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Diet effects on honeybee immunocompetence Inra
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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Differential gene expression of the honey bee Apis mellifera associated with Varroa destructor infection Inra
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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E-beta-Ocimene, a volatile brood pheromone involved in social regulation in the honey bee colony (Apis mellifera) Inra
Maisonnasse, A.; Lenoir, J.C.; Beslay, D.; Crauser, D.; Le Conte, Y..
Background: In honey bee colony, the brood is able to manipulate and chemically control the workers in order to sustaintheir own development. A brood ester pheromone produced primarily by old larvae (4 and 5 days old larvae) was firstidentified as acting as a contact pheromone with specific effects on nurses in the colony. More recently a new volatile broodpheromone has been identified: E-b-ocimene, which partially inhibits ovary development in workers.Methodology and Principal Finding: Our analysis of E-b-ocimene production revealed that young brood (newly hatched to3 days old) produce the highest quantity of E-b-ocimene relative to their body weight. By testing the potential action of thismolecule as a non-specific larval signal, due to its high...
Tipo: Journal Article Palavras-chave: ABEILLE DOMESTIQUE; INSECTE SOCIAL; PHEROMONE; COUVAIN; DEVELOPPEMENT OVARIEN; OUVRIERE HONEYBEE; SOCIAL INSECT; BROOD; OVARIAN DEVELOPMENT; WORKER.
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD201063cc6c9f&uri=/notices/prodinra1/2010/12/
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E-β-ocimene a new volatile primer pheromone that inhibits worker ovary development in honey bees Inra
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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Honey bee colonies that have survived Varroa destructor Inra
Le Conte, Y.; de Vaublanc, G.; Crauser, D.; Jeanne, F.; Rousselle, J.C.; Bécard, J.M..
We document the ability of a population of honey bee colonies to survive in France withoutVarroa suppression measures. We compared the mortality of collected Varroa surviving bee (VSB) stockwith that of miticide-treated Varroa-susceptible colonies. Varroa infestation did not induce mortality inthe VSB colonies. Some of the original colonies survived more than 11 years without treatment and theaverage survival of the experimental colonies was 6.54 ± 0.25 years. Swarming was variable (41.50 ± 9.94%) depending on the year. Honey production was significantly higher (1.7 times) in treated than inVSB colonies. For the first time since Varroa invaded France, our results provide evidence that untreatedlocal honey bee colonies can survive the mite, which may be the...
Tipo: Journal Article Palavras-chave:  ABEILLE DOMESTIQUE;  INSECTE SOCIAL;  POLLINISATEUR;  PARASITE;  HOST-PARASITE RELATIONSHIP;  RELATION HOTE-PARASITE;  SELECTION NATURELLE;  SURVIE;  COLONIE;  GESTION INTEGREE  SOCIAL INSECT;  POLLINATOR;  SURVIVAL;  COLONY;  INTEGRATED MANAGEMENT;  HONEY BEE;  NATURAL SELECTION;  TOLERANCE.
Ano: 2007 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD20097b481c6f&uri=/notices/prodinra1/2009/12/
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New insights into honey bee (Apis mellifera) pheromone communication. Is the queen mandibular pheromone alone in colony regulation Inra
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/
Registros recuperados: 6
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