend their territories using a number of aggressive displays. Male Bettas have previously shown the ability to habituate to the presence of a conspecific male when visually exposed to each other. Due to the costly nature of many of the male Betta’s displays, I hypothesized that male Bettas should differentially habituate to qualitatively different stimuli. I presented each of three groups of male Betta splendens with a different stimulus, each …
The Isolation And Characterization Of Multiply Antibiotic Resistant Strains Of Fish Pathogenic Flavobacterium Species, Sarah E. Clark, Jaehee Yun, Justin Guay
The Isolation And Characterization Of Multiply Antibiotic Resistant Strains Of Fish Pathogenic Flavobacterium Species, Sarah E. Clark, Jaehee Yun, Justin Guay
Undergraduate Research Symposium (UGRS)
Since the development of the first antibiotics in the 1940’s, there has been widespread overuse in both clinical and agricultural applications. Antibiotic resistance has become a significant problem as a result of subsequent dissemination of antibiotics into the environment, and multiply-resistant strains of bacteria are now a major pathogenic threat. In this study eight separate strains of Flavobacterium responsible for recent disease outbreaks in fish hatcheries throughout Maine were collected and analyzed. All eight strains were found to be resistant to high levels of a number of different antibiotics, including those used for aquaculture as well as human chemotherapeutic applications. …
Climate Change And Its Effects On Polar Bears, Alex C. Jospe, Bethany C. Peck, Emily Sinnott
Climate Change And Its Effects On Polar Bears, Alex C. Jospe, Bethany C. Peck, Emily Sinnott
Undergraduate Research Symposium (UGRS)
Polar bears are key indicators of the effects of climate change on the arctic ecosystem, because their existence is directly related to the sea ice habitat, where they hunt. As the Arctic continues to warm, their habitat will be reduced further and local extinction is likely to occur, especially in southern populations.
Variation In Beach Profile And Sediment Characteristics At Popham Beach, Phippsburg, Me, Kathryn Lidington
Variation In Beach Profile And Sediment Characteristics At Popham Beach, Phippsburg, Me, Kathryn Lidington
Undergraduate Research Symposium (UGRS)
No abstract provided.
The Impact Of Land Use Patterns And Watershed Characteristics On China Lake, Kennebec County, Maine, Rachel N. Carr, Caroline A. Polgar, Jakob B. Moe, F. Russell Cole, David H. Firmage, Kirsten L. Ness
The Impact Of Land Use Patterns And Watershed Characteristics On China Lake, Kennebec County, Maine, Rachel N. Carr, Caroline A. Polgar, Jakob B. Moe, F. Russell Cole, David H. Firmage, Kirsten L. Ness
Undergraduate Research Symposium (UGRS)
China Lake is located in Kennebec County, Maine. Since 1983 the lake has suffered from yearly algal blooms as a result of the addition of excess nutrients. The nutrient load was amplified by erosion within the watershed. Erosion varies widely depending on a number of factors, including the slope of the land, the type of soil, and the way the land is being used. Certain land use types have a high potential to add nutrients to the environment, while others may help absorb excess nutrients and prevent erosion and runoff into the lake. A comprehensive examination of the China Lake …
Man-Made Menopause, Madeline Horwitz
Man-Made Menopause, Madeline Horwitz
Undergraduate Research Symposium (UGRS)
In this study I suggest that there are three distinct time periods mark new developments in society’s understanding of menopause, Victorian America in the mid and late nineteenth century, mid-twentieth century America, and contemporary America. This is the case not only in terms of advances in biological science, but also the ways in which the medical establishment has viewed menopause has also changed, and in terms of changes in prevalent gender assumptions. In this paper I hope to expose the ways science, history, and society has medicalized menopause, and the ways in which menopause has been viewed by individual women, …
Resistance Of Forest Community Types To Structural And Compositional Change Following Beech Bark Disease Infestation, Sarah Ann Hoskinson
Resistance Of Forest Community Types To Structural And Compositional Change Following Beech Bark Disease Infestation, Sarah Ann Hoskinson
Honors Theses
Pathogens change forest composition and structure by selectively eliminating susceptible individuals and species. Caused by a complex between an exotic scale insect and fungi, beech bark disease has infected mature American beech (Fagus grandifolia) trees through most of the species range. Before succumbing to the disease, infected trees generate root sprouts, transforming beech from a dominant canopy species into an abundant subcanopy species. Root sprouting can create dense beech thickets that interfere with the regeneration of other species. Exclusion of species from the understory has ecological and economic implications. This study compared forest community types for their resistance to compositional …
A Broad-Spectrum Mer Operon In A Multi-Drug Resistant Strain Of The Fish Pathogen, Aeromonas Salmonicida, Erin Parry
A Broad-Spectrum Mer Operon In A Multi-Drug Resistant Strain Of The Fish Pathogen, Aeromonas Salmonicida, Erin Parry
Honors Theses
Aeromonas salmonicida AS03, a potential fish pathogen, was isolated from Atlantic salmon, Salmo salar, in 2003. This strain was found to be resistant to ≥1000 mM HgCl2 and ≥32 mM phenylmercuric acetate as well as multiple antimicrobials. Mercury (Hg) and antibiotic resistance genes are often located on the same mobile genetic elements, so the genetic determinants of both resistances and the possibility of horizontal gene transfer were examined. Specific PCR primers were used to amplify and sequence distinctive regions of the mer operon. A. salmonicida AS03 was found to have a pDU1358-like broad-spectrum mer operon, containing merB as well as …