A5075117545- Chromosomal and Genetic Variations
- Genomics and Phylogenetic Studies
- Genetic diversity and population structure
- Fish biology, ecology, and behavior
- Evolution and Paleontology Studies
- Bat Biology and Ecology Studies
- CRISPR and Genetic Engineering
- Animal Genetics and Reproduction
- Primate Behavior and Ecology
- Genetic Mapping and Diversity in Plants and Animals
- Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
- Fish Biology and Ecology Studies
- Genomic variations and chromosomal abnormalities
- Phytochemistry Medicinal Plant Applications
- Amphibian and Reptile Biology
- Carcinogens and Genotoxicity Assessment
- Genomics and Chromatin Dynamics
- Turtle Biology and Conservation
- Plant Virus Research Studies
- Animal Ecology and Behavior Studies
- Avian ecology and behavior
- Reproductive Biology and Fertility
- Wildlife Ecology and Conservation
- Environmental Toxicology and Ecotoxicology
- Bioactive Compounds and Antitumor Agents
Universidade Federal do Pará
2016-2025
Instituto Sócioambiental
2023
National Council for Scientific and Technological Development
2006-2023
Universidade Federal Rural da Amazônia
2023
Universidade Federal do Maranhão
2010-2012
PharmacoGenetics (China)
2010
University of Cambridge
2008-2010
Genomics (United Kingdom)
2010
Weatherford College
2006
Universidade Federal do Rio Grande do Sul
1994-1999
Malachite green (MG) is a synthetic dye that uses ranges from its application as tissue to an antiparasitic in aquaculture. Several studies have reported the presence of this compound food dyes and meat fish raised captivity for human consumption, suggesting risks both end user those who handle these products because MG toxic properties described literature. Here we evaluated cytotoxic genotoxic profiles four different cell lines (ACP02, L929, MNP01, MRC-5). Two are stomach cells (normal...
Oecomys (Rodentia, Sigmodontinae, Oryzomyini) is a taxonomically complex and cytogenetically diverse genus with controversial intraspecific phylogenetic relationship. Karyotypic analyses, using whole chromosome probes from Hylaeamys megacephalus (HME, in some taxonomic lineages of this have detected the rearrangements that shaped their karyotypes, addition to revealing relevant insights into status these taxa. Thus, investigate chromosomal evolution genus, we characterized karyotype rutilus...
In this study we examined the karyotypes of morphologically indistinguishable populations electric knifefish Gymnotus carapo sensu stricto from Eastern Amazon Brazil. These were identified unambiguously on basis external morphology, meristics, and pigmentation.Specimens one five localities exhibited a karyotype previously not documented for species in basin: 2n = 40 (34M/SM+6ST/A). Samples other four different karyotype: 42 (30M/SM+12ST/A), which had described. Specimens all presented...
Gymnotus (Gymnotidae, Gymnotiformes) is the Neotropical electric fish genus with largest geographic distribution and number of species, 33 which have been validated. The diploid varies from 2n = 39-40 to 54. Recently we studied karyotype morphologically indistinguishable samples five populations G. carapo sensu stricto Eastern Amazon Brazil. We found two cytotypes, 42 (30 M/SM + 12 ST/A) 40 (34 6 concluded that differences between cryptic species are due pericentric inversions one tandem...
Andirobeira is an Amazonian tree, the seeds of which produce a commercially valuable oil that used in folk medicine and cosmetic industry. Andiroba contains components with anti-inflammatory, cicatrizing insect-repellant actions. However, virtually nothing known safety this for humans. The aim work was therefore to investigate hematotoxicity, genotoxicity mutagenicity andiroba using comet micronucleus assays, assess its antioxidant properties lipidome as means addressing issues. For...
Dendropsophini is the most species-rich tribe within Hylidae with 234 described species. Although cytogenetic information sparse, chromosome numbers and morphology have been considered as an important character system for systematic inferences in this group. Using a diversity of standard molecular techniques, we describe previously unknown karyotypes genera <i>Xenohyla</i>, <i>Scarthyla</i> <i>Sphaenorhynchus</i> provide new on...
