Abstract
Knowledge about the number of bats roosting in caves is critical for their long-term conservation. These roosts may function as shelter from weather or predators, information and social centers, or as nurseries. We provide estimates of bat population from 12 hot caves in Puerto Rico, based on infrared reflectance technology. Populations ranged from a few thousands of individuals to several hundred thousand. At nine caves, estimates were performed twice at different periods during the reproductive cycle. Some caves showed notable variations in the size of the population. A database of caves used by bats throughout the island is also provided, as well as information on the species that have been identified at each cave.
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