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| Registros recuperados: 27 | |
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| Bouga, M.; ALAUX, C.; Bienkowska, M.; Büchler, R.; Carreck, N.L.; Cauia, E.; Chlebo, R.; Dahle, B.; Dall'Olio, R.; De la Rúa, P.; Gregorc, A.; Ivanova, E.; Kence, A.; Kence, M.; Kezic, N.; Kiprijanovska, H.; Kozmus, P.; Kryge, P.; Le Conte, Y.; Lodesani, M.; Murilhas, A.M.; Siceanu, A.; Soland, G.; Uzunov, A.; Wilde, J.. |
| Here, scientists from 19 European countries, most of them collaborating in Working Group 4: “Diversity and Vitality” of COST Action FA 0803“Prevention of honey bee COlony LOSSes” (COLOSS), review the methodology applied in each country for discriminating between honey beepopulations. Morphometric analyses (classical and geometric) and different molecular markers have been applied. Even if the approach hasbeen similar, however, different methodologies regarding measurements, landmarks or molecular markers may have been used, as well asdifferent statistical procedures. There is therefore the necessity to establish common methods in all countries in order to have results that canbe directly compared. This is one of the goals of WG4 of the COLOSS project |
| Tipo: Journal Article |
Palavras-chave: ABEILLE DOMESTIQUE; INSECTE SOCIAL; APICULTURE; SOUS-ESPECE; MORPHOMETRIE; ADN; ISOENZYME; MARQUEUR MOLECULAIRE; METHODOLOGIE; SYSTEMATIQUE; DIAGNOSE MOLECULAR MARKER; METHODOLOGY; SYSTEMATICS; DIAGNOSIS; HONEYBEE; BEEKEEPING; SUB-SPECIES; MORPHOMETRICS; DNA; ISOENZYMES. |
| Ano: 2011 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011a0114f97&uri=/notices/prodinra1/2011/04/ |
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| Kadala, A.; Charreton, M.; Jacob, I.; Le Conte, Y.; Collet, C.. |
| We studied the mode of action of type I pyrethroids on the voltage-dependent sodium current from honeybee olfactory receptor neurons (ORNs), whose proper function in antenna is crucial for interindividual communication in this species. Under voltage-clamp, tetramethrin and permethrin induce a long lasting TTX-sensitive tail current upon repolarization, which is the hallmark of an abnormal prolongation of the open channel configuration. Permethrin and tetramethrin also slow down the sodium current fast inactivation. Tetramethrin and permethrin both bind to the closed state of the channel as suggested by the presence of an obvious tail current after the first single depolarization applied in the presence of either compounds. Moreover, at first sight,... |
| Tipo: Journal Article |
Palavras-chave: ABEILLE DOMESTIQUE; SENSILLE ANTENNAIRE; NEURONE A RECEPTEUR OLFACTIF; NEURONE SENSORIEL; ELECTROPHYSIOLOGIE; PERMETHRINE; TETRAMETHRINE; PYRETHRINOIDE; COURANT IONIQUE; SANTE; MODE ACTION; CANAL SODIUM; MODIFICATION ETAT-DEPENDANTE APIS MELLIFERA; APIDAE; APIFORMES; HYMENOPTERA. |
| Ano: 2011 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201176512ee0&uri=/notices/prodinra1/2011/05/ |
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| ALAUX, C.; Ducloz, F.; Crauser, D.; Le Conte, Y.. |
| The maintenance of the immune system can be costly, and a lack of dietary protein can increase the susceptibility of organisms to disease. However, few studies have investigated the relationship between protein nutrition and immunity in insects. Here, we tested in honeybees (Apis mellifera) whether dietary protein quantity (monofloral pollen) and diet diversity (polyfloral pollen) can shape baseline immunocompetence (IC) by measuring parameters of individual immunity (haemocyte concentration, fat body content and phenoloxidase activity) and glucose oxidase (GOX) activity, which enables bees to sterilize colony and brood food, as a parameter of social immunity. Protein feeding modified both individual and social IC but increases in dietary protein quantity... |
| Tipo: Journal Article |
Palavras-chave: INSECTE SOCIAL; SYSTEME IMMUNITAIRE; REGIME ALIMENTAIRE; RESSOURCE ALIMENTAIRE SOCIAL INSECT; HONEYBEE; DIET; POLLEN; POLYFLORAL POLLEN; PROTEIN; DISEASE; IMMUNOCOMPETENCE. |
| Ano: 2010 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20109faf5aef&uri=/notices/prodinra1/2010/11/ |
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| Navajas, M.; Migeon, A.; Alaux, C.; Martin-Magniette, M.L.; Robinson, G.E.; Evans, J.D.; Cros-Arteil, S.; Crauser, D.; Le Conte, Y.. |
