Matching Items (130)
Description
Following the implementation of federal immigration control measures in the 1990s, Arizona became the main point of entry for undocumented immigrants along the US border with Mexico in the early 2000s. Since then, reports have blamed human smuggling facilitators for the increase of undocumented immigration into the state and the apparent development of violent practices targeting the undocumented. However, little is known about the organization of the groups who work at facilitating the transit of undocumented immigrants along the US Mexico Border. Based on interviews and narratives present in legal files of smuggling cases prosecuted in Phoenix, Arizona, the present study provides an analysis of local human smuggling operations. It argues that far from being under the control of organized crime, smuggling is an income generating strategy of the poor that generates financial opportunities for community members in financial distress. The study, raises questions over smuggling's perceptions as violent and instead identifies smuggling-related violence as a reflection of the structural violence carried out by the state against immigrant communities through policing, surveillance and the consistent and systematic exercise of race-based policies.
ContributorsSanchez, Gabriella (Author) / Romero, Mary L (Thesis advisor) / Fonow, Mary Margaret (Committee member) / Tsuda, Takeyuki (Committee member) / Arizona State University (Publisher)
Created2011
Description
Masculinity has been increasingly recognized as a critical and relatively unexplored area of inquiry in anthropological gender studies. This project seeks to expand anthropological research on masculinity to contemporary American society. Using the case study of a male-centered popular new sport, Mixed Martial Arts (also known as cagefighting) this project integrates theories of embodiment and feminist perspectives to explore how masculinity and masculine hegemony are shaped, contested, and perpetuated in the United States. Using a multi-level framework this project explores: 1) How is masculinity experienced and expressed by Mixed Martial Arts fighters as a form of self-identity? How do their bodies play a role in constructing masculinity? 2) What are the pervasive forms of masculinity associated with Mixed Martial Arts (MMA)? Are they truly representative of the sport? 3) Can these pervasive forms of masculinity be seen as hegemonic? How would hegemony operate in relation to individual experience? Using multiple methods to capture multiple points of view was critical to thoroughly examining the complex notion of masculinity. This study employed participant observation, semi-structured interviews, focus groups, surveys, photo elicitation, and media content analysis, as each presented particular benefits and allowed for the development a more well-rounded understanding of masculinity within the realm of MMA. This study also situates the rise of MMA and its representations of masculinity within the greater perspective of contemporary American society. By doing so reveals how ideologies of prescribed masculinity do not arise out of a vacuum but in relation to particular economic, social and political contexts. An emphasis of this study was to examine the daily lives of MMA fighters to understand how their participation in what may be regarded as a hypermasculine activity affects their own perceptions of masculinity. In looking at how masculinity is embodied, the gaps and often contradictions between representation and individual experiences are revealed. Ultimately, the goal of this research is to contribute to a better understanding of masculinity as both an embodied and relational construct.
ContributorsHolthuysen, Jaime (Author) / Hjorleifur Jonsson (Thesis advisor) / Tsuda, Takeyuki (Committee member) / Ballestero-Salaverry, Andrea (Committee member) / Arizona State University (Publisher)
Created2011
Description
Like individual organisms, complex social groups are able to maintain predictable trajectories of growth, from initial colony foundation to mature reproductively capable units. They do so while simultaneously responding flexibly to variation in nutrient availability and intake. Leafcutter ant colonies function as tri-trophic systems, in which the ants harvest vegetation to grow a fungus that, in turn, serves as food for the colony. Fungal growth rates and colony worker production are interdependent, regulated by nutritional and behavioral feedbacks. Fungal growth and quality are directly affected by worker foraging decisions, while worker production is, in turn, dependent on the amount and condition of the fungus. In this dissertation, I first characterized the growth relationship between the workers and the fungus of the desert leafcutter ant Acromyrmex versicolor during early stages of colony development, from colony foundation by groups of queens through the beginnings of exponential growth. I found that this relationship undergoes a period of slow growth and instability when workers first emerge, and then becomes allometrically positive. I then evaluated how mass and element ratios of resources collected by the ants are translated into fungus and worker population growth, and refuse, finding that colony digestive efficiency is comparable to digestive efficiencies of other herbivorous insects and ruminants. To test how colonies behaviorally respond to perturbations of the fungus garden, I quantified activity levels and task performance of workers in colonies with either supplemented or diminished fungus gardens, and found that colonies adjusted activity and task allocation in response to the fungus garden size. Finally, to identify possible forms of nutrient limitation, I measured how colony performance was affected by changes in the relative amounts of carbohydrates, protein, and phosphorus available in the resources used to grow the fungus garden. From this experiment, I concluded that colony growth is primarily carbohydrate-limited.
