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Epomops franqueti
Franquet's epauletted bat


By Rachel Krumbein

Kingdom: Animalia
Phylum: Chordata
Subphylum: Vertebrata
Class: Mammalia
Order: Chiroptera
Family: Pteropodidae
Genus: Epomops
Species: Epomops franqueti

Geographic Range

Franquet’s bat (or Franquet’s epauletted fruit bat) is found in western Africa from Cote d’Ivoire through Niger, Nigeria and Cameroon, south to Angola and Zambia. It is common in most of the countries it resides in, including the Democratic Republic of Congo, Sudan, Rwanda, and Uganda. (King and Dallimer, 2010; Mickleburgh, et al., 2008)

Biogeographic Regions
ethiopian (Native )

Habitat

Franquet’s bats are solitary or live in small groups in lowland forests near bodies of water. They prefer moist tropical forests but sometimes forage in non-forested areas. They roost in trees ranging from the size of shrubs to those over 6 meters high. (Kingdon, 1974; Mickleburgh, et al., 2008; Van Cakenberghe, et al., 1999)

Habitat Regions
tropical

Terrestrial Biomes
savanna or grassland ; rainforest

Other Habitat Features
riparian

Physical Description

Range mass
78 to 158 g
(2.75 to 5.57 oz)

Range length
140 to 178 mm
(5.51 to 7.01 in)

Average wingspan
60.96 cm
(24.00 in)

Epomops franqueti is a member of the family Pteropodidae. It can be distinguished from other pteropodids by distinctive serrated ridges at the back of its palate. Its furry coat varies from deep orange to dark brown in color, and it has a white stomach, pale yellow inner-wing surfaces, and prominent white shoulder patches. Epomops franqueti also has large upper lips to aid in feeding on fruits and flowers, and lacks a tail. Males have forearms between 88 and 100 mm long, while females have forearms between 86 and 94 mm. Males generally weigh between 123 g and 158 g and females usually weigh between 78 g and 130 g. The ears of this species generally range from 25 to 27 mm. (Kingdon, 1974; Rosevear, 1965; Van Cakenberghe, et al., 1999)

Other Physical Features
endothermic ; homoiothermic; bilateral symmetry

Sexual Dimorphism
male larger

Reproduction

No information is available on the mating systems of Epomops franqueti.

Breeding interval
Franquet's bat breeds many times throughout the year.

Franquet’s epaulleted fruit bats do not have a fixed breeding season but instead, breed throughout the year. There is no additional information regarding the reproductive behavior of this species. (Jones, 1972; Kingdon, 1974)

Key Reproductive Features
iteroparous ; year-round breeding ; gonochoric/gonochoristic/dioecious (sexes separate); viviparous

No information is available concerning parental investment in Epomops franqueti. As a mammal, however, females nurse their young until they are weaned.

Parental Investment
female parental care ; pre-fertilization (Provisioning, Protecting: Female); pre-hatching/birth (Provisioning: Female, Protecting: Female); pre-weaning/fledging (Provisioning: Female)

Lifespan/Longevity

No information is available on the lifespan of Epomops franqueti. However, other Pteropodidae have been known to live up to 30 years.

Behavior

During the day, Epomops franqueti hangs in clusters of leaves in trees, its wings wrapped tightly around itself, with one foot clinging to each side of a branch. It lives alone or in small roosts, and although it is nocturnal, it is awake (although inactive) during the day. Even in captivity, E. franqueti roosts as far away from conspecifics as possible. While defecating, it either holds onto nearby branches by its thumbs and swings its legs down, or it remains hanging by its toes and allows the excrement to drip down the front of its body. (Jones, 1972)

Key Behaviors
flies; nocturnal ; solitary

Home Range

No information is available on the home range of Epomops franqueti.

Communication and Perception

This species has a variety of calls. It squawks when it is fighting and emits a nasal shriek when in danger or distress. Males call persistently throughout the night with only short breaks for feeding. Research suggests that these calls are used to attract estrus females. There is no information on whether Epomops franqueti uses phermones or chemical cues to communicate, however, such behavior is common among pteropodids. (Jones, 1972; Kingdon, 1974; Rosevear, 1965)

Communication Channels
visual ; acoustic

Perception Channels
visual ; acoustic

Food Habits

Epomops franqueti eats fruit by crushing it against the ridges on the back of its palate. When all the juice and seeds are gone, it spits the pulp out onto the ground. Although fruit is its primary diet, E. franqueti also consumes flowers. It uses its hands and wrists to eat and is frequently observed holding onto branches with its thumbs while using one wing to feed. (Jones, 1972)

Primary Diet
herbivore (Frugivore )

Plant Foods
fruit; flowers

Predation

Known Predators


Epomops franqueti is popular in the bushmeat trade, and as a result, humans in various countries actively hunt this species. Although little information is available on the major predators of E. franqueti, carnivorous birds and snakes likely prey on them. Their nocturnal lifestyle likely helps them avoid increased predation pressure by diurnal birds of prey. (Mickleburgh, et al., 2009)

Ecosystem Roles

Epomops franqueti is a frugivore and is likely an important seed disperser throughout its range. It also occasionally forages on flowers, which suggests that it may also play a marginal role as a pollinator. Epomops franqueti is also host to a number of endo- and ectoparasites including parasitic protozoa (Hepatocystis brosseti), bacteria (Eperythrozoon), viruses (Ebolavirus), batflies (Nycteribidae and Streblidae), and mites (Binuncus). (Dick and Patterson, 2006; Ewers, 1971; Miltgen, et al., 1977; Uchikawa, 1986)

Ecosystem Impact
disperses seeds; pollinates

Commensal/Parasitic Species

Economic Importance for Humans: Positive

In Benin, the Democratic Republic of Congo, and Nigeria, Epomops franqueti is hunted for their meat. (Mickleburgh, et al., 2009)

