Initié sur les principales méthodes d’études sur terrains sur lémuriens dans le centre de recherche de DPZ dans la forêt de Kirindy Morondava, je me suis intéressé depuis 1998 aux comportements, biogéographie et conservation des lémuriens. Avant et après mon DEA (Master) portant sur « la locomotion et l’utilisation de l’habitat par Propithecus verreauxi de la forêt de Kirindy Morondava » en 1999, et mon Doctorat sur « la biogéographie des microcèbes à travers le PN Ankarafantsika » en 2003-2007, j’ai participé à des suivis écologiques, inventaires de lémuriens dans diverses forêts, notamment au Nord-est, Est, Centre, Ouest et Nord-ouest de Madagascar. Dernièrement, du 2009 au 2017, j’ai effectué le suivi de lémuriens dans le site minier d’Ambatovy Moramanga. Parallèlement, j’ai travaillé en tant qu’enseignant permanent à la Faculté des Sciences, de Technologies et de l’Environnement de l’Université des Mahajanga, là où j’ai encadré principalement des étudiants en Master travaillant sur les lémuriens.

Jonah Ratsimbazafy is a native of Madagascar. He received his PhD in Physical Anthropology from the State University of New York at Stony Brook. He is currently the Secretary General of the Madagascar Non-human Primate Group (GERP) and the Director of the Houston Zoo Madagascar Programs. He is also an Adjunct Professor in the Faculty of Sciences and the Department of Medicine veterinary at the University of Antananarivo. His research interests include primate behavior and ecology. From 2006 to 2008, he was the Vice-President of the International Primatological Society for Conservation. He was the PI of the Project Lemurs and Forests of Madagascar funded by Earthwatch Institute. Currently, he is a co-Vice-Chair of the IUCN/SSC Specialist Group- Madagascar and counselor of the Lemur Conservation Network. Pr Ratsimbazafy leads Madagascar in biodiversity conservation. He is a prominent Malagasy primatologist and advocate spoker of lemur conservation. He has published more than 170 scientific publications (see his CV). For instance, he co-authored the 2nd and 3rd edition of the Field Guide Series: Lemurs of Madagascar. Since 2006, he is co-editors of the Lemur News journal. He continues to publish research papers. Ratsimbazafy’s most recent book entitled "Vatsin'ny Mpikaroka", which means Guidelines/Instructions for researchers" is an extraordinary inspiration for Malagasy to follow in Jonah’s footsteps.  His legacy will live on for Malagasy far into the future. Jonah Ratsimbazafy is a world class leader in primatology. He leads a new generation of primatologists. He has attended International Meetings in Japan, Vietnam, the United States, and Uganda, and given outstanding presentations. He represents Madagascar throughout the world. His success as an international primatologist and conservationist is renowned and this book represents his hard work, fine research and good deeds. In August 2013, Professor Ratsimbazafy co-organized the 5th International Prosimian Congress at Centre Valbio, Ranomafana - Madagascar. Madagascar's biodiversity is unique, but it is facing tremendous pressures due to deforestation/hunting. As a result, many species are currently on the verge of extinction. 

Dr. Onja H. Razafindratsima is an ecologist dedicated to the study of the processes and mechanisms that determine the structure and diversity of ecological communities in natural and human-modified environments. Some of her recent research focused on understanding the importance of seed dispersal by lemur frugivores in structuring plant communities in Malagasy rain forests, and the consequences of lemur loss on forest integrity and human wellbeing. She also investigates how past extinction of lemurs in the Holocene influence the structure of present-day lemur communities and how these patterns of extinctions relates to current extinction threats to improve predictions of future species declines and guide conservation efforts of these highly threatened taxa.