|Town/Region||Calebasses Mountain Range|
|Categories||Bats, Forests, Mammals, Plants, Primates|
|Date||15 Mar 2019|
The Mauritian flying fox Pteropus niger is the last animal that disperses large seeded plants and plays a crucial role in forest regeneration and maintenance. Mauritius has lost 98% of its original forest cover and the remaining native plants survive in isolated forest patches usually located on mountain slopes. The invasive macaque Macaca fascicularis decreases the availability of the already limited native food to P. niger, likely forcing P. niger to feed in commercial orchards and fueling the bat-human conflict. The perceived impact of P. niger on commercial fruits has repeatedly resulted in mass culling, leading to a population decline of nearly 50%.
This study aims to assess the actual impact of the invasive macaques on food availability to P. niger by radiotracking macaques in the Calebasses mountain range. A total number of 10 adult macaques will be trapped and equipped with radiocollars. After release the macaques and their respective troops will be tracked and studied throughout the year to estimate home range, population size and damage to native plants and fruits. It will provide the evidence that the current macaque population drives the bats from the forest to feed in commercial orchards.
Furthermore, a long term study on the impact of the ongoing invasion of exotic plant species on native plants will be initiated by weeding a total of 10 plots (5m by 5m) in the Calebasses mountain range. Fruit production of various native and endemic plants will be compared between weeded and non-weeded plots. Invasive weeds are one of the main drivers of the ongoing forest degradation in Mauritius and greatly limit fruit productivity of native plants. Fruit production is expected to increase dramatically within the first two years of weed removal.
This research will indicate whether control of invasive macaques and weeds can be used as efficient tools to restore native forest and increase the availability of native fruits to P. niger to help develop a conservation action plan for P. niger.
Read about Raphael's previous project https://www.rufford.org/projects/rapha%C3%ABl_reinegger or for more information contact: