A5011098981- Evolution and Paleontology Studies
- Genetic diversity and population structure
- Animal Ecology and Behavior Studies
- Bat Biology and Ecology Studies
- Wildlife Ecology and Conservation
- Genomics and Phylogenetic Studies
- Viral Infections and Vectors
- Chromosomal and Genetic Variations
- Parasite Biology and Host Interactions
- Yersinia bacterium, plague, ectoparasites research
- Species Distribution and Climate Change
- Mosquito-borne diseases and control
- Fish biology, ecology, and behavior
- Identification and Quantification in Food
- Pleistocene-Era Hominins and Archaeology
- Vector-borne infectious diseases
- Genetic Mapping and Diversity in Plants and Animals
- Insect symbiosis and bacterial influences
- Antibiotic Resistance in Bacteria
- Primate Behavior and Ecology
- Viral Infections and Outbreaks Research
- Marine animal studies overview
- Amphibian and Reptile Biology
- Paleontology and Evolutionary Biology
- Mollusks and Parasites Studies
Université de Montpellier
2013-2024
Centre National de la Recherche Scientifique
2012-2024
Institut des Sciences de l'Evolution de Montpellier
2015-2024
Institut de Recherche pour le Développement
2011-2024
École Pratique des Hautes Études
2018
Institut Pasteur de la Guyane
2014
University of French Guiana
2014
Maladies Infectieuses et Vecteurs: Écologie, Génétique, Évolution et Contrôle
2012
Institut Curie
2009
University of Lausanne
1986-2009
The Black Rat (Rattus rattus) spread out of Asia to become one the world's worst agricultural and urban pests, a reservoir or vector numerous zoonotic diseases, including devastating plague. Despite global scale inestimable cost their impacts on both human livelihoods natural ecosystems, little is known genetic diversity Rats, timing directions historical dispersals, risks associated with contemporary movements. We surveyed mitochondrial DNA Rats collected across range as first step towards...
Rodentia is the largest order of placental mammals, with approximately 2,050 species divided into 28 families. It also one most controversial respect to its monophyly, relationships between families, and divergence dates. Here, we have analyzed compared performance three nuclear genes (von Willebrand Factor, interphotoreceptor retinoid-binding protein, Alpha 2B adrenergic receptor) for a large taxonomic sampling, covering whole rodent diversity. The phylogenetic results significantly support...
A data set of complete mitochondrial cytochrome b and 12S rDNA sequences is presented here for 17 representatives Artiodactyla Cetacea, together with potential outgroups (two Perissodactyla, two Carnivora, Tethytheria, four Rodentia, Marsupialia). We include seven not previously published from Hippopotamidae (Ancodonta) Camelidae (Tylopoda), yielding a total nearly 2.1 kb both genes combined. Distance parsimony analyses each gene indicate that 11 clades are well supported, including the...
Within the subfamily Murinae, African murines represent 25% of species biodiversity, making this group ideal for detailed studies patterns and timing diversification endemic fauna its relationships with Asia. Here we report results phylogenetic analyses through a broad sampling murine diversity from all their distribution area, based on mitochondrial cytochrome b gene two nuclear fragments (IRBP exon 1 GHR).A combined analysis one sequences consistently identified robustly supported ten...
Extant xenarthrans (armadillos, anteaters and sloths) are among the most derived placental mammals ever evolved. South America was cradle of their evolutionary history. During Tertiary, experienced an extraordinary radiation, whereas remained isolated from other continents. The 13 living genera relicts this earlier diversification represent one four major clades mammals. Sequences three independent protein-coding nuclear markers α2B adrenergic receptor (ADRA2B), breast cancer susceptibility...
In this paper, we present data on murid rodents obtained by three major techniques used in biochemical systematics today: protein electrophoresis, scnDNA hybridization and mtDNA RFLP. The have been analysed both phenetic cladistic methods results of the were compared with one another. Four clear levels divergence (or nodes) can be recognized all methods. Node 1 groups four subspecies M. musculus (domesticus, bactrianus, castaneus musculus). 2 species: musculus, spretus, spicilegus...
Significance Syncytins are “captured” genes of retroviral origin, corresponding to the fusogenic envelope gene endogenized retroviruses. They present in a series eutherian mammals, including humans and mice where they play an essential role placentation. Here we show that marsupials—which diverged from mammals ∼190 Mya but still possess primitive, short-lived placenta (rapidly left by embryo for development external pouch)—have also captured such genes. The characterization syncytin-Opo1...
Phylogenetic relationships between 32 species of rodents representing 14 subfamilies Muridae and four Dipodidae were studied using sequences the nuclear protein-coding genes Lecithin Cholesterol Acyl Transferase (LCAT) von Willebrand Factor (vWF). An examination some evolutionary properties each data matrix indicates that two are rather complementary, with lower rates nonsynonymous substitutions for LCAT. Both markers exhibit a wide range GC3 percentages (55%–89%), several taxa above 70%...
