Gerard Duvallet

Gerard Duvallet
Paul Valéry University, Montpellier 3 · Département de Biologie, Ecologie, Environnement

36.64
 · 
PhD

About

137
Publications
29,730
Reads
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1,578
Citations
Research Experience
January 2002 - present
Kasetsart University
Position
  • Ecology / Phylogeny / Systematics / Control of Stomoxyine flies in Thailand
Description
  • Visiting Professor. Research Projects on the ecology of StableFflies
January 2001 - present
Centre d'Ecologie Fonctionnelle et Evolutive
Position
  • Ecology / Phylogeny / Phylogeography / Systematics / Control of Stomoxyine flies
Description
  • Ecology and control of blood-sucking insects, mainly stable flies.
September 1999 - present
Université Paul-Valéry Montpellier 3
Position
  • Ecology / Biology / Physiology / Medical Entomology
Description
  • Professor Emeritus

Publications

Publications (137)
Article
Full-text available
The genus Haematobosca Bezzi, 1907 (Diptera: Muscidae) contains haematophagous flies of veterinary importance. A new fly species of this genus was recognised from northern Thailand based on morphological characters and described as Haematobosca aberrans Pont, Duvallet & Changbunjong, 2020. In the present study, the mitochondrial cytochrome c oxidas...
Article
Résumé En entomologie médicale et vétérinaire, les moustiques ont une place importante à la fois comme sources de nuisances en lien avec leur hématophagie, mais aussi comme vecteurs potentiels de pathogènes. Sont abordés ici la diversité des moustiques dont près de 3 500 espèces différentes sont connues, mais aussi des pathogènes transmis. Environ...
Article
Chrysops spp. or deer flies (Diptera: Tabanidae) are hematophagous flies of medical and veterinary importance and some species are important vectors of Trypanosoma evansi, the causative agent of surra in Thailand. However, data regarding deer fly species and their molecular identification are limited. Accurate species identification will indicate t...
Article
Full-text available
Article Info AGRICULTURE AND NATURAL RESOURCES The Tabanidae family consists globally of 4,400 known species of biting flies, with 83 species in France. Horseflies were captured with 7 H-Traps on a farm near Montélimar, southern France, during 21 wk from May to September 2017. In total, 54,618 specimens were captured belonging to the Chrysopsinae,...
Article
Full-text available
A new species of biting-fly from northern Thailand is described as Haematobosca aberrans sp. nov. (Muscidae). It differs from all known species of Haematobosca by the absence of the anterior katepisternal seta.
Article
Full-text available
The rangelands of the Vina Division on the Adamawa Plateau are densely infested with Stomoxyinae, but little is known about their species composition and ecology. A trap-transect survey was carried out in three villages: Galim, Mbidjoro, and Velambai, using Nzi ( n = 3), Vavoua ( n = 3), and Biconical ( n = 3) traps, all baited with octenol. Three...
Article
Stable fly collections were conducted to study the species composition and daytime activity of Stomoxys spp. (Diptera: Muscidae) in Peninsular Thailand (Songkhla, Trang, Pattalung, Nakon Si Thammarat, and Satun provinces). Vavoua traps were used for fly collections in wet and dry seasons each year. Four Stomoxys species were found, S. calcitrans (L...
Article
Stomoxyinae flies (Diptera: Muscidae) are cosmopolitan obligate hematophagous insects of medical and veterinary importance. The subfamily Stomoxyinae includes 51 known species within 10 genera. Five genera, Stomoxys, Haematobosca, Haematobia, Haematostoma, and Stygeromyia, represent important livestock pests causing substantial economic losses in t...
Article
Full-text available
Anecdotal evidence of pyrethroid insecticide product failure for the control of stable fly [Stomoxys calcitrans (L.)] populations in the United States and worldwide prompted us to evaluate the frequency of knockdown resistance (kdr)-type polymorphisms within the voltage-sensitive sodium channel (Vssc) gene of field collected specimens from the Unit...
