University of Antananarivo

About: University of Antananarivo is a education organization based out in Antananarivo, Madagascar. It is known for research contribution in the topics: Population & Lemur. The organization has 1561 authors who have published 1703 publications receiving 30922 citations. The organization is also known as: Tananarive University & Antananarivo University.

Revision of the Malagasy ponerine ants of the genus Leptogenys Roger (Hymenoptera: Formicidae)

Abstract: Leptogenys is the most diverse ponerine ant genus in the world; it is widespread throughout tropical and subtropical regions and there are over 200 extant species described. Most species have ergatoid queens, and many have falcate, bowed mandibles and are specialists on isopod prey. Here, the Malagasy Leptogenys are revised with 60 species recognized, of which 40 are newly described, 18 redescribed, and two subspecies raised to species rank and redescribed. Included in the revision are a key to species based on the worker caste, geographic distributions, descriptions of intraspecific variation, and notes on natural history. The following species are redescribed: L. acutirostris Santschi, L. alluaudi Emery, L. angusta (Forel), L. antongilensis Emery, L. arcirostris Santschi, L. coerulescens Emery, L. falcigera Roger, L. gracilis Emery, L. grandidieri Forel, L. incisa Forel, L. maxillosa (F. Smith), L. oswaldi Forel, L. pavesii Emery, L. ridens Forel, L. saussurei (Forel), L. stuhlmanni Mayr, L. truncatirostris Forel, and L. voeltzkowi Forel. The following are raised to species and redescribed: L. imerinensis Forel stat. rev., stat. n.; and L. suarensis Emery stat. rev., stat. n. The following are described as new: L. alamando sp. n., L. alatapia sp. n., L. ambo sp. n., L. andritantely sp. n., L. anjara sp. n., L. avaratra sp. n., L. avo sp. n., L. barimaso sp. n., L. bezanozano sp. n., L. borivava sp. n., L. chrislaini sp. n., L. comajojo sp. n., L. diana sp. n., L. edsoni sp. n., L. fasika sp. n., L. fiandry sp. n., L. fotsivava sp. n., L. johary sp. n., L. lavavava sp. n., L. lohahela sp. n., L. lucida sp. n., L. malama sp. n., L. mangabe sp. n., L. manja sp. n., L. manongarivo sp. n., L. mayotte sp. n., L. namana sp. n., L. namoroka sp. n., L. pilaka sp. n., L. rabebe sp. n., L. rabesoni sp. n., L. ralipra sp. n., L. sahamalaza sp. n., L. tatsimo sp. n., L. toeraniva sp. n., L. tsingy sp. n., L. variabilis sp. n., L.vatovavy sp. n., L. vitsy sp. n., and L. zohy sp. n. Most of these species are endemic to the region. Of the endemic species, two are restricted to the Comoros (L. comajojo, L. mayotte), 52 occur only in Madagascar, and two are shared by both islands (L. fiandry, L. gracilis). Three species in the maxillosa group, considered introduced to the region, are recorded from Madagascar, Comoros, Mauritius, Reunion, and Seychelles. Leptogenys stuhlmanni, the only species in the stuhlmanni group, which was collected and first described from Moheli by Forel in 1907, has not been rediscovered and may have gone locally extinct.

Field evaluation of synthetic lure (3-methyl-1-butanol) when compared to non odor-baited control in capturing Anopheles mosquitoes in varying land-use sites in Madagascar

Abstract: Background Malaria is the 4th largest cause of mortality in Madagascar. To better understand malaria transmission dynamics, it is crucial to map the distribution of the malaria vectors, mosquitoes belonging to the genus Anopheles. To do so, it is important to have a strong Anopheles-specific lure to ensure the maximum number of captures. Previous studies have isolated volatiles from the human skin microbiota and found the compound 3-methyl-1-butanol to be the most attractive to the malaria mosquito, Anopheles gambiae, in a laboratory setting; and recommended 3-methyl-1-butanol as a compound to increase An. gambiae captures in the field. To date, this compound’s ability to lure wild mosquitoes in differing land-use settings has not been tested. In this study, we evaluate the role of the synthetic compound, 3-methyl-1-butanol in combination with field produced CO2 in attracting Anopheles mosquitoes in varying land-use sites in Madagascar.

L’introduction de la notion de service environnemental et écosystémique à Madagascar

Abstract: Cet article vise a identifier les modalites de l’introduction et de l’adoption de la notion de service ecosystemique/environnemental (SE) a Madagascar, pays a mega-biodiversite et faible developpement economique. La recherche a privilegie l’etude documentaire et les entretiens. L’analyse montre l’importance des bailleurs internationaux et ONG dans l’emergence de cette notion tant au niveau macro-institutionnel, qu’au niveau des activites de terrain. Plusieurs etapes sont identifiees a travers une analyse historique : (1) fin des annees 90 : reflexion exploratoire sur la valeur totale des produits forestiers; (2) 2000-2004 : reflexion avancee avec les etudes d’economistes consacrees au financement durable et a l’extension du reseau d’aires protegees; (3) depuis 2004 : mise en œuvre de dispositifs PSE (sequestration de carbone, services hydrologiques, conservation de la biodiversite). Actuellement, les acteurs tentent collectivement de generer un projet de politique nationale, ce qui marque une grande difference avec le processus d’introduction au Costa Rica, pays pionnier des PSE, par une loi forestiere. Si le milieu de la conservation est acquis a cette notion, elle n’est pas encore acceptee par tous les acteurs du developpement. De plus, il existe a Madagascar de multiples facons d’exprimer et d’interpreter la notion de SE. Tant comme notion educative favorisant la conscience environnementale, que comme nouvelle justification de dispositifs concrets, la notion SE temoigne aussi d’une mutation de vision de la conservation. Son developpement n’est pas exempt d’opportunisme en vue du financement des institutions intermediaires dans plusieurs secteurs (foret, agriculture, energie)