ContributorsClark, Rebecca, 1981- (Author) / Fewell, Jennifer H (Thesis advisor) / Mueller, Ulrich (Committee member) / Liebig, Juergen (Committee member) / Elser, James (Committee member) / Harrison, Jon (Committee member) / Arizona State University (Publisher)
Created2011
Description
The repression of reproductive competition and the enforcement of altruism are key components to the success of animal societies. Eusocial insects are defined by having a reproductive division of labor, in which reproduction is relegated to one or few individuals while the rest of the group members maintain the colony and help raise offspring. However, workers have retained the ability to reproduce in most insect societies. In the social Hymenoptera, due to haplodiploidy, workers can lay unfertilized male destined eggs without mating. Potential conflict between workers and queens can arise over male production, and policing behaviors performed by nestmate workers and queens are a means of repressing worker reproduction. This work describes the means and results of the regulation of worker reproduction in the ant species Aphaenogaster cockerelli. Through manipulative laboratory studies on mature colonies, the lack of egg policing and the presence of physical policing by both workers and queens of this species are described. Through chemical analysis and artificial chemical treatments, the role of cuticular hydrocarbons as indicators of fertility status and the informational basis of policing in this species is demonstrated. An additional queen-specific chemical signal in the Dufour's gland is discovered to be used to direct nestmate aggression towards reproductive competitors. Finally, the level of actual worker-derived males in field colonies is measured. Together, these studies demonstrate the effectiveness of policing behaviors on the suppression of worker reproduction in a social insect species, and provide an example of how punishment and the threat of punishment is a powerful force in maintaining cooperative societies.
ContributorsSmith, Adrian A. (Author) / Liebig, Juergen (Thesis advisor) / Hoelldobler, Bert (Thesis advisor) / Gadau, Juergen (Committee member) / Johnson, Robert A. (Committee member) / Pratt, Stephen (Committee member) / Arizona State University (Publisher)
Created2011
Description
"Culture talk" figures prominently in the discussions of and about Muslims, both locally and globally. Culture, in these discussions, is considered to be the underlying cause of gender and generational divides giving rise to an alleged "identity crisis." Culture also presumably conceals and contaminates "pure/true Islam." Culture serves as the scaffold on which all that divides Muslim American immigrants and converts is built; furthermore, the fear of a Muslim cultural takeover underpins the "Islamization of America" narrative. This dissertation engages these generational and "immigrant"-"indigenous" fissures and the current narratives that dominate Muslim and public spheres. It does so through the perspectives of the offspring of converts and immigrants. As the children and grandchildren of immigrants and converts come of age, and distant as they are from historical processes and experiences that shaped the parents' generations while having shared a socialization process as both Muslim and American, what role do they play in the current chapter of Islam in post-9/11 America? Will the younger generation be able to cross the divides, mend the fissures, and play a pivotal role in an "American Muslim community"? Examining how younger generations of both backgrounds view each other and their respective roles in forging an American Muslim belonging, agenda and discourse is a timely and much needed inquiry. This project aims to contribute by shedding more light on the identities, perspectives and roles of these younger generations through the four dominant narratives of identity crisis, pure/true Islam vs. Cultural Islam, the Islamization of America, and creation of an American Muslim community/identity/culture. These narratives are both part of public discourse and themes generated from interviews, a questionnaire\survey, and personal observation. This ethnographic study examines how American born and/or raised offspring of both converts to Islam and immigrant Muslims in the Phoenix and Chicago metropolitan areas define self and community, how they negotiate fissures and fault lines (ethnicity, race, class, gender, and religious interpretation) within their communities, and how their faith informs daily life and envisions a future. I utilize participant observation, interviews, and surveys and examine digital, visual and published media to answer these questions.
