Banca de QUALIFICAÇÃO: DANIEL SOLON DIAS DE FARIAS

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
STUDENT : DANIEL SOLON DIAS DE FARIAS
DATE: 24/09/2021
TIME: 14:00
LOCAL: Vídeo Conferência
TITLE:

THREATENED GREEN TURTLES IN THE POTIGUAR BASIN, NORTHEAST, BRAZIL: PERSPECTIVES FOR CONSERVATION

KEY WORDS:

Chelonia mydas; marine pollution; ecotoxicology; anthropogenic debris; population genetics.

PAGES: 110
BIG AREA: Outra
AREA: Ciências Ambientais
SUMMARY:

The high annual stranding rates of green turtles (Chelonia mydas) recorded in recent years in Brazil, and more specifically in the Potiguar Basin region, bring to light the need to understand the presence of the species in the region, as well as its main threats. In this sense, this study aimed to analyse the pattern of occurrence of the green turtle in the Potiguar Basin, a region between the northern coast of Rio Grande do Norte (RN) and east of Ceará (CE), characterizing the population species stocks, as well as assess the impact of solid waste and the bioaccumulation of chemical elements in the tissues of specimens found stranded in the region. The evaluation of contamination by chemical elements (THg, Cu, Cd, Ag and Se) in tissues (liver, muscle and kidneys) of green turtles revealed levels of contamination, still unknown for these animals in the Potiguar Basin, reinforcing the role of sea turtles as sentinels of the quality of the marine ecosystem. Through the adaptation of a tool used for diet analysis, the Food Index (IAi), it was possible to assess the impact of anthropogenic debris, especially transparent flexible plastic on juvenile turtles (JUV-I), which is associated with coastal eating habits and on the surface of the species, where the highest concentrations of plastic fragments occur, associated with floating algae. The analysis of the genetic composition showed a variety of haplotypes, with a predominance of the two most registered on the western South Atlantic coast (CM-A8 and CM-A5). Our findings increase the understanding of the composition of C.mydas population stocks on the Brazilian coast, which, together with the diagnosis of impacts caused by anthropogenic contaminants and debris, especially in less studied areas, such as green turtle feeding sites, contribute to a greater organization of nesting areas recomposition strategies, with consequent improvement in the species' threat status in Brazil and in the world.

BANKING MEMBERS:
Externo à Instituição - GERALDO JORGE BARBOSA DE MOURA - UFRPE
Interno - 707.819.324-59 - JULIO ALEJANDRO NAVONI - UFRN
Externa ao Programa - 1672446 - SIMONE ALMEIDA GAVILAN
Presidente - 1674709 - VIVIANE SOUZA DO AMARAL