Positive Impacts
food

Economic Importance for Humans: Negative

Epomops franqueti is loud and can be heard at all hours of the night in Western Africa. In addition, it often feeds on seasonal crops of soft fruit and is therefore viewed as a pest. The species is possibly a reservoir for the Ebola virus, which is transmitted first to apes who then transmit it to humans. Scientists are unsure of the potential transmission mechanisms or how frequently this may occur. (Pourrut, et al., 2007; Rosevear, 1965)

Negative Impacts
injures humans (carries human disease); crop pest

Conservation Status

IUCN Red List of Threatened Species [Link]
Least Concern
More Information

US Federal List [Link]
No special status

CITES [Link]
No special status

Epomops franqueti is listed as a species of least concern according to the IUCN's Red List of Threatened Species. Their large population appears to be stable with no serious threats.

Other Comments

Some researchers have suggested that Epomops franqueti be divided into two subspecies: Epomops franqueti franqueti and Epomops franqueti strepitans. Epomops franqueti franqueti is found in the eastern region of the geographic range of the species and seems to be slightly larger than E. franqueti strepitans, found in the western part of the range. The lower portion of Niger is the meeting ground for these two subspecies. (Rosevear, 1965)

For More Information

Find Epomops franqueti information at

Contributors

Rachel Krumbein (author), University of Michigan, Phil Myers (editor), University of Michigan, John Berini (editor), Special Projects.

References

Delany, M., D. Happold. 1979. Ecology of African mammals. New York: Longman Group Limited.

Desroche, K., M. Fenton, W. Lancaster. 2007. Echolocation and the thoracic skeletons of bats: a comparative morphological study. Acta Chiropterologica, 12/2: 483-484.

Dick, C., B. Patterson. 2006. Bat flies - obligate ectoparasites of bats. Pp. 179-194 in S Morand, B Krasnov,, R Poulin, eds. Micromammals and Macroparasites: From Evolutionary Ecology to Management. Tokyo: Springer-Verlag.

Ewers, W. 1971. Eperythrozoon mariboi sp.nov., (Protophyta: Order Rickettsiales) a parasite of red blood cells of the flying fox Pteropus macrotis epularius in New Guinea. Parasitology, 63: 261-269.

Ifuta, N., H. Gevaerts, E. Kuhn. 1988. Thyroid Hormones, Testosterone, and Estradiol-17b in Plasma of Epomops frangueti (Tomes, 1860) (Chiroptera) in the Rain Forest of the Equator. General and Comparative Endocrinology, 69/3: 378-380.

Ifuta, N., H. Gevaerts. 1987. REPRODUCTIVE-CYCLE OF EPOMOPS-FRANQUETI (TOMES, 1860) (CHIROPTERA) OF THE KISANGANI REGION. ANNALES DE LA SOCIETE ROYALE ZOOLOGIQUE DE BELGIQUE, 117/1: 100.

Jones, C. 1972. Comparative ecology of three pteropid bats in Rio Muni, West Africa. Journal of Zoology, 167/3: 353-370.

King, T., M. Dallimer. 2010. The fruit bats (Chiroptera: Pteropodidae) of the Lesio-Louna Reserve, Bateke Plateau, Republic of Congo. Mammalia, 74/1: 63-69.

Kingdon, J. 1974. East African Mammals vol. 2A (Insectivores and Bats). Chicago, IL: University of Chicago Press.

Mickleburgh, S., A. Hutson, W. Bergmans, J. Fahr, J. Juste. 2008. "Epomops franqueti" (On-line). IUCN Redlist of Threatened Species. Accessed March 21, 2011 at http://www.iucnredlist.org/apps/redlist/details/7909/0.

Mickleburgh, S., K. Waylen, P. Racey. 2009. Bats as bushmeat: a global review. Oryx, 43/2: 217-234.

Miltgen, F., I. Landau, G. Rossin, C. Erard. 1977. Hepatocystis brosseti n. sp. Haemproteidae, parasite of Epomops franqueti, Pteropinae, in Gabon. Ann Parasitol Hum Comp, 52/6: 589-596.

Okia, N. 1974. Breeding in Franquet's Bat, Epomops franqueti (Tomes), in Uganda. Journal of Mammology, 55/2: 462-465.

Pourrut, X., A. Delicat, P. Rollin, T. Ksiazek, J. Gonzalez, E. Leroy. 2007. Spatial and Temporal Patterns of Zaire ebolavirus Antibody Prevalence in the Possible Reservoir Bat Species. The Journal of Infectious Diseases, 196/Supplement 2: S176-S183.

Rosevear, D. 1965. The Bats of West Africa. Kent, United Kingdom: Eyre and Spottiswoode Limited.

Uchikawa, K. 1986. Mites of the genus Binuncus Radford (Trombidiformes, Myobiidae) and information on host taxonomy deduced from them. Journal of Parasitology, 72/2: 257-270.

Van Cakenberghe, V., F. De Vree, H. Leirs. 1999. On a collection of bats (Chiroptera) from Kikwit, Democratic Republic of the Congo. Mammalia, 63/3: 291-322.

To cite this page: Krumbein, R. 2011. "Epomops franqueti" (On-line), Animal Diversity Web. Accessed May 31, 2012 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Epomops_franqueti.html

Disclaimer: The Animal Diversity Web is an educational resource written largely by and for college students. ADW doesn't cover all species in the world, nor does it include all the latest scientific information about organisms we describe. Though we edit our accounts for accuracy, we cannot guarantee all information in those accounts. While ADW staff and contributors provide references to books and websites that we believe are reputable, we cannot necessarily endorse the contents of references beyond our control.

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