Made available in DSpace on 2014-06-11T19:22:22Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-01-30Bitstream added on 2014-06-13T19:07:47Z : No. of bitstreams: 1 faccioli_ck_me_jabo.pdf: 2072027 bytes, checksum: 58de1d06e05f35b0cac0a9f1b883972d (MD5) / Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) / Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) / O conhecimento das características morfológicas do tubo digestivo, associado aos processos de digestão e absorção, é essencial para a compreensão da fisiologia e nutrição de peixes, auxiliando no planejamento de dietas para a criação e manejo de animais com potencial para piscicultura. Assim sendo, este trabalho descreveu o tubo digestivo de Hemisorubim platyrhynchos, por meio de estudos macroscópicos, histológicos, histoquímicos de mucossubstâncias e ultraestruturais (microscopia eletrônica de varredura e de transmissão). A estrutura do tubo digestivo de H. platyrhynchos é típica de peixes carnívoros, composta por esôfago curto e distensível, estômago volumoso e muscular e intestino curto, com pregas longitudinais que diminuem em direção à região posterior. O esôfago apresentou a camada mucosa revestida por epitélio estratificado pavimentoso, cujas células epiteliais em MET mostraram microssaliências digitiformes, além de “club cells” com citoplasma homogêneo e poucas organelas e células caliciformes com citoplasma repleto de grânulos de secreção. O estômago foi morfologicamente dividido em região cárdica, fúndica e pilórica, com camada mucosa composta por epitélio simples colunar (com mucossubstâncias apicais protetoras) e porção glandular bem desenvolvida nas regiões cárdica e fúndica. A região pilórica aglandular apresentou camada muscular espessa (esfíncter pilórico). O intestino apresentou epitélio simples colunar e células caliciformes aumentando em número na região posterior. As células secretoras apresentaram características morfológicas e histoquímicas distintas em cada segmento do tubo digestivo: células caliciformes esofágicas (muco neutro e ácido, carboxilado e sulfatado); células epiteliais gástricas (muco neutro); células caliciformes no intestino anterior, médio, posterior e células epiteliais na região retal (muco neutro e ácido, carboxilado e sulfatado) / The knowledge of the morphological features of the digestive tract, associated with the digestion and absorption processes is essential for the understanding of fish nutrition and physiology, assisting in planning diets for the rearing and management of animals with potential for fish farming. Therefore, this paper describes the digestive tract of Hemisorubim platyrhynchos, by macroscopic, histological, histochemical of mucosubstances and ultrastructural studies (scanning and transmission electron microscopy). The structure of the digestive tract of H. platyrhynchos is typical of carnivorous fish, consisting of short and distensible esophagus, large and muscular stomach, and short intestine with longitudinal folds which decrease towards the posterior region. The esophagus presented the mucosa layer lined by stratified squamous epithelium, which epithelial cells in MET showed fingerprint-like microridges, club cells with homogeneous cytoplasm and few organelles and goblet cells filled with secretion granules. The stomach was morphologically divided into the region cardic, fundic and pyloric, with the mucosa layer composed of simple columnar epithelium (with protective mucosubstances apical) and well-developed glandular portion of the cardic and fundic regions. The aglandular pyloric region showed thick muscular layer (pyloric sphincter). The intestine showed simple columnar epithelium and goblet cells increasing in number in the posterior region. The secretory cells showed distinct morphological and histochemical features in each segment of the digestive tract: esophageal goblet cells (neutral and acid mucus, carboxylated and sulfated), gastric epithelial cells (mucus neutral), goblet cells in the anterior, middle and posterior intestine and epithelial cells in the rectal portion (neutral and acid mucus, carboxylated and sulfated)

This thesis discusses the detrimental effects that industrialized farming practices have on public health, animal welfare, and ecological systems and includes factual support. It also provides practical application of this information as well as possible solutions and a detailed description of a related art exhibition.

Thesis (M.Dev.) --University of Limpopo, 2018 / The purpose of this study was to investigate the contribution of small-scale fish farming sub-sector to rural income generation in Thulamela Municipality in Limpopo Province, South Africa.The study applied a qualitative method to collect data from individual respondents of same characteristics using the semi-structured interview involving 15 small scale fish farmers. The findings from the study revealed that in terms of gender, more men were participating in the fish farming sector than women. About 73 percent of the total participants were men as compared to 27 percent of women participating in fish farming. In terms of age, a large proportion of farmers were men and women within the age range of 41-50 years and above 50 years who participated more actively in fish farming than other age groups. The results revealed some challenges and constraints characterised by theft of fish by community members, fish-eating birds or predators, poor access to funding, expensive fish feed, unavailability of fish feed, shortage of land, lack of proper infrastructure, and insufficient water supply during the drought period. As part of recommendations, some interventions should be developed to address the constraints and challenges revealed in the study. Small-scale fish farmers should be assisted to have access to proper infrastructure, boreholes to supplement available water during the dry season, fish feed, the agricultural market, land and other resources for fish farming.

The purpose of this research was to describe technopolitics on a permaculture farm. The literature on technology and technopolitics is beginning to take shape around a series of unanswered questions regarding the role and potential of objects in social life. Using an actor-network theory framework and relying on Callon's (1984) sociology of translation and its principles, I identified the concept of defect and tracked how it was mobilized at Manitoulin Permaculture through participant observation across two summers. The concept of defect incorporated both sociopolitical as well as technological factors. The makers at Manitoulin Permaculture made sense of their choice to defect to a new life at Manitoulin Permaculture. In addition, their technologies, both new and old, became defective, animating their community in new and unforeseen ways.

