Banca de QUALIFICAÇÃO: LAYANE JOYCE ROSA MAIA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : LAYANE JOYCE ROSA MAIA
DATE: 13/11/2024
TIME: 14:00
LOCAL: LABORATÓRIO DE HISTOLOGIA E EMBRIOLOGIA ANIMAL
TITLE:

CETACEANS: AQUATIC SENTINELS IN A ONE HEALTH STUDY

KEY WORDS:

Cetaceans; One health; Contaminants; Metals; Scientific dissemination.

PAGES: 45
BIG AREA: Ciências Biológicas
AREA: Bioquímica
SUBÁREA: Metabolismo e Bioenergética
SUMMARY:

Cetaceans, a group that includes whales, dolphins, and manatees, are mammals that have evolved with adaptations to the aquatic environment. Distributed across the globe, from the Arctic oceans to the tropics, these animals play important ecological roles, such as nutrient cycling. However, this group faces various pressures, including marine pollution (both sound and chemical pollution), predatory fishing, and climate change, which have both direct and indirect effects. Due to their position at the top of the food chain, along with their long lifespan and lipid-rich adipose tissue, cetaceans are subject to bioaccumulation and biomagnification of contaminants, making them excellent environmental indicators. Therefore, toxicological studies on high concentrations of persistent organic pollutants (POPs) and metals are crucial for understanding environmental health. Moreover, due to their high toxicity potential, these compounds can act as endocrine disruptors, interfering with endogenous steroid hormones. Some POPs and their metabolites share structural similarities with endogenous hormones and can interact with hormone transport proteins or disrupt endocrine metabolism, mimicking or interfering with the activity of endogenous hormones. Thus, research that investigates cetacean health and welfare through physiological, hormonal, and behavioral parameters, in relation to environmental factors, particularly the HPA axis, is important. This axis is the main physiological indicator of animal welfare, as a hormonal cascade can be activated by physical and mental stressors. Measuring and interpreting these responses in cetaceans in their natural environment is a developing field, due to the need to validate non-invasive hormone measurement methods and avoid stress to the animals during sample collection. This research proposal aims to investigate cetaceans as sentinels of aquatic environments from a One Health approach. The study will assess contamination by trace and heavy metals in the species Sotalia guianensis, with samples from the northern coast of Pará and the Lagos Region in Rio de Janeiro. Additionally, the research will seek to identify knowledge gaps for future studies within the One Health perspective and develop an action plan for using cetaceans as a didactic and pedagogical model in teaching One Health.

COMMITTEE MEMBERS:
Presidente - 2313941 - ELANE GUERREIRO GIESE
Interna - 1733442 - ANA RITA DE LIMA
Externo ao Programa - 3100340 - RAUL HENRIQUE DA SILVA PINHEIRO - UFRAExterna à Instituição - ELAINE LOPES DE CARVALHO
Externa à Instituição - LÍLIAN LUND AMADO
Externa à Instituição - NEUSA RENATA EMIN DE LIMA - UFPA
Externo à Instituição - SALVATORE SICILIANO - Fiocruz - RJ