Article
Stomoxys calcitrans (Diptera: Muscidae), is an important vector of lumpy skin disease and bovine besnoitiosis in Europe. Control of this biting fly could represent a keystone in the containment of this emerging disease. Reports of insecticide resistance in S. calcitrans are scarce in Europe. Therefore, the purpose of this study was to evaluate the...
Chapter
Adult Brachycera can affect dairy cattle through their feeding behaviour. The main families of veterinary importance are Tabanidae, Athericidae, Rhagionidae, Muscidae, Glossinidae and Hippoboscidae. Non-biting flies such as house flies and face flies ingest liquids from animal tissues using sponging mouthparts, whereas biting flies such as tabanids...
Preprint
L'étude du contenu pollinique de deux échantillons prélevés, soit sur un spécimen de Megachile sculpturalis Smith, 1853, soit dans la loge d'un "hôtel à insectes" fréquenté par cet Hyménoptère, livre des indications préli-minaires sur le comportement de butinage et sur le régime alimentaire de cette abeille invasive dont la première observation en...
Chapter
The number of already known arthropod species is almost two million and account for over 80% of all living animal species. Most of them do not affect humans and are essential in the maintenance of the ecosystem. However, some arthropods are pests of cultivated plants and pests of stored products. Some can be pathogen themselves as ectoparasites. So...
Book
Fiche détaillée de l'ouvrage : http://www.quae.com/fr/r5107-entomologie-medicale-et-veterinaire.html Dans un contexte d’expansion générale des maladies transmises par les insectes, cet ouvrage de référence présente un état actualisé des connaissances sur tous les groupes d’arthropodes d’intérêt médical et vétérinaire. Pragmatique et opérationnel,...
Article
Full-text available
In order to circumscribe the breeding sites of stomoxes in the Makokou region, eight potentially favorable environments were sampled from January to June 2007 in three habitats: primary and secondary forest (natural environments) and the anthropic environment (artificial or disturbed areas). In the primary forest, three types of substrates were col...
Article
Full-text available
The parasitic diseases discussed elsewhere in this issue of the Scientific and Technical Review are not the only ones to make use of biological vectors (such as mosquitoes or ticks) or mechanical vectors (such as horse flies or Stomoxys flies). The authors discuss two major groups of vector-borne parasitic diseases: firstly, helminthiasis, along wi...
Article
Full-text available
In order to minimize risks of pathogen transmission with the development of ecotourism in Gabon, a seasonal inventory has been performed in five contrasted biotopes in Ivindo (INP) and Moukalaba-Doudou (MDNP) National Parks. A total of 10,033 hematophagous flies were captured. The Glossinidae, with six different species identified, was the most abu...
Article
Full-text available
Les rythmes circadiens des insectes hématophages constituent un facteur épidémiologique essentiel car ils dé­ terminent les moments de la journée où s’effectue le contact entre l’hôte vertébré et l’insecte. Afin de déterminer les périodes d’activité journalière des stomoxes dans le Parc National de l’Ivindo au Nord­est du Gabon, nous avons réalisé...
Article
The parasitic diseases discussed elsewhere in this issue of the Scientific and Technical Review are not the only ones to make use of biological vectors (such as mosquitoes or ticks) or mechanical vectors (such as horse flies or Stomoxys flies). The authors discuss two major groups of vector-borne parasitic diseases: firstly, helminthiasis, along wi...
Article
Full-text available
Abstract Ticks are arthropods and the most important vectors of major human diseases after mosquitoes. Due to their impact on public health, in vitro and in vivo assays have been developed to identify molecules with repellent activities on ticks. Repellents are useful to reduce tick bite exposure and the potential transmission of pathogens; they ca...
Article
Full-text available
Resistance to conventional synthetic pesticides has been widely reported in ticks, parasitic mites and other pests of veterinary and medical significance. New and novel approaches to manage these pests are therefore needed to ensure efficient control programmes that can be implemented now and in the future. Recent research in this area has focused...
