A5079182954- Parasite Biology and Host Interactions
- Bird parasitology and diseases
- Animal Behavior and Reproduction
- Insect symbiosis and bacterial influences
- Evolution and Genetic Dynamics
- Invertebrate Immune Response Mechanisms
- Parasites and Host Interactions
- Malaria Research and Control
- Viral Infections and Vectors
- Vector-borne infectious diseases
- Avian ecology and behavior
- Wildlife Ecology and Conservation
- Plant and animal studies
- Evolutionary Game Theory and Cooperation
- Mosquito-borne diseases and control
- Circadian rhythm and melatonin
- Aquaculture disease management and microbiota
- Dietary Effects on Health
- Zoonotic diseases and public health
- Insect and Arachnid Ecology and Behavior
- Animal Ecology and Behavior Studies
- Genetics, Aging, and Longevity in Model Organisms
- Bat Biology and Ecology Studies
- Animal Disease Management and Epidemiology
- Neurobiology and Insect Physiology Research
Maladies Infectieuses et Vecteurs: Écologie, Génétique, Évolution et Contrôle
2010-2019
Centre d'Écologie Fonctionnelle et Évolutive
2010-2019
Agropolis International
2012-2019
Centre de Biologie et de Gestion des Populations
2014-2018
Institut de Recherche pour le Développement
2010-2016
Centre de Coopération Internationale en Recherche Agronomique pour le Développement
2014-2016
Institut Agro Montpellier
2016
Centre National de la Recherche Scientifique
2007-2015
Université de Bourgogne
2007-2013
Biogéosciences
2007-2013
How does an animal age in natural conditions? Given the multifaceted nature of senescence, identifying effects on physiology and behavior remains challenging. We investigated a broad array phenotypic traits wild, long-lived animal, wandering albatross. studied foraging using satellite tracking activity loggers males females (age 6–48+ years), monitored reproductive performance nine markers baseline known to reflect senescence vertebrates (humoral immunity, oxidative stress, antioxidant...
Abstract The epidemiology of vector‐borne pathogens is largely determined by the host‐choice behaviour their vectors. Here, we investigate whether a Plasmodium infection renders host more attractive to host‐seeking mosquitoes. For this purpose, work on novel experimental system: avian malaria parasite relictum , and its natural vector, mosquito Culex pipiens . We provide uninfected mosquitoes with choice between an bird undergoing either acute or chronic infection. Mosquito assessed...
Host resources can drive the optimal parasite exploitation strategy by offering a good or poor environment to pathogens. Hosts living in resource-rich habitats might offer favourable developing parasites because they provide wealth of resources. However, hosts afford higher investment into costly immune defences providing an effective barrier against infection. Understanding how adapt different quality is major challenge light current human-driven environmental changes. We studied role...
Malaria parasites have been shown to adjust their life history traits changing environmental conditions. Parasite relapses and recrudescences—marked increases in blood parasite numbers following a period when the was either absent or present at very low levels blood, respectively—are expected be part of such adaptive plastic strategies. Here, we first theoretical model that analyses evolution transmission strategies fluctuating seasonal environments show may if they are concomitant with...
Avian malaria has historically played an important role as a model in the study of human malaria, being stimulus for development medical parasitology. recently come back to research scene unique animal understand ecology and evolution disease, both field laboratory. is highly prevalent birds mosquitoes around world amenable laboratory experimentation at each stage parasite's life cycle. Here, we take stock 5 years experimental carried out using Plasmodium relictum SGS1, most avian lineage...
The biting behaviour of mosquitoes is crucial for the transmission malaria parasites. This study focuses on feeding Culex pipiens with regard to infection status by avian parasite Plasmodium relictum (lineage SGS1). Uninfected and sporozoite-infected were provided a choice between an uninfected bird undergoing chronic P. infection. Mosquito assessed microsatellite typing ingested blood. Chronically infected birds are more attractive mosquitoes. not altered mosquitoes: both have similar host...
Many trophically transmitted parasites manipulate their intermediate host phenotype, resulting in higher transmission to the final host. However, it is not known if manipulation a fixed adaptation of parasite or dynamic process upon which selection still acts. In particular, local has never been tested manipulating parasites. this study, using experimental infections between six populations acanthocephalan Pomphorhynchus laevis and its amphipod Gammarus pulex, we investigated whether...
