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Title: Population Status and Natural History of Pteropus mariannus on Ulithi Atoll, Caroline Islands 
Author: Wiles, Gary J.; Engbring, John; Falanruw, Margie V.C.
Date: 1991-01
Publisher: University of Hawai'i Press
Citation: Wiles GJ, Engbring J, Falanruw MVC. 1991. Population status and natural history of Pteropus mariannus on Ulithi Atoll, Caroline Islands. Pac Sci 45(1): 76-84.
Abstract: A census of fruit bats (Pteropus mariannus ulthiensis) was conducted
on Ulithi Atoll, Caroline Islands, in March 1986. We observed 715 bats
in 3.2 km2 of habitat on 14 of 43 islets, yielding a minimum average density of
210 bats/km2. The population of the entire atoll was estimated to be about
1200bats at an overall density of 280 bats /km2. During the day, most (89%) bats
roosted in colonies of > 5 animals. Colonies, which were typically composed of
harem groups and bachelor males, occurred most commonly in two species of
trees, Pisonia grandis and Artocarpus altilis. We recorded nine species of plants
eaten by bats , with the fruit of Pandanus tectorius and the fruit and leaf stems
of Guettarda speciosa and A. altilis fed on most frequently.
ISSN: 0030-8870

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