Bat activity over calm and turbulent water

摘要: A comparison of the activity little brown bat (Myotis lucifugus) over calm pools and fast-flowing riffles was performed in southwestern Alberta. Bat assessed by monitoring echolocation calls using ultrasonic detectors. Activity higher than riffles. This could be due to differences prey abundance or accessibility two habitats. Alternatively, water noise at turbulent sites may interfere with bats' abilities. Sticky traps were used assess abundance, recorded for intensity–frequency analysis. Insect height where bats flew (< 1 m above water) did not differ between sites, but insects close level more accessible Further, decrease efficiency which detect targets.