Banca de DEFESA: NARAIANA LOPES TABORDA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : NARAIANA LOPES TABORDA
DATE: 27/08/2020
TIME: 09:00
LOCAL: Plataforma Google Meet
TITLE:

Biodiversity of Diplostomoidea (Trematoda: Digenea: Diplostomida) in freshwater fish in Brasil: an integrative approach.

KEY WORDS:

Diplostomoidea; host-parasite associations; integrative taxonomy;

PAGES: 153
BIG AREA: Ciências Agrárias
AREA: Medicina Veterinária
SUMMARY:

The present study uses an integrative approach to understanding the diverity of diplostomoids in Brazil. The survey has been carried out on freshwater fish fauna of the Amazon, Pantanal and Mata Atlantica; sampling from 11 freshwater habitats and inventoring a total of 1,140 fishes of 27 families. This ambitious project aimed at revealing a large amount of novel biodiverity from Brazil and shedding light on the complex links between hosts and parasites. The lack of baselines and notoriously difficult identification of the metacercarial larval stages represented the main challenge accomplishing the present work. In the course of the stduy we profit from
the opportunity to obtain material from reptile and bird definitive hosts which enable partial life-cycle elusidation of one proterodiplostomid (Prolecithodiplostomum constrictum Dubois, 1936) and three new species of Posthodiplostomum Dubois, 1936. Overall, the rich material collected resulted in development of an integrated morphological, molecular and distributional framework to the identification of fish larval parasites as an important componenet in the freshwater ecosystem. This has led to generating large sequence libraries (linking sequences for the mitochondrial cythochrom c oxidase subunit 1 gene and the nuclear 28S rDNA) for the South American diplostomoid which were virtually missing and will serve as a base for future diversity assessmnets. The generated morphological and sequence reference libraries substantially complemented the existing ones on the the group from North America, Europe and Africa. Results are summarised in two chapters focused on: (i) roterodiplostomid diversity in the Brasilian freshwater reporting on eight speies of which six putative new and further providing an improved resolution on the Diplostomoidea, and re-validation of the metacercarial systematics on the group; and (ii) black-sprot disease pathogens in fishes providing data for two species recovered in fish and bird hosts, and highlighting the importance of the use of an intergrative approach for species identification linking different lines of evicence gathered from morphology, molecular and parasites’ biology. Therefore, the results are discussed in terms of species diversity and diverisification processes, endemism, host-parasite associations and transmission strategies. The present study emphasizes the need to further our knowledge not only on the Neotropical trematode parasite diversity but this at global.

BANKING MEMBERS:
Externo à Instituição - CLAUDIA PORTES SANTOS SILVA - FIOCRUZ
Externo à Instituição - DIMITRI RAMOS ALVES - UNIFOA
Interno - 1173660 - FABIO BARBOUR SCOTT
Presidente - 2242796 - JOSE LUIS FERNANDO LUQUE ALEJOS
Externa ao Programa - 3092534 - RAQUEL DE OLIVEIRA SIMOES