Article
Full-text available
Stomoxys flies are mechanical vectors of pathogens present in the blood and skin of their animal hosts, especially livestock, but occasionally humans. In livestock, their direct effects are disturbance, skin lesions, reduction of food intake, stress, blood loss, and a global immunosuppressive effect. They also induce the gathering of animals for mu...
Article
Full-text available
Lemongrass oil (Cymbopogon citratus) is an effective repellent against mosquitoes (Diptera: Culicidae) and house flies (Diptera: Muscidae). In this study, its effectiveness was assessed on stable flies (Diptera: Muscidae) in laboratory conditions. First, we demonstrated that lemongrass oil is an active substance for antennal olfactory receptor cell...
Article
The vertical distribution of Stomoxys spp. was studied in a rainforest area, Ipassa-Makokou biosphere reserve located in the Ivindo National Park of Gabon. From April to June 2006, Vavoua traps were set out during 15 consecutive days per month at different heights above ground level corresponding to vertical layers of rainforest: 50 cm, 10, 20 and...
Article
Understanding the pattern of abundance of vector populations is important to control the potential of transmission of associated pathogens. The pattern of abundance of Stomoxys Geoffroy, an ubiquitous blood-sucking fly, is poorly known in tropical Africa. In this study, we investigated the spatio-temporal pattern of abundance of the Stomoxys genus...
Article
Full-text available
Effective control of mosquito borne diseases has proven extremely difficult with both vector and pathogen remaining entrenched and expanding in many disease endemic areas. When lacking an effective vaccine, vector control methods targeting both larval habitats and adult mosquito populations remain the primary strategy for reducing risk. Aedes albop...
Article
Full-text available
A study of species diversity of Stomoxys spp. and diurnal variations of activity of the most abundant was performed during a one year period at a local dairy cattle farm in Wang Nam Khiao District, Nakhon Ratchasima Province, Thailand. Four species of stomoxyine flies were morphologically identified, including Stomoxys indicus Picard 1908, S. calci...
Book
Full-text available
L’actualité récente avec les premiers cas de transmission autochtone par Aedes albopictus des virus chikungunya et de la dengue dans le sud de la France continentale, s’ajoutant aux nuisances et vecteurs potentiels que l’on peut rencontrer lors de voyages ou de missions plus ou moins longues dans les régions à climat chaud, a montré l’intérêt d’une...
Conference Paper
Introduction The International Master in medical and veterinary Entomology (IME) is a teaching programme for 2nd year Master students on vector systematics, biology and ecology, population genetics, genomics and control. The IMEs objective is to prepare future researchers in areas of public health, veterinary, teaching and research. Materials and...
Chapter
Full-text available
Après avoir passé en revue plusieurs groupes d'espèces parmi la flore, la faune et la fonge, interrogeons-nous à présent sur la nature des interactions entre l'homme et la nature. Notre monde vit actuellement une période marquée par des changements globaux, donc à l'échelle du globe. Ceux-ci sont de différents types : climatiques, modifications des...
Article
Full-text available
Recent events with the first cases of local transmission of chikungunya and dengue fever virus in southern France by Aedes albopictus, adding to the nuisance and potential vectors that can be encountered when traveling in tropical or sub-tropical countries, has shown the value of a reflection on the Personal protection against vectors (PPAV). It is...
Article
The genus Stomoxys Geoffroy (Diptera; Muscidae) contains species of parasitic flies that are of medical and economic importance. We conducted a phylogenetic analysis including 10 representative species of the genus including multiple exemplars, together with the closely related genera Prostomoxys Zumpt, Haematobosca Bezzi, and Haematobia Lepeletier...
Article
Stomoxys calcitrans (Diptera: Muscidae: Stomoxyini), a synanthropic fly with a worldwide distribution, is recognized to have an important medical and veterinary impact. We conducted a phylogeographic analysis based on several populations from five major zoogeographic regions of the world in order to analyse population genetic structure of S. calcit...
