O
Olga Ramilijaona
Researcher at University of Antananarivo
Publications - 26
Citations - 820
Olga Ramilijaona is an academic researcher from University of Antananarivo. The author has contributed to research in topics: Mantella & Rousettus madagascariensis. The author has an hindex of 14, co-authored 26 publications receiving 760 citations.
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Journal ArticleDOI
Evidence for recent gene flow between north-eastern and south-eastern Madagascan poison frogs from a phylogeography of the Mantella cowani group.
Falitiana C. E. Rabemananjara,Falitiana C. E. Rabemananjara,Ylenia Chiari,Ylenia Chiari,Olga Ramilijaona,Miguel Vences +5 more
TL;DR: The Bayesian phylogenetic and haplotype network analyses revealed the presence of three separated haplotype clades, suggesting a probable hybridization between M. cowani and M. baroni and at least three units for conservation in the Mantella cowani group.
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Sensory basis of food detection in wild Microcebus murinus
Björn Martin Siemers,Björn Martin Siemers,Holger R. Goerlitz,Eric Robsomanitrandrasana,Marcus Piep,Jean-Baptiste Ramanamanjato,Daniel Rakotondravony,Olga Ramilijaona,Joerg U. Ganzhorn +8 more
TL;DR: This study provides the first experimental data on the sensory ecology of food detection in mouse lemurs, and investigates whether they use visual, auditory, and motion cues to find and to localize prey arthropods and further whether olfactory cues are sufficient for finding fruit.
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The Challenge of Conserving Amphibian Megadiversity in Madagascar
Franco Andreone,Angus I. Carpenter,Neil A. Cox,Louis H. Du Preez,Karen Freeman,Samuel Furrer,Gerardo Garcia,Frank Glaw,Julian Glos,David Knox,Jörn Köhler,Joseph R. Mendelson,Vincenzo Mercurio,Russell A. Mittermeier,Robin D. Moore,Nirhy H. C. Rabibisoa,Herilala Randriamahazo,Harison Randrianasolo,Noromalala Raminosoa,Olga Ramilijaona,Christopher J. Raxworthy,Denis Vallan,Miguel Vences,David R. Vieites,Ché Weldon +24 more
TL;DR: Highly diverse and so far apparently untouched by emergent diseases, Malagasy frogs nevertheless are threatened by ongoing habitat destruction, making pro-active conservation actions especially important for preserving this unique, pre-decline, amphibian fauna.
Journal ArticleDOI
Hybridization between mouse lemurs in an ecological transition zone in southern Madagascar.
Mark Gligor,Jörg U. Ganzhorn,Daniel Rakotondravony,Olga Ramilijaona,Emilienne Razafimahatratra,Hans Zischler,Andreas Hapke +6 more
TL;DR: A hybrid zone in one of the few remaining ecotonal corridors between dry and humid forests in Madagascar is studied, which connects two species of mouse lemurs, Microcebus griseorufus in dry spiny forest andMicrocebus murinus in humid littoral forest, and reveals intermediate morphotypes of many individuals in transitional habitat.
Journal ArticleDOI
Study on the movement of Rattus rattus and evaluation of the plague dispersion in Madagascar.
Soanandrasana Rahelinirina,Jean Marc Duplantier,J. Ratovonjato,Olga Ramilijaona,Mamy Ratsimba,Lila Rahalison +5 more
TL;DR: Rats' movements according to the season were likely directed by the availability of food, and important indicators of vector abundance and plague transmission were higher during the high plague transmission season.