Banca de DEFESA: MARIANA DE SOUZA OLIVEIRA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
STUDENT : MARIANA DE SOUZA OLIVEIRA
DATE: 15/09/2021
TIME: 08:00
LOCAL: on-line
TITLE:

Taxonomy and ecology of coccidians: Isospora spp. and Eimeria spp. of wild birds from Brazil and Portugal

KEY WORDS:
PAGES: 132
BIG AREA: Ciências Biológicas
AREA: Zoologia
SUBÁREA: Zoologia Aplicada
SUMMARY:

Brazil is among the most biodiverse countries in the world, and this biodiversity is
evaluated by the size of its territory, transformed, a large amount of endemic species, making it
important for investments in bird conservation. Birds are animals of great ecological importance,
essential for the maintenance of balance, acting as seed dispersers, pollinating agents, prey
regulators and, most importantly, being conservation bioindicators, as they are animals known
for their sensitivity to changes in habitats. The main factors related to the extinction of wild
species are the degradation of natural environments, introduction of exotic species, caused by
overexploitation by humans, impacting not only the fauna, but also the flora and microbiota, 

and indirectly favoring the appearance and transmission of parasitic diseases. Parasites can play
a major role in maintaining this biodiversity, through the maintenance of diversities in ecological
communities, thus acting as key-species for this purpose. However, they can also cause decline
in natural populations, decreasing so much the level of reproduction of their hosts. Among the
different types of parasites, coccidia in birds stand out, they are predominantly intestinal
intracellular protozoa, revealing fundamental importance, especially in anthropogenic
environments, as birds stressed by human impacts tend to be more susceptible to infection and
colonization of coccidia. Thus, coccidia play the role of biomarkers of environmental impacts.
Coccidia fit into a diverse and complex group of parasites, highlighting the genera of Isospora
Schneider, 1881 e Eimeria Schneider, 1875, which are of greater relevance for parasites of birds
of the Passeriformes and Columbiformes orders. In this context, the objective was to analyze
feces of wild birds captured in areas of the Atlantic Forest, Parque Nacional do Itatiaia, Parque
Nacional da Serra dos Órgãos, preservation and reforestation area of the Instituto Federal de
Pinheiral and in the District of Cacaria, Rio de Janeiro, in addition to the feces presented from
Portugal, to identify and quantify coccidian parasites present. After the morphological analysis
of the found oocysts, molecular analyzes were settled in the viable ones, working on DNA
sequence analysis of COI and 18S genes, in addition to phylogenetic analysis. As a result we
obtained five articles, three articles with records of new species, one Isospora sp. and two
Eimeria spp., a redescription article of an Isospora sp. with new hosts, and an article with
redescription of an Eimeria sp. in birds from Portugal.

BANKING MEMBERS:
Interno - 1971595 - BRUNO PEREIRA BERTO
Externo ao Programa - 387289 - ILDEMAR FERREIRA
Externa ao Programa - 1764496 - VIVIANE MOREIRA DE LIMA
Externa ao Programa - 4073611 - AGUIDA APARECIDA DE OLIVEIRA
Externo à Instituição - HERMES RIBEIRO LUZ - UFMA
Externo à Instituição - LÚCIO ANDRÉ VIANA DIAS - UNIFAP
Externo à Instituição - SERGIAN VIANNA CARDOZO - Unigranrio