Article
Full-text available
Stomoxyine flies (Stomoxys spp.) were collected in 10 localities of Thailand using the Vavoua traps. These localities represented four major ecological settings, as follows: small local dairy farms, large industrial dairy farms, a national park, and one elephant conservation area. Three species of stable flies were identified in the following propo...
Article
Full-text available
Starch gel electrophoresis of isozymes was used to estimate gene flow among nine populations of Stomoxys calcitrans (L.) (Diptera: Muscidae) from Thailand. Of the 13 putative loci, nine polymorphic loci were detected. Limited genetic differentiation among populations was observed (F(ST) = 0.060). The highest level of polymorphism was observed in fl...
Article
Full-text available
Diurnal sampling of stable flies (Stomoxys spp.) was carried out in ten localities throughout Thailand in 2007. Vavoua traps were used to lure and capture flies in ten provinces of the country, representing four major ecological settings: six small local dairy farms; two large industrial dairy farms; one national park; and one wildlife conservation...
Article
Full-text available
Geraniol is a bioactive component found in Palmarosa essential oil which has previously demonstrated good repellence to cattle ticks, mosquitoes and sand flies. The toxicity of geraniol to Dermanyssus gallinae, the most economically deleterious ectoparasite of laying hens in Europe, was studied in vitro in the laboratory, Exposure of D. gallinae to...
Article
Full-text available
Geraniol is a bioactive component found in Palmarosa essential oil which has previously demonstrated good repellence to cattle ticks, mosquitoes and sand flies. The toxicity of geraniol to Dermanyssus gallinae, the most economically deleterious ectoparasite of laying hens in Europe, was studied in vitro in the laboratory. Exposure of D. gallinae to...
Article
Full-text available
A field trial on the efficacy of 1% geraniol (Fulltec) spray against ticks has been carried out in two farms near Rabat (Morocco). Results clearly revealed that 1% geraniol has a preventive effect against Hyalomma ticks. Comparison of geraniol sprayed cows with control herd showed a reduction of mean number of ticks per animal of 98.4%, 97.3% and 9...
Article
Full-text available
Isozymes from five wild-caught Stomoxys calcitrans (L.) were compared using starch gel electrophoresis to estimate the rates of gene flow between and among S. calcitrans populations from five different geographic regions of Thailand. Among ten enzyme systems, 13 putative loci and 10 polymorphisms were detected. Limited genetic differentiation among...
Article
Full-text available
To investigate whether different landscapes could affect genetic diversity and structure of the cosmopolitan diptera Stomoxys calcitrans, populations from Gabon and southern France were studied using dominant amplified fragment length polymorphism (AFLP) markers. Gabon is characterized by a forested closed landscape, and southern France by an open...
Article
Full-text available
To determine the origin of stomoxyine fly bloodmeals (Diptera: Muscidae) in Gabon, 1,021 flies belonging to seven different species of Stomoxys were captured and dissected in the area of Makokou. In total, 798 were not blood-fed and 223 bloodmeals could be gathered on filter paper. The identification of the origin of these meals was made by amplifi...
Article
Full-text available
Pour déterminer l’origine des repas de sang des stomoxes (Diptera : Muscidae) au Gabon, 1 021 mouches appartenant à sept espèces différentes ont été capturées et disséquées dans la région de Makokou. Au total, 798 n’étaient pas gorgées et 223 repas de sang ont pu être recueillis sur papier filtre. L’identification de l’origine de ces repas a été fa...
Article
Full-text available
This paper summarizes the geography of sleeping sickness disease (or Human African Trypanosomiasis, HAT) over the last 100 years in West Africa, with the objective of identifying today's priority areas for the sleeping sickness surveillance. The history and geography of the disease are based on a bibliographic review of old reports and recent publi...
