Banca de QUALIFICAÇÃO: ALANY ITALA PONTES NASCIMENTO

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : ALANY ITALA PONTES NASCIMENTO
DATE: 11/02/2022
TIME: 09:00
LOCAL: ICBS
TITLE:

Phylogenetics and phylogeography analysis reveal the central influence of the Pleistocene on the evolutionary diversification of Lycengraulis grossidens (Clupeiformes, Clupeidae) in the Western Atlantic

 

KEY WORDS:

Biogeography, Genetic Structuring, Enigmatic Lineages, Paleodrains, Climate Fluctuation, Dispersion Dynamics

PAGES: 36
BIG AREA: Ciências Biológicas
AREA: Genética
SUBÁREA: Genética Animal
SUMMARY:

 

The continental shelf of South America was exposed in different ways to eustatic and isostatic changes during the Quaternary, modifying its physiography, forming paleodrains that culminated in connectivity between rivers and/or isolation in the past, consequently affecting the distribution of aquatic organisms. To assess these historical Pleistocene effects, widely distributed species that inhabit marine and estuarine environments are excellent predictors, especially when evaluating their levels of genetic diversity. In the present work, we analysed the genetic and phylogenetic diversity of L. grossidens, a plastic species widely distributed in South America. For this, we used two genes, one mitochondrial (COI) and one nuclear (Rhodopsin). Our analyses were congruent, detecting the presence of three lineages that diversified during the Pleistocene glacial and interglacial ages. Being a distributed from the extreme south that diverged about 400 thousand years; a coastal lineage widely distributed from northern to southeastern Brazil; and another lineage that diverged more recently 77,000 years ago, more restricted, occurring in the lower São Francisco River region in northeastern Brazil (RSF), but which is in sympatry with the widely distributed coastal population. All these processes highlight the evolutionary routes that L. grossidens experienced during its diversification,  provided by geomorphological and thermal processes during the Pleistocene, culminating in deep genetic signatures with enigmatic lineages throughout its distribution.

BANKING MEMBERS:
Presidente - 2265276 - UEDSON PEREIRA JACOBINA
Interna - 1714987 - TAMI MOTT
Externo à Instituição - LUIS GUSTAVO RODRIGUES SOUZA - UFPE
Externo à Instituição - SILVIA BRITTO BARRETO - UFPA