Although the Sahara is a major geographical feature of African continent, its role in diversification animal species not well understood. We present here molecular phylogeny for members endemic mammalian order Macroscelidea (elephant shrews) with molecular-clock calculations; this provides convincing evidence that genus Elephantulus diphyletic. rozeti , only elephant shrew resides north Sahara, sister group from different ( Petrodromus tetradactylus ), which just south Sahara. The split...
Single-copy nuclear DNAs (scnDNAs) of eight species arvicoline and six murine rodents were compared using DNA-DNA hybridization. The branching pattern derived from the DNA comparisons is congruent with fossil evidence supported by comparative biochemical, chromosomal, morphological studies. recently improved record for these lineages provides seven approximate divergence dates, which used to calibrate DNA-hybridization data. average rate scnDNA was estimated as 2.5%/Myr. This approximately...
In South America, dengue is the arbovirus-transmitted disease with highest incidence. Unlike other arboviruses, wild mammals have no confirmed role in cycle of neotropics, although serological studies suggested a possible secondary amplification involving than nonhuman primates. French Guiana, where all four serotypes (DENV-1, DENV-2, DENV-3, DENV-4) are present, endemic outbreak events. To determine whether can be infected by DENV, rodents, marsupials, and bats were captured over several...
In industrialized countries Candida albicans is considered the predominant commensal yeast of human intestine, with approximately 40% prevalence in healthy adults. We discovered a highly original colonization pattern that challenges this current perception by studying 4- year interval cohort 151 Amerindians living remote community (French Guiana), and animals from their environment. The C. was persistently low (3% 7% carriers). By contrast, krusei Saccharomyces cerevisiae were detected over...
We undertook a large-scale epidemiological survey of commensal Escherichia coli in Trois-Sauts, an isolated village located the south French Guiana where human population exchanges are restricted and source antibiotics controlled. Stools from 162 Wayampi Amerindians rectal swabs 33 associated 198 wild animals were collected close proximity village. The prevalence E. was decreasing humans (100%) to (64%) (45%) animals. A clear genetic structure between these three populations observed with...
Myotis albescens occurs from Mexico southward to Uruguay and Argentina. The species is known for all South American countries except French Guiana Chile.Based on one specimen recently collected in we fill part of the gap distribution America. Shield with other four congeners, which it can be distinguished by external skull traits. As an aid future identifications, provide a key this assemblage.
In the current context of global change and human-induced biodiversity decline, there is an urgent need for developing sampling approaches able to accurately describe state biodiversity. Traditional surveys vertebrate fauna involve time-consuming skill-demanding field methods. Recently, use DNA derived from invertebrate parasites (leeches blowflies) was suggested as a new tool diversity assessment. Bloodmeal analyses arthropod disease vectors have long been performed their feeding behaviour,...
Abstract Tick-borne bacteria of the genera Ehrlichia and Anaplasma cause several emerging human infectious diseases worldwide. In this study, we conduct an extensive survey for infections in rainforests Amazon biome French Guiana. Through molecular genetics metagenomics reconstruction, observe a high indigenous biodiversity circulating among humans, wildlife, ticks inhabiting these ecosystems. Molecular typing identifies as highly endemic, with majority new strains putative species specific...
The von Willebrand factor (vWF) gene has been used to understand the origin and timing of Rodentia evolution in context placental phylogeny. vWF exon 28 sequences 15 rodent families eight non–rodent eutherian clades are analysed with two different molecular dating methods (uniform clock on a linearized tree; quartet dating). Three main conclusions drawn from study this nuclear exon. First, Ctenodactylidae (gundis) Hystricognathi (e.g. porcupines, guinea–pigs, chinchillas) robustly cluster...
Spiny mice of the genus Acomys traditionally have been classified as members Murinae, a subfamily rodents that also includes rats and with which spiny share complex set morphological characters, including unique molar pattern. The origin evolution this pattern, documented by many fossils from Southern Asia, support hypothesis monophyly all other Murinae. This view has challenged immunological studies suggested is distantly related to (Mus) are subfamilies (e.g., hamsters: Cricetinae) muroid...
Abstract A molecular phylogeny based on DNA/DNA hybridization revealed that the Sylvia‐Parisoma complex is monophyletic and includes three main groups of species, “mid‐European” warblers, genus Parisoma , “eu‐Mediterranean” Sylvia species sensu stricto . The latter can be assigned to clusters, a “West‐Mediterranean” group, “Central‐Mediterranean group”, an “East‐Mediterranean” group. radiation whole much more ancient than formerly believed. It started ca 12–13 Ma ago ancestors extant...
Significance Syncytins are genes of retroviral origin that have been captured by their host as symbionts for a function in placentation. They can mediate cell–cell fusion, consistent with ancestral envelope gene status, and involved fusion mononucleate trophoblast cells to form the syncytial layer—the syncytiotrophoblast—of feto–maternal interface. We proposed such pivotal emergence placental mammals from egg-laying animals should be present all along Placentalia radiation. searched...