Andasibe-Mantadia National Park is a 155 square kilometre protected area, located about 150 km east of Antananarivo, consisting principally of primary growth forest in Alaotra-Mangoro Region in eastern Madagascar.

[5] The Analamazaotra (or Périnet) Special Reserve (ASR), known locally as Andasibe after the nearby village, was once part of the larger Mantadia National Park which also included Maromizaha Classified Forest to the southeast and Anosibe an’ala to the south.

This disappearance has been caused primarily by logging and replacement of rain-forest with commercial Australian eucalyptus and Chinese pine forests, and to a lesser extent by slash-and-burn cultivation for rice agriculture, which is exacerbated by the extremely high population growth rate and poverty in rural Madagascar.

The aim was to take lemurs from threatened areas where habitat loss means the incumbent population is unsustainable, and relocate them to the relative safety of the Analamazaotra Special Reserve.

The project's multi-disciplinary team tracked the reintroduced groups using radio collars, and collected fecal samples to evaluate biomedical, genetic, habitat, nutritional and reproductive characteristics of the lemurs.