| Background: The parasitic mite, Varroa destructor, is the most serious pest of the western honey bee, Apis mellifera, and has caused the death of millions of colonies worldwide. This mite reproduces in brood cells and parasitizes immature and adult bees. We investigated whether Varroa infestation induces changes in Apis mellifera gene expression, and whether there are genotypic differences that affect gene expression relevant to the bee's tolerance, as first steps toward unravelling mechanisms of host response and differences in susceptibility to Varroa parasitism. Results: We explored the transcriptional response to mite parasitism in two genetic stocks of A. mellifera which differ in susceptibility to Varroa, comparing parasitized and non-parasitized... |
| Tipo: Journal Article |
Palavras-chave: ABEILLE DOMESTIQUE; APIS MELLIFERA; ACARIEN PARAISITE; VARROA DESTRUCTOR. |
| Ano: 2008 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20095dd5dfa6&uri=/notices/prodinra1/2010/12/ |
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| Maisonnasse, A.; Lenoir, J.C.; Costagliola, G.; Beslay, D.; Crauser, D.; Plettner, E.; Le Conte, Y.. |
| Dans une colonie d’abeilles sans reine ni couvain, les ouvrières tendent à devenir fertiles etinvestir leur énergie dans la ponte d’oeuf non-fécondés. Afin de maintenir une certainestabilité dans l’organisation de la colonie et prévenir ce détournement de l’investissementénergétique des ouvrières, la reine garantie son statut de seule reproductrice et le couvainaccapare le soin des ouvrières. Pour cela, ils émettent des phéromones peu volatiles. Laphéromone mandibulaire (principalement le 9-ODA) émis par la reine ainsi qu’un mélange de10 esters émis par le couvain. Ces composés permettent une castration chimique partielle desouvrières. Cependant, parmi les deux facteurs de régulation de la maturation ovarienne desouvrières, il semble que la présence de... |
| Tipo: Conference Paper |
Palavras-chave: ABEILLE DOMESTIQUE; INSECTE SOCIAL; PHEROMONE MODIFICATRICE; OUVRIERE; DEVELOPPEMENT OVARIEN; INHIBITION; E-BETA-OCIMENE HONEYBEE; SOCIAL INSECT; PRIMER PHEROMONE; ETHYL OLEATE; FORAGER; SOCIAL REGULATION; BEHAVIOURAL DEVELOPMENT. |
| Ano: 2009 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20117422a6d3&uri=/notices/prodinra1/2011/01/ |
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| ALAUX, C.; Brunet, J.L.; Dussaubat, C.; Mondet, F.; Tchamitchian, S.; Cousin, M.; Brillard, J.; Baldy, A.; Belzunces, L.; Le Conte, Y.. |
| Global pollinators, like honeybees, are declining in abundance and diversity, which can adversely affect natural ecosystems and agriculture. Therefore, we tested the current hypotheses describing honeybee losses as a multifactorial syndrome, by investigating integrative effects of an infectious organism and an insecticide on honeybee health. We demonstrated that the interaction between the microsporidia Nosema and a neonicotinoid (imidacloprid) significantly weakened honeybees. In the short term, the combination of both agents caused the highest individual mortality rates and energetic stress. By quantifying the strength of immunity at both the individual and social levels, we showed that neither the haemocyte number nor the phenoloxidase activity of... |
| Tipo: Journal Article |
Palavras-chave: ABEILLE DOMESTIQUE; SANTE; MICROSPORIDIE; INSECTICIDE; NEONICOTINOIDE; IMIDACLOPRIDE; SYNERGIE; MORTALITE; STRESS ENERGETIQUE; IMMUNITE INDIVIDUELLE; IMMUNITE DE LA COLONIE; LUTTE INTEGREE HONEYBEE; HEALTH; MICROSPORIDIA; NEONOCOTINOID; IMIDACLOPRID; SYNERGY; MORTALITY; ENERGETIC STRESS; INDIVIDUAL IMMUNITY; SOCIAL IMMUNITY; GLUCOSE OXIDASE; IPM. |
| Ano: 2010 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010b2d84f1e&uri=/notices/prodinra1/2010/11/ |
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| Navajas Navarro, M.; Anderson, D.; de Guzman, L.L.; Huang, Z.Y.; Clement, J.; Zhou, T.; Le Conte, Y.. |
| The invasion of the Western honey bee, Apis mellifera, by Varroa destructor is attributed to two mitochondrial haplotypes (K and J) that shifted last century from their primary host the Eastern honey bee, A. cerana, in north-east Asia. Here, mitochondrial DNA sequences (cox1, cox3, atp6 and cytb: 2700 base pairs) were obtained from mites infesting both Eastern and Western honeybees (respectively 21 and 11 colonies) from Asia including regions where the shifts first occurred. A total of eighteen haplotypes were uncovered in Asia (11 on A. cerana and 7 on A. mellifera). Two new variants of the K haplotype and two of the J haplotype were found onWestern honeybees in what appeared to be well-established infestations. New haplotypes may represent a potential... |
