http://repositorio.ufc.br/handle/riufc/22005 2026-11-15T07:45:21Z 2026-11-15T07:45:21Z Fortuna, Gabriela Teles http://repositorio.ufc.br/handle/riufc/87399 2026-08-05T16:36:44Z 2026-01-01T00:00:00Z

Título: Avaliação do risco de extinção de cavalos-marinhos (Hippocampus spp.) no Estado do Ceará Autor(es): Fortuna, Gabriela Teles Abstract: Seahorses (Hippocampus spp.) are organisms highly dependent on structured estuarine habitats and are particularly vulnerable to environmental degradation and anthropogenic pressures. In the state of Ceará, these ecosystems suffer from impacts associated with siltation, shrimp farming, and tourism, raising concerns about the conservation status of these species. This study aimed to assess the extinction risk of Hippocampus reidi and Hippocampus erectus in Ceará based onthe International Union for Conservation of Nature (IUCN) Red List criteria. The assessment was conducted by applying IUCN criteria A–E, using bibliographic data, occurrence records, and information on population trends and habitat quality across different estuaries. For H. reidi, evidence from the Pacoti River estuary indicated a population reduction of approximately 60% over ten years, a pattern consistent withdeclines observed in other coastal areas of the state associated with habitat degradation. Based on criterion A2cd, the species was classified as Endangered (EN). For H. erectus, the scarcity and low reliability of occurrence records prevented robust inferences about its distribution and population dynamics, resulting in its classification as Data Deficient (DD). The results highlight a significant vulnerability of seahorses in Ceará and reinforce the need for systematic monitoring to support conservation and management strategies. Tipo: TCC

2026-01-01T00:00:00Z Silva, Nadia Damasceno http://repositorio.ufc.br/handle/riufc/87227 2026-07-23T16:25:50Z 2026-01-01T00:00:00Z

Título: Avaliação da atividade antimicrobiana de óleos essenciais de Eugenia spp. Autor(es): Silva, Nadia Damasceno Abstract: Antimicrobial resistance is one of the major current challenges in healthcare, representing one of the main threats to global health, and is strongly associated with the misuse of antibiotics, including self-medication, early discontinuation of treatment, and indiscriminateadministration. The mechanisms of microbial resistance are diverse and may involve structural and functional alterations in microbial cells. Therefore, the use of natural products as a source of antimicrobial bioactive compounds has become relevant due to their plurality ofmechanisms of action, and among these, essential oils stand out. The present study aimed to evaluate the effects of essential oils from Eugenia azeda, Eugenia luschnathiana and Eugenia uniflora against strains of Staphylococcus aureus, including a methicillin-resistant isolate(MRSA), and Candida spp., including a fluconazole-resistant isolate (FRCA). The samples were diluted in 5% DMSO, ensuring a final concentration below 2,5% in the assay, and subjected to broth microdilution, using RPMI 1640 medium buffered with MOPS (0.165 M)for the fungal assays, and Mueller-Hinton broth for the bacterial assays, at concentrations ranging from 20% to 0.04% (yeasts) and 5% to 0.01% (bacteria). Readings were performed by visual identification after 24h, with the Minimum Inhibitory Concentration (MIC) being defined as the lowest concentration capable of inhibiting 50% of fungal growth or 100% ofbacterial growth. All essential oils analysed showed antimicrobial activity. Eugenia uniflora oil stood out against Candida spp., with MIC50 below 1% for both strains (0.47% for C. parapsilosis and 0.63% for FRCA). Eugenia luschnathiana oil, in turn, showed the highest bacterial activity, with a MIC100 of 0.10% against the standard S. aureus strain, and of only0.02% against MRSA, indicating relevant potential even against the multidrug-resistant strain. Eugenia azeda, although it did not stand out among the tested strains, showed positive antimicrobial activity. These results are promising, considering the scarce literature availableon the species Eugenia azeda and Eugenia luschnathiana. However, further studies are needed to evaluate the possible mechanisms of action and the antibiofilm potential of these species. Tipo: TCC

2026-01-01T00:00:00Z Soares, Samilly Mendes http://repositorio.ufc.br/handle/riufc/87148 2026-07-16T12:51:47Z 2026-01-01T00:00:00Z

