Theses and Dissertations
This collection includes both ASU Theses and Dissertations, submitted by graduate students, and the Barrett, Honors College theses submitted by undergraduate students.
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- Creators: School of Life Sciences
Description
This thesis aims to address the ethics of keeping the big cats, such as lions, tigers, and leopards, in zoos. It is a practice that has generated some controversy in light of scientific studies reporting stress among wide-ranging animals in captive enclosures, as well as in the context of wider discussions in animal welfare and conservation ethics in zoos. A driving question for this project, therefore, was "What are the arguments for and against keeping large felids in zoos/captivity?" This thesis examines the historical and current ethical approaches to evaluating the ethics of maintaining big cats in zoos. Due to many of the big cat species listed as endangered species on the IUCN redlist, the species-centered approach to zoo ethics is becoming the common viewpoint, and, as a result, zoos are deemed ethical because of their contribution to ex situ conservation practices. Further, the ethical arguments against zoos are minimized when the zoos provide suitable and appropriate enclosures for their large felids. Of course, not all zoos are created equal; the ethics of zoos need to be evaluated on a case-by-case basis, but in general, it is ethical to maintain big cats in zoos.
ContributorsZeien, Krista Marie (Author) / Minteer, Ben (Thesis director) / Smith, Andrew (Committee member) / Ellison, Karin (Committee member) / Barrett, The Honors College (Contributor) / Department of Chemistry and Biochemistry (Contributor) / School of Life Sciences (Contributor)
Created2014-05
Description
Consumption of seafood poses a substantial threat to global biodiversity. Chemical contamination found in both wild-caught and farmed seafood also presents significant health risks to consumers. Flame retardants, used in upholstery, plastics, clothing, and other products to reduce fire danger, are of particular concern as they are commonly found in the marine environment and permeate the tissues of fish that are sold for consumption via multiple pathways. By summarizing various metrics of sustainability and the mercury content in consumed species of fish and shellfish, researchers have found that high levels of chemical contamination was linked with lesser fishery sustainability. I conducted a literature review of flame retardant content in seafood to further compare contamination and sustainability in addition to the initial analysis with mercury. My review suggests that the widespread issue of fishery collapse could be alleviated by demonstrating to stakeholders that many unsustainable fish stocks are mutually disadvantageous for both human consumers and the environment. Future research should address the need for the collection of data that better represent actual global contaminant concentrations in seafood.
ContributorsNoziglia, Andrea Joyce (Author) / Gerber, Leah (Thesis director) / Smith, Andrew (Committee member) / Pratt, Stephen (Committee member) / Barrett, The Honors College (Contributor) / Herberger Institute for Design and the Arts (Contributor) / School of International Letters and Cultures (Contributor) / School of Life Sciences (Contributor)
Created2014-05
Description
Protein is an essential macronutrient in the human diet, but the source of this protein has both human health and environmental impacts. Health complications can result from protein deficiency, but the practices by which protein sources are raised, grown, or harvested have environmental consequences, potentially reducing biodiversity, essential habitat, and crucial stocks of natural resources. Terrestrial cultivation encroaches on natural habitats and consumes resources inefficiently, while overfishing has greatly depleted wild fishery stocks. These environmental factors, along with concerns about nutrients, contaminants and the ethics of animal protein has led to confusion about weighing the risks and benefits associated with alternative sources of protein. Providing consumers \u2014 and policy makers \u2014 with a comprehensive account of major protein sources and their impacts in an understandable form is crucial to reducing environmental degradation and improving human health. Here I provide a general framework to compare the health and environmental impacts of livestock, seafood, and plant protein, and illustrate the application of this framework with case studies for each of these categories.
ContributorsGeren, Sarah Lindsey (Author) / Gerber, Leah (Thesis director) / Smith, Andrew (Committee member) / Minteer, Ben (Committee member) / Barrett, The Honors College (Contributor) / School of Human Evolution and Social Change (Contributor) / School of Life Sciences (Contributor)
Created2014-05
Description
Bottlenose dolphins, or Tursiops truncates, have captured the attention of humans for centuries leading people to keep them in captivity. However, people's love and an increase in knowledge for these creatures have sparked many ethical debates on whether dolphins should be kept in captivity. In this paper, I discuss the different dimensions of bottlenose dolphin captivity focusing on the physiological, psychological, ecological and ethical concerns raised when comparing captive to wild bottlenose dolphins. In an analysis of the scientific literature, I found that captive bottlenose dolphins experience negative physical and psychological effects, including a shorter life span and a decrease in brain size. They also engage in more risky and harmful behaviors. Preexisting brain structures in bottlenose dolphins indicate enhanced emotional processing possibly leading to a more difficult life in captivity. Furthermore, modeling of bottlenose dolphin social networks have found that removal of dolphins from existing populations have negative repercussions for ecological communities, particularly effecting present and future pods due to their complex social systems called fission fusion societies. Furthermore, removal can have a deleterious effect on the environment due to their role as top predators. Available data suggest that bottlenose dolphins should be classified as non-human persons due to their cognitive abilities such as self-awareness, intentionality, creativity, and symbolic communication. This moral classification demands significant human duties and responsibilities to protect these cetaceans. Due to their similarities to humans, these results suggest that keeping bottlenose dolphins in captivity is ethically questionable and perhaps unjustifiable as captivity violates their basic rights.
ContributorsCoonrod, Sarah Mae (Author) / Gerber, Leah (Thesis director) / Smith, Andrew (Committee member) / Minteer, Ben (Committee member) / Department of Psychology (Contributor) / School of Life Sciences (Contributor) / Barrett, The Honors College (Contributor)
Created2017-05
Description
With the overall health of the environment rapidly declining \u2014 mostly due to human behaviors, solving the problem of nature deficit disorder and getting more children interested and aware of nature could be paramount to improving the environmental health of our planet. In this study, the relationship between children's learning and emotion is explored. Pre- and post-tests were given to children attending a week-long summer freshwater ecology camp; their knowledge of and emotional connection to different ecological concepts were measured. Two separate ecosystems were tested \u2014 a freshwater ecosystem that was taught over the course of the week, and a marine ecosystem for comparison. Increases in knowledge and emotion were seen in every freshwater ecosystem concept. Additionally, the knowledge and emotion scores were correlated, suggesting a positive relationship between them. The marine ecosystem did not show improvements in concrete knowledge, but showed increases in abstract learning, indicating that the abstract concepts learned about the freshwater ecosystem were able to transfer to the marine. Overall results show the ability of a hands-on learning experience to foster an emotional connection between a child and the subject matter. However, long-term studies are needed to track the relationship between children and their knowledge of and emotional connection to the subject matter.
ContributorsMossler, Max Vaughn (Author) / Pearson, David (Thesis director) / Smith, Andrew (Committee member) / Berkowitz, Alan (Committee member) / Barrett, The Honors College (Contributor) / School of Sustainability (Contributor) / School of Life Sciences (Contributor)
Created2013-05