Abstract Immunity is at the core of major theories related to invasion biology. Among them, evolution increased competitive ability ( EICA ) and ‐refined hypotheses have been used as a reference work. They postulate that release from pathogens often experienced during should favour reallocation resources (costly) immune defences beneficial life‐history traits associated with invasive potential. We review studies documenting changes animal invasions. describe designs approaches applied...
Some Plasmodium species have the ability to modify behaviour of their mosquito vectors. This is thought be an adaptive strategy that maximizes parasite's transmission.The effect relictum infections on blood feeding Culex pipiens quinquefasciatus mosquitoes was monitored.Plasmodium did not alter proportion fed but they affect dynamics and size meal. Sporozoite-infected completed meal 1.3 times later than uninfected ended up with smaller meals.The potential nature this manipulation discussed...
Innate immunity relies on effectors, which produce cytotoxic molecules that have not only the advantage of killing pathogens but also disadvantage harming host tissues and organs. Although role dietary antioxidants in invertebrate is still unknown, it has been shown vertebrates carotenoids scavenge radicals generated during immune response. Carotenoids may consequently decrease self-harming cost immunity. A positive relationship between levels innate defence circulating carotenoid might...
Insecticide resistance has the potential to alter vector immune competence and consequently affect transmission of diseases. Using both laboratory isogenic strains field-caught Culex pipiens mosquitoes, we investigated effects insecticide on an important component mosquito system: phenoloxidase (PO) activity. As infection risk varies dramatically with age sex allocation PO immunity was quantified across different stages life cycle. Our results were consistent in showing that larvae have a...
Pomphorhynchus laevis, a fish acanthocephalan parasite, manipulates the behaviour of its gammarid intermediate host to increase trophic transmission definitive host. However, intensity behavioural manipulation is variable between individual gammarids and parasite populations. To elucidate causes this variability, we compared level phototaxis alteration induced by different sibships from one population, using experimental infections Gammarus pulex P. laevis. We used naive carried out our...
Parasite infections often induce a reduction in host immune response either because of direct manipulation the system by parasite or energy depletion. Although infection-induced immunodepression can favour establishment within host, too severe may increase risk infection with opportunistic pathogens, stopping period over which be transmitted to other hosts. Here, we explore how contracting diseases affects survival amphipod Gammarus pulex infected acanthocephalan Pomphorhynchus laevis ....
Biological invasions provide unique opportunities for studying life history trait changes over contemporary time scales. As spatial spread may be related to in parasite communities, several hypotheses (such as the evolution of increased competitive ability (EICA) or EICA‐refined hypotheses) suggest immune invasive species along invasion gradients. Although native hosts subject similar selection pressures, their responses have been rarely investigated contexts. In this study, we evaluated...
SUMMARY Biological invasions expose parasites to new invasive hosts in addition their local hosts. However, are often less successful infecting and exploiting This may have major consequences for the competitive ability of hosts, finally on fate parasite-host community. In Burgundy (Eastern France), acanthocephalan parasite, Pomphorhynchus laevis , infects 2 amphipod species living sympatry: native Gammarus pulex roeseli . While P. affects behaviour immunity G. seems unaffected by infection....
Parasites often manipulate host immunity for their own benefit, either by exacerbating or suppressing the immune response and this may directly affect expression of parasite virulence. However, genetic variation in immunodepression, which is a prerequisite to its evolution, relationship between immunodepression virulence, have rarely been studied. Here, we investigated among sibships acanthocephalan parasite, Pomphorhynchus laevis, infecting immunodepressing amphipod host, Gammarus pulex. We...
Abstract Precopulatory mate guarding is a common strategy, which has evolved in species where the female receptivity (and thus egg fertilization) predictable, but also limited to short period. Although males are larger than females many amphipods, largest pair with females, leading positive size‐assortative pairing. Size‐assortative pairing received much attention how moulting physiology could affect decisions rarely been studied. Here, we tested hypothesis that freshwater amphipod G ammarus...
Larval helminths exploit the physiology of their intermediate hosts: first, as a resource for energy and space second by altering immune system activity to ensure survival. Whereas growth pattern under parasite competition has been investigated, effect multiple infections on level parasite-induced immunodepression in trophically transmitted helminth neglected. In this study, amphipods Gammarus pulex were infected laboratory acanthocephalan Pomphorhynchus laevis investigate how density host...