Título: Fragilidade ambiental potencial e emergente associada ao uso do solo na área de proteção ambiental do rio Pacoti (CE) Autor(es): Soares, Samilly Mendes Abstract: Coastal environments constitute dynamic and complex systems resulting from the interaction between continental, marine, and atmospheric processes, presenting high ecological and socioeconomic relevance, as well as significant environmental susceptibility to anthropogenic pressures. In this context, Environmental Protection Areas, by allowing the sustainable use of the territory, require technical instruments capable of supporting environmental planning and management. Therefore, this study aimed to analyze the environmental fragility of the Rio Pacoti Environmental Protection Area, located on the eastern coast of the state of Ceará, based on the integration of physical-natural conditions and land use and occupation dynamics. The research is characterized as an applied study with qualitative and quantitative approaches, developed through desk-based analysis and the exclusive use of secondary data. The assessment of environmental fragility was based on the distinction between potential environmental fragility, associated with the natural attributes of the physical environment, including soil, relief, and vegetation, and emerging environmental fragility, resulting from the interaction between potential fragility and anthropogenic pressures related to land use and land cover. The analysis was structured through the characterization of the geoenvironmental units of the study area and the systematization of information from official cartographic databases and technical documents. The results revealed significant spatial contrasts among the geoenvironmental units of the Rio Pacoti Environmental Protection Area. Environments associated with fluvio-marine plains, dune fields, and beach zones exhibited the highest levels of environmental fragility, resulting from high natural susceptibility combined with intensified anthropogenic pressures. In contrast, geomorphologically more stable units, such as pre-coastal tablelands, showed an increase in emerging environmental fragility due to the expansion of land uses incompatible with their support capacity. It is concluded that the environmental fragility of the Rio Pacoti Environmental Protection Area results from the interaction between the physical-natural organization of the landscape and land use and occupation patterns, reinforcing the importance of integrated approaches as support for planning and environmental management in coastal conservation units. Tipo: TCC

2026-01-01T00:00:00Z Bitu, Fillipe Santos http://repositorio.ufc.br/handle/riufc/87113 2026-07-14T15:56:31Z 2026-01-01T00:00:00Z

Título: Folhas de Eugenia spp. como fonte de óleos essenciais com atividade larvicida sobre Aedes aegypti Autor(es): Bitu, Fillipe Santos Abstract: As a vector for several distinct diseases, the Aedes aegypti mosquito is an invasive species in Brazil that originated on the African continent, it poses a public health problem due to its short life cycle and its ability to adapt to chemical insecticides over successive generations. As an alternative, control can be achieved using bioinsecticides made from essential oils (EO’s), compounds derived from plants, which, in addition to being biodegradable, are complex structures that make it difficult for the larvae to adapt when exposed to them. Belonging to the Myrtaceae family, the genus Eugenia is known for producing essential oils with larvicidal activity; therefore, the objective of this study is to analyze the efficacy of essential oils from the species Eugenia azeda and Eugenia luschnathiana compared to Eugenia uniflora, which is known for its high larval lethality. To this end, the methodology employed involved collecting plants at the Federal University of Ceará, Pici Campus, in Fortaleza and in Aquiraz, in the state of Ceará, and extracting the essential oils by steam distillation using a Clevenger-type apparatus. The results show that the 50% lethal concentration (LC50) of E. uniflora (12.602 ± 1.783 μg/mL, and 8.5075 ± 0.528 μg/mL, at 48 hours) and E. azeda (27,13467 ± 1,322 μg/mL over 24 hours, and 17,46333 ± 1,508 μg/mL over 48 hours) were statistically identical during the 24- and 48-hour exposure periods, but both were higher than those of E. luschnathiana (60,93233 ± 6,093 μg/mL over 24 hours, and 35,17367 ± 6,583 μg/mL over 48 hours). Regarding the 90% Lethal Concentration (LC90) over the 24-hour period, the most lethal species was E. uniflora (23,92 ± 1,015 μg/mL), while the other species did not differ statistically from one another. However, over the 48-hour period, E. azeda (35,098 ± 2,596 μg/mL) showed increased lethality, becoming statistically equivalent to E. uniflora (20,824 ± 3,164 μg/mL) while E. luschnathiana (57,03267 ± 3,280 μg/mL) remained lower in terms of lethality. Finally, this study concludes that the most lethal essential oil for the larvae is that of E. uniflora, followed by E. azeda, with E. luschnathiana being the least lethal. Tipo: TCC

2026-01-01T00:00:00Z