Cartographier et suivre la dynamique de la superficie forestière et de l'occupation du sol à la périphérie de la forêt humide malgache est l'une des préoccupations des décideurs et des institutions impliquées dans le domaine de l'environnement. Une commune rurale est choisie, Androy (Région Haute Matsiatra), dans la zone périphérique du parc de Ran...
Description du sujet. Ce travail présente et analyse l'évolution de la conductivité hydraulique des surfaces cultivées et en jachère des formations pédologiques sablo-limoneuses couvrant les altérites du socle cristallin de l'Ouest du Niger. Le travail est mené en des emplacements choisis pour leur représentativité dans la zone sahélienne cultivée....
This paper investigates the eect of several survey questionnaire characteristics on em- ployment statistics. It also assess the dierences in sensitivity to survey design across gender and living area. Indeed, as suggested in the literature, women, especially those living in rural areas, are expected to be more sensitive than men to survey design, d...
Land-use changes have been significant these last decades in West Africa, particularly in the Sahel region; in this area, climatic and demographic factors have led to a rise in cropped areas in recent decades causing strong changes in the water cycle and in river regimes. This study compares the rainfall-runoff relationships for two periods (1991-1...
Plant-derived sugar is the only source of dietary carbohydrate for males of most mosquito species. Male resource acquisition and utilization remain an under-researched area of behavior in vectors of human diseases. However, the renewed interest in the use of sterile males against disease vector mosquitoes reinforces the urgent need for studies on t...
The aim of this work is to study the actual evapotranspiration and surface resistance of the savannah using the Bowen-ratio method for two contrasted periods, dry and rainy season. The reliability of this method has been assessed by comparison with the Monteith equation and the soil-water balance method in a 90% Loudetia arundinacea dominated savan...
Predominantly occurring in developing parts of the world, Buruli ulcer is a severely disabling mycobacterium infection which often leads to extensive necrosis of the skin. While the exact route of transmission remains uncertain, like many tropical diseases, associations with climate have been previously observed and could help identify the causativ...
Las reflexiones presentadas en esta obra encuentran su origen en un cruce interdisciplinario de miradas sobre el modo en que el campo de la agroecología se fue desarrollando en Francia y en Argentina. El contexto de esta reflexión está marcado por fuertes transformaciones en los modos de producción agropecuaria y en las formas de agenciarse los ter...
Background: Simple-to-use quantitative methods are needed to check the adequacy of vitamin A fortification levels. Objective: To assess the capacity of a portable fluorometer (iCheck FLUORO) and its test kit vials (iEx Mila) to quantify retinyl palmitate in fortified milks, flours (wheat, maize), and sugar. Methods: The portable fluorometer was ass...
