A5078418878- Morphological variations and asymmetry
- Plant and animal studies
- Animal Behavior and Reproduction
- Insect and Arachnid Ecology and Behavior
- Insect behavior and control techniques
- Ecology and Vegetation Dynamics Studies
- Evolution and Paleontology Studies
- Genetic diversity and population structure
- Lepidoptera: Biology and Taxonomy
- Physiological and biochemical adaptations
- Insect-Plant Interactions and Control
- Species Distribution and Climate Change
- Forest Insect Ecology and Management
- Genetic and phenotypic traits in livestock
- Pleistocene-Era Hominins and Archaeology
- Insect Utilization and Effects
- Neurobiology and Insect Physiology Research
- Amphibian and Reptile Biology
- Marine and environmental studies
- Insect Pest Control Strategies
- Genetics, Aging, and Longevity in Model Organisms
- Spaceflight effects on biology
- Biomimetic flight and propulsion mechanisms
- Botanical Studies and Applications
- Environmental and Biological Research in Conflict Zones
Institut de Systématique, Évolution, Biodiversité
2015-2025
Centre National de la Recherche Scientifique
2015-2025
Inserm
2024-2025
Collège de France
2024-2025
Centre Interdisciplinaire de Recherche en Biologie
2024-2025
École Pratique des Hautes Études
2015-2024
Sorbonne Université
2015-2024
Université des Antilles
2019-2024
Muséum national d'Histoire naturelle
2010-2021
Google (United States)
2020
Summary According to their geographical distribution, most Drosophila species may be classified as either temperate or tropical, and this pattern is assumed reflect differences in thermal adaptation, especially cold tolerance. We investigated tolerance a global collection of D. melanogaster by monitoring the time adults take recover from chill coma after treatment at 0 °C. Flies grown an intermediate temperature (21 °C) showed significant linear latitudinal cline: recovery was faster...
Deciphering invasion routes from molecular data is crucial to understanding biological invasions, including identifying bottlenecks in population size and admixture among distinct populations. Here, we unravel the of invasive pest Drosophila suzukii using a multi-locus microsatellite dataset (25 loci on 23 worldwide sampling locations). To do this, use approximate Bayesian computation (ABC), which has improved reconstruction routes, but can be computationally expensive. We our study...
The phenotypic effects of genetic and environmental manipulations have been rarely investigated simultaneously. In addition to plasticity, their effect on the amount directions variation is particular evolutionary importance because these constitute material for natural selection. Here, we used heterozygous insertional mutations 16 genes involved in formation Drosophila wing. flies were raised at two developmental temperatures (18°C 28°C). Landmark-based geometric morphometrics was analyze...
The relationship between the two components of developmental homeostasis, that is canalization and stability (DS), currently debated. To appraise this relationship, levels morphological patterns interindividual variation fluctuating asymmetry were assessed using a geometric morphometric approach applied to skulls laboratory samples house mouse. These three correspond random–bred strains European subspecies mouse their F1 hybrids. inter– intraindividual found be smaller in hybrid group...
Phenotypic plasticity of wing size and shape Drosophila simulans was analyzed across the entire range viable developmental temperatures with Procrustes geometric morphometric method. In agreement previous studies, clearly decreases when temperature increases. Wing variation decomposed into its allometric (24%) nonallometric (76%) components, both were shown to involve landmarks located throughout blade. The component basically revealed a progressive, monotonous along temperature....
The role of developmental and genetic integration for evolution is contentious. One hypothesis states that acts as a constraint on evolution, whereas an alternative systems evolve to match the functional modularity organisms. This study examined morphological structure, cricket wing, where modules are discordant, making it possible distinguish two alternatives. Wing shape was characterized with geometric morphometrics, quantitative information extracted using full-sibling breeding design,...
Butterfly wings harbor highly diverse phenotypes and are involved in many functions. Wing size shape result from interactions between adaptive processes, phylogenetic history, developmental constraints, which complex to disentangle. Here, we focus on the genus Morpho (Nymphalidae: Satyrinae, 30 species), presents a high diversity of sizes, shapes, color patterns. First, generate comprehensive molecular phylogeny these species. Next, using 911 collection specimens, quantify variation wing...
