Search results for "Hôte"
showing 10 items of 52 documents
Paysandisia archon: Taxonomy, distribution, biology and life cycle
2017
The taxonomic position of the family Castniidae within the order Lepidoptera has changed over time. Initially, it was classified in the superfamily Sesioidea, and then it was grouped in a large assemblage including the Cossoidea, Sesioidea, and Zygaenoidea. Recent studies have included it in the superfamily Cossoidea. In Europe, the palm borer moth (PBM) Paysandisia archon is the only species of the Castniidae. This moth, native to South America (Argentina and Uruguay), was first reported in Europe (France and Spain) in 2001, but it is believed to have been introduced before 1995 on palm trees imported from Argentina. Since then, the moth has been reported in Belgium, Bulgaria, Cyprus Islan…
Evaluation of Nonpathogenic Fusarium oxysporum and Pseudomonas fluorescens for Panama Disease Control
2011
Publication Inra prise en compte dans l'analyse bibliométrique des publications scientifiques mondiales sur les Fruits, les Légumes et la Pomme de terre. Période 2000-2012. http://prodinra.inra.fr/record/256699; Nonpathogenic Fusarium oxysporum endophytes from healthy banana roots were evaluated for their ability to reduce Fusarium wilt of banana (Panama disease). Isolates were identified morphologically and by using species-specific primers. Pathogenicity was confirmed by inoculating banana plantlets in the greenhouse. Nonpathogenic F. oxysporum isolates were grouped into 14 haplotype groups by polymerase chain reaction restriction fragment length polymorphism analysis of the intergenic sp…
Lobesia botrana larvae develop faster in the presence of parasitoids.
2013
3 pages; International audience; To combat parasitism hosts often rely on their immune system, which is the last line of defense. However, the immune system may not always be effective, and other non-immunological defenses might be favored to reduce the cost of parasite infection. Here we report that larvae of the moth Lobesia botrana can rapidly accelerate their development and reach maturity earlier in response to cues perceived at a distance from parasitoids. Such a phenotypically plastic life history shift, induced by the perception of deadly enemies in the environment, is likely to be an adaptive defensive strategy to prevent parasitoid attack, and has important implications in host-pa…
Happens in the best of subfamilies: establishment and repeated replacements of co-obligate secondary endosymbionts within Lachninae aphids.
2016
SummaryVirtually all aphids maintain an obligate mutualistic symbiosis with bacteria from theBuchneragenus, which produce essential nutrients for their aphid hosts. Most aphids from the Lachninae subfamily have been consistently found to house additional endosymbionts, mainlySerratia symbiotica. This apparent dependence on secondary endosymbionts was proposed to have been triggered by the loss of the riboflavin biosynthetic capability byBuchnerain the Lachninae last common ancestor. However, an integral large-scale analysis of secondary endosymbionts in the Lachninae is still missing, hampering the interpretation of the evolutionary and genomic analyses of these endosymbionts. Here, we anal…
Housekeepers and the Siren Call of Hotel Chains
2009
09005
L'Hôtel-Dieu de Beaune
2005
International audience
Heterogeneity of host-parasite relationships : ecological and evolution significance
2005
Although parasites have been studied for a long time, the major knowledge concern parasite which have medical or veterinary interest. Whereas they are omnipresent in the nature, the role of parasite infections on natural populations is poorly understood. One of the aim of this work was to study the pathogenicity of two groups of parasites (ticks and Haemosporidae) among natural populations of blackbirds. The study revealed that both parasites are associated with body condition and immune response. However, the study of an urban blackbird population did not confirm the effect of Haemosporidae on the survey and on the population dynamic.The impact of spatial pattern on the relation between ho…
Mixité, carrières et performances
2005
Dans le cadre du projet "Managers Plurielles", soutenu par le Fonds social européen, l'Iredu centre régional associé au Céreq a réalisé une recherche sur l'égalité des chances au sein des unités hôtelières Etap Hôtel et Formule 1. Les atouts et obstacles se conjuguent-ils de la même façon au masculin et au féminin ? Quelles sont les mesures à mettre en place pour faciliter la vie des personnels de l'hôtellerie et optimiser leurs carrières ? A travers une mosaïque de témoignages, soixante-dix-sept entretiens individuels, il s'agit d'apprécier les opportunités d'évolution et les possiblités de management et, de proposer des pistes d'action sur lesquelles l'entreprise peut agir.
L'égalité entre hommes et femmes dans le tourbillon des temps sociaux
2004
International audience; Entre emploi, loisirs et tâches domestiques, une journée se compose d'une succession de temps sociaux qui s'encha\ⁱnent, empiètent les uns sur les autres, pour s'ajuster dans un équilibre parfois fragile. Les récits du quotidien des salariés de l'hôtellerie-restauration soulignent la façon dont s'articulent activité professionnelle et vie personnelle. Dans ce secteur, les rythmes de travail sont bien souvent intensifs, variables et en décalage avec l'ensemble de la vie sociale. Ils sont surtout peu compatibles avec le fait d'être parent ou le désir d'avoir des enfants. Concilier une carrière professionnelle et la construction d'une famille nécessite des choix et une …
Les emplois à "bas salaire" et les salariés à l'épreuve de la flexibilité
2007
07036 - Disponible sur le site : http://www.cereq.fr/bref.htm