ContributorsAli, Muna (Author) / Eder, James (Thesis advisor) / Jackson, Sherman (Committee member) / Hjorleifur Jonsson (Committee member) / Tsuda, Takeyuki (Committee member) / Arizona State University (Publisher)
Created2013
Description
Food system and health characteristics were evaluated across the last Waorani hunter-gatherer group in Amazonian Ecuador and a remote neighboring Kichwa indigenous subsistence agriculture community. Hunter-gatherer food systems like the Waorani foragers may not only be nutritionally, but also pharmaceutically beneficial because of high dietary intake of varied plant phytochemical compounds. A modern diet that reduces these dietary plant defense phytochemicals below levels typical in human evolutionary history may leave humans vulnerable to diseases that were controlled through a foraging diet. Few studies consider the health impact of the recent drastic reduction of plant phytochemical content in the modern global food system, which has eliminated essential components of food because they are not considered "nutrients". The antimicrobial and anti-inflammatory nature of the food system may not only regulate infectious pathogens and inflammatory disease, but also support beneficial microbes in human hosts, reducing vulnerability to chronic diseases. Waorani foragers seem immune to certain infections with very low rates of chronic disease. Does returning to certain characteristics of a foraging food system begin to restore the human body microbe balance and inflammatory response to evolutionary norms, and if so, what implication does this have for the treatment of disease? Several years of data on dietary and health differences across the foragers and the farmers was gathered. There were major differences in health outcomes across the board. In the Waorani forager group there were no signs of infection in serious wounds such as 3rd degree burns and spear wounds. The foragers had one-degree lower body temperature than the farmers. The Waorani had an absence of signs of chronic diseases including vision and blood pressure that did not change markedly with age while Kichwa farmers suffered from both chronic diseases and physiological indicators of aging. In the Waorani forager population, there was an absence of many common regional infectious diseases, from helminthes to staphylococcus. Study design helped control for confounders (exercise, environment, genetic factors, non-phytochemical dietary intake). This study provides evidence of the major role total phytochemical dietary intake plays in human health, often not considered by policymakers and nutritional and agricultural scientists.
ContributorsLondon, Douglas (Author) / Tsuda, Takeyuki (Thesis advisor) / Beezhold, Bonnie L (Committee member) / Hruschka, Daniel (Committee member) / Eder, James (Committee member) / Arizona State University (Publisher)
Created2012
Description
Of all the signals and cues that orchestrate the activities of a social insect colony, the reproductives' fertility pheromones are perhaps the most fundamental. These pheromones regulate reproductive division of labor, a defining characteristic of eusociality. Despite their critical role, reproductive fertility pheromones are not evenly expressed across the development of a social insect colony and may even be absent in the earliest colony stages. In the ant Camponotus floridanus, queens of incipient colonies do not produce the cuticular hydrocarbons that serve as fertility and egg-marking signals in this species. My dissertation investigates the consequences of the dramatic change in the quantity of these pheromones that occurs as the colony grows. C. floridanus workers from large, established colonies use egg surface hydrocarbons to discriminate among eggs. Eggs with surface hydrocarbons typical of eggs laid by established queens are nurtured, whereas eggs lacking these signals (i.e., eggs laid by workers and incipient queens) are destroyed. I characterized how workers from incipient colonies responded to eggs lacking queen fertility hydrocarbons. I found that established-queen-laid eggs, incipient-queen-laid eggs, and worker-laid eggs were not destroyed by workers at this colony stage. Destruction of worker-laid eggs is a form of policing, and theoretical models predict that policing should be strongest in incipient colonies. Since there was no evidence of policing by egg-eating in incipient C. floridanus colonies, I searched for evidence of another policing mechanism at this colony stage. Finding none, I discuss reasons why policing behavior may not be expressed in incipient colonies. I then considered the mechanism that accounts for the change in workers' response to eggs. By manipulating ants' egg experience and testing their egg-policing decisions, I found that ants use a combination of learned and innate criteria to discriminate between targets of care and destruction. Finally, I investigated how the increasing strength of queen-fertility hydrocarbons affects nestmate recognition, which also relies on cuticular hydrocarbons. I found that queens with strong fertility hydrocarbons can be transferred between established colonies without aggression, but they cannot be introduced into incipient colonies. Queens from incipient colonies cannot be transferred into incipient or established colonies.
ContributorsMoore, Dani (Author) / Liebig, Juergen (Thesis advisor) / Gadau, Juergen (Committee member) / Pratt, Stephen (Committee member) / Smith, Brian (Committee member) / Rutowski, Ronald (Committee member) / Arizona State University (Publisher)
Created2012
Description
The children of immigrants who arrived in the United States in the 1980s now make up one of the fastest growing components of American society. They face unique and interesting pressures as they incorporate aspects of their parents' heritage into their contemporary American lives. The purpose of this dissertation is to offer an in-depth look at the 1.5 and second generation by examining how the immigrant descendants negotiate assimilative pressures, transnational practices, and ethnic identification. Using ethnographic research methods, such as participant observation and in-depth interviews, I researched the children of immigrants, ages 18-30, living in northwest Arkansas, who have at least one immigrant parent from Latin America. This research is important because non-traditional receiving towns, especially more rural localities, are often overlooked by scholarly studies of migration in favor of larger metropolitan centers (e.g., Los Angeles, Chicago). Studying immigrant descendants in smaller towns that are becoming increasingly populated by Hispanic/Latinos will create a better understanding of how a new generation of immigrants is assimilating into American society and culture. To increase awareness on the Hispanic/Latino 1.5 and second generation living in small town America and to offer potential solutions to facilitate an upwardly mobile future for this population, my dissertation explores a number of research questions. First, how is this population assimilating to the U.S.? Second, are members of the 1.5 and second generation transnational? How active is this transnational lifestyle? Will transnationalism persist as they grow older? Third, how does this population identify themselves ethnically? I also pay particular attention to the relationships among assimilation, transnationalism, and ethnic identity. My dissertation documents the lived experiences of the 1.5 and second generation in northwest Arkansas. The children of immigrants are one of the fastest growing groups nationwide. To understand their world and the lives they lead is to understand the new fabric of American society. I anticipate that the results from this research can be used to facilitate easier transitions to the U.S. among current and prospective immigrant generations, ensuring a brighter outlook for the future of the newest members of U.S. society.
ContributorsSmith, Claire M. (Author) / Tsuda, Takeyuki (Thesis advisor) / Eder, James (Committee member) / Chance, John K. (Committee member) / Arizona State University (Publisher)
Created2014
Description
A notable feature of advanced eusocial insect groups is a division of labor within the sterile worker caste. However, the physiological aspects underlying the differentiation of behavioral phenotypes are poorly understood in one of the most successful social taxa, the ants. By starting to understand the foundations on which social behaviors are built, it also becomes possible to better evaluate hypothetical explanations regarding the mechanisms behind the evolution of insect eusociality, such as the argument that the reproductive regulatory infrastructure of solitary ancestors was co-opted and modified to produce distinct castes. This dissertation provides new information regarding the internal factors that could underlie the division of labor observed in both founding queens and workers of Pogonomyrmex californicus ants, and shows that changes in task performance are correlated with differences in reproductive physiology in both castes. In queens and workers, foraging behavior is linked to elevated levels of the reproductively-associated juvenile hormone (JH), and, in workers, this behavioral change is accompanied by depressed levels of ecdysteroid hormones. In both castes, the transition to foraging is also associated with reduced ovarian activity. Further investigation shows that queens remain behaviorally plastic, even after worker emergence, but the association between JH and behavioral bias remains the same, suggesting that this hormone is an important component of behavioral development in these ants. In addition to these reproductive factors, treatment with an inhibitor of the nutrient-sensing pathway Target of Rapamycin (TOR) also causes queens to become biased towards foraging, suggesting an additional sensory component that could play an important role in division of labor. Overall, this work provides novel identification of the possible regulators behind ant division of labor, and suggests how reproductive physiology could play an important role in the evolution and regulation of non-reproductive social behaviors.
ContributorsDolezal, Adam G (Author) / Amdam, Gro V (Thesis advisor) / Brent, Colin S. (Committee member) / Gadau, Juergen (Committee member) / Hoelldobler, Bert (Committee member) / Liebig, Juergen (Committee member) / Arizona State University (Publisher)
Created2012
Description
This dissertation is intended to tie together a body of work which utilizes a variety of methods to study applied mathematical models involving heterogeneity often omitted with classical modeling techniques. I posit three cogent classifications of heterogeneity: physiological, behavioral, and local (specifically connectivity in this work). I consider physiological heterogeneity using the method of transport equations to study heterogeneous susceptibility to diseases in open populations (those with births and deaths). I then present three separate models of behavioral heterogeneity. An SIS/SAS model of gonorrhea transmission in a population of highly active men-who-have-sex-with-men (MSM) is presented to study the impact of safe behavior (prevention and self-awareness) on the prevalence of this endemic disease. Behavior is modeled in this examples via static parameters describing consistent condom use and frequency of STD testing. In an example of behavioral heterogeneity, in the absence of underlying dynamics, I present a generalization to ``test theory without an answer key" (also known as cultural consensus modeling or CCM). CCM is commonly used to study the distribution of cultural knowledge within a population. The generalized framework presented allows for selecting the best model among various extensions of CCM: multiple subcultures, estimating the degree to which individuals guess yes, and making competence homogenous in the population. This permits model selection based on the principle of information criteria. The third behaviorally heterogeneous model studies adaptive behavioral response based on epidemiological-economic theory within an $SIR$ epidemic setting. Theorems used to analyze the stability of such models with a generalized, non-linear incidence structure are adapted and applied to the case of standard incidence and adaptive incidence. As an example of study in spatial heterogeneity I provide an explicit solution to a generalization of the continuous time approximation of the Albert-Barabasi scale-free network algorithm. The solution is found by recursively solving the differential equations via integrating factors, identifying a pattern for the coefficients and then proving this observed pattern is consistent using induction. An application to disease dynamics on such evolving structures is then studied.
ContributorsMorin, Benjamin (Author) / Castillo-Chavez, Carlos (Thesis advisor) / Hiebeler, David (Thesis advisor) / Hruschka, Daniel (Committee member) / Suslov, Sergei (Committee member) / Arizona State University (Publisher)
Created2012