https://tede.unioeste.br/handle/tede/606 2026-09-13T02:32:49Z 2026-09-13T02:32:49Z Costa, Leonan Coelho da https://tede.unioeste.br/handle/tede/8609 2026-08-13T17:42:18Z 2026-03-09T00:00:00Z

Title: Integração de geotecnologias e análise hidrogeotécnica na segurança de barragem de um lago urbano sob eventos pluviométricos Autor: Costa, Leonan Coelho da Primeiro orientador: Makrakis, Maristela Cavicchioli Abstract: This research evaluated the safety of the barrage of the Municipal Lake of Toledo, Paraná, by means of the integration of geotechnologies and hydrogeotechnical monitoring, considering the influence of two pluviometric events on the hydrological dynamics of the microbacia of Sanga Panambi. The study was structured in two complementary studies. Initially, an integrated topobatimetric characterization of the Municipal Lake and Sanga Panambi was carried out, using surveys with GNSS RTK, ecobathmeter, unmanned aerial vehicle and geoprocessing tools, aiming to represent the morphology, or relay and armament capacity of two water bodies. Subsequently, hydrogeotechnical monitoring of the barrage was carried out, with records of precipitation, linimetric levels, phreatic line by half of piezometers and vacuums in the lake in Sanga Panambi, integrated by statistical and spatial analyses. The topobathymetric results will allow identifying flat areas, transition zones, deep depressions and assessment patterns, in addition to estimating normal volume of 49,759.69 m³ and maximum volume of 143,157.86 m³ for the Municipal Lake. The difference between the scenarios shows the regulatory function of the reservoir in the damping of pressure peaks. The hydrogeotechnical monitoring demonstrates a consistent relationship between precipitation events, elevation of the reservoir levels, increase in current vazões and temporary alterations in the piezometric conditions of the mass. The water located in the lake presents a lower amplitude of variation, while the points located in Sanga Panambi will respond more quickly and intensely to the rainwater. Despite the sensitivity of the structure to rainfall events, no critical conditions of geotechnical instability or compromise of hydraulic performance have been identified during the monitored period. It is concluded that the integration between geotechnologies and pluviometric, linimetric, fluviometric and piezometric data constitutes an efficient approach to characterize urban water systems, assess cliffs and support the monitoring of barrage security. The results provide technical subsidies for urban and environmental planning, cliff management, development and updating of barrage safety instruments and adoption of preventive measures in urban areas subject to hydrological variability. Publisher: Universidade Estadual do Oeste do Paraná Tipo do documento: Tese

2026-03-09T00:00:00Z Souza, Pauliana Leão de https://tede.unioeste.br/handle/tede/8463 2026-06-15T18:14:46Z 2026-03-09T00:00:00Z

Title: Liofilização de produtos aquáticos: tendências científicas, desafios atuais e influência da geometria de corte na qualidade de filés de tilápia-do-Nilo (Oreochromis niloticus) Autor: Souza, Pauliana Leão de Primeiro orientador: Signor, Altevir Abstract: In this review, we synthesize the literature on the freeze-drying of aquatic products to analyze the current state of research on this topic worldwide. In total, 345 publications met the inclusion criteria. It was observed that, from 1958 onwards, the volume of published studies grew considerably, distributed across 181 journals in the areas of Analytical Chemistry, Biochemistry, and Food Science and Engineering. The journals Food Chemistry (6.96%), International Journal of Biological Macromolecules (2.90%), Journal of Food Science (2.90%), and Journal of the Science of Food and Agriculture (2.90%) concentrated the largest number of publications. The study of freeze-drying in aquatic products has sparked the interest of researchers in 51 countries. However, scientific output has been concentrated in China (21.74%) and the United States (8.70%). In contrast, publications originating from Oceania, Africa, and Central America have remained scarce. Furthermore, although the research covered 12 different types of raw materials, fish (64.68%) was the main target of the investigations. Among the fish species, Nile tilapia (Oreochromis niloticus) was the one with the greatest interest for the application of the freeze-drying method (7.20%) in the studies. There was a predominance of studies involving muscle tissues and their derivatives (41.13%) and protein biomolecules (23.38%). The focus of most of the research was related to the areas of Food Engineering (48.93%) and Analytical Chemistry (17.91%). Predominance observed in most of the countries analyzed. However, although the scope of the studies has changed over the years, most publications have remained in already established areas. Furthermore, research is needed to reduce energy costs and improve equipment, aiming to expand access to freeze-drying in regions where its use is still limited. In addition, it is essential to delve deeper into underexplored fields such as Animal Health and Genetics, as well as investigations into the freeze-drying of aquatic by-products, with the goal of adding value and ensuring the sustainability of the process. Publisher: Universidade Estadual do Oeste do Paraná Tipo do documento: Tese

2026-03-09T00:00:00Z Yunes, Rosinara Virginia Ferreira https://tede.unioeste.br/handle/tede/8449 2026-06-09T19:41:58Z 2026-03-09T00:00:00Z

Title: Socioeconomia e qualidade de vida dos pescadores profissionais do entorno do Parque Nacional de Ilha Grande MS/PR, Brasil Autor: Yunes, Rosinara Virginia Ferreira Primeiro orientador: Kashiwaqui, Elaine Antoniassi Luiz Abstract: This research investigates the socioeconomic conditions and quality of life of professional fishers operating in the surroundings of Ilha Grande National Park, located in the Upper Paraná River Basin, a region marked by profound environmental transformations resulting from river damming and the establishment of protected areas. Developed in a multipaper format, the dissertation articulates two complementary empirical studies based on interviews with 59 professional fishers, combining descriptive analysis, content analysis, and multidimensional perceptual assessment. The first study characterizes the socioeconomic and productive profile of these fishers, highlighting the aging of the category, low educational attainment, economic dependence on fishing, declining income, and changes in fish composition associated with historical damming processes along the Paraná River. The second study deepens this analysis by evaluating fishers’ quality of life across economic, social, and environmental dimensions, comparing the fishers’ own perceptions with assessments of institutional governance. The findings reveal significant divergences between these rationalities, indicating that quality of life cannot be understood through isolated or exclusively institutional indicators, but rather as a multidimensional construct shaped by environmental, economic, and social factors, as well as by traditional fishing knowledge. By shedding light on tensions between environmental conservation, public policies, and traditional ways of life, this research contributes to the debate on professional fishing in protected areas and to the formulation of management strategies that are more responsive to the social realities of fishing communities. Publisher: Universidade Estadual do Oeste do Paraná Tipo do documento: Tese

2026-03-09T00:00:00Z Silva, Ricardo Cezar Alves Vieira da https://tede.unioeste.br/handle/tede/8297 2026-03-06T19:58:47Z 2025-11-03T00:00:00Z

Title: Análise da viabilidade técnico econômica na criação de tambaqui (Colossoma macropomum) em tanques escavados em Rondônia, Brasil Autor: Silva, Ricardo Cezar Alves Vieira da Primeiro orientador: Signor, Altevir Abstract: Aquaculture has emerged as one of the most dynamic agro-productive activities worldwide, contributing to food security, income generation, and regional development. In Brazil, fish farming has gained increasing importance, with tambaqui (Colossoma macropomum) standing out as the main native species cultivated, especially in the Amazon region. The present study aimed to analyze the technical and economic feasibility of tambaqui farming in earthen ponds in the state of Rondônia, evaluating productive and financial performance indicators, as well as comparing management strategies, with emphasis on partial harvesting. For this purpose, the research was conducted on a fish farm of 125.2 hectares, located in Cujubim (RO), consisting of 34 grow-out ponds and 11 nursery ponds. Data collected between 2018 and 2022 were analyzed, including production costs, feed prices, revenues, and zootechnical indicators. The economic analyses included the calculation of Net Present Value (NPV), Internal Rate of Return (IRR), Payback Period, Gross Margin, Profitability Index, and Break-even Point, complemented by sensitivity simulations. The results showed that the initial investment was R$ 7,499,693.43, with an annual operating cost of R$ 6,219,530.54. Feed accounted for 82.4% of total costs. The average productivity reached 7,223.99 kg/ha/year, with a gross margin of 9.10% and profitability of 8.33%. The financial analysis indicated a negative NPV (-R$ 30,337,583.19) and an IRR of -6.11% for a minimum attractive rate of 10%, demonstrating economic unfeasibility under current conditions. However, the sensitivity analysis showed that a 10% increase in fish selling price (R$ 8.83/kg) would result in a positive NPV of R$ 18,814,111.43 and an IRR of 17.26%, making the activity economically viable. In the comparative study between management strategies, partial harvesting showed higher productivity (10,474.34 kg/ha) but higher costs and lower profitability (1.81%) compared to total harvesting (13.88%), which proved to be more economically efficient. Publisher: Universidade Estadual do Oeste do Paraná Tipo do documento: Tese

2025-11-03T00:00:00Z