28 research outputs found

    La structure spatiale et temporelle de l’entomofaune circulante comme indicateur biologique dans la gestion des forêts et des prairies

    No full text
    Arthropod community structure and general processes of faunistic compartimentation were studied in two French terrestrial ecosystems, both submitted to a human management. Using an original flight interception trap, the composite entomological trap, we try to show the advantages of global and standardized sampling methods which allow to analyse an overall picture of epifaunal arthropods communities with some relative moderate resources. In this way, trapped insects are also recognized at familly level, a reliable and easy method able to carry out ecological diagnosis with a strong functional signification. The main interest of these researches consists in laying the foundations for a detailed and reproductible approach, which led us to follow structural and functional characteristics of terrestrial ecosystems, giving an acute spatiotemporal accuracy. Our results let appear a significant functional response of insect communities to habitat characteristics, but also to availability and distribution of different trophic resources.Les auteurs se proposent ici d’illustrer l’intérêt des approches globales en considérant le compartiment entomologique circulant dans son ensemble. A ce titre, les résultats de deux études menées dans le cadre du suivi dynamique de deux séries végétales soumises à une gestion humaine sont présentés. La méthodologie repose sur l’utilisation d’un piège d’interception composite, le P.E.C. (Piège Entomologique Composite), ainsi que sur une approche taxinomique englobante pour laquelle le niveau systématique de la famille s’avère valide pour la réalisation de diagnoses écologiques à forte signification fonctionnelle. L’intérêt de ces recherches, outre l’originalité des résultats obtenus, permet de jeter les bases d’une approche détaillée et reproductible des caractéristiques tant fonctionnelles que structurelles des écosystèmes terrestres, ceci avec une précision spatiotemporelle très fine et des moyens relativement modestes.Mora F., Albignac Roland, Robert J.-Cl., Crétin Jean-Yves, Prouteau Cl., Robert J.-Y. La structure spatiale et temporelle de l’entomofaune circulante comme indicateur biologique dans la gestion des forêts et des prairies . In: Revue d'Écologie (La Terre et La Vie), tome 59, n°1-2, 2004. pp. 229-241

    Celecoxib and exemestane versus placebo and exemestane in postmenopausal metastatic breast cancer patients: a double-blind phase III GINECO study. Breast cancer research and treatment 116

    No full text
    Abstract The aim of this study was to evaluate antitumor effects of cyclooxygenase-2 inhibitors in breast carcinoma and their ability to act synergistically with aromatase inhibitors (AIs). Postmenopausal metastatic breast cancer patients without previous adjuvant AI treatment received exemestane 25 mg/days plus either celecoxib 400 mg twice daily or placebo. The primary endpoint was progression-free survival (PFS). This trial was prematurely terminated (N = 157 of 342 planned) after cardiovascular toxicity was reported in other celecoxib trials. Although no PFS difference was observed between the two arms (9.8 months for both, P = 0.72), a trend favoring celecoxib was observed in 60 tamoxifen-resistant patients (9.6 vs. 5.1 months; P = 0.14) and in 126 patients treated C3 months before study termination (12.2 vs. 9.8 months; P = 0.09). No severe adverse events were reported. Cyclooxygenase-2 inhibitors seemingly contribute to reverse endocrine resistance in breast cancer patients, although further study is necessary to allow development of a new therapeutic strategy
    corecore