Banca de DEFESA: ADRIAN PEREIRA DA SILVA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : ADRIAN PEREIRA DA SILVA
DATE: 15/05/2025
TIME: 15:00
LOCAL: Google Meet (https://meet.google.com/bbp-zzxf-gwd)
TITLE:

Assessment of the impacts of the 2019 oil disaster on the marine biota of Rio Grande do Norte State.

KEY WORDS:

Stomach content; Oil spill; Polycyclic aromatic hydrocarbon; Histopathology.

PAGES: 54
BIG AREA: Ciências Biológicas
AREA: Ecologia
SUMMARY:

Oil spills are high-impact environmental events for the affected areas. Oil and its derivatives are toxic compounds capable of persisting in the environment for long periods in the form of chemical molecules called Polycyclic Aromatic Hydrocarbons (PAHs). Their harmful effects on ecosystems and marine fauna occur in the short, medium, and long term and include immediate death from inhalation of toxic vapors, tissue damage, physiological irregularities, ontogenetic problems, and effects associated with bioaccumulation. Thus, in an oil spill event, the contamination of animals and plants is concerning, as it affects the population health of species and the environment. However, the contamination process does not occur equally among the different affected groups. These differences may arise from the diversity of intrinsic ecological characteristics of each species and their relationship with varying levels of vulnerability to contaminants. Therefore, in addition to assessing overall contamination levels, it is necessary to consider species-specific values and reflect on the influence of ecological factors as sources of variation. This study aims to investigate oil contamination in marine organisms from three different taxa (mollusks, crustaceans, and fish) collected from four beaches in the southern coast of Rio Grande do Norte, a region affected by the 2019 oil spill disaster in Brazil. The research uses the ecology of different species as a backdrop to understand contamination levels and associated impacts. In Chapter I, we conducted chemical analyses to detect PAHs in 12 species and observed a contamination profile dominated by light PAHs, consistent with previous oil spill events. We also found higher PAH concentrations in invertebrates compared to vertebrates, corroborating the susceptibility of mollusks and crustaceans to contaminants. Chapter II focuses on stomach content analyses and histopathological assessments of tissues from 11 fish species. As results, we detected oil presence in 11 individuals (≈5%) and tissue damage alone in 4 individuals (≈3%) of the fish examined. The study provides a detailed view of contamination and impacts on species following the 2019 disaster and analyzes the relationship between their ecological traits and vulnerability to PAH contamination.

COMMITTEE MEMBERS:
Externo à Instituição - ARTHUR DE BARROS BAUER
Presidente - 1378974 - LIANA DE FIGUEIREDO MENDES
Externo à Instituição - RUY KENJI PAPA DE KIKUCHI - UFSB