Article
Full-text available
The stomoxyine flies are hematophagous diptera and potential vectors of various pathogenic agents. Like those of the Afrotropical Region, the stomoxyine flies of Gabon remain nearly unknown. For these reasons, an entomological survey was conducted in a transverse way in eight localities representative of the various ecological zones of Gabon. The s...
Article
To review the geography and history of sleeping sickness (Human African trypanosomiasis; HAT) over the past 100 years in West Africa, to identify priority areas for sleeping sickness surveillance and areas where HAT no longer seems active. History and geography of HAT were summarized based on a review of old reports and recent publications and on r...
Article
Adult populations of stable flies were sampled along an altitudinal transect in Reunion Island to determine whether higher temperatures were associated with: (a) higher numbers of flies; (b) a longer season of infestation, and/or (c) different responses to warming in the cosmopolitan Stomoxys calcitrans (L) and the tropical Stomoxys niger niger Mac...
Article
Following the discovery of four cases of African human trypanosomiasis, an entomological survey was conducted along the Mouhoun river in southwest Burkina Faso to collect Glossina palpalis gambiensisand G.tachinoides.Among 226 flies dissected, 4.87% (eleven individuals) were infected in midgut or proboscis, but never in the salivary glands. Polymer...
Article
Full-text available
Les stomoxes (Stomoxys spp.) sont des diptères hématophages, vecteurs potentiels de divers agents pathogènes. Comme ceux de la région afrotropicale en général, les stomoxes du Gabon demeurent mal connus. Pour ces raisons, une enquête entomologique a été conduite de façon transversale dans huit localités représentatives des diverses zones écologique...
Article
Full-text available
Seasonal variations of insect population sizes are often dramatic, particularly in temperate regions and at altitudes where the climatic conditions are unfavorable to insect development during the winter. Decline of population size (or bottlenecks) and founder events may reduce the genetic variability and may create genetic differentiation between...
Article
The main objective of this study was to compare the trapping efficiency of two Alsynite sticky traps (modified Williams and modified Broce) and two phtalogen blue cloth traps (Vavoua and Nzi) to be used in an integrated control programme of Stomoxys spp. (Diptera: Muscidae) on Reunion Island. Mean daily catches of these flies on two dairy farms dif...
Article
Full-text available
Modifications in the distribution and/or the behavior of many living species are observed by the biologists. The latter try to analyze the importance of the global warming in these modifications. The influence of the climatic change on the risk of emergence of vectorial diseases, in particular, became an alarming topic for people. Some arthropods r...
Article
Full-text available
Morphological characteristics of Stomoxys spp. were studied and recorded for the first time in Thailand. Specimens were collected in central Thailand at Nakhon Pathom, Kanchanaburi and Saraburi Province, using Vavoua traps and sweep net. It was found that Stomoxys calcitrans (L.) was the most commonly abundant species, followed by Stomoxys sitiens...
Article
Full-text available
The seasonal changes and the daily activity of Stomoxyine species (Diptera: Muscidae) were examined, using Vavoua traps, in a dairy and a beef cattle farm in Nakhonpathom province, Thailand during July 2004 to June 2005. Over this period, Stomoxys calcitrans was the most commonly trapped species, followed by S. sitiens and S. indica. For the later...
Article
Full-text available
Adult survival and reproduction were compared between two Stomoxys species that co-occur in La Reunion, the cosmopolitan Stomoxys calcitrans (L.), and the tropical Stomoxys niger niger Macquart. In a first experiment, mean longevity and fecundity were determined at five constant temperatures from 15 to 35 degrees C, after development at the same te...
Article
Full-text available
Two stable fly species, Stomoxys calcitrans (L., 1758) and Stomoxys niger niger Macquart, 1851, co-occur in La Reunion, where they are important pests of cattle. The survival and developmental rate of the immature stages were compared at five constant temperatures from 15 to 35 degrees C. In both species, immature survival was highest at 20-25 degr...