A5008631893- Insect symbiosis and bacterial influences
- Insect behavior and control techniques
- Plant and animal studies
- Insect-Plant Interactions and Control
- Evolution and Genetic Dynamics
- Insect Utilization and Effects
- Insect and Arachnid Ecology and Behavior
- Entomopathogenic Microorganisms in Pest Control
- Insect Pest Control Strategies
- Insect Resistance and Genetics
- Insect and Pesticide Research
- Forest Insect Ecology and Management
- Ecology and Vegetation Dynamics Studies
- Mosquito-borne diseases and control
- Genetic diversity and population structure
- Species Distribution and Climate Change
- Evolutionary Game Theory and Cooperation
- Animal Behavior and Reproduction
- Physiological and biochemical adaptations
- Neurobiology and Insect Physiology Research
- Invertebrate Immune Response Mechanisms
- Parasite Biology and Host Interactions
- Bird parasitology and diseases
- Vibrio bacteria research studies
- Bioeconomy and Sustainability Development
Université de Montpellier
2010-2025
Institut de Recherche pour le Développement
2012-2025
Institut Agro Montpellier
2014-2025
Centre de Coopération Internationale en Recherche Agronomique pour le Développement
2014-2025
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2020-2025
L'Institut Agro
2024-2025
Centre de Biologie et de Gestion des Populations
2015-2024
Agropolis International
2014-2024
State University of New York at Oswego
2019
Institut National de la Recherche Agronomique
2015
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...
How do invasive pests affect interactions between members of pre-existing agrosystems? The pest Drosophila suzukii is suspected to be involved in the aetiology sour rot, a grapevine disease that otherwise develops following melanogaster infestation wounded berries. We combined field observations with laboratory assays disentangle relative roles both development. observed emergence numerous D. , but no flies, from bunches started showing mild rot symptoms days after collection. However,...
Drosophila suzukii (Matsumura) is one of the most damaging and costly pests to invade temperate horticultural regions in recent history. Conventional control this pest challenging, an environmentally benign microbial biopesticide highly desirable. A thorough exploration pathogens infecting not only first step on road development effective biopesticide, but also provides a valuable comparative dataset for study viruses model family Drosophilidae. Here we use metatransciptomic approach...
The potential effect of larval condition on adult immunity in holometabolous insects is rarely considered. We show here that food composition can impact independent from effects general the animal. Rather, our data indicate a plastic allocation resources to high-protein environments. Specifically, we found increasing nutritional yeast (protein) available Drosophila melanogaster increased adult's constitutive transcription two genes encoding defensive antimicrobial peptides. Adult dry weight...
Evolutionary costs of parasite resistance arise if genes conferring reduce fitness in the absence parasites. Thus, parasite‐mediated selection may lead to increased and a correlated decrease fitness, whereas relaxed reverse evolution resistance. We tested this idea experimental populations protozoan Paramecium caudatum parasitic bacterium Holospora undulata. After eight years, infection asexual reproduction were compared among paramecia from (1) "infected" populations, (2) uninfected "naive"...
As human influence reshapes communities worldwide, many species expand or shift their ranges as a result, with extensive consequences across levels of biological organization. Range expansions can be ranked on continuum going from pulled dynamics, in which low-density edge populations provide the “fuel” for advance, to pushed dynamics high-density rear “push” expansion forward. While theory suggests that evolution during range could lead become time, empirical comparisons phenotypic...
Sexually transmitted symbionts can substantially affect the performance and evolution of their hosts. From a pest control perspective, sexually microorganisms insects be considered powerful biological agents or probiotics. The sterile insect technique (SIT) is currently being developed as new tool to Drosophila suzukii , major crop pest. With considerable numbers mass-reared released mate with wild individuals, understanding how microbiota transfers between adult necessary not only improve...
Abstract Almost all studies of the immune system animals with metamorphosis have focused on either larval or adult immunity, implicitly assuming that these traits are perfectly correlated evolutionarily independent. In this study, we use 80 crosses among 21 Drosophila melanogaster lines to investigate degree and constancy genetic correlation in activity between larvae adults. The constitutive transcription Diptericin , a gene encoding defensive antimicrobial peptide, was controlled by same...
Adapting to specific hosts often involves trade-offs that limit performance on other hosts. These constraints may either lead narrow host ranges (i.e. specialists, able exploit only one type) or wide leading lower each generalists). Here, we combined laboratory experiments field populations with experimental evolution investigate the impact of adaptation range and associated over this range. We used two-spotted spider mite, Tetranychus urticae, a model organism for studies specialization....
Studying distribution is necessary to understand and manage the dynamics of species with spatially structured populations. Here we studied in Tetranychus evansi T. urticae, two mite pests tomato, scope evaluating factors that can influence effectiveness Integrated Pest Management strategies. We found greater positive density-dependent than urticae when assayed on single, detached tomato leaves. Indeed, among leaflets increased initial population density while it was high even at low...
Range expansions are key processes shaping the distribution of species; their ecological and evolutionary dynamics have become especially relevant today, as human influence reshapes ecosystems worldwide. Many attempts to explain predict range assume, explicitly or implicitly, so‐called ‘pulled' expansion dynamics, in which low‐density edge populations provide most ‘fuel' for species advance. Some expansions, however, exhibit very different with high‐density behind front ‘pushing' forward....
Parasitic infection can modify host mobility and consequently their dispersal capacity. We experimentally investigated this idea using the ciliate Paramecium caudatum its bacterial parasite Holospora undulata . compared short-distance of infected uninfected populations in interconnected microcosms. Infection reduced proportion hosts dispersing, with levels differing among clones. Host higher densities showed lower dispersal, possibly owing to social aggregation behaviour. Parasite isolates...
Many organisms use cues to decide whether disperse or not, especially those related the composition of their environment. Dispersal hence sometimes depends on population density, which can be important for dynamics and evolution sub-divided populations. But very little is known about factors that inform dispersal decision. We investigated underlying density-dependent in inter-connected microcosms freshwater protozoan Paramecium caudatum. In two experiments, we manipulated (i) number cells...
The ecological and epidemiological processes underlying the success of parasites competing within individual hosts are not yet clear. We investigated one idea: that increasing parasite's infectious dose might decrease its competitor. reared uninfected larvae mosquito Aedes aegypti exposed them to two concentrations microsporidium Vavraia culicis protozoan Ascogregarina culicis. rate at which produced spores depended on competitor: when was high, only higher slowed production spores, but low,...
Populations vary in time and space, temporal variation may differ from spatial variation. Yet, the past half century, field data have confirmed both forms of Taylor's power Law, a linear relationship between log(variance) log(mean) population size. Recent theory predicted that competitive species interactions should reduce slope version Law. We tested whether this prediction applied to Law using simple, well-controlled laboratory populations two bacteria were cultured either separately or...
The environment is rarely constant and organisms are exposed to temporal spatial variations that impact their life histories inter-species interactions. It important understand how such affect epidemiological dynamics in host–parasite systems. We explored effects of variation temperature on experimental microcosm populations the ciliate Paramecium caudatum its bacterial parasite Holospora undulata . Infected uninfected two P. genotypes were created four treatments (26°C, 28°C, 30°C 32°C)...
Why is metamorphosis so pervasive? Does it facilitate the independent (micro)evolution of quantitative traits in distinct life stages, similarly to how enables some limbs and organs develop at specific stages? We tested this hypothesis by measuring expression 6400 genes 41 Drosophila melanogaster inbred lines larval adult stages. Only 30% showed significant genetic correlations between expression. By contrast, 46% level independence Gene ontology terms enrichment revealed that across stages...