| Tipo: Journal Article |
Palavras-chave: ABEILLE DOMESTIQUE; ACARIEN; VARROA; ADN MITOCHONDRIAL APIS MELLIFERA; APIS CERANA; APIDAE; ACARI; HYMENOPTERA; APIFORMES. |
| Ano: 2010 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010b31daedc&uri=/notices/prodinra1/2011/03/ |
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| Maisonnasse, A.; ALAUX, C.; Beslay, D.; Crauser, D.; Gines, C.; Plettner, E.; Le Conte, Y.. |
| BackgroundIn social insects, the queen is essential to the functioning and homeostasis of the colony. This influence has been demonstrated to be mediated through pheromone communication. However, the only social insect for which any queen pheromone has been identified is the honey bee (Apis mellifera) with its well-known queen mandibular pheromone (QMP). Although pleiotropic effects on colony regulation are accredited to the QMP, this pheromone does not trigger the full behavioral and physiological response observed in the presence of the queen, suggesting the presence of additional compounds. We tested the hypothesis of a pheromone redundancy in honey bee queens by comparing the influence of queens with and without mandibular glands on worker behavior and... |
| Tipo: Journal Article |
Palavras-chave: ABEILLE DOMESTIQUE; INSECTE SOCIAL; COMMUNICATION CHIMIQUE; REGULATION DE LA COLONIE; PHEROMONE MANDIBULAIRE; REINE HONEYBEE; SOCIAL INSECT; CHEMICAL COMMUNICATION; COLONY REGULATION; MANDIBULAR PHEROMONE; QUEEN. |
| Ano: 2010 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20107dd8a7f2&uri=/notices/prodinra1/2010/11/ |
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| ALAUX, C.; Folschweiller, M.; McDonnell, C.; Beslay, D.; Cousin, M.; Dussaubat, C.; Brunet, J.L.; Le Conte, Y.. |
| Nosema ceranae, a microsporidian parasite originally described in the Asian honey bee Apis cerana, has recently been found to be cross-infective and to also parasitize the European honey bee Apis mellifera. Since this discovery, many studies have attempted to characterize the impact of this parasite in A. mellifera honey bees. Nosema species can infect all colony members, workers, drones and queens, but the pathological effects of this microsporidium has been mainly investigated in workers, despite the prime importance of the queen, who monopolizes the reproduction and regulates the cohesion of the society via pheromones. We therefore analyzed the impact of N. ceranae on queen physiology. We found that infection by N. ceranae did not affect the fat body... |
| Tipo: Journal Article |
Palavras-chave: MICROSPORIDIE; PARASITE; REINE; SANTE; PHYSIOLOGIE; CORPS GRAS; ENERGIE; VITELLOGENINE; FERTILITE; LONGEVITE; ANTIOXIDANT; PHEROMONE MANDIBULAIRE MICROSPORIDIA; QUEEN; HEALTH; PHYSIOLOGY; FAT BODY; ENERGY; VITELLOGENIN; FERTILITY; LONGEVITY; MANDIBULAR PHEROMONE; PHEROMONE; HONEY BEE QUEEN; VITELLOGENIN; QUEEN MANDIBULAR PHEROMONES; ANTIOXIDANT CAPACITY. |
| Ano: 2011 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20116cf9b1bf&uri=/notices/prodinra1/2011/04/ |
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| Slessor, K.N.; Winston, M.L.; Le Conte, Y.. |
| Recent studies have demonstrated a remarkable and unexpected complexity in social insect pheromone communication, particularly for honeybees (Apis mellifera L.). The intricate interactions characteristic of social insects demand a complex language, based on specialized chemical signals that provide a syntax that is deeper in complexity and richer in nuance than previously imagined. Here, we discuss this rapidly evolving field for honeybees, the only social insect for which any primer pheromones have been identified. Novel research has demonstrated the importance of complexity, synergy, context, and dose, mediated through spatial and temporal pheromone distribution, and has revealed an unprecedented wealth of identified semiochemicals and functions. These... |
| Tipo: Journal Article |
Palavras-chave: ABEILLE DOMESTIQUE; INSECTE UTILE; INSECTE SOCIAL; POLLINISATEUR; APIS MELLIFERA; APIDAE; HYMENOPTERA; COMMUNICATION ANIMALE; ECOLOGIE CHIMIQUE; TERMINOLOGIE APIS MELLIFERA; HONEYBEE; SOCIAL INSECT; CHEMICAL COMMUNICATION; PHEROMONE; CHEMOECOLOGY. |
| Ano: 2005 |
URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PUB9500027852111337&uri=/notices/prodinra1/2010/11/ |
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| Registros recuperados: 27 | |
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