Surveys to identify populations

Based on the populations previously identified during my PhD research (2020–2023; https://theses.hal.science/tel-04617386v1), local guides provided information on the presence of the target species to help identify potential new populations. Linear transects were then conducted in these potential areas, enabling the assessment of species presence, population density, and associated threats.

In Ankarafantsika National Park, 13 populations were recorded across 12 zones and 3 localities, including 7 newly identified populations. Their density varies depending on species, locality, and zone.

In the Antsanitia forest, 5 populations were documented, 3 of which were newly identified. All are located in Ankaboka but distributed across two zones. Population density is lower than in Ankarafantsika and varies according to species and zone.

Identified threats are both anthropogenic—such as wildfires and illegal exploitation of forest resources—and natural, including parasitism. In Antsanitia, major pressures on the studied species include village expansion, land occupation, overexploitation of forest resources, illegal logging, and charcoal production.

Credits: Rickarlos Bezandry