Gérard Lebreton

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PREMISE OF THE STUDY Polymorphic markers were required for a native tree of the Mascarene Islands, Foetidia mauritiana (Lecythidaceae), to investigate the effects of fragmentation of lowland tropical habitats on tree mating systems and on gene flow. METHODS AND RESULTS Using microsatellite enrichment and next-generation sequencing, we identified 13(More)
The sawfly Cibdela janthina (Hymenoptera: Argidae) native to Sumatra was introduced on La Réunion (France, Indian Ocean) in 2007 to control the giant bramble Rubus alceifolius (Rosaceae), one of the most invasive plants on this island. We determined the influence of temperature on the development duration and survival of C. janthina preimaginal stages in(More)
Dans les paragraphes suivants sont présentés les thèmes de recherche sur lesquels j'ai travaillé ainsi que mes principaux résultats. Opérations élémentaires sur les polynômes Au fur et à mesure de l'évolution de mes travaux sur la résolution des systèmes algébriques et la factorisation des polynômes à plusieurs variables décrits ci-dessous, je me suis(More)
Mimusops balata (Sapotaceae) is an endemic tree species from La Réunion and Mauritius. Like many species growing in lowland forests in La Réunion, it has suffered from human disturbances. We developed twelve microsatellite markers for M. balata and tested cross-amplification in five other Mimusops species to have powerful tools for genetic diversity(More)
We introduce a new approach for shift-, scale-, and projection-invariant pattern recognition that combines the harmonic expansion and the synthetic discriminant function approaches by use of a synthetic discriminant function filter with equal-order one-dimensional logarithmic harmonic components. Because projection invariance in one direction is guaranteed(More)
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