ABSTRACT Phenotypic plasticity has been proposed as a mechanism that facilitates the success of biological invasions. In order to test hypothesis an adaptive role for in invasions, particular attention should be paid relationship between focal plastic trait, environmental stimulus and functional importance trait. The Drosophila wing is particularly amenable experimental studies phenotypic plasticity. Wing morphology known its variation under different temperatures, but this rarely...
Abstract Human activities can generate a wide variety of direct and indirect effects on animals, which manifest as environmental genetic stressors. Several phenotypic markers have been proposed indicators these stressful conditions but displayed contrasting results, depending, among others, the trait measured. Knowing worldwide decline multiple bumblebee species, it is important to understand stressors link them with drivers decline. We assessed impact several (i.e. natural toxin-,...
Morphological consistency in metazoans is remarkable given the pervasive occurrence of genetic variation, environmental effects, and developmental noise. Developmental stability, ability to reduce noise, a fundamental property multicellular organisms, yet its bases remains elusive. Imperfect bilateral symmetry, or fluctuating asymmetry, commonly used estimate stability. We observed that Drosophila melanogaster overexpressing Cyclin G (CycG) exhibit wing asymmetry clearly detectable by sight....
The detection of anatomical landmarks in bioimages is a necessary but tedious step for geometric morphometrics studies many research domains. We propose variants multi-resolution tree-based approach to speed-up the bioimages. extensively evaluate our method on three different datasets (cephalometric, zebrafish, and drosophila images). identify key parameters (notably multi-resolution) report results with respect human ground truths existing methods. Our achieves recognition performances...
The molecular chaperone protein Hsp90 has been widely discussed as a candidate gene for developmental buffering. We used the methods of geometric morphometrics to analyze its effects on variation among individuals and fluctuating asymmetry wing shape in Drosophila melanogaster. Three different experimental approaches were reduce activity. In first experiment, developing larvae reared food containing specific inhibitor Hsp90, geldanamycin, but neither individual nor was altered. Two further...
Deformities and fluctuating asymmetry in chironomid larvae have been proposed as sensitive indicators of biological stress are commonly used to assess the ecological impact human activities. In particular, they associated Chironomus riparius, most species, with heavy metal pesticide river pollution. this study, effect lead 4-nonylphenol on mouthpart morphological variation riparius was investigated by traditional geometric morphometrics. For purpose, first fourth instar were exposed sediment...
The origin of discrete novelties remains unclear. Some authors suggest that qualitative phenotypic changes may result from the reorganization preexisting traits during development (i.e., developmental recombination) following genetic or environmental changes. Because ants combine high modularity with extreme plasticity (queen and worker castes), their diversified castes could have evolved by recombination. We performed a quantitative morphometric study to investigate origins novel phenotypes...
Predation is a powerful selective force shaping many behavioural and morphological traits in prey species. The deflection of predator attacks from vital parts the usually involves coordinated evolution body shape colour. Here, we test effect hindwing (HW) tails swallowtail butterfly
Abstract Zimmermann, G., Bosc, P., Valade, Cornette, R., Améziane, N. and Debat, V. 2011. Geometric morphometrics of carapace Macrobrachium australe (Crustacea: Palaemonidae) from Reunion Island. — Acta Zoologica (Stockholm) 93 : 492–500. We investigated the structure shape variation in six populations Guérin‐Méneville 1838 Decapoda: Island (Indian Ocean) freshwaters. The morphometric analysis revealed occurrence two morphotypes corresponding to different types habitats. Individuals living...
Rapid evolution of genitalia shape, a widespread phenomenon in animals with internal fertilization, offers the opportunity to dissect genetic architecture morphological linked sexual selection and speciation. Most quantitative trait loci (QTL) mapping studies divergence have focused on Drosophila melanogaster its three most closely related species, D. simulans, mauritiana, sechellia, suggested that basis involves many loci. We report first study male between yakuba santomea, two species...