Thesis (BS Biology) -- University of the Philippines Mindanao, 2001

Intensive surveys of bats in Malagos Watershed, were conducted at various times, from October 2000 to February 2001. Sampled were various habitats in the lowland rainforest including their immediate environment. The habitat ranged from man-made to old-growth dipterocarp forest. Five species were recorded belonging to five genera and two families. About 3 species are endemic to the Philippine archipelago, all of which are confined to Mindanao faunal region. The details on the morphological measurement, pattern of distribution, habitat, and mode of life are presented for each species, aside from dominance and diversity assessment. Two species, Acerodon jubatus (forearm 63mm. TL 288 mm) and Rousettus amplexicaudatus (forearm 87 mm, TL 138 mm) were predominant only in agricultural areas, feeding primarily on durian and lanzones trees. Two other species, Ptenochirus jagori (forearm 82.1 mm TL 134 mm) and Cynopterus brachyotis (forearm 60 mm. TL 96 mm) were found inside the forest as well as in agricultural and disturbed areas. Thus, these two species of bats are adaptable and are not in danger of disappearing. Miniopterus tristis (forearm 54 mm, TL 124 mm) however, was found to be present only in disturbed areas, specifically near water systems like rivers and streams. Thus, it may be dependent on water and may be most affected by degradation of the forest