Banca de DEFESA: JÉSSICA FERREIRA DE SOUZA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
STUDENT : JÉSSICA FERREIRA DE SOUZA
DATE: 29/07/2024
TIME: 09:00
LOCAL: videoconferência
TITLE:

 

BETWEEN PROTECTION AND THREAT: EFFECTS OF EXPOSURE TO THE OXYBENZONE UV FILTER ON MAGIC FISH (Stegastes fuscus)

KEY WORDS:

UV filter; behavior; aggressiveness; anxiety; apprenticeship; cognitive flexibility, reef fish

PAGES: 100
BIG AREA: Ciências Humanas
AREA: Psicologia
SUMMARY:

Oxybenzone (benzophenone-3 or BP-3) is one of the most used ultraviolet filters in the manufacture of personal care products, such as sunscreens, as well as in the plastic, food and textile industries. Due to its widespread use in various areas, this compound continuously arrives in aquatic environments, especially marine sites, directly or indirectly, where it can undergo bioaccumulation and biomagnification processes in aquatic biota. Studies have shown the harmful effects of exposure to BP-3 on several aquatic organisms, especially fish. However, few studies focus their efforts on understanding how oxybenzone impacts reef fish, which are affected daily by continuous discharges of this pollutant. Therefore, this study aimed to investigate the toxicological effects of BP-3 ingestion on damselfish fish Stegastes fuscus. For this, the animals were exposed to BP-3 through the diet and were evaluated using a multilevel approach, involving behavioral, cognitive and physiological responses. After 30 days of exposure, we evaluated the consequences of BP-3 on health indicators (growth rate and hepatosomatic index), risk-taking, anxious-type and aggressive behaviors, as well as its effects on the enzymatic activity of the oxidative defense system and biomarkers of neurotoxicity in the brain and liver (CAT, GST, LDH and AChE; chapter 1). In a second exposure to the compound, after 60 days, we investigated the effects of BP-3 on a motivation test through a detour task, evaluating the effects of this pollutant on the motivation of damselfish fish (chapter 2). In general, animals exposed to BP-3 showed impairments in health indicators, locomotion and risk-taking behavior. Furthermore, there were changes in enzymatic activity, with different responses between the tissues analyzed. Regarding cognition, no effects of BP-3 were observed on the animals' motivation during the detour test. It is crucial to understand the effects of UV filters, especially BP-3, not only to assess their environmental and health impacts, but also to guide management policies and develop safer and more sustainable alternatives for sun protection and other industrial applications.

COMMITTEE MEMBERS:
Presidente - 1644341 - ANA CAROLINA LUCHIARI
Externo à Instituição - DAVI FELIPE FARIAS
Externa à Instituição - MARTA CANDEIAS SOARES - UNIPORTO