Andiroba oil (AO) is obtained from an Amazonian plant and used in traditional medicine. We carried out a comparative study to test the cytotoxicity, genotoxicity, hematotoxicity of its nanoemulsion (AN) vitro (fibroblasts, lineage NIH/3T3) vivo (Swiss mice). The AN was characterized by DLS/Zeta, stability investigated for 120 days. biological activity assessed MTT cell morphology analyses micronucleus, comet, tests. presented hydrodynamic diameter (Hd) <mml:math...
Holocentric chromosomes occur in approximately 750 species of eukaryotes. Among them, the genus Tityus (Scorpiones, Buthidae) has a labile karyotype that shows complex multivalent associations during male meiosis. Thus, taking advantage excellent model provided by Buthidae scorpions, here we analyzed chromosomal distribution several repetitive DNA classes on holocentric different populations obscurus Gervais, 1843, highlighting their involvement karyotypic differences found among them.This...
Abstract Background Cytogenetic studies were carried out on samples of Eigenmannia virescens (Sternopygidae, Gymnotiformes) obtained from four river systems the Eastern Amazon region (Para, Brazil). Results All populations had 2n = 38, with ZZ/ZW sex chromosomes (Z, acrocentric; W, submetacentric). Constitutive heterochromatin (CH) was found at centromeric regions all chromosomes. The W chromosome a heterochromatic block in proximal short arm; this CH positive for DAPI staining, indicating...
Abstract Background Chromosomal painting, using whole chromosome probes from humans and Saguinus oedipus , was used to establish karyotypic divergence among species of the genus Cebus including C. olivaceus albifrons apella robustus paraguayanus . Cytogenetic studies suggested that this have conservative karyotypes, with diploid numbers ranging 2n = 52 54. Results Banding revealed morphological some chromosomes, owing variations in size heterochromatic blocks. This analysis demonstrated five...
Gymnotus capanema n. sp. is described on the basis of cytogenetic, morphometric, meristic and osteological data from nine specimens (one male eight females) municipality Capanema, Pará, in eastern Amazon Brazil. Later, three additional were found museums regarded as nontypes (not cytogenetically analysed). , which occurs sympatry with cf. carapo cytotype 2 n = 42 (30m/sm + 12st/a) exhibits a novel karyotype for genus, 34 (20m/sm 14st/a). can be unambiguously diagnosed all congeners...
The hylid tribe Cophomantini is a diverse clade of Neotropical treefrogs composed the genera Aplastodiscus, Boana, Bokermannohyla, Hyloscirtus, and Myersiohyla. phylogenetic relationships have been comprehensively reviewed in literature, providing suitable framework for study chromosome evolution. Employing different banding techniques, we studied chromosomes 25 species Boana 3 Hyloscirtus; thus providing, first time, data Hyloscirtus 15 Boana. Most showed karyotypes with 2n = 2x 24...
Gymnotus (Gymnotiformes, Gymnotidae) is the most diverse known Neotropical electric knife fish genus. Cytogenetic studies in demonstrate a huge karyotypic diversity for this genus, with diploid numbers ranging from 34 to 54. The NOR are also variable both single and multiple NORs described. A common interpretation that pair primitive trait while derivative. However hypothesis has never been fully tested. In report we checked if NOR-bearing chromosome rDNA site homeologous different species...
The spiny rats of the genus <i>Proechimys</i> have a wide distribution in Amazon, covering all areas endemism this region. We analyzed karyotype and cytochrome b <i>(Cyt b)</i> sequences <i>Proechimys goeldii </i>from 6 localities representing 3 interfluves eastern Amazon. A clear separation <i>P. goeldii</i> into 2 monophyletic clades was observed, both chromosomally based on <i>Cyt b</i> sequences: cytotype (2n =...
The Neacomys genus (Rodentia, Sigmodontinae) is distributed in the Amazon region, with some species limited to a single endemic area, while others may occur more widely. number of within and their geographical boundaries are not known accurately, due high genetic diversity difficulties taxonomic identification. In this work we collected specimens from both banks Tapajós River eastern Amazon, studied them using chromosome painting whole probes Hylaeamys megacephalus (HME; Rodentia,...