Narcissism has been identified as a threat to society and the individual. Individuals with high levels of narcissism (narcissistic personality disorder) struggle to maintain jobs, stable relationships, and healthy life perspectives. Without knowledge about the origins of narcissism, mental health professionals may only be treating the symptoms of narcissism and not the factors that perpetuate its development. The purpose of this study was to measure narcissism in farming and law careers and to determine whether career is a factor in the development of narcissism. It was predicted that career would be an important developmental event and process that would have the ability to influence character traits (such as narcissism) through self-presentation, a process in symbolic interaction theory. To date, there has been no research on type of career as a factor in the development of narcissism. A cross-sectional design and 2-way independent analysis of covariance was used to compare narcissism in farming (N = 46) and law careers (N = 267) at the beginning and middle of individuals' careers, as well as after 10 years of experience. Statistical analysis showed no significant difference in narcissism between farmers and lawyers. Further, there was no significant difference in narcissism levels at the different stages of a law or farming career. Thus, career may not be a factor in the development of narcissism, and future research, theory development, treatment design, and cultural considerations may be best served by focusing on other phenomena to explain narcissism's effect in adulthood.

This thesis is using a framework to analyse the process of transition from foraging to farming in northeast China. Tool complexes analysis is the particular method used to retreive prehistoric economies. Based on the result of these case studies about prehistoric economies in northeast China, this thesis attemp to apply the availability model of transition to farming in northern Europe, proposed by Zvelebil and Rowley-Convy, in the new area northeast China. The result of this research has implicated that the transition to farming in prehistory is the result of the interaction between human societies and environment. among many factors in this interaction, the motivation that prehistoric societies choosing agriculture economy to meet social, political and economic needs would have to be the major one leading to the transition occurred.

Thesis (Ph. D.)--Washington State University, May 2007. / Includes bibliographical references.

Linear economic models were utilized to predict effects of various environmental control policies on individual firms. Four different linear models were specified and in some instances relatively minor changes in specification were made which resulted in additional sub-models. Models varied as to numbers and types of fixed factors, variable cost relationships, market products, and fixed factor requirements. Once each model or sub-model was described five or six policies were theoretically applied to that model. Policies used were: taxing market products, taxing variable factors, taxing a non-market externality (external diseconomy), a standard on the quality of the externality, subsidizing variable factors and subsidizing fixed factors. It was assumed that the non-market externality would be produced in a fixed ratio with market products. Furthermore, the assumption was made that alternative production techniques were available to the firm. The important aspect of the various techniques was that the proportion of the externality generated by a market product varied by production method. Consequently, strong emphasis in the analysis was placed on determining whether or not a given policy could induce the firm to switch to a lower externality generating production method. In addition to the strictly theoretical analysis a linear irrigated farm model was described. The farm model produced irrigation return flows which were considered to be creating stream pollution. From the theoretical analysis likely policies for controlling return flows were ascertained. Some of these policies were then applied to the farm model. Specifically, a water tax (variable factor tax) and a constraint on delivered water were administered to the farm model. Based on the theoretical analysis taxing market products did not appear to be a particularly desirable policy. For some models, the market product tax actually increased externality production. A tax on externality production (effluent tax) seemed to give the most consistent effects of all policies across all models. The externality tax either reduced or had no effect on externality production. The biggest shortcoming of the externality tax appeared to be administrative. Before the tax can be used the externality must be identifiable as to source. Consequently, a search was made for policies which generated results similar to the externality tax yet were not subject to the same administrative problem. It appeared that under specific conditions a variable factor tax, a tax on specialized fixed factors or a combination of a tax-subsidy scheme could be effective alternative policies. However, these latter policies, if improperly applied could result in increased externality production. Taxes as high as 65 cents per acre inch of water were applied to the farm model. Depending on assumed conditions the water tax resulted in reduced irrigation return flows. When labor was constrained tax levels needed to be higher to reduce return flows compared to the case where labor was not constrained. Placing a restraint on delivered water also reduced return flows. Again, when labor was constrained this policy was not as effective as when labor was unconstrained. The water tax policy reduced net returns to the farm model considerably more than the constraint on delivered water. The main difference in net revenues was attributable to the total water tax bill rather than reductions from other added costs and/or enterprise changes. / Graduation date: 1972

Raphael is leading a hedonistic life when he has a traumatic realization that the world is indifferent about who lives and who dies, and Raphael is no exception. This is a story, written by Raphael, about seeking to reconcile the fleeting world he and everyone else has been subjected to.

The space on which the urban farm is produced has a history of its own that can be explored for evidence of neoliberal shaping and retooling. This thesis explores how the city and the farm are understood through the complex articulations of farmers and through the account of the specific historical and geographical context of the farm. The urban farm is a uniquely situated land use that can provide the spaces for contestation to the neoliberalization of the city and the United States food system. Through qualitative analysis, including a case study, interviews with farmers, participant observation, and archival data collection, this research examines the city and the farm from the perspective of the farmer to understand the degree to which these contestations are resisting neoliberalism. Furthermore, it suggests that scholars of neoliberalism and urban farming should more fully consider the hybridized nature in which urban farmers understand their work.