Paul Webala

The Population Ecology, Diet and Movement of Straw-Coloured Fruit Bats, Eidoln Helvum (Megachiroptera: Pteropodidae) in Western Kenya

Eidolon fruit bat.

Flying Eidolon fruit bats.

Eidolon fruit bat.

Town/RegionCountryCategoriesDate
VihigaKenyaAfrica, Bats, Mammals19 Jul 2011

The project will study the diet, population ecology and movement of Eidolon helvum in western Kenya.

The study will determine the diet composition with a view of unambiguously demonstrating the role of the bats in plant regeneration and maintenance through processes of seed dispersal and pollination. This, together with assistance to develop ecotourism in the area using the bats as the focal point, will ensure the protection and justify the continued existence of the bats and its current roost.

We will study population status and trends of E. helvum in Kenya in order to understand group composition in terms of age and sex as well to get insights into the nature and patterns of migration for purposes of monitoring.

Data on reproduction will be collected over the 18-month period to understand whether or not breeding in E. helvum coincides with rainfall peaks when food for the bats is most abundant

By comparing environmental and habitat variables among three roosts; one current and the others abandoned, we hope to explain not only roost choice among Eidolon but also shed light on the probable reasons why the two roosts were abandoned; whether it was due to other factions other than deterioration of habitat conditions such as persecution.

Specific Objectives:
• To assess the population size, diet and movement of the Kakamega colony of Eidolon helvum. To identify the plant species consumed by these bats and to verify which species could be, or are being, dispersed by these animals.
• To identify and protect roosts of Eidolon helvum in Kenya
• To investigate environmental variables that influence the choice of roost by comparing selected variables with those at the previously occupied roosts
• To raise local and national awareness of the ecological services provided by fruit bats as pollinators and seed dispersers
• To build the capacity of local communities to protect fruit bat colonies

For further information contact paul.webala@gmail.com

Project Update: January 2012

We have so far collected faecal material from the bats for seed germination trials. We have collected data (to be analysed soon) on environmental variables to explain why the bats select current sites, and we have also monthly data on the numbers of bats per month per roost site for monitoring. We have also identified a number of plant species whose seeds are dispersed by the bats but this will be complete once some unidentified seeds germinate and are identified. Additionally, community outreach programmes about the bats in the area are also ongoing, although looks like that will be the last activity, as only a little money is left. We will be applying for more money, if at all possible, so that we continue on some of the activities and explore new ones for the conservation of the bats in the region.


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