https://repositorio.ufpb.br/jspui/handle/123456789/2349 Fri, 01 May 2026 22:15:44 GMT 2026-05-01T22:15:44Z https://repositorio.ufpb.br/jspui/handle/123456789/37878 Título: Toxicidade crônica do herbicida atrazina: impactos na reprodução de peixe-zebra (Danio rerio) Autor(es): Carvalho, Matheus Alves Soares de Orientador: Farias, Davi Felipe Abstract: Atrazine is one of the most widely used pesticides in Brazil and worldwide, and it is frequently detected in surface waters. However, its adverse effects on environmental and human health at environmentally relevant concentrations (i.e., realistic concentrations) and under long-term exposure remain largely unknown. Given this, the aim of this study was to investigate the effects of chronic atrazine exposure on reproductive parameters and toxicity biomarkers in zebrafish (D. rerio), using test concentrations ranging from the legal limit of this contaminant in drinking water to environmentally relevant concentrations. For this purpose, animals were sex- separated and exposed for 35 days to two atrazine concentrations, Low (0.4 μg/L) and High (2 μg/L), or only water (Control). During this period, the fish were allowed to reproduce to assess their spawning frequency and offspring viability. The embryos obtained throughout the exposure were monitored for mortality and malformations over 4 days. At the end of the experiment, animals were euthanized and dissected for gonad removal. Fish and gonads were weighed to calculate relative wet weight (%). The dissected organs were also subjected to enzymatic activity assays (LDH, CAT, GST, and GPx) and measurement of malondialdehyde (MDA) content. Exposed groups showed a significant decrease in egg viability compared with the control. In addition, offspring from exposed groups displayed significant hatching delay. LDH and CAT activities were respectively increased and decreased in exposed males, while GST activity was elevated in females. Relative wet weight of the organs, GPx activity, and MDA accumulation showed no significant differences among treatments. The results demonstrated that environmentally relevant concentrations of atrazine are not safe and are capable of deregulating ROS metabolism in zebrafish. Therefore, Brazilian legislation needs to be revised regarding the maximum permitted limit of atrazine in drinking water, since its presence may pose risks to environmental and possibly human health. Editor: Universidade Federal da Paraíba Tipo: TCC Fri, 03 Oct 2025 00:00:00 GMT https://repositorio.ufpb.br/jspui/handle/123456789/37878 2025-10-03T00:00:00Z https://repositorio.ufpb.br/jspui/handle/123456789/37877 Título: Análise dos processos de licenciamento ambiental na Secretaria do Meio Ambiente da Prefeitura Municipal de João Pessoa (SEMAM-PMJP) no ano de 2024: impactos potenciais sobre a fauna e flora Autor(es): Souza, Matheus Santana de Orientador: Barbosa, Maria Regina de Vasconcellos Abstract: The present study conducted a critical analysis of a series of environmental technical reports issued by the Municipal Environment Secretariat (SEMAM) of João Pessoa, aiming to assess the environmental impacts and ecosystem service trade-offs generated by various urban developments located in environmentally sensitive areas of the city. The research methodology involved a technical and systematic review of the documents, combined with the application of economic valuation methods for ecosystem services, with adjustments based on national studies focused on the Atlantic Forest. The analysis was performed using a randomized selection of reports produced by the team of the Environmental Studies and Research Division (DIEP/SEMAM-PMJP). The developments studied were located in the neighborhoods of Jardim Oceania, José Américo, Portal do Sol, Cruz das Armas, Aeroclube, and Costa do Sol. Significant environmental impacts were identified, particularly the loss of native vegetation, habitat fragmentation, changes in hydrological regimes, improper solid waste disposal, and threats to local wildlife. The economic valuation of lost ecosystem services was calculated using formulas that considered the impacted area and the type of affected service. The total estimated value of ecosystem service losses in the analyzed developments exceeded R$ 8 million, highlighting the magnitude of the impacts caused by the conversion of natural areas into urban land uses. Furthermore, the study critically assessed the environmental licensing instruments used at the municipal level, such as the Environmental Feasibility Study (EVA) and the Simplified Environmental Report (RAS), concluding that these often show limitations in identifying and adequately mitigating cumulative and indirect impacts. It was observed that the mitigation and compensation measures proposed in the analyzed processes generally fail to fully offset the ecological trade-offs generated, emphasizing the need to improve the technical rigor of requirements and the enforcement of their implementation. It becomes evident that the growing demand for new urban developments in João Pessoa is placing pressure on ecosystems of high environmental importance. The analyses demonstrated the necessity of strengthening the city’s environmental management tools. Editor: Universidade Federal da Paraíba Tipo: TCC Fri, 02 May 2025 00:00:00 GMT https://repositorio.ufpb.br/jspui/handle/123456789/37877 2025-05-02T00:00:00Z https://repositorio.ufpb.br/jspui/handle/123456789/37871 Título: Quiropterofauna da Fazenda Salambaia, Cabaceiras, Paraíba: quais espécies conseguem permanecer em uma das regiões mais secas do Brasil? Autor(es): Barreto, Giuseppe Rolim de Araújo Orientador: Cordeiro Estrela de Andrade Pinto, Pedro Abstract: Bats exhibit a wide ecological and evolutionary diversity, providing various ecosystem services. They are the most diverse mammals in the Caatinga, despite it being the brazilian biome where they are least studied. The Cariri Paraibano is particularly undersampled regarding its chiropterofauna. In this context, this study aimed to describe the patterns of species richness, abundance, and composition of bats in rock slabs areas and shrub-arboreal Caatinga at Fazenda Salambaia, in Cabaceiras, comparing the effectiveness of regular mist nets with ultrathin nets over a one-year period across 22 sampling points. A total of 350 individuals from 19 species were captured. Significant differences in species richness, abundance, and composition were found between the types of areas sampled. Regarding net types, no significant difference was observed in the abundance of individuals; however, species richness and composition were significantly different, suggesting that ultrathin nets were more efficient than conventional nets in recording bats. There was no significant difference in species richness, abundance, or composition in relation to seasonality, indicating that the preservation status of the locality allows it to sustain a highly representative diversity even during the dry season, emphasizing the importance of the APA do Cariri Paraibano for bat conservation in the Caatinga. Including records from pilot samplings, a total of 20 species were recorded, representing approximately 22% of the bat diversity in the Caatinga and increasing the number of species known for the Cariri Paraibano to 27. The significance of sampling different microhabitats is highlighted, as well as the use of ultrathin nets to obtain more robust inventories. The importance of well-preserved areas for the maintenance of the chiropterofauna in the Caatinga is also underscored. Editor: Universidade Federal da Paraíba Tipo: TCC Mon, 02 Mar 2026 00:00:00 GMT https://repositorio.ufpb.br/jspui/handle/123456789/37871 2026-03-02T00:00:00Z https://repositorio.ufpb.br/jspui/handle/123456789/37863 Título: Potencial de microrganismos associados ao Maxixe-do-norte (Cucumis anguria) na biorremediação de solo contaminado com óleo lubrificante Autor(es): Mendes, Ádria Anacleto Pereira Orientador: Silva, Maria Cristina Basilio Crispim da Abstract: Contamination caused by used lubricating oil represents a serious problem for human and environmental health, as these compounds are toxic, persistent, and highly polluting. In this context, bioremediation emerges as a simple and low-cost strategy aimed at mitigating the environmental impacts of pollutants. This study sought to identify endophytic bacteria associated with Cucumis anguria cultivated in soil contaminated with a mixture of used lubricating oil, as well as to evaluate their biodegradation potential. A total of 18 bacterial species were found, Gram-positive: Bacillus cereus/thurigiensis III, Bacillus cereus/thurigiensis IV, Bacillus mycoides, Micrococcus luteus, Priestia flex, Lysinibacillus fusiformis, Bacillus pumilus, Paenibacillus apiarus, Bacillus subtilis, Staphylococcus saprophyticus, and Brevibacterium casei and Gram-negative: Enterobacter hormaechei, Acinetobacter radioresistens, Pseudomonas mendocina, Pseudomonas stutzeri, Pseudomonas aeruginosa, Moraxella osloensis, and Enterobacter cloacae. Assays with lubricating oil indicated emulsification capacity and the ability to utilize hydrocarbons as the sole carbon source, in addition to the resistance of C. anguria to the contaminated environment. The results indicate that the endophytes associated with C. anguria show promising potential for application in the bioremediation of environments impacted by petroleum and its derivatives, representing a viable alternative for the treatment of soils contaminated by these pollutants. Editor: Universidade Federal da Paraíba Tipo: TCC Mon, 06 Oct 2025 00:00:00 GMT https://repositorio.ufpb.br/jspui/handle/123456789/37863 2025-10-06T00:00:00Z