John Carroll University

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    DIFFERENTIAL TAIL AUTOTOMY BETWEEN TWO GENETIC CLADES OF A WOODLAND SALAMANDER, PLETHODON CINEREUS

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    Following the retreat of glaciers in North America, a wide diversity of organisms rapidly migrated into previously uninhabited regions, including animals with limited dispersal abilities such as amphibians. I wanted to better understand the strategies that salamanders use to aid in their dispersal abilities and to understand if patterns of post-glacial range expansion affect phenotypic traits such as anti-predator strategies. In this study, I used existing phylogeographic evidence of clade membership as a framework to examine whether red-backed salamanders (Plethodon cinereus) differed in tail autotomy behavior at the range edge versus the range core, and across the geographic range of two clades; one of limited range (the Ohio Clade) and one that has dispersed north along the Atlantic coast into Canada, westward, and south into Michigan and Indiana (the Northern Clade). I hypothesized that salamanders belonging to the Northern Clade and salamanders belonging to range-edge groups would exhibit high tail autotomy frequencies and a greater degree of antipredator postautotomy characteristics. I conducted lab experiments and used museum specimens to examine tail autotomy frequencies and other tail autotomy characteristics, including latency to autotomize under predation pressure, duration of tail movement following autotomy, postautotomy tail movement undulations, and tail regrowth. In my lab experiments, I found significantly higher tail autotomy frequencies within range-core populations and significantly greater postautotomy tail movement duration in my sampled populations from the Northern Clade. Further, I found significantly greater frequencies of autotomy in the Northern Clade in my museum specimen analysis. Therefore, I conclude that Plethodon cinereus exhibits geographic variation in tail autotomy frequencies, although the observed patterns of tail autotomy in this study did not align with my initial hypotheses and instead appear to be influenced by several other unidentified variables

    Effects of Unorthodox CEO Behaviors

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    By investigating erratic activities performed by CEO Elon Musk, we want to examine the relationship between unorthodox CEO activities and the effects that these activities have on the company internally. We want to know how these actions affect employees, which would then impact the financial performance of said companies. While there are numerous examples of Musk saying and doing crazy things, we primarily focused on his involvement in the rise of Dogecoin. This case study serves as an excellent example of Musk’s odd behavior as CEO by continuously influencing the price of a cryptocurrency that is not backed by any assets. The price is strictly based on what people are willing to pay for it, and Musk took advantage of this by using his platform to bring popularity to it. These actions occurred independently of his duties as CEO, but his title immediately connects his actions with his companies. Weird actions like this are very uncommon for most CEO’s, but it is one of the many ways that Musk acts differently than a typical CEO. While his actions are independent of the companies he manages, they ultimately are linked back to the companies, which then impacts them financially. A significant amount of attention was drawn to Musk and his companies, making them volatile in the short run

    Assignment: ‘How Will Climate Change Affect My Career?’

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    To encourage our students to reflect on the impact of climate change on their future careers, and then to manage their resulting sober and conflicted emotions, we have created an assignment we call “How Will Climate Change Impact My Career?” We teach two courses: Dr. Jeffrey Johansen and Dr. Ruth Jacob teach an introductory-level course in Biology on the science of climate change, and Dr. Debra J. Rosenthal teaches an introductory literature course on climate-change fiction (cli-fi). These Biology and English courses are linked together; students must co-enroll in both three-credit courses. Through our linked pair of courses, students engage in a six-hour-a-week interdisciplinary immersion into the actual mechanisms of global climate change in the United States and how American poets and fiction writers portray climate catastrophe in their writing. We hope the assignment makes students aware of the implications of climate change locally as well as globally

    ORIGINAL SETTLEMENT, NATIONAL ORIGINS, AND THE PARTY SYSTEM IN OHIO

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    PUBLIC SECTOR LIABILITY AND BUDGETING I OHIO

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    ENTREPRENEURSHIP AND CLASSICAL ECONOMICS: ADAM SMITH AND HIS UNDERTAKER

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    RELIGION AND DEMOCRACY IN CONTEMPORARY IRAN AND THE UNITED ST A TES

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    AN ECONOMETRIC MODEL OF EXCHANGE RATE BUBBLES

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    CONSTITUTIONAL CHANGE AND U.S.